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297 results about "Dicarbonate" patented technology
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In organic chemistry, a dicarbonate, also known as a pyrocarbonate, is a compound containing the divalent [−O−(C=O)−O−(C=O)−O−] or −C₂O₅− functional group, which consists of two carbonate groups sharing an oxygen atom. These compounds can be viewed as double esters of a hypothetical dicarbonic acid, H₂C₂O₅ or HO−(C=O)−O−(C=O)−OH. Two important examples are dimethyl dicarbonate H₃C−C₂O₅−CH₃ and di-tert-butyl dicarbonate (H₃C−)₃C−C₂O₅−C(−CH₃)₃.
Method for extracting and sequestering carbon dioxide
InactiveUS6890497B2Reduce CO burdenWithout significant expenditureCalcium/strontium/barium carbonatesCombination devicesDicarbonateAlkaline earth metal
A method and apparatus to extract and sequester carbon dioxide (CO2) from a stream or volume of gas wherein said method and apparatus hydrates CO2, and reacts the resulting carbonic acid with carbonate. Suitable carbonates include, but are not limited to, carbonates of alkali metals and alkaline earth metals, preferably carbonates of calcium and magnesium. Waste products are metal cations and bicarbonate in solution or dehydrated metal salts, which when disposed of in a large body of water provide an effective way of sequestering CO2 from a gaseous environment.
Owner:LAWRENCE LIVERMORE NAT SECURITY LLC
Hybrid contact lenses prepared with expansion controlled polymeric materials
A hybrid contact lens includes a substantially rigid center portion and a substantially flexible skirt portion connected to the center portion. The skirt portion is formed using xerogels compatible with diluents comprising at least one selected from polylactic acid, polyglycolic acid, lactide, glycolide, a polyacetal, a cyclic acetal, a polyketal, a cyclic ketal, a polyorthoester, a cyclic orthoester, di-t-butyl-dicarbonate, tris(trimethylsilyl)amine, and 2,2,2-trifluoroacetamide. These diluents are formulated to function as a stand-in for water in the xerogel polymer, allowing the xerogel to form and bond to the rigid center portion in its fully expanded state. Upon hydration of the hybrid lens, substantially little dimensional change, and thus substantially little distortion, is obtained in the skirt portion. The diluents of the present invention further preserve the mechanical integrity of the xerogel, allowing the xerogel to be machined to final shape, improving the dimensional tolerances which can be achieved in the hybrid lens.
Owner:SYNERGEYES
Method for capturing co2 from exhaust gas
The present invention relates to a method for capturing CO2 from exhaust gas in an absorber (A1), wherein the CO2 containing gas is passed through an aqueous absorbent slurry wherein said aqueous absorbent slurry comprises an inorganic alkali carbonate, bicarbonate and at least one of an absorption promoter and a catalyst, and wherein the CO2 is converted to solids by precipitation in the absorber, said slurry having the precipitated solids is conveyed to a separating device (F1), in which the solids are separated off, essentially all of at least one of the absorption promoter and catalyst is recycled together with the remaining aqueous phase to the absorber.
Owner:SINVENT AS
Removing Carbon Dioxide From Waste Streams Through Co-Generation of Carbonate and/or Bicarbonate Minerals
ActiveUS20090127127A1Prevent returnChloride preparationCalcium/strontium/barium chloridesDicarbonateElectrolysis
Apparatuses and methods for removing carbon dioxide and other pollutants from a gas stream are provided. The methods include obtaining hydroxide in an aqueous mixture, and mixing the hydroxide with the gas stream to produce carbonate and / or bicarbonate. Some of the apparatuses of the present invention comprise an electrolysis chamber for providing hydroxide and mixing equipment for mixing the hydroxide with a gas stream including carbon dioxide to form an admixture including carbonate and / or bicarbonate.
