78 results about "Diglyme" patented technology

The invention discloses a method for purifying ethylenediamine, comprising the following steps: (1) heating extractant, feeding the extractant in to an extracting tower from the upper part of the extracting tower, gasifying 60.0-92.0% water-bearing ethylenediamine, feeding the ethylenediamine into the lower part of the extracting tower, making the ethylenediamine reversely contact the extractant on the upper part of the extracting tower in the extracting tower, discharging water from the top of the extracting tower and separating the mixture of the ethylenediamine and the extractant at the bottom of the extracting tower, wherein the extractant is diethylene glycol monomethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether or diethylene glycol monobutyl ether; and (2) heating the mixture of the ethylenediamine and the extractant, feeding the mixture of the ethylenediamine and the extractant to the middle part of the extracting tower, rectifying the mixture ofthe ethylenediamine and the extractant in a rectifying tower, separating the ethylenediamine on the top of the rectifying tower and discharging the extractant from the bottom of the rectifying tower.The method is mainly used for purifying the ethylenediamine.

The invention discloses a liquid metal anode material, a room-temperature liquid metal battery, and a preparation method and an application. The anode material is a black green liquid which is formed by mixing alkali metal, an aromatic compound and an ether solvent, wherein the alkali metal is any one of metal sodium, metal lithium or metal potassium; and the aromatic compound is any one of biphenyl, derivatives of the biphenyl, naphthaline, derivatives of the naphthaline and anthracene or derivatives of the anthracene; and the ether solvent comprises one or more of glycol dimethyl ether, diethylene glycol dimethyl ether or tetraethylene glycol dimethylether and the like.

The invention relates to a synthetic method for preparing o-phenyl phenol by ring opening of dibenzofuran. The synthetic method comprises the following steps: using dibenzofuran as a raw material, using glycol dimethyl ether or diethylene glycol dimethyl ether as a solvent, adding metallic sodium, reacting under the protection of nitrogen, adjusting pH to less than 3 by adding aqueous phase concentrated hydrochloric acid, precipitating a brown oily matter, extracting by the use of ethyl acetate, drying by the use of anhydrous sodium sulfate, carrying out pressure reduction to remove the solvent, and recrystallizing by the use of petroleum ether so as to obtain o-phenyl phenol. The method provided by the invention has advantages of high yield, relatively low cost and good effect, and has a wide application prospect.

The invention discloses a method for producing n-vinyl pyrrolidone (NVP). With the adoption of diethylene glycol dimethyl ether as a catalyst, not only are the effects of a convectional catalyst of reducing the reaction temperature, shortening the reaction time, improving the conversion rate, inhibiting the side reaction and improving the product yield achieved, but also the cost for producing NVP is effectively lowered because the price of diethylene glycol dimethyl ether is lower than the conventional catalyst, so that the method is more beneficial for industrial production.

The invention discloses a preparation method of graphene, which comprises the following steps that: hexabromobenzene and substances A are added into solvents, are stirred into a mixed solution and are heated to take reaction for 2 to 48 hours at 100 to 200 DEG C, and a reaction system is oxygen-free or aerobic environment and the normal pressure or pressurized environment in the pressure aspect; the proportion of the hexabromobenzene to the substances A to the solvents is 0.1 to 50mg / 0.05 to 500mg / 1mL; the solvents are Bis(2-methoxy ethyl)ether, diphenyl ether, diethyl ether, tetrahydrofuran, toluene or benzene; the substances A are CuBr, CuI, CuCl, Cu or Ni. The preparation method has the advantages that the reaction condition is mild, the process is simple, and in addition, good reproducibility is realized. The prepared graphene is single-layer graphene. The graphene is used as chemical reaction raw materials, catalyst carriers and battery electrode materials and has wide application prospects in the aspects of physics and microtronics.

The present invention is directed to an aqueous amine resin corrosion inhibitor composition and methods of using the same for inhibiting corrosion in equipment in contact with alkanolamine, hot carbonate solutions, diglyme and / or other solvents and acid gases such as carbon dioxide, hydrogen sulfide or a mixture of the two. The inhibitor preferably relates to compositions useful for inhibiting corrosion in environments in contact with alkanolamine, hot carbonate solutions, diglyme, and / or solvent gas treating systems and acid gases, and more particularly, to an amine resin solution made by reacting sterically hindered amines such as those selected from the group consisting of alkyl diamines, alkyltriamines, amino alcohols and mixtures thereof with aldehydes, aldehyde donors, the reaction product of lower alkanolamines and lower aldehydes, and mixtures thereof. The subject compositions are preferably made by reacting the sterically hindered amines and aldehyde compounds in about a 1:1 molar ratio at a temperature ranging from about 110° F. to 120° F., using a sufficient amount of the sterically hindered amine to produce a reaction product having a pH ranging from about 10.5 to about 12.0.

The invention relates to lithium-sulfur battery electrolyte capable of improving battery capacity and a preparation method thereof. The electrolyte is prepared from organic solvents, a lithium salt and an additive and is characterized in that the organic solvents include a first solvent, a second solvent and a third solvent; the first solvent is one or more of 1,3-dioxolane, 1,4-dioxane and 1,1-dimethoxyethane; the second solvent is one or more of glycol dimethyl ether and diglyme; the third solvent is one or more of dimethyl sulfide organics; the volume ratio of the first solvent to the second solvent is (0.5 to 2) : 1, and the volume fraction of the third solvent in the organic solvents is 10 to 40%. Dimethyl ether organics are reduced into methyl lithium sulfur and can contribute capacity except positive active materials. By means of the unique work principle, lithium sulfur batteries prepared from the electrolyte have the characteristics of achieving and even exceeding the theoretical capacity of the lithium sulfur batteries.

