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296 results about "Diethyl fumarate" patented technology
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Dimethyl fumarate (DMF) is the methyl ester of fumaric acid. DMF was initially recognized as a very effective hypoxic cell radiosensitizer. Later, DMF combined with three other fumaric acid esters (FAE) was licensed in Germany as oral therapy for psoriasis (trade name Fumaderm).
Combination therapy for treatment of demyelinating conditions
InactiveUS20080089861A1Relieve symptomsEfficacious, safe and toleratedBiocidePeptide/protein ingredientsNR1 NMDA receptorAutoimmune condition
The invention provides compositions and methods for treating autoimmune diseases such as multiple sclerosis. The compositions include a combination of an NMDA Receptor antagonist, such as memantine or rimantadine, and a fumarate agent, such as dimethyl fumarate.
Owner:ADAMAS PHARMA INC
Medical devices to treat or inhibit restenosis
Implantable medical devices having anti-restenotic coatings are disclosed. Specifically, implantable medical devices having coatings of certain NF-kappaB inhibitors, particularly certain dialkyl fumarates, are disclosed. Dimethyl fumarate is a particularly preferred dialkyl fumarate. The anti-restenotic medical devices include stents, catheters, micro-particles, probes and vascular grafts. Intravascular stents are preferred medical devices. The medical devices can be coated using any method known in the art including compounding the dialkyl fumarate with a biocompatible polymer prior to applying the coating. Moreover, medical devices composed entirely of biocompatible polymer-dialkyl fumarate blends are disclosed. Additionally, medical devices having a coating comprising at least one dialkyl fumarate in combination with at least one additional therapeutic agent are also disclosed. Furthermore, related methods of using and making the anti-restenotic implantable devices are also disclosed.
Owner:MEDTRONIC VASCULAR INC
Novel use of dimethylfumarate
InactiveUS20100324327A1Inhibit vascular smooth muscle cell proliferationInhibiting vascular smooth muscle cell proliferationOrganic active ingredientsOrganic chemistryMedicineVascular smooth muscle
Disclosed are a pharmaceutical composition for inhibiting vascular smooth muscle cell proliferation comprising dimethyl fumarate as an effective ingredient, use of dimethyl fumarate for inhibiting vascular smooth muscle cell proliferation, and a method of inhibiting vascular smooth muscle cell proliferation employing the same. Through the present invention, it was found that dimethyl fumarate could inhibit vascular smooth muscle cell proliferation by increasing the activity of AMPK. Accordingly, dimethyl fumarate can be usefully used as an effective ingredient of a medicine for inhibiting vascular smooth muscle cell proliferation.
Owner:KYUNGPOOK NAT UNIV IND ACADEMIC COOP FOUND
Natural environmental protection type dynamic sterilizing agent and preparation method thereof
InactiveCN101336646AEffective swimmingTo achieve the effect of dynamic sterilizationBiocideDisinfectantsNepetaDisinfectant
The invention relates to a natural environmental friendly dynamic disinfectant, which is characterized by comprising the following materials: patchouli oil, artemisia vulgaris oil, nepeta oil, rosemary oil, clove oil, lavender oil, eucalyptus oil, pine needle oil, ginger oil, tea tree oil, ethanol, houttuynia, pasqueflower, rush, diethyl fumarate, baicalein, alliin and nano-silver. The disinfectant is prepared by the following steps: weighing materials by weight percent; fine grinding houttuynia, pasqueflower and rush to 20-100nm grade; distilling all materials after mixing and adding them into a distiller; then crystalling by cooling after inputting the materials into cooling pot. According to the invention, the disinfectant can realize continuous dynamic bacteriostasis in crowded public places and prevent cross infection. Besides, the disinfectant can completely volatilize without any residues, which solves the problem that traditional disinfection solutions generate corrosive goods and pollute products and has no secondary pollution.
