18101 results about "Ethyl acetate" patented technology

A process for selective formation of ethylene from acetic acid includes contacting a feed stream containing acetic acid and hydrogen at an elevated temperature with a first catalytic composition including a suitable hydrogenating catalyst in a first reaction zone to form an intermediate mixture including ethanol and ethyl acetate; and subsequently reacting the intermediate mixture over a suitable dehydrating and / or cracking catalyst in a second reaction zone to form ethylene. Selectivities of ethylene of over 80% are achieved.

An integral gasketed filtration cassette structure of a type comprising a filtration cassette fully or partially overcoated by a gasket layer, forming a fluid-tight seal between the filtration cassette and the filtration cassette holder to which the filtration cassette is to be affixed. The filtration cassette comprises filter sheets arranged in a multilaminate, peripherally bonded array, wherein the filter sheets alternate with permeate and retentate sheets. The gasket layer comprises an elastomeric material with suitable hardness and temperature resistance for sealing, such as silicone, ethylenepropylenedienemonomer (EPDM), viton, polyurethane, polypropylene, polyethylene, polyvinylchloride, polyester, epoxy, ethylvinylacetate, bunnas, and styrene butadiene. The filtration cassettes and filter of the invention may be advantageously employed for dewatering of aqueous biomass suspensions, desalting of proteins, removal of secreted metabolites from cellular suspensions, and the like.

Methods and systems for the production of ethyl acetate are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and mixing of a carbonyl co-reactant (e.g. acetic acid, acetaldehyde) with ethanol. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time with existing catalysts.

PCT No. PCT / CN97 / 00004 Sec. 371 Date Sep. 17, 1998 Sec. 102(e) Date Sep. 17, 1998 PCT Filed Jan. 20, 1997 PCT Pub. No. WO97 / 25968 PCT Pub. Date Jul. 24, 1997The invention relates to a tooth-whitening varnish composition, comprising 6-20% of carbamide peroxide, 2-9% of film forming agent and 77-88% of volatile organic solvent, based on the total weight of the composition. The volatile organic solvent is selected from ether, ethylacetate, ethyl alcohol, or acetone. The film forming agent is artificial or natural material selected from cellulose, polyvinyl, butyral, coumarone resin or shellac. The composition can rapidly form films on dry tooth surfaces, and a remarkable tooth-whitening effect can be obtained.

An environmentally clean dual fuel for an internal combustion engine, comprising acetylene as a primary fuel and a combustible fuel, such as one or more fluids selected from an alcohol such as ethanol, methanol or any other alcohol or alcohols from the group comprising C1-C20 carbon chains, ethers such as from the group comprising dimethyl ether, diethyl ether, methyl t-butyl ether, ethyl t-butyl ether, t-amyl methyl ether, di-isopropyl ether and the like, low-molecular-weight esters such as from the group comprising methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate and the like, or other suitable combustible fluid such as mineral spirits and the like, as a secondary fuel for operatively preventing early ignition and knock arising from the primary fuel. The dual fuel, internal combustion system, which generally utilizes a two-stage process for start-up and operation and can be operated with air- or liquid-cooling, is environmentally clean with hydrocarbon, CO, NOx, and SOx emissions substantially eliminated.

This invention provides an integrated three step economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethyl acetate which is cracked to form ethylene and acetic acid in the second step and in a subsequent step so formed ethylene and acetic acid is reacted with molecular oxygen over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C., which is cracked over a NAFION catalyst to form ethylene and acetic acid at a temperature of about 185° C., which is mixed with molecular oxygen and reacted over a palladium / gold / potassium catalyst supported on titania to form VAM at a temperature of about 150° C. to 170° C.

Process for converting synthesis gas to ethanol, including the steps of 1) introducing synthesis gas, together with methyl ethanoate and / or ethyl ethanoate, into an alcohol synthesis unit to produce methanol and ethanol, 2) separating the methanol from the ethanol of step 1, 3) introducing methanol, from step 2, together with CO, into a carbonylation unit in the presence of a methanol carbonylation catalyst, to produce ethanoic acid, and 4) introducing ethanoic acid, from step 3, together with methanol and / or ethanol, into an esterification unit to produce methyl ethanoate and / or ethyl ethanoate. In step 5), methyl ethanoate and / or ethyl ethanoate, produced in step 4, are fed into the alcohol synthesis unit of step 1, and in step 6) ethanol from step 2 is recovered.