Owner:CARBONFREE CHEM HLDG LLC
Alkali metal electrochemical cell having an improved cathode activated with a nonaqueous electrolyte having a carbonate additive
The present invention is directed to an unexpected benefit in a lithium cell derived from using a combination of silver vanadium oxide prepared in a temperature range of about 450° C. to about 500° C. activated with a nonaqueous electrolyte having a passivation inhibitor additive selected from a nitrite, a nitrate, a carbonate, a dicarbonate, a phosphonate, a phosphate, a sulfate and hydrogen fluoride, and mixtures thereof. The benefits include additional battery life resulting from a reduction in voltage delay and RDC build-up. A preferred electrolyte is 1M LiAsF6 in a 50:50 mixture, by volume, of PC and DME having dibenzyl carbonate added therein.
Owner:WILSON GREATBATCH LTD
System and method for treating a flue gas stream
PendingUS20050201914A1Lower volume resistivityEfficient removalCombination devicesGas treatmentParticulatesDicarbonate
The present invention is a system and method for treating a flue gas stream to remove strong acid compounds selected from the group consisting of hydrofluoric acid (HF), hydrochloric acid (HCl), sulfuric acid (H2SO4), and sulfur trioxide (SO3) by injecting a sodium sorbent selected from the group consisting of sodium sesquicarbonate, sodium carbonate-bicarbonate, trona ore, mechanically refined trona ore, and trona into the flue gas stream, calcining substantially all of the sodium sorbent in the presence of the flue gas stream to form a soda ash, reducing the concentration of the at least one strong acid compound in the flue gas stream by reacting the at least one strong acid compound with the soda ash to form a sodium based by-product; and changing the chemistry of the flue gas stream to reduce the overall average resistivity of the particulate matter.
Owner:AMERICAN ELECTRIC POWER CO INC
Nickel metal compositions and nickel complexes derived from basic nickel carbonates
ActiveUS20110196168A1Organic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsDicarbonateMetallurgy
Nickel-metal-containing solids for use in manufacturing nickel metal complexes are disclosed. The nickel-metal-containing solids are made by reducing basic nickel carbonates. By varying the molar ratios of carbonates and bicarbonates to nickel salts, the methods provide basic nickel carbonates that produce superior nickel metal-containing solids that react more effectively with phosphorous-containing ligands. The phosphorous containing ligands can be both monodentate and bidentate phosphorous-containing ligands.
Owner:INV NYLON CHEM AMERICAS LLC
Apparatus for extracting and sequestering carbon dioxide
InactiveUS7655193B1Without significant expenditureLow costCombination devicesBy chemical separationDicarbonateAlkaline earth metal
Owner:LAWRENCE LIVERMORE NAT SECURITY LLC
Nano composite anti-bacterial agent and preparation method
InactiveCN1759682AImprove the bactericidal effectBactericidalBiocideDisinfectantsDicarbonateReaction temperature
Owner:RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
Hybrid contact lenses prepared with expansion controlled polymeric materials
A hybrid contact lens includes a substantially rigid center portion and a substantially flexible skirt portion connected to the center portion. The skirt portion is formed using xerogels compatible with diluents comprising at least one selected from polylactic acid, polyglycolic acid, lactide, glycolide, a polyacetal, a cyclic acetal, a polyketal, a cyclic ketal, a polyorthoester, a cyclic orthoester, di-t-butyl-dicarbonate, tris(trimethylsilyl)amine, and 2,2,2-trifluoroacetamide. These diluents are formulated to function as a stand-in for water in the xerogel polymer, allowing the xerogel to form and bond to the rigid center portion in its fully expanded state. Upon hydration of the hybrid lens, substantially little dimensional change, and thus substantially little distortion, is obtained in the skirt portion. The diluents of the present invention further preserve the mechanical integrity of the xerogel, allowing the xerogel to be machined to final shape, improving the dimensional tolerances which can be achieved in the hybrid lens.
Owner:SYNERGEYES
Preparation method of ertabeinan sodium salt
A process for preparing Ertapeinan sodium includes such steps as reaction between [4R, 5S, 6S, 8R]-3-[(diphenyl phosphorosoacyl) oxy]-6-(1-hydroxyethyl)-4-methyl-7- oxy-1-azadicyclo [3, 2, 0 hepto-2-ene-2-carboxylate (4-nitrophenyl) methylester and (2S, 4S)-1-(4-nitrobenzyloxycarbonyl)-2-(3-hydroxycarbonylphenylamino formyl) pyrrolidine-4-yl thiol to obtain deprotecting precursor, adding Pd-C catalyst and sodium dicarbonate, and hydrodeprotecting reaction. Its advantages are high output rate and low cost.
