43 results about "Ethynodiol Diacetate" patented technology

A process for the production of vinyl acetate is disclosed. The process comprises reacting ethylene, acetic acid, and oxygen in the presence of a catalyst to produce a reaction mixture comprising vinyl acetate, ethylene, carbon dioxide, acetic acid and ethylene glycol diacetate. The reaction mixture is separated to a gas stream comprising ethylene, oxygen, and carbon dioxide and a crude vinyl acetate stream comprising vinyl acetate, acetic acid and ethylene glycol diacetate. An ethylene glycol diacetate stream, which comprises at least 50 wt % of ethylene glycol diacetate, is isolated from the crude vinyl acetate stream and hydrolyzed to recover acetic acid. Recovered acetic acid may be recycled to the acetoxidation reaction.

The invention discloses a hard alloy extrusion forming agent, a preparation method thereof, and application of the hard alloy extrusion forming agent in extrusion production. The hard alloy extrusion forming agent comprises the following components in percentage by weight: 60 to 85 percent of a solvent namely ethylene glycol diacetate, 10 to 30 percent of a bonding agent namely ethyl cellulose and 5 to 10 percent of a surface active agent namely fatty alcohol-polyoxyethylene ether. The preparation method of the hard alloy extrusion forming agent comprises the steps of blending, mixing, heating and stirring materials. The application of the hard alloy extrusion forming agent in extrusion production of a hard alloy comprises the following steps of: blending materials, and performing ball milling on 0.8 to 3.0 weight percent of a plasticizer namely polyethylene glycol stearate and the balance of a hard alloy raw material; drying and granulating to obtain a mixture containing the plasticizer; mixing 5 to 7 weight percent of a forming agent with the mixture to obtain an extrusion feeding material; extruding a blank; drying to remove the solvent in the forming agent; curing the blank, and fixing the length of the blank through semi-finishing to form a semi-finished product; and sintering to obtain a finished product. By adopting the hard alloy extrusion forming agent, the qualified rate and labor efficiency of a product are improved, the cost is reduced, the localization, safety and environmental friendliness of raw materials are achieved, and the operating environment is improved.

The invention discloses a method for preparing high-purity ethylene glycol diacetate through direct esterification. The ethylene glycol diacetate is synthesized from ethylene glycol and acetic acid ina catalytic rectifying tower which is composed of a backpack type reactor, a rectifying section, a reaction section and a stripping section. The acetic acid is fed byin two streams, one stream of theacetic acid is fed from the lower end of the rectifying section, the other stream of the acetic acid and the ethylene glycol are mixed and then enter the backpack type reactor, the reactor contains an acid catalyst, and the ethylene glycol and the acetic acid react in the reactor and then enter a reaction rectifying tower from the upper end of the reaction rectifying tower for continuous reaction. The reaction section in the catalytic rectifying tower is filled with catalytic padding, the ethylene glycol and the acetic acid react in a tower T1 to generate the ethylene glycol diacetate (EGDA),T2 is an acetic acid recovery tower, recovered acetic acid is circularly fed into the tower T1 as a raw material, T3 is a product refining tower, ethylene glycol monoacetate (EGMA) is discharged fromthe top of the tower T3, and high-purity EGDA is discharged from a tower kettle. The method has the advantages of being high in reaction conversion rate, low in energy consumption, high in raw material utilization rate and the like.