The present invention discloses two crystal models and the preparation method of the anti-hyperuricemia drug 2-(3-ayano-4-isobuoxy phenyl)-4-methyl-5- thiazole acid. The preparation method of the crystal models commonly uses the low-toxicity ethanol, ethyl acetate or acetone as the solvent; the safety is relatively high. In addition, the hygroscopicity of the two crystal models is low in the high-humidity environment and the two crystal models are suitable for the steady pharmaceutical preparation.

A process for hydrogenating acetic acid to form of ethyl acetate and mixtures of ethyl acetate and ethanol. The hydrogenation is done in the presence of catalyst, preferably on a support that optionally includes a support modifier.

A method of co-producing vinyl acetate and ethyl acetate includes: (a) reacting ethylene, acetic acid and oxygen to form vinyl acetate and at least a minor amount of ethyl acetate; (b) providing a crude product stream containing the vinyl acetate and ethyl acetate of step (a) and acetic acid to a distillation tower; (c) separating the crude product stream into: (i) a vinyl acetate product stream enriched in vinyl acetate with respect to the crude product stream; (ii) an acid recycle stream enriched in acetic acid with respect to the crude product stream; (iii) a mixed sidestream containing vinyl acetate and ethyl acetate, the mixed sidestream being enriched in ethyl acetate with respect to the vinyl acetate product stream; and (d) hydrogenating vinyl acetate in the mixed sidestream to provide an ethyl acetate product stream.

The invention provides a preparation method of triazine structure containing benzoxazine intermediate, which sequentially includes: (1) performing synthetic reaction of aldehyde compound and amine compound at a molar ratio of at least 1:1 which includes adding aldehyde compound and solvent of at least one of clean water, methanol, ethanol, isopropanol, and ethyl acetate into a reactor at the room temperature under the normal pressure to obtain mixed solution with aldehyde mass concentration of no greater than 95%, adding amine compound while stirring, and reacting at 0-100 DEG C under the normal pressure for at least 15 minutes to obtain the reactant liquor; (2) pouring into the cleaning solution, stirring and cleaning, and filtering to collect solid substance, or directly filtering the reactant liquor to collect the solid substance; and (3) drying the solid substance obtained in step (2) at 30-100 DEG C.

The invention provides a preparation method of dispersible silane functionalized graphene. The method comprises the steps of: conducting ultrasonic dispersion to graphene oxide in absolute ethyl alcohol so as to form a uniform graphene oxide dispersion solution, then adjusting the pH value to 3-4, or under the protection of an inert atmosphere, adding silane into the dispersing solution for modification, with silane and graphene oxide in a mass ratio of 0.1:1-5:1, continuing the reaction for 12h-48h at a temperature ranging from normal temperature to 78DEG C, carrying out centrifugation, then adding hydrazine hydrate to the obtained solid, performing heating reduction, and filtering the reaction solution, then washing and drying the filter cake, thus obtaining dispersible silane functionalized grapheme. The method of the invention is simple and practicable, and the obtained silane functionalized grapheme has good dispersibility in solvents like absolute ethyl alcohol, acetone, toluene, ethyl acetate, butyl acetate, and tetrahydrofuran (THF), etc.

A thermocured, heat conductive and heat radiating paint for an LED lamp is prepared by the following raw materials by weight: 40-45 parts of polyacrylic resin, 5-8 parts of polyurethane resin, 4-6 parts of polyacrylamide, 6-8 parts of isophorone diamine IPDA, 20-24 parts of xylene, 2-3 parts of silane coupling agent KH550, 1-2 parts of aluminium powder, 8-12 parts of ethyl acetate, 2-4 parts of benzyltrimethylammonium tribromide, 10-12 parts of aluminium nitride, 2-3 parts of beryllia, and 4-5 parts of film forming auxiliary agent. Aluminium nitride powder, the beryllia and the aluminium powder are added, so as that the paint has high heat conduction rate and good heat radiation effect, and can be long-term used under 200 DEG C without change of mechanical property; polyacrylic resin is used, so as that the paint has advantages of excellent fullness, glossiness, hardness, solvent resistance and weatherability, without color change and brightness reversion when high temperature baked; and the paint has advantages of large adhesion stress, not-easy shedding, aging resistance and long usage life.