Owner:SHANGHAI JIAO TONG UNIV
Process for recovering rare earth oxide from waste liquid containing rare earth element, and process for producing rare earth oxide using same
InactiveCN1675131AImprove efficiencySolid waste disposalRare earth metal compoundsDicarbonateOxalate
ABSTRACT Rare earth oxides capable of being re-used as an abrasive are recovered from an abrasive waste liquid by a process comprising the steps of (1) mixing and heating a rare earth element-containing waste liquid with an acid, to dissolve rare earth elements contained in the liquid; (2) removing insoluble matter from the rare earth element solution; (3) incorporating a soluble carbonate salt or a soluble hydrogencarbonate salt, or an oxalic acid in the rare earth element solution, to convert the rare earth elements to rare earth carbonates or rare earth oxalates; (4) separating the rare earth carbonates or rare earth oxalates from a slurry of the rare earth carbonates or rare earth oxalates; (5) baking the separated rare earth carbonate or rare earth oxalate to produce rare earth oxides; and (6) recovering the rare earth oxides.
Owner:SHOWA DENKO KK
Agricultural composite manure and preparing method thereof
InactiveCN1583681AReduce use costReduce pollutionAmmonium salt fertilisersUrea compound fertilisersDicarbonateSodium phosphates
An agricultural nutritive composite fertilizer able to increase the resistance of agricultural crops to diseases is prepared from ammonium molybdate, borax, sodium phosphate, urea, potassium sulfate (or chloride), complex copper, complex zinc, potassium dicarbonate and auxiliary.
Owner:陈天骏
Preparation method of nano yttrium oxide
InactiveCN1394811AControllable generationControllable granularityRare earth metal compoundsDicarbonatePolyethylene glycol
The preparation method of nano-grade yttrium oxide in rare earth oxide includes the following steps: preparing yttrium-containing inorganic acid salt aqueous solution by adopting hydrochloride or nitrate; regualting the concentration of the yttrium-untaining inorganic salt to 0.1-1.0 mol / L; adding prepared precipitant whic can be carbonate or bicarbonate or basic salt with a certain concentration; washing precipitate with deionized water; adding alcohol-like material which can be n-bulyl alcohol or ethyl alcohol to make surface modification; drying, igniting and heating, and decomposing to obtain the nano rare earth yttrium oxide. The dispersing agent added in the course of preparing yttrium-containing inorganic acid salt aqueous solution or adding precipitant can be polyethylene glycol.
Owner:施越群
Process for preparing super activated carbon from nut shell carbon and waste liquid activation treatment method of process
The invention discloses a process for preparing super activated carbon from nut shell carbon and a waste liquid activation treatment method of the process, belonging to the field of biochemical engineering and energy materials. The process comprises the following steps: soaking nut shell carbon which is subjected to pre-washing and thermal treatment A into an oxidization substance in a vacuum reaction kettle; performing thermal treatment B on the nut shell carbon soaked into the oxidization substance, and soaking into an alkali aquo-complex activating agent in the vacuum reaction kettle; in inert gas or reductive atmosphere, heating the nut shell carbon to perform thermal treatment C so as to obtain activated nut shell carbon; adding water to leach and separate the activated nut shell carbon so as to obtain alkali activated mother liquor A and a solid; adding water into the solid for leaching again so as to obtain carbonate mother liquor B and activated carbon slurry; performing multi-stage washing and acidization treatment on the activated carbon slurry, washing with water, and separating so as to obtain a crude activated carbon product; and performing thermal treatment D of different stages on the crude activated carbon product, thereby obtaining an activated carbon product. The super activated carbon with high yield and good properties can be prepared, and meanwhile useful byproducts such as bicarbonate and hydrated silica can be prepared.