Owner:上海拜纳环保科技有限公司
Novel synthesis process for dimethyl fumarate
InactiveCN101318901AReduce dosageGood choiceOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsFumaropimaric acidFumaric acid
The invention relates to a new process for synthesizing an antiseptic, namely dimethyl fumarate, wherein, two stages of esterification between a fumaric acid and methanol under the action of a catalyst are performed to generate the dimethyl fumarate; the catalyst is a cerous methylsulfonic acid. With application of the new process and the catalyst, the shortcomings of the prior art are overcome and production cost can be reduced effectively; and the new process has simple post-processing, less environmental pollution and good development and application prospect.
Owner:SUZHOU CHIEN SHIUNG INST OF TECH
Enteric coating, dimethyl fumarate enteric preparation, and preparation method thereof
ActiveCN104288774AImprove bioavailabilityAvoid destructionOrganic active ingredientsPharmaceutical delivery mechanismSolventBULK ACTIVE INGREDIENT
The invention discloses an enteric coating, a dimethyl fumarate enteric preparation, and a preparation method thereof. The enteric coating comprises an isolated coating layer and an enteric coating layer from inside to outside in sequence, wherein the isolated coating layer is prepared from the following raw materials by weight: an isolated coating material and a solvent; the enteric coating layer is prepared from the following raw materials including an enteric coating material, a plasticizer, an anti-sticking agent and a solvent; a mass ratio of the isolated coating material to the enteric coating layer is 1-10:3-88. The enteric coating prepared by the invention coats inner core containing active pharmaceutical ingredients, has good stability, can effectively control medicine not to release in stomach after oral administration, and can be dissolved rapidly in an enteric part, so that the inner core can be disintegrated rapidly to release the active ingredients, thereby increasing bioavailability of the active pharmaceutical ingredients by a human body, preventing the medicine from being destroyed in the stomach, reducing adverse reaction in gastrointestinal tracts, increasing safe compliance of a medicine taker and meeting use requirements of the medicine taker.
Owner:BEIJING AOTE SHUER HEALTH PROD DEV
Preparation method of antibacterial preservative for polycarboxylate-type water reducing agent
The invention relates to a preparation method of an antibacterial preservative for a polycarboxylate-type water reducing agent. The preparation method comprises the following specific steps: carrying out a free radical polymerization reaction on isopentenol polyoxyethylene ether, alkyl glycine betaine and dimethyl fumarate under the action of an initiator, a reducing agent and a chain transfer agent; adding fluconazole in a reaction process to prepare the antibacterial preservative. The preservative is formed through carrying out free radical polymerization on an antibacterial preservation monomer and polyoxyethylene ether, has a molecular structure which is similar and compatible with the polycarboxylate-type water reducing agent and belongs to a macromolecular liquid polymer; the antibacterial preservative has remarkable mildew-proof and sterilization effects for long-period storage of the polycarboxylate-type water reducing agent; the antibacterial preservative has no chloride ions and good compatibility, and is green and environmentally friendly; a water reducing performance of the polycarboxylate-type water reducing agent can be free of influences for 15 months.
Owner:JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
DMF (dimethyl fumarate) enteric-coated micropellet and preparation method thereof
ActiveCN104352441AReduce gastrointestinal side effectsAvoid sublimationOrganic active ingredientsPharmaceutical non-active ingredientsMedicineExtrusion spheronization
The invention relates to a DMF (dimethyl fumarate) enteric-coated micropellet and a preparation method thereof. The DMF enteric-coated micropellet comprises a pellet core and a double-layer enteric coating, wherein the pellet core is coated with the double-layer enteric coating. The enteric-coated micropellet is prepared by the following steps: the pellet core is prepared with the extrusion-spheronization method; and the pill-containing pellet core is coated with the double-layer enteric coating to form the enteric-coated micropellet. The obtained DMF enteric-coated micropellet is simple in preparation technology, complete in drug release and good in reproducibility, and external dose dumping risk is reduced.