The present invention relates to extraction and purification of functional components in Chinese herbal medicine and aims at provindg extraction and purification process of chlorogenic acid in honeysuckle in relatively high yield and purity. The techonlogical scheme includes twice reflux extraction of honeysuckle cut into sections with dilute alcohol, concentrating the extractive, flocculating for initial purification and final purification through macroporous resin or ethyl acetate extraction. The said process is simple and practical and has less loss of chlorogenic acid and high product yield and purity.

The invention discloses an extracting polyphenol, theanine, tea polysaccharide and tea pigment method from tea, which is characterized by the following: using deionized water for lixiviating tea at constant temperature with continuous flow upstream at multi-speed; adopting microstrainer to dislodge the foreign matter of raffinate; using hyperfiltration for putting-off pectin and protein; concentrating by hyperfiltration and dehydration; extracting tea polyphenol by acetic acid ethyl ester and recovering dissolvant; stripping caffeine of extracting extract phase, pesticide residue and dissolvant by CO2 supercritical fluid; getting tea polyphenol by low-temperature nitrogen spray-drying; using alcohol separation and low temperation vacuum drying by hyperfiltration trapped fluid to prepare tea polysaccharide; separating alcohol recrystallization by basic copper carbonate and hydrogen sulfide to get theanine; using enzymatic oxidation and alkaline air to oxygenate remain polyphenols substance of liquid phantom; getting tea pigment by hyperfiltration dehydration compression and vacuum drying; merging caffeine form carbon dioxide above-critical fluid and caffeine from carrene; recovering dissolvent; using deionized water for washing; obtaining caffeine by recrystallization vacuum drying.

The present invention relates to an acrylic pressure sensitive adhesive composition comprising (meth)acrylic copolymers including alkyl(meth)acrylic acid ester monomer having 1˜12 carbon atoms of alkyl group, characterized in that the gel content is 10˜55%, the swelling ratio is 30˜110, the weight average molecular weight of sol eluted from the adhesive by ethyl acetate is at least 800,000, the molecular weight distribution is 2.0˜7.0; and a polarizer and a liquid crystal display comprising the above composition show excellent durability under a high temperature and humidity condition, and can improve the light leakage phenomenon and provide excellent operability at the time of manufacturing polarizer by effectively providing high modulus and stress release property.

A process for producing a brightness stabilization mixture of water-soluble organic compounds from biomass pyrolysis oils comprising:a) size-reducing biomass material and pyrolyzing the size-reduced biomass material in a fluidized bed reactor;b) separating a char / ash component while maintaining char-pot temperatures to avoid condensation of pyrolysis vapors;c) condensing pyrolysis gases and vapors, and recovering pyrolysis oils by mixing the oils with acetone to obtain an oil-acetone mixture;d) evaporating acetone and recovering pyrolysis oils;e) extracting the pyrolysis oils with water to obtain a water extract;f) slurrying the water extract with carbon while stirring, and filtering the slurry to obtain a colorless filtrate;g) cooling the solution and stabilizing the solution against thermally-induced gelling and solidification by extraction with ethyl acetate to form an aqueous phase lower layer and an organic phase upper layer;h) discarding the upper organic layer and extracting the aqueous layer with ethyl acetate, and discarding the ethyl acetate fraction to obtain a brown-colored solution not susceptible to gelling or solidification upon heating;i) heating the solution to distill off water and other light components and concentrating a bottoms fraction comprising hydroxyacetaldehyde and other non-volatile components having high boiling points; andj) decolorizing the stabilized brown solution with activated carbon to obtain a colorless solution.

The LixMn2O4 powder for cathode active material of a lithium secondary battery of the present invention is prepared by a method of comprising the steps of mixing an acetate aqueous solution using Li acetate and Mn acetate as metal precursors, and a chelating agent aqueous solution using PVB, GA, PAA or GC as a chelating agent; heating the mixed solution at 70 DIFFERENCE 90 DEG C. to form a sol; further heating the sol at 70 DIFFERENCE 90 DEG C. to form a gel precursor; calcining the produced gel precursor at 200 DIFFERENCE 900 DEG C. for 5 DIFFERENCE 30 hours under atmosphere. The cathode active material, LixMn2O4 powder for a lithium secondary battery in accordance with the present invention has a uniform particle size distribution, a high crystallinity and a pure spinel-phase, and a particle size, a specific surface area, a lattice of a cubic structure and the like can be controlled upon the preparing conditions. The present invention also provides a method of preparing LiNi1-xCoxO2 powder, which comprises the steps of providing a gel precursor using PAA as a chelating agent and hydroxide, nitrate or acetate of Li, Co and Ni as metal precursors; heating the gel precursor at 200 DIFFERENCE 900 DEG C. for 5 DIFFERENCE 30 hours to form a powder. The LixMn2O4 and LiNi1-xCoxO2 powder of the present invention can be used for a cathode active material of a lithium secondary battery such as a lithium ion battery or lithium polymer battery.