The invention relates to an environment-friendly curtaining odor-removing PU matted varnish and a preparation method of the environment-friendly curtaining odor-removing PU matted varnish, and belongs to the technical field of wooden coating manufacturing. The environment-friendly curtaining odor-removing PU matted varnish is prepared by mixing component A, component B, and component C according to the weight ratio of 1: 0.5: 0.4-0.7; the component A is composed of fatty acid modified odor removal alkyd resin, short-oil castor oil alkyd resin, polyamide wax anti-sediment, wetting dispersant, flatting agent, antifoaming agent, modified polyethylene wax powder, matt powder, propylene glycol monomethyl ether acetate, cyclohexanone, ethylene glycol diacetate, 50% by mass of nitrocotton fluid, and n-butyl acetate; the component B is composed of aliphatic series polyisocyanate, TDI tripolymer curing agent, TDI prepolymer, and n-butyl acetate; the component C is composed of xylene, n-butyl acetate, propylene glycol monomethyl ether acetate, acetate, and ethylene glycol diacetate. The coating has strong adhesive force, good transparency, high fullness, good flexibility, good scratching resistance, uniform gloss, stability and impact-resistance, and good waterproof and chemical resistance.

The invention discloses a preparation method of ethylene glycol monoacetate and ethylene glycol diacetate. The preparation method is to take sec-butyl acetate and ethylene glycol as raw materials, perform transesterification in the presence of a base catalyst to prepare ethylene glycol monoacetate and ethylene glycol diacetate, and comprises the specific steps of primary transesterification, chemical reaction equilibrium breaking of transesterification, final-phase transesterification, separation and purification of the products ethylene glycol monoacetate and ethylene glycol diacetate, and the like. The preparation method of ethylene glycol monoacetate and ethylene glycol diacetate is high in product yield, quick in reaction speed, low in power consumption, easy to separate and purify the products, low in cost and simple in technique. In addition, the synthesis method provided by the invention can prepare an important common solvent sec-butyl alcohol. The products are all required by application, so that the utilization ratio of the products is high, the three wastes are less, and the preparation method is green and environment-friendly.

The invention relates to a device and a method for producing ethylene glycol diacetate by adopting a dividing-wall reaction rectifying column. The device comprises a dividing-wall reaction rectifying column, a condenser, an acetic acid preheater, an ethylene glycol preheater, a layering device, a main column reboiler, an auxiliary column reboiler, a raw material acetic acid feeding pump, a raw material ethylene glycol and catalyst feeding pump, an oil phase reflux pump, a water phase feeding pump and a main column kettle fluid circulating pump; the ethylene glycol diacetate is produced by virtue of esterification reaction of ethylene glycol and acetic acid which are adopted as raw materials, and water generated in the esterification reaction is separated in the dividing-wall reaction rectifying column directly by virtue of co-boiling rectification, so that the water generated in the reaction is removed out of a reaction system in time, and the reactant acetic acid can be prevented from being removed out of the reaction system along with the water. The esterification, dehydration of acetic acid and recycling of entrainer are integrally performed in one column, so that not only can the reactant conversion rate and product yield be increased, but also the integration of the esterification and dehydration of acetic acid in the same column is realized, and the energy consumption and equipment investment can be effectively reduced.

The invention discloses a starch-based modified composite material for 3D printing. The starch-based modified composite material comprises a basic power material and a water-based bonding solution, wherein the basic power material comprises, by weight, 40-60 parts of modified starch, 30-45 parts of wood fiber, 25-40 parts of maltodextrin and 15-35 parts of inorganic filler; the water-based bonding solution comprises 90 parts of solvent, 5 parts of ethylene glycol, 5 parts of ethylene glycol diacetate and 5 parts of isopropanol. A preparation method of the modified starch includes: evenly mixing water, modifying agent and starch, using sodium hydroxide to regulate pH to be alkaline, performing reaction under 45 DEG C for 10 hours, and collecting solid starch after the reaction; adding alcohol and catalyst into the solid starch, performing reflux under 60-90 DEG C for 45 hours, collecting the solid after the reaction, and drying to obtain the modified starch. The starch-based modified composite material has the advantages that the starch is modified, the forming stability and mechanical performance of the material are increased, the modified composite material is biodegradable and environmentally friendly, and the biodegradability of the material is increased.