Owner:SHANDONG BESTCOMM PHARMA CO LTD
Lead-free termite-proof polyvinyl chloride cable material and preparation method thereof
InactiveCN103467883AExcellent anti-termite performanceAvoid communication failurePlastic/resin/waxes insulatorsInsulated cablesCalcium silicateAluminium hydroxide
The invention discloses a lead-free termite-proof polyvinyl chloride (PVC) cable material and a preparation method thereof. The lead-free termite-proof PVC cable material is prepared from the following raw materials in parts by weight: 80 to 100 parts of SG-4 type PVC resin, 15 to 25 parts of polyvinylidene chloride, 10 to 15 parts of ethylene-propylene-diene monomer rubber, 14 to 18 parts of calcium silicate crystal whisker, 2 to 3 parts of magnesium oxide, 0.5 to 1.5 parts of palm wax, 5 to 10 parts of high impact polystyrene, 15 to 20 parts of fumed silica, 5 to 10 parts of precipitated barium sulphate, 10 to 15 parts of dimethyl fumarate, 1 to 2 parts of calaium strarate, 1 to 2 parts of imarcaptoacetate dioctyltin, 8 to 12 parts of talcum powder, 10 to 15 parts of aluminium hydroxide, 3 to 5 parts of epoxy octyl stearate, 0.5 to 1 part of antioxidant 168, 2 to 3 parts of termite-proof agent S-07 and 8 to 12 parts of composite filler. The cable material provided by the invention has excellent termite-proof performance, can effectively prevent communication faults and economic losses caused by termite corroding and is environment-friendly and lead-free; and the product has reliable physical and mechanical properties, excellent flame-retardant property and excellent low-smoke and low-toxicity characteristics.
Owner:JING FENG GRP
Addition type flame retardant liquid silicon resin and preparation method thereof
InactiveCN102220011AImprove flame retardant performanceImprove heat resistanceOrganic-compounds/hydrides/coordination-complexes catalystsCross-linkHydrogen
The invention provides addition type flame retardant liquid silicon resin. The addition type lame retardant liquid silicon resin comprises the following components in parts by weight: 100-130 parts of basic resin branched-chain phenylvinylsiloxane, 50-80 parts of active diluting agent linear phenylvinylsiloxane, 0.5-1.0 part of cross-linking agent linear phenyl modified hydrogen-containing siloxane, 0.01-0.05 part of chloroplatinic acid-divinyltetramethyldisiloxane catalyst and 0.001-0.01 part of temperature-sensitive inhibitor dimethyl fumarate. In the processes of preparing the basic silicon resin, an active diluting agent and a cross-linking agent, phenyl is used for pre-modifying so that the flame retardant property, the high-temperature resistance and the volume resistance of the product are greatly improved.
Owner:HUANGSHAN QIANGLU NEW MATERIALS
Modified diatomite environmental production antibacterial inner compartment wallpaper
InactiveCN107100038AMeet the standards of green environmental protection and energy savingImprove insulation effectSpecial visual effect coatingsCoatings with pigmentsDecompositionAdipate
The invention discloses a modified diatomite environmental production antibacterial inner compartment wallpaper, which belongs to the field of the wallpaper. The wallpaper is made by base paper by coating a PVC paste on the base paper, heating, embossing and printing the patterns on the base paper, The PVC paste comprises the following raw materials: SG-2 PVC powder, modified diatomite, attapulgite powder, nano-level calcium carbonate, anatase titanium dioxide, cellulose, Arabic gum, ethyl acrylate, dimethyl fumarate, palm oil, zinc oxide, aluminium nitride, sodium oleate, isopropyl p-hydroxy-benzoate, ethyltrimethoxysilane, N-methylolacrylamide, poly hexamethylene adipate, a plasticizer, a dispersant, a foaming agent, a foam stabilizer, and a mildew inhibitor. The PVC paste is prepared by stirring the raw materials and grinding the materials. The inner compartment wallpaper has the advantages of green environmental protection, strong adhesion capability, long usage life, good antibiosis, water resistance, mildew resistance, and adsorption and decomposition of toxic gas, and can effectively purify air and improves the indoor environment.