The invention provides a carbon nano material / metal nano material composite nano ink which comprises solvent, an additive, a carbon nano material and a metal nano material. The carbon nano material / metal nano material composite nano ink is characterized in that the solvent can comprise water, alcohol organic solvent (ethanol(alcohol), isopropanol, n-butanol and the like), ester organic solvent (ethyl acetate, butyl acetate, ethylene-propylene acetate and the like), benzene organic solvent (methylbenzene, dimethylbenzene and the like) and ketone organic solvent (cyclohexanone, acetone, methylethylketone, butanone and the like); the additive comprises surfactant, pH value stabilizer, defoaming agent, diluter, reinforcer and the like; the carbon nano material comprises a single-layer carbon nanotube, a double-layer carbon nanotube, a multi-layer carbon nanotube and graphene; the metal (copper, silver, gold, platinum, nickel and the like, also including an alloy nano material, an ITO metal composite nano material and the like) nano material further comprises a metal nanoparticle, a metal nanowire or a metal nanotube; the components of the nano ink must include one carbon nano component and one metal nano component, such as a single-layer carbon nanotube and copper nanowire composite ink, a double-layer carbon nanotube and silver nanowire composite ink, a single-layer carbon nanotube and silver nanoparticle composite ink or any other possible combination; the components can be regulated according to specific applications; and a composite nano conductive film can be formed on different bases through different electronic printing processes. The ink can be used in the printing of a flexible base material and can be conveniently prepared into a flexible conductive film.

The invention relates to a method for extracting dihydromyricetin, ampelopsis grossedentata amylase and ampelopsis grossedentata polyphenol from ampelopsis grossedentata. The method comprises the following processing steps of: (a) crushing raw materials: drying and crushing fresh ampelopsis grossedentata stem leaves; (b) leaching: extracting with hot water and centrifugally collecting supernatant fluid; (c) concentrating: decompressing and concentrating the supernatant fluid I, cooling, standing still and centrifugally collecting precipitate and supernatant fluid II; (d) extracting dihydromyricetin: recrystallizing and drying the precipitate in vacuum to obtain dihydromyricetin; (e) alcoholizing: decompressing and concentrating the supernatant fluid II, depositing in alcohol and centrifugally collecting a precipitate and supernatant fluid III; (f) extracting crude polysaccharides: purifying the precipitate, drying in vacuum or spraying and drying to obtain ampelopsis grossedentata amylase; and (g) extracting ampelopsis grossedentata polyphenol: decompressing and concentrating the supernatant fluid III, extracting with ethyl acetate, concentrating and drying to obtain ampelopsis grossedentata polyphenol or absorbing with AB-8 resin, eluting with distilled water, eluting with ethanol and collecting eluate, concentrating and drying in vacuum to obtain ampelopsis grossedentata polyphenol. The method has the advantages of low cost, higher product yield and environmental protection, is suitable for industrial continuous production and can comprehensively develop and utilize ampelopsis grossedentata resources and improve the economic benefits.

Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid by hydrolyzing a portion of the crude ethanol product or one or more derivative streams obtained therefrom. The one or more derivative streams comprise ethyl acetate and the hydrolyzed stream is directly or indirectly fed to the distillation zone or the hydrogenation reactor.

The comprehensive process of extracting tea polysaccharide, tea polyphenol, theanine and coffine from tea includes the following steps: water or organic solvent extraction of tea powder under the action of microwave, concentration, precipitation and water dissolving the extract liquid, salt separating to eliminate protein and separation in gel column and drying to obtain tea polysaccharide; chloroform extraction of the raffinate, ethyl acetate extraction of the chloroform raffinate and drying to obtain tea polyphenol; No. 732 cationic exchange resin extraction of the ethyl acetate raffinate, concentration, crystallization and drying to obtain theanine; and crystallizing and drying the chloroform extract liquid to obtain coffine. The present invention has the advantages of short extraction time, high extraction rate, less loss of active matter, etc.