The invention discloses a water-soluble sticking cloth resin cleaning agent and a preparation method thereof. The water-soluble cleaning agent which is used for cleaning a guiding belt table adhesive of a textile printing machine is obtained by mixing 1%-5% of propylene glycol methyl ether acetate, 10%-30% of glyceryl triacetate and 50%-80% of ethylene glycol diacetate according to a formula and filtering. The water-soluble sticking cloth resin cleaning agent prepared by the invention has good water solubility and is an organic mixed solvent with a high flashing point and a high ignition point; and the water-soluble sticking cloth resin cleaning agent has no corrosion on a printing guiding belt, has an obvious effect of removing the table adhesive, and has the characteristics of low toxicity, environmental protection, high stability and the like.

The invention provides a reactive distillation process for heavy component residue liquid produced in process of producing acetic acid through carbonylation. The reactive distillation process comprises the following steps that 1, the content of acetic acid, ethylene glycol diacetate and acetoxyacetic acid of the heavy component residue liquid is sampled and analyzed, and the content for complete acetic acid conversion is worked out; 2, heavy component residue liquid, methyl alcohol and sulfuric acid are added into a heavy component rectifying tower storage tank; 3, a heavy component reboiler heats a heavy component rectifying tower kettle through a control valve, gas-liquid mass transfer is carried out on the gas phase and the liquid phase in the heated materials, gas phase materials are condensed through a condenser and then pass through a reflux ratio controller, one part of the materials achieve reflux, the content of methyl acetate in the top of a sampling analysis tower is in a qualified range, one part of qualified products enter an ester receiving tank, a transition distillate tank and an acetoxyl group acetic acid buffer tank, and heating is stopped when no material exists on the tower top for extraction. The recycle separation method is low in energy consumption and high in acetic acid yield, and a small quantity of solid waste residues are obtained after rectification treatment.

The invention relates to a method for preparing ethylene glycol diacetate and sec-butanol and a catalyst system and device used in the method. The method comprises the following steps: sec-butyl acetate and ethylene glycol are used as raw materials, in a reactor filled with a metal wire mesh filler having the surface coated with a ZSM-5 molecular sieve membrane, a reaction is carried out under thecatalytic action of a composite catalytic system sodium ethylene glycol/N-acetylpyrrolidone, and the ethylene glycol diacetate product is separated from the reaction products. According to the methodprovided by the invention, the conversion rate of the ethylene glycol is 100%, the yield of the ethylene glycol diacetate can be up to 99.5% or more, the yield of the sec-butanol is 100%, and the method has the advantages of a high conversion rate, a high yield, less side reactions, good product quality, simple separation and the like.

The invention discloses a three-dimensional rapid formed composite powder material. The composite powder material comprises: starch-based composite powder comprising, by weight, 70-90 parts of starch, 10-15 parts of cellulose, 40-60 parts of maltodextrin, 25-45 parts of a filler and 5-10 parts of a pigment; and a water-based binding solution comprising, by weight, 90 parts of a solvent, 5 parts of ethylene glycol, 5 parts of ethylene glycol diacetate and 5 parts of isopropanol, wherein the particle size of the starch is 1-10 [mu]m, the particle size of the cellulose is 50-100 [mu]m, the particle size of the maltodextrin is 100-300 [mu]m, and the granularity of the starch-based composite powder is 200-400 meshes. Adjustment of the formula of the material and use of the water-based binding solution make the integral composite material be easy to bind and improve the forming speed, and the composite powder material which is based on the starch-based composite powder is degradable, and is an environmentally-friendly material.

Described herein is a method of removing an organic-containing material from an exposed surface of a large substrate (at least 0.25 m2). The substrate may comprise an electronic device. The exposed surface is treated with a stripping solution comprising ozone (O3) in a solvent, where the solvent comprises acetic anhydride. The stripping solvent used to form the stripping solution may comprise a mixture of acetic anhydride with a co-solvent selected from the group consisting of a carbonate containing 2 - 4 carbon atoms, ethylene glycol diacetate, and combinations thereof. In some instances, the stripping solution, may contain only acetic anhydride and ozone, where the ozone concentration is typically about 300 ppm or greater.