Owner:合肥佳洋电子科技有限公司
Method for measuring dimethyl fumarate in product by gas chromatography-mass spectrometry
InactiveCN101701943AQualitatively accurateReduce consumptionComponent separationGas phaseMass chromatography
The invention discloses a method for measuring dimethyl fumarate in a product by gas chromatography-mass spectrometry. The method comprises the following steps of: pretreating a dimethyl fumarate product to be detected by using an ultrasonic extraction method; setting the temperature of a sample injection port of a gas chromatography-mass spectrometer to be 240-280 DEG C, a flow rate to be 0.8-1.5 ml / min and the temperature of a port to be 280-300 DEG C, and selecting a weak polar column for a chromatographic column; enabling a sample to enter the chromatographic column through the sample injection port, and carrying out temperature programming on the temperature of the chromatographic column to separate the components of the sample by the chromatographic column; and enabling the components separated by the chromatographic column to enter a mass spectrometric detection part through the port of the gas chromatography-mass spectrometer, wherein an electron impact ion source is adopted as the ion source of the mass spectrometric detection. The method for measuring the dimethyl fumarate in the product by the gas chromatography-mass spectrometry has low detection limit, good detection effect, little consumption of analysis solvent and low detection cost.
Owner:NINGBO PTS PROD TECH SERVICE
Novel two-component joint beautifying agent
InactiveCN106811166AIncrease elasticityStrong resistance to yellowingNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesEpoxySolvent free
The invention relates to a novel two-component joint beautifying agent composed of components A and B. The component A comprises, by mass, 70-80 parts of polyaspartic acid ester, 5-15 parts of propylene carbonate, 5-10 parts of fumed silica and 2-5 parts of titanium dioxide, and the component B comprises, by mass, 70-85 parts of polyol and aromatic / aliphatic isocyanate polymer, 8-15 parts of 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate and 1-15 parts of diethyl fumarate. The novel two-component joint beautifying agent is composed of polyaspartic acid ester resin and a high-elasticity prepolymer curing agent formed by polymerizing polyol and aromatic / aliphatic isocyanate and has the advantages of being high in yellowing resistance, elastic and solvent-free, the problem that an epoxy resin type joint beautifying agent is not resistant to yellowing and water, is subject to influence of air temperature during construction and cannot be used outdoors is solved, and a gap in domestic joint beautifying industry is filled in.
Owner:DONGGUAN COHUI IND MATERIALS
Microbe-proof cloth and production thereof
An antimicrobial fabric is prepared through preparing the antimi crobial chemical from p-hydroxy benzoate, dimethyl fumarate, chitin protamine, and the antimicrobial component chosen from nisin, benzoic acid, sorbic acid and dehydrogenated acetic acid, and spraying it on the surface of fabric.
Owner:姚华珍
Flame-retardant liquid silicone rubber of high tear resistance
ActiveCN102977607AGood physical propertiesHigh tear strengthFibre treatmentCoatingsCross-linkPolymer science
The invention discloses a flame-retardant liquid silicone rubber of high tear resistance. The silicone rubber comprises in parts by weight the following components: 100-150 parts of MQ silicone resin, 50-100 parts of reactive diluent, which uses linear phenyl vinyl siloxane, 5-10 parts of cross-linking agent, which uses linear phenyl hydrosiloxane, 5-20 parts of reinforcing agent, which uses fumed silica, and 0.01-0.15 part of thermosensitive inhibitor, which uses dimethyl fumarate. Phenyl group is applied to pre-modifying the reactive diluent and the cross-linking agent in the preparation process of the reactive diluent and the cross-linking agent to greatly improve the flame retardant performance, the high temperature resistance and the volume resistance of the product. By combining the MQ-based silicone resin and the fumed silica in the preparation process of the silicone rubber, the prepared silicone rubber has a better physical performance and excellent tear strength.