The invention aims to provide a method for synthesizing novel perfluoropolyether alkoxysilane applied to anti-fingerprint paint through reaction of perfluoroalkyl ether acyl fluoride, allyl amine and trimethoxy silane. The method is characterized by comprising the following steps: (1) adding perfluoroalkyl ether acyl fluoride and allyl amine into a reaction vessel at the molar ratio of 1 to (1-1.1), adding a certain amount of solvent and alkali into the reaction vessel, and performing stirring overnight at a room temperature; performing filtration, performing distillation under reduced pressure to remove the solvent, and performing silica gel column separation, wherein an eluting agent is composed of heptane and ethyl acetate at the ratio of 6 to 1, and a product is obtained after the solvent is removed; (2) a certain amount of product obtained in the step (1) and a catalyst are added into a reaction kettle, sealing the reaction kettle, performing nitrogen protection, placing the reaction kettle in oil bath, heating the reaction kettle to specified temperature, and performing stirring for reaction for 48 hours; quickly cooling the reaction kettle to room temperature after the reaction is finished; performing distillation under reduced pressure on the product of the reaction to remove solvent, and then performing separation and purification through silica gel columns to obtain the product (namely the novel perfluoropolyether alkoxysilane). The product prepared by the invention is applied to anti-fingerprint paint, has the characteristics of fingerprint reduction, easiness in cleaning, wear resistance and the like, and is suitable for lots of base materials, such as glass, plastic, metal and films.

A fluoride POSS acrylic resin block copolymer resin and its synthesis are disclosed. The molecular-weight of copolymer Mn is 20000-60000, Mn / Mw is 1.1-1.5, contact angle between coating and water is 85-120degree. The process is carried out by adding components into reactor to obtain methyl acrylate performed polymer with Br end capping, reacting with CuBr, PMDETA and F-POSS, removing catalyst from reactant, depositing while filtering by methanol, vacuum drying to constant weight to obtain the final product. The polymer powders can be dissolved into acetic ether, acetone, 1,2-dichloroethane, dioxane and cyclohexanone or their mixtures, then it can be used for coating or filming.

The invention discloses a natural non-buta crystallite which is characterized by fine grain size and good dissloving degree and its compound. Said crystallite is prepared through disslovant crystallization, and said disslovatn is non- toxic acetic ester. The invention is characterized in that the product is safe, the preparation method is more environment- friendly, and the micronizing or other extra treatment for process preparing solid medicine and turbid liquor are avoided.

A process for the selective production of ethyl acetate by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form ethyl acetate is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C.

The invention discloses a roselle extract as well as a preparation method and application thereof. The roselle extract is prepared through the following steps: adding roselle into deionized water or an ethyl acetate solvent; performing ultrasonic extraction at 25 DEG C for 15-30 minutes; filtering the liquid with a 0.45-micron microporous filtration membrane, and collecting the filtrate; performing vacuum rotary evaporation under a condition of controlling the vacuum degree at 0.094-0.096MPa to obtain a roselle extract concentrate; freeze-drying the concentrate to obtain the roselle extract. The application of the roselle extract as a whitening skincare agent and particularly in skin cosmetics is as follows: the roselle extract is added into the skin cosmetics at a mass ratio (roselle to skin cosmetics) of (0.01-10):100; moreover, the preparation process is simple and easy to implement, and the finally obtained skin cosmetics are natural and safe and have the characteristics of whitening capacity, oxidation resistance and the like.

The present invention relates to antifungal and antibacterial activity of processed Morinda citrifolia products, as well as from various fractions of extracts from these processed products and the Morinda citrifolia L. plant, and related methods to determine mean inhibitory concentrations. In particular, the present invention relates to ethanol, methanol and ethyl acetate extracts from Morinda citrifolia L. and their inhibitory activities on common fungi and bacteria and the identification of mean inhibitory concentrations.

The invention discloses a spherical montmorillonite mesoporous composite carrier and a preparation method thereof, a supported benzenesulfonic acid catalyst and a preparation method thereof, an application of the catalyst in an esterification reaction, and a preparation method of ethyl acetate. The spherical montmorillonite mesoporous composite carrier contains montmorillonite and a mesoporous molecular sieve material, average particle size of the spherical montmorillonite mesoporous composite carrier is 30-60 micrometers, the specific surface area is 150-600 square meters / gram, pore volume is 0.5-1.5 milliliters / gram, aperture distribution is trimodal distribution, most probable apertures corresponding to three peaks are 2-4 nanometers, 5-15 nanometers and 10-40 nanometers respectively. The provided supported benzenesulfonic acid catalyst has the advantages of high catalytic activity and repeated usage.