The invention provides water glass slurry for grouting on a mine working surface, wherein, the slurry takes ethylene acetate as a curing agent and water glass as a main agent; and 100 parts of slurrycomprises the following components by volume ratio: 15-60 parts of the water glass 38 Be, 1-10 parts of the ethylene acetate and water. In the invention, the water-soluble ethylene acetate is taken asthe curing agent; and the obtained grouting material has the advantages of low viscosity, high permeability, adjustable gelling time, simple components, non-corrosiveness and the like. The water glass slurry can be applied to the fields such as anti-seepage for hydraulic engineering, water plugging for a mine and the like, and the slurry especially has good application prospect on water blockingwith grout for the working surface of an underground microfracture stratum and a porosity stratum.

The invention provides a production method of ethylene glycol diacetate (EGDA) and relates to a chemical synthesis technology. The production method of the EGDA comprises the following steps: in presence of a catalyst, carrying out an esterification reaction by taking ethylene glycol monomethyl ether and acetic acid as raw materials, and rectifying the obtained EGDA crude product to obtain an EGDA fine product, wherein the catalyst is metal-ion-modified styrene-divinyl benzene benzenesulfonic acid type acidic cation exchange resin with composite enhanced type macropores, the cation exchange resin is made by polymerizing styrene and divinyl benzene monomers and sulfonating on a benzene ring, and the metal ion is any one of Zn<2+>, Fe<3+>, Al<3+>, Na<+>, Fe<2+> or K<+>. By adopting the production method of the EGDA, the EGDA can be continuously produced, an operating mode is simple, raw material space velocity is high, production efficiency of the EGDA can be obviously improved, production cost of the EGDA can be reduced, and discharge of solid pollutants and waste water can be reduced; a reaction product does not need to be neutralized by adopting massive alkali, and service life of the catalyst is long.

A hard shell capsule includes a body and a cap cooperatively defining a hollow core hard shell capsule. Each of the body and the cap has a composition that includes a polymer forming a hard polymer structure of the body and of the cap and comprises a drug. The body further comprises a therapeutically effective amount of drug A loaded throughout the composition; the cap further comprises a composition comprising a therapeutically effective amount of drug B loaded throughout the composition. The body and cap compositions together containing a therapeutically effective amount of the drugs A and B; said drugs being oral contraceptive agents. The core of the capsule is filled with therapeutically effective amount of a second drug(s), a dietary supplement, minerals, a complexing agent and other excipients. With the help of FIG. 2, the invention can be very well understood easily. Drugs A and B are selected from the group of oral contraceptives, but are not limited to, Cyproterone acetate, Estradiol, Oestradiol, Norethindrone acetate, Ethinyl Estradiol, Levonorgestrel, Dienogest, Drospirenone, Desogestrel, Ethynodiol, Diacetate, Mestranol, Nomegestrol acetate, Norgestrel, Norgestimate, Dienogest, Norelgestromin, Norethisterone, Gestodene, Oestradiol valerate, and Ethynodiol diacetate.

The invention relates to a clean workshop antibiosis sheet material, which employs cold rolling steel plate as inner layer and antibiosis coating as external layer, and the coating is composed of the following components by weight: 19-22 parts of carboxymethyl chitosan, 14-17 parts of copper powder, 5-6 parts of zinc powder, 8-15 parts of sodium stearate, 5-11 parts of adipic acid, 16-21 parts of urea-formaldehyde resin, 11-17 parts of ethylene acetate. The prepared clean workshop antibiosis sheet material has good antibiosis effect.