Owner:ZHUHAI HENGWANG ELECTRONICS
Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer
The invention discloses a special early-strength polycarboxylate superplasticizer for prefabricated parts. The special early-strength polycarboxylate superplasticizer is prepared by implementing copolymerization reaction on isopentenyl polyether and an acrylamide group monomer and acrylic polypropylene glycol monoester mixed solution together with dimethyl fumarate and a molecular weight modifier as well as an initiator. The special early-strength polycarboxylate superplasticizer disclosed by the invention is high in water reduction rate, high in early strength, relatively low in shrinkage rate, good in adaptability, free of formaldehyde pollution in the production process, and particularly applicable to prefabricated parts and cement products.
Owner:东方雨虹民用建材有限责任公司
Synthesis and application of coumarin type dye sensitizer
InactiveCN103087051AImprove electrochemical performanceOrganic chemistryLight-sensitive devicesCyanoacetic acidElectron donor
Owner:ZHEJIANG UNIV OF TECH
Anti-crack high slump loss resistance concrete polycarboxylate superplasticizer
The invention discloses an anti-crack high slump loss resistance concrete polycarboxylate superplasticizer, being prepared from the following components in parts by weight: 25-35 parts of isopentenol polyethylene glycol monomethyl ether macromonomer, 40-50 parts of isopentenol polyethylene glycol monomethyl ether macromonomer, 3.5-4.5 parts of 2-propylene acyl amino-2-methyl-1-propane sulfonic acid, 4-5 parts of allyl polyoxyethylene ether, 3-5 parts of maleic anhydride, 2.5-3.5 parts of dimethyl fumarate, 3-5 parts of hydroxyalkyl acrylate, 4-8 parts of sodium hypophosphite, 0.5-1.5 parts of tartaric acid, 80-83 parts of water and 15-21 parts of sodium hydroxide. The anti-crack high slump loss resistance concrete polycarboxylate superplasticizer has good adaptability to cement, is less in amount of admixture and high in water-reducing rate, is capable of reducing water cement ratio and improving fluidity, is low in slump loss and remarkable in early strengthening effect, and is capable of improving the compactness of concrete, saving cement, improving the working performances of the concrete and improving the durability of the concrete.
Owner:HUNAN CONSTR ENG GRP COR +1
Preparation method of dimethyl fumarate
InactiveCN102757346AHigh catalytic activityHigh yieldOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsFumaropimaric acidAlcohol
The invention relates to a preparation method of dimethyl fumarate. According to the preparation method of the dimethyl fumarate, fumaric acid and methanol are taken as raw materials, an acid-functionalized ionic liquid is taken as a catalyst, and an acid-alcohol esterification reaction is carried out under relatively mild conditions so as to synthesize the dimethyl fumarate. The catalyst used in the preparation method is high in activity, low in using amount and easy to separate, recycle and reuse; the defects of difficult catalyst recovery, environment pollution and equipment corrosion in the prior art are overcome; and the preparation method of the dimethyl fumarate has a very good industrial application prospect.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Bamboo shoot preservative and application thereof
InactiveCN105394170AGood hygroscopicityImprove breathabilityFruit and vegetables preservationActivated carbonPreservative
The invention discloses a bamboo shoot preservative. The bamboo shoot preservative is composed of a liquid preservative and a solid preservative. The liquid preservative is composed of chitin, derivatives thereof, konjac gulcomannan, salicylic acid, tea polyphenol and water. The solid preservative is composed of activated carbon, ferrous sulfate, dimethyl fumarate and modified attapulgite. When the preservative is in use, bamboo shoots are treated by the liquid preservative, then, the solid preservative is placed in the bamboo shoot transportation and storage environment, and the liquid preservative and the solid preservative have the effect at the same time, so that the bamboo shoot preservation time is greatly prolonged, components are beneficial and harmless, and the good using value is achieved.