Owner:BEIJING UNIV OF CHEM TECH
Method for Producing an Anion-Exchange Membrane for a Solid Polymer Electrolyte Type Fuel Cell
ActiveUS20110207028A1Improve operationImprove securityFinal product manufactureSolid electrolyte fuel cellsDicarbonatePolymer electrolytes
An anion-exchange membrane having quaternary ammonium groups or quaternary phosphonium groups wherein halogen ions serve as the counter ions is obtained. Rather than being subjected to ion exchange with an OH-type membrane using a toxic substance such as sodium hydroxide, the halogen-type anion exchange membrane is brought into contact with a carbonate solution and / or bicarbonate solution to directly obtain an anion exchange membrane where at least some of the counterions of the quaternary ammonium groups or quaternary phosphonium groups are CO32− and / or HCO3−.
Owner:TOKUYAMA CORP
Production method of poly ammonium phosphate
A process for preparing ammonium polyphosphate includes such steps as proportionally mixing polyphosphoric acid with the condensating agent chosen from urea, ammonium dicarbonate, melamine, bicynoamine, ammonium sulfate and their mixture, and reacting at 100-500 deg.C under 0.01-0.35 MPa for 5-210 min.
Owner:YUNNAN CHEM RES INST
Vehicle tyre, the tread of which comprises a heat-expandable rubber composition
A vehicle tyre includes a tread formed of a rubber composition that is heat-expandable when unvulcanized, and expanded when vulcanized. When unvulcanized, the composition includes from 50 to 100 phr of a copolymer based on styrene and butadiene; optionally from 0 to 50 phr of another diene elastomer, such as a polybutadiene or a natural rubber; more than 50 phr of a reinforcing filler, such as silica and / or carbon black; between 5 and 25 phr of a sodium- or potassium-including carbonate or hydrogencarbonate; and between 2 and 15 phr of a carboxylic acid having a melting point between 60° C. and 220° C., such as citric acid. A total content of the carboxylic acid and the carbonate or the hydrogencarbonate is greater than 10 phr. Presence of the carboxylic acid and the carbonate or the hydrogencarbonate makes it possible to significantly reduce noise emitted by the tyre during running.
Owner:MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
Cytarabine 5'-O-amino-acid ester, salts thereof and preparation method thereof
InactiveCN101812105AGood membrane permeabilityIncrease Absolute BioavailabilityOrganic active ingredientsSugar derivativesCytarabineSodium bicarbonate
The invention belongs to the technical field of medicines and discloses cytarabine 5'-O-amino-acid ester, pharmaceutically acceptable salts thereof and a preparation method thereof. The preparation method comprises the following steps of: slowly dropping carbobenzoxy chloride into a solution formed by cytarabine, sodium bicarbonate and N,N-dimethylacetylamide, and obtaining a compound A after reacting at room temperature; using the compound A and N-butyloxy formoxyl-amino acid as raw materials; adding a reagent to the solution to carry out an esterification reaction to obtain the cytarabine 5'-O-amino-acid ester; and then adding acid to obtain a finished product. The pharmaceutically acceptable salts comprise hydrochlorides, sulfates, formates, acetates, mesylates, propionates, butyrates, p-toluene sulphonates, phosphates, bisulfates, maleates, lactates, carbonates, bicarbonates, malonates, and salts formed with acidic amino acids, and the like. The invention can obviously improve the membrane permeability of the cytarabine so as to improve the bioavailability of the cytarabine.
Owner:SHENYANG PHARMA UNIVERSITY
Method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid
ActiveCN101549882AEfficient removalSimplify the precipitation washing processCopper oxides/halidesDicarbonateFiltration
The invention relates to a method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid, which comprises the following steps: mixing the acid cupriferous waste liquid and a precipitator (such as hydrocarbonate, carbonate, ammonia, sodium hydroxide or potassium hydroxide, and the like) to react until cupric ions are completely precipitated; washing precipitated slurry with a washing agent (a water solution containing a certain amount of electrolytes) after filtration, and then washing with water; and drying, calcining and pulverizing cupriferous materials after washing to obtain high-purity superfine cupric oxide powder. The acid cupriferous waste liquid can be acid etching waste liquid produced in the production of printed circuit boards. The cupric oxide powder prepared by the method has high purity, simple processes, low production cost and high economic benefit, and is suitable for industrialized production.