The invention relates to a PU high-fullness matte varnish for melamine boards, which belongs to the technical field of wood coating manufacturing. The PU high-fullness matte varnish for melamine boards of the present invention is composed of components A, B and C according to the weight ratio of 1:0.5:0.5-0.7; wherein component A is composed of fatty acid short oil alkyd resin, hydroxyacrylic acid Resin, xylene, wetting and dispersing agent, defoamer A, defoamer B, anti-settling slurry, matte powder, wax powder, leveling agent A, leveling agent B, adhesion promoter, cyclohexanone and n-butyl ester Composition; B component is composed of TDI trimer curing agent, TDI prepolymer, HDI trimer curing agent, xylene and n-butyl acetate; C component is composed of xylene, n-butyl acetate, propylene glycol methyl ether acetate It is composed of ester, cyclohexanone, and ethylene glycol diacetate; it significantly improves the fullness, adhesion, yellow resistance, and flexibility of matte clear topcoats. The PU high-fullness matte clear finish paint for melamine boards of the present invention can be directly sprayed on melamine boards.

The present invention relates to an implant comprising: —a core material comprising polydimethylsiloxane or at least one hydrogel polymer; —a tube encasing said core material comprising an ethylene vinyl acetate polymer or at least one hydrogel polymer; —a sealant for closure of the open ends of said tube comprising polydimethylsiloxane or a mono-, di-, or triacetoxy derivative thereof, or at least one hydrogel polymer; and —at least one active ingredient; wherein said at least one active ingredient is selected from the group comprising celecoxib, sulindac, tamoxifen, oestrogen, oestradiol, ethinyl oestradiol, mestranol, dienogest, norgestrel, levonorgestrel, desogestrel, norgestimate, ethynodiol diacetate, leuprorelin, buserelin, gonrelin, triptorelin, nafarelin, deslorelin, histrelin, and supprelin; and with the proviso that when the sealant is said at least one hydrogelpolymer, the core material comprises polydimethylsiloxane. Furthermore, the invention relates to an implant for use as a medicament. In particular, the invention relates to an implant for use in the treatment of endometriosis.

The invention particularly relates to a high-liquidity polycarboxylic acid water reducing agent which comprises 15-20% of polyether monomer, 4-9% of ethylene glycol diacetate, 3-5% of a chain transfer agent, 4-9% of sulfamic acid, 2.5-5.5% of sodium bisulfite, 1-2% of azobisisobutyronitrile, 2-5% of sodium hydroxide and the balance of deionized water. A preparation method for the high-liquidity polycarboxylic acid water reducing agent comprises the following steps: (1), adding the polyether monomer and deionized water into a reaction kettle, uniformly stirring for completely dissolving, and heating to 60+/- 2 DEG C; (2), adding sodium bisulfate and ethylene glycol diacetate, continuously stirring for 30 min, after complete dispersing, adding azobisisobutyronitrile and sulphamic acid, heating to 80+/- 2 DEG C and reacting for 30 min; (3), adding the chain transfer agent, wherein the chain transfer agent is added into the reaction kettle for five times at the interval of 10 min; (4), continuously reacting for 3 h, cooling to room temperature, adding deionized water for dissolving sodium hydroxide so as to adjust pH to 7.0; finally, replenishing deionized water, and continuously stirring for 30 min so as to obtain the water reducing agent. By adopting the water reducing agent provided by the invention, the problem that concrete collapses due to high air temperature, long transport time and other factors is solved.

The invention relates to a polyvinyl acetate emulsion and a preparation method thereof. The polyvinyl acetate emulsion is prepared from, by weight, 15-35 parts of polyvinyl acetate, 0.1-0.7 part of acrylic acid, 1-25 parts of a vinyl acetate-ethylene copolymer, 0.6-4 parts of ethylene glycol diacetate, 3-9 parts of polyvinyl alcohol, 0.01-0.4 part of lauryl sodium sulfate, 0.01-0.7 part of an anti-freezing agent, 0.1-5 parts of auxiliary agents and 45-75 parts of water. In the polyvinyl acetate emulsion, contents of formaldehyde and TVOC (total volatile organic compound) are less than nationalstandards of China, APEO (alkylphenol ethoxylates) and phthalate are avoided, and foreign limitation standards are met.