Owner:全椒县香妃农业专业合作社
Anti-corrosion graphene coating and use method thereof
InactiveCN109181476AIncrease productivityIncrease salesFireproof paintsAnti-corrosive paintsEpoxySlurry
The invention discloses an anti-corrosion graphene coating. The anti-corrosion graphene coating is characterized by containing the following raw materials in parts by weight: epoxy resin, deionized water, graphene sheets, graphene dispersion liquid, a leveling agent, a wetting and dispersing agent, pigments, an ethanol solvent, an anionic acrylic emulsion, a defoaming agent, an Rs preservative, acuring agent, polyaniline, a film forming aid, isooctyl ester, a thickener, dimethyl fumarate, a mold release preservative, a toughening agent and a silane coupling agent. The preparation method comprises the following steps: (1) mixing, and stirring; (2) adding ingredients, and stirring at a high speed, so as to obtain slurry; (3) adding the slurry into a sand mill, and carrying out sand milling;and (4) putting the slurry into a size mixing tank, and stirring at a high speed, so as obtain the anti-corrosion graphene coating. By utilizing environment-friendly materials, the quality of a product is substantially improved; the time and the materials are saved, the anti-corrosion graphene coating is convenient to use only through thin coating and has excellent properties of water resistance,heat resistance, corrosion resistance, weather resistance, stability and the like.
Owner:EVERPOWER SHENG TIE (XIAMEN) GRAPHENE TECH CO LTD
Steel surface rust-proof rust-removal liquid
InactiveCN104087961AImprove rust resistanceStrong rust removal abilityMetallic material coating processesSodium bicarbonateSodium sulfate
The invention discloses a steel surface rust-proof rust-removal liquid which is prepared from the following raw material components in parts by weight: 20-25 parts of orthophosphoric acid, 10-15 parts of boric acid, 5-10 parts of benzenesulfonic acid, 8-10 parts of tartaric acid, 3-5 parts of sodium bicarbonate, 5-8 parts of sodium hydroxide, 3-5 parts of magnesium chloride, 5-10 parts of potassium hydroxide, 5-10 parts of aluminum oxide, 5-8 parts of nickel acetate, 3-5 parts of nickel carbonate, 2-3 parts of manganese dioxide, 2-3 parts of iron oxide, 5-6 parts of oxalic acid, 3-5 parts of salicylic acid, 1-3 parts of triethanolamine, 5-7 parts of rosin, 5-8 parts of nonylphenol polyoxyethylene ether, 6-7 parts of lauryl sodium sulfate, 6-8 parts of sulfamic acid, 3-5 parts of p-toluenesulfonic acid, 3-5 parts of dimethyl fumarate and 45-50 parts of deionized water. The steel surface rust-proof rust-removal liquid disclosed by the invention has the characteristics of being good in rust-proof performance and rust-removal capability; processes such as spraying and soaking, can be adopted on the steel surface; while the dust-removal effect is generated, corrosion is converted into a compact rust-proof film, so that environmental pollution is not generated in an operation process.
Owner:梁胜光
Mould-prevention polyethylene water supply tubular product and preparation method thereof
InactiveCN104098823AImprove antibacterial propertiesImprove mechanical propertiesGlycerolMechanical property
The invention discloses a mould-prevention polyethylene water supply tubular product and a preparation method thereof. The mould-prevention polyethylene water supply tubular product is prepared from the following raw materials in parts by weight: 50-70 parts of medium density polyethylene, 25-45 parts of metallocene linear low density polyethylene, 20-30 parts of nylon 12, 15-20 parts of dimethyl fumarate, 4-8 parts of perfluorinated polyether lubricating grease, 3-6 parts of liquid paraffin, 1-2 parts of protocatechuic acid ethyl ester, 2-3 parts of propylparaben, 1.5-2.5 parts of trichlamide, 2.5-4.5 parts of antimony sulfate, 5-10 parts of jade powder, 15-20 parts of calcining loess, 2-3 parts of dodecanoic acid monoester with triglycerol, 1-2 parts of zinc undecylenate, 5-10 parts of epoxidized soybean oil, 1-2 parts of calcium stearate, 1-2 parts of barium stearate, 20-25 parts of filling master batch, 10-15 parts of dicyclohexyl phthalate, 2-3 parts of N,N'-Bis(1-methylpropyl)-1,4-phenylenediamine and 1.5-2.5 parts of chlorotributyltin. The mould-prevention polyethylene water supply tubular product has excellent antibacterial property, can effectively restrain and prevent attachment and breeding of mould, prevents mould from corroding the tubular product, has excellent mechanical property, ageing resistance, heat resistance and processability, and is long in service life and wide in application prospect.