Owner:SHANGHAI MEADVILLE SCI & TECH
Method for dyeing chitosan fabrics by vegetable dyes
The invention discloses a method for dyeing chitosan fabrics by vegetable dyes, which comprises the following steps of: 1) performing a preprocessing process, namely performing dyeing preprocessing on the chitosan fabrics; 2) performing a dyeing process, namely putting the chitosan fabrics subjected to the preprocessing process into a dyeing machine, adding water in a bath ratio of 1:(10-30), adding carbonate and / or hydrocarbonate to regulate the pH value, adding the vegetable dyes, adding anhydrous sulfate, heating to the temperature of between 90 and 110 DEG C, maintaining the temperature for 30 to 60 minutes, discharging dye liquor, washing, and taking the fabrics out of a dye vat; and 3) performing postprocessing process, dehydrating, drying, sizing, and sizing a woollen blanket. The chitosan fabrics are dyed by the dyeing method without using a mordant, so the dyeing method is energy-saving and environment-friendly; and compared with the chitosan fabrics dyed by the other conventional methods, the chitosan content is less in loss, namely the loss is controlled within 15 percent. Simultaneously, the uniformity and stability of dyeing are improved.
Owner:上海嘉麟杰纺织科技有限公司
Method for preparing lenalidomide
InactiveCN104311536ASignificant technological progressOptimize the process routeCarbamic acid derivatives preparationOrganic compound preparationDicarbonateL-Glutamin
The invention discloses a method for preparing lenalidomide. The method comprises the following steps: firstly, etherifying 2-methyl-3-nitrobenzoic acid to obtain 2-methyl-3-nitrobenzoic acid methyl ester, brominating to obtain 2-brooethyl-3-nitrobenzoic acid methyl ester, reacting L-glutamine and tert-butyl dicarbonate to obtain N-Boc glutamic acid, acquiring 3-amino-2,6-piperidine diketone protected by Boc from N-Boc-glutamic acid in the presence of a condensing agent and a catalyst, further reacting with acid to prepare 3-amino-2,6-piperidine diketone hydrochloride, reacting 3-amino-2,6-piperidine diketone with 2-brooethyl-3-nitrobenzoic acid methyl ester so as to obtain 3-(4-nitryl-1,3 dihydro-1-oxo-2 hydrogen-isobenzazole-2-yl) piperidine-2,6-diketone, and finally reducing, thereby obtaining lenalidomide. The method disclosed by the invention is high in product yield.
Owner:SHANGHAI INST OF TECH
Method for oxidation degradation of wastewater organic pollutant by activating hydrogen peroxide
InactiveCN101503241ACompletely decolorizes and deodorizesMild reaction conditionsPhysical/chemical process catalystsWater/sewage treatment by oxidationDicarbonateAlkaline earth metal
The invention relates to a method which uses activated oxyful for oxidizing and degrading organic pollutants of waste water. Aiming at overcoming the defect of the complex catalyst preparation of the prior art, the invention provides a method, which is as follows: oxyful with a certain concentration and a catalyst or auxiliary catalyst acting as the activated oxyful are blended with organic wastewater to be treated, and then stirring is carried out for reaction. The catalyst acting as the activated oxyful is a supercarbonate which takes alkali metal lithium, sodium, potassium ion, alkaline-earth metal magnesium, calcium, cesium, barium ion or NH4 as an activated cation; and the auxiliary catalyst takes transition metal iron, manganese or copper as an activated cation and takes chloride ions, nitrate ion, or sulfate ion as an anionic salt. The method moderates reaction condition and has full decolorization and deodorizing effect on the treated sludge; and the COD removal rate can reach 25%-60%.
Owner:HUAZHONG UNIV OF SCI & TECH
Polymer Crosslinking System Comprising Soluble Zr(IV), Carbonate and Bicarbonate Ions
A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capability and the crosslinking is delayed, so that the single composition replaces several liquid additives previously necessary for generation of fluids used, for example, in hydraulic fracturing.