Owner:ANHUI DINGYUAN ZHENYUN PLASTIC
Combination solution for purifying air and application thereof
ActiveCN104174256ABroad-spectrum bactericidalImprove adsorption capacityBiocideUsing liquid separation agentAlcoholAir cleaning
The invention discloses a combination solution for purifying air and application thereof. The combination solution comprises the following components in percentage by weight: 5-15% of titanium dioxide, 3-5% of silicon dioxide, 1-2% of silver, 5-10% of tourmaline, 3-8% of dimethyl fumarate, 3-9% of ethyl alcohol and the rest of water, wherein the components titanium dioxide, silicon dioxide, silver and tourmaline are nanometer powder. The combination solution for purifying the air is regularly or irregularly sprayed to the walls of public spaces and communal facilities for sterilizing and purifying the air in limited spaces; the combination solution for purifying the air can also be used in places for producing goods, grains and feeds and the like by a diffusing device for purifying the air.
Owner:爆米科技(深圳)有限公司
Continuous production process for dimethyl fumarate
InactiveCN102432464ANo pollutionLess likely to cause side effectsOrganic compound preparationCarboxylic acid esters preparationPtru catalystStrong acids
The invention discloses a continuous production process for dimethyl fumarate. The process comprises the following steps of: uniformly filling a strong acid cation exchange resin catalyst into a reaction cylinder, and heating at the temperature of between 60 and 100 DEG C; adding fumaric acid and a methanol solution which serve as reaction raw materials into the reaction cylinder from an inlet of the fixed reaction cylinder, regulating the flow velocity of a flow pump to ensure that the raw materials are kept in the reaction cylinder for 4 to 8 hours, and collecting a reaction product at an outlet; introducing the reaction product into cold water, stirring, and crystallizing a large number of white crystals; filtering, and washing a filter cake by using 8 to 10 percent Na2CO3; and filtering again, washing the filter cake to be neutral by using distilled water, drying at room temperature, and thus obtaining the dimethyl fumarate. In the process, strong acid cation exchange resin is utilized, does not corrode reaction equipment and pollute the environment, can be repeatedly used and is a good environment-friendly catalyst. The catalyst is fixed in the reaction cylinder; the materials are continuously fed and discharged, so that the continuous operation of the reaction can be realized; and the process has simple reaction conditions and makes the operation convenient.
Owner:费近峰
Production method of high-purity dimethyl fumarate
InactiveCN103848739AEliminate the recrystallization stepReduce manufacturing costOrganic compound preparationCarboxylic acid esters preparationChemical industryFiltration
The invention belongs to the technical field of the chemical industry and discloses a production method of high-purity dimethyl fumarate. The production method is characterized in that during a production process, synthesis and refining processes are finished by one step in an esterification reactor. During a refining reaction process, industrial waste fumaric acid can be taken as a raw material to react with methanol in the presence of a catalyst and a refining process is also finished during the reaction. After the methanol and the catalyst are added into the reactor, the industrial waste fumaric acid is added for reaction, subsequently the methanol and methanol mixed gas which is used for continuously generating the dimethyl fumarate are continuously added and then a high-purity dimethyl fumarate finished product can be obtained after condensation, crystallization, filtration and drying. The production method disclosed by the invention has the advantages of short technological process and high product purity, greatly lowering the cost in comparison with the existing method, and being economic and more reasonable.
Owner:徐晓宁
Flame-retarding, acid-alkali-resisting wear-resisting fire hose material
InactiveCN106349721AExcellent flame retardantExcellent flame retardant acid and alkali resistanceDecabromobiphenyl etherDecabromodiphenyl ether
The invention relates to a flame-retarding, acid-alkali-resisting wear-resisting fire hose material. The flame-retarding, acid-alkali-resisting wear-resisting fire hose material is prepared from rosin resin, p-tert-octyl phenolformaldehyde resin, amino resin, polyethylene wax emulsion, tall oil fatty acid, butyl acetate, isoamyl propionate, diethylene glycol dimethyl ether, dimethyl fumarate, sodium perborate, imidazoline, ammonium fluosilicate, guanidine phosphate powder, phenyl triethoxy silane, sodium pyrophosphate, chromium oxide, chromium chloride, menthol, barium chromate powder, ferrous orthophosphate, ethylenedioxydiethyl bis, tricresol phosphate ester, decabromodiphenyl ether, nanometer magnesium hydroxide, lignin, morpholine, polyoxyethylene polyoxy propyl alcohol amine ether, alkyl polyglucoside, propylamine, sodium ricinoleic acid. The product has excellent flame retardance, acid-base resistance, anti-mildew and anti-microbial performances, and the product performance is improved.
Owner:袁华
Tea pulp powder detergent and preparation method thereof
InactiveCN104263541AGood dispersionEasy to cleanInorganic/elemental detergent compounding agentsOrganic detergent compounding agentsSodium acetateSodium phosphates
The invention provides a tea pulp powder detergent and a preparation method thereof. A composition of tea pulp powder and three anionic surfactants (sodium lauryl alcohol sulfate, sodium tripolyphosphate and sodium dodecyl benzene sulfonate) is used as a raw material, wood meal and kaolin are added as frictional materials, and a mixture of sodium diacetate and dimethyl fumarate is used as a mold preventive. The preparation method comprises the following steps: mechanically stirring and mixing, and carrying out microwave sterilization to obtain the tea pulp powder detergent. The tea pulp powder detergent has very high oil sludge cleaning actions, lowers the chemical surfactant consumption, and reduces the environmental pollution.
Owner:吴伟銮
Preparation method of dimethyl fumarate
InactiveCN101475477ASimple and safe operationReduce corrosionPhysical/chemical process catalystsOrganic compound preparationSolid acidSolvent
The invention discloses a method for preparing fumaric dimethyl ester (DMF). The method comprises the steps of taking maleic anhydride as raw material and subjecting the raw material and methanol to catalytic reaction in the presence of a solid-acid SO4 / Al2O3 catalyst so as to obtain the fumaric dimethyl ester, namely a target product of the invention. The purity of the fumaric dimethyl ester obtained by the preparation method is up to over 98.5 percent, and the yield of the fumaric dimethyl ester is between 85 and 95 percent. Compared with the prior art, the method has the advantages that the method adopts the solid-acid SO4 / Al2O3 catalyst, is safe and convenient in operation, improves environment, reduces corrosion on equipment, can cyclically recycle reaction solvent and the solid-acid catalyst, reduces the three wastes, ensures stable product quality, and is suitable for industrial production.
Owner:SHANGHAI CHEM REAGENT RES INST
Flame retardation and antibiosis fabric
InactiveCN106009857AExcellent flame retardantGood acid and alkali resistanceFireproof paintsAntifouling/underwater paintsDiethylene glycol diethyl etherPolymer science
The invention relates to a flame retardation and antibiosis fabric. A gunny cloth fabric is bonded with a protection coating layer, and the coating layer comprises a-olefin elastomer, polymethyl methacrylate, isoprene rubber, tall oil fatty acid, butyl acetate, allyl sulfide, diethylene glycol diethyl ether, diethylene glycol butyl ether, propiconazole, sodium monofluorophosphate, dodecyl ethoxy sulfobetaine, dimethyl fumarate, cuprous chloride, metatitanic acid, silicon carbide fibers, phenyltriethoxysilane, chromium oxide green, chromium chloride, barium chromate powder, sodium cellulosate, trimethyl phosphate, polyacrylonitrile fibers, dibasic lead stearate, tris(butoxyethyl)phosphate, starch ether, vinyltris(beta-methoxyethoxy)silane, ethylamine, diethylenetriamine, alkylphenol polyoxyethylene and divinyl benzene. The flame retardation and antibiosis fabric has superior flame, acid-alkali, mildew and bacterium resistance, and improved performances.
Owner:李红玉
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