Owner:SCHLUMBERGER TECH CORP
Spectacle lenses made from resin, and preparing technique
InactiveCN1958643AAbsorbs evenly and effectivelySo as not to damageVacuum evaporation coatingSputtering coatingDicarbonateProtecting eye
This invention relates to resin glasses, which comprise: diethylene glycol propenyl dicarbonate (Brite-55) 50-95 wt.%, diethylene glycol propenyl carbonate (RAV 7AT) 0-48 wt.%, 2-(2'-hydroxyl-5-tert-octyl)-benzotriazol (UV-5411) 0.1-0.2 wt.%, inorganic paint B 0.3-0.4 wt.%, inorganic paint A 0.1-0.2 wt.%, diisopropyl peroxydicarbonate (IPP) 1-3.5 wt.%, distyryl dibenzotriazol (UV-0) 0.01-0.5 wt.%. The resin glasses are produced by: preparing the raw materials, filling, curing, treating the substrate glass, returning to the furnace, and treating the glasses. The obtained resin glasses can block total UV (below 400 nm) and blue-violet light (between 400-420 nm), thus can protect eyes from UV and blue-violet damage, and can satisfy the requirements of people in welding locus, banks, UV sterilization rooms, highland, torrid zones, and subtorrid zones.
Owner:JIANGSU MINGYUE PHOTOELECTRICS TECH
Image-forming method and developer
InactiveUS20050026092A1Good developing propertiesReduce harmPhotoprinting processesSemiconductor/solid-state device manufacturingDicarbonateRecording layer
Owner:FUJIFILM CORP
Removal of impurities in the production of crystalline sodium carbonate, bicarbonate, or sulfite
ActiveUS20100226840A1Reduce contentGood physical propertiesCrystallization separationAlkali metal sulfite/sulfate purificationSodium bicarbonateDicarbonate
A magnesium treatment for removing water-soluble impurities in a process for making crystalline sodium carbonate, bicarbonate, or sulfite. A waste comprising such impurities is treated with a magnesium compound to form water-insoluble matter which is removed to form a purified solution. The treatment may be performed on a solution which contains the waste and optionally dissolved calcined trona. The purified solution may be used as a feedstock to form crystalline soda ash, and / or used as a reactant to produce crystalline sodium sulfite or bicarbonate via reaction with SO2 or CO2. In preferred embodiments, the waste may comprise a purge or weak liquor, a reclaimed solid, or combinations thereof. The water-soluble impurities may be silicates and / or foam-causing impurities, and the waste may contain sodium bicarbonate, sodium sesquicarbonate, and / or one or more sodium carbonate hydrates, such as decahydrate.
Owner:SOLVAY CHEM INC
Process for preparation of silver oxide
ActiveUS20100247422A1Good dispersionMaterial nanotechnologyNanostructure manufactureDicarbonateAmmonium carbonate
The present invention relates to a process for preparation of silver oxide with various shape and size using a silver complex compound having a special structure. The present invention includes 1) step of preparing a precursor solution including a silver complex compound obtained by reacting a silver compound with one or more mixture selected from the group consisting of an ammonium carbamate-based compound, an ammonium carbonate-based compound or an ammonium bicarbonate-based compound in the presence of a solvent; and 2) step of preparing silver oxide by reacting the precursor solution including the silver complex compound of step 1) with an oxidant. The shape and particle size of the silver oxide prepared according to the preparation process of the present invention can be changed.
Owner:INKTEC CO LTD
Bamboo powder processing technology
InactiveCN1686686AImprove product qualityQuality improvementWood impregnation detailsDicarbonateAcetic acid
A process for preparing bamboo powder from bamboo or its leftover includes such steps as peeling, crushing, steaming, immersing in the solution of edible acetic acid, ammonium dicarbonate and edible sodium pyrosulfite, drying, sterilizing, grinding and sieving.
Owner:汤敏
Membrane filtration process with high water recovery
A membrane filtration process includes pretreating an influent solution to remove suspended solids, to produce a pretreated solution. pH of the pretreated solution is adjusted to at least 8.3 or lower by injecting CO2 into the pretreated solution, to produce a conditioned solution. Injecting CO2 also serves to supplement bicarbonate in the conditioned solution. The conditioned solution is flowed through a membrane filtration unit, to produce a permeate solution and a retentate solution. The membrane filtration unit comprises reverse osmosis membranes or nanofiltration membranes, or both. The retentate solution is then treated to cause precipitation, to produce a supernatant solution and a reject solution. At least a portion of the supernatant solution is recirculated by combining it with the influent solution prior to the step of pretreating.
Owner:BL TECH INC
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