A manufacturing process for the preparation of bisphosphonic acids and in particular zoledronic acid is provided wherein diglyme, monoglyme, or a mixture thereof, is utilized to produce a homogenous, water soluble, solid reaction mass that upon cooling, dissolving in water and stripping results in a high purity product and comparatively good yield. wherein Ri is selected from the group consisting of

The invention discloses a stabilizer composition suitable for HFC-161 and HFC-161 mixed working medium. The stabilizer composition is composed of two ingredients; a first ingredient is a combination material comprising one, two, or more than three selected from 4-methoxyphenol, 2-hydroxy-4-methoxybenzophenone, 4-tert-butylcatechol, 2, 2-bis(4-Hydroxyphenyl)propane and benzophenone; and the second ingredient is diethylene glycol dimethyl ether and / or 2-(2-Methoxyethoxy)ethanol. The stabilizer composition is capable of ensuring that HFC-161 cycled in a refrigerating system is not decomposed at a high temperature of 175 DEG C.

The invention belongs to reference electrolyte capable of improving the cycling performance of a lithium-sulfur battery and a preparation method. The reference electrolyte is prepared from an ether type solvent, lithium salt, lithium nitrate and an additive for improving the cycling performance, wherein the ether type solvent is a mixture of two solvents; a first solvent is any one of 1,3-dioxolane and 1,4-dioxane; a second solvent is any one of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether; the lithium salt is any one of LiPF6, LiBF4,LiTFSi, LiFSi and LiBOB; the additive for improving the cycling performance is any one of 3-aminopropyltriethoxysilane, hexamethyldisilane and tetraethyl silicate. The reference electrolyte has the advantages that a preparation process is simple, the prices of the solvents and the additive are cheap, and materials are saved; the reference electrolyte can have a good negative electrode lithium protection effect; after lithium-sulfur battery electrolyte is used in the lithium-sulfur battery, the cycling performance and the safety of the lithium-sulfur battery can be remarkably improved.

The invention provides an ultralow-temperature high-voltage chip aluminum capacitor-used electrolyte, which comprises 32% to 58% of a main solvent, 5% to 34% of an auxiliary solvent, 5.2% to 21.4% ofa solute, 2.5% to 8.5% of a flash fire booster, 0.7% to 2.5% of a hydrogen scavenger and 1% to 10% of a modified synthetic additive, wherein the main solvent is one or multiple selected from ethyleneglycol, diethylene glycol, triethylene glycol, ethylene carbonate, propylene carbonate, gamma-butyrolactone and the like; and the auxiliary solvent is one or multiple selected from diethylene glycol mono-methyl ether, diethyl carbitol, diethylene glycol ethyl methyl ether, diglycol dimethyl ether, triethylene glycol dimethyl ether, diethylene glycol monobutyl ether, dimethyl sulfoxide, sulfolane and the like. The ultralow-temperature high-voltage electrolyte has good negative temperature electric performance, higher stability and stronger applicability.

The invention belongs to the field of synthesis of organic intermediates, and specifically discloses an ultrasonic-assisted synthesis method for a benzoic acid compound. The method comprises the following step: promoting air oxidation of benzyl alcohol by using diethylene glycol dimethyl ether under an ultrasonic-assisted action so as to obtain the benzoic acid compound, wherein a benzyl alcohol raw material is benzyl alcohol, or a benzoic acid derivative containing one to five substituents at different positions on the benzene ring of benzyl alcohol; and a reaction accelerator is the diethylene glycol dimethyl ether. The method provided by the invention has the advantages of easily-available raw materials, simple and convenient reaction conditions, short reaction time, greenness, energy conservation, high reaction selectivity and yield, excellent compatibility of substrate functional groups, and high application value.

The invention discloses a capacitor thin film with high performance, and belongs to the technical field of electronic components. The capacitor thin film with high performance is specifically prepared from, modified polyethylene terephathalate, polyimide, modified diatomite, bisphenol-A epoxy resin, nanometer silicon dioxide, nanometer boron fiber, dimethyl formamide, triallyl cyanurate, polystyrene, diethylene glycol dimethyl ether, antioxidant, heat stabilizer, and ultraviolet light absorber. In actual use, the thin film with high performance shows an excellent stretch-proof property and a high-temperature resistant property; meanwhile, the thin film and a clad layer are adhered and combined tightly and stably mutually, thus residual interior air is reduced, probability of generation of air breakdown is further lowered, and finally the service life of the capacitor can be prolonged by 30% or above.

The invention belongs to a cathode lithium protection lithium-sulfur electrolyte and a preparation method thereof. The cathode lithium protection lithium-sulfur electrolyte is prepared from an ether solvent, a lithium salt and transition metal nitrate; the ether solvent is a mixture of two solvents, a first solvent is arbitrary one of 1,3-dioxolane and 1,4-dioxane, and a second solvent is arbitrary one of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether; the lithium salt is arbitrary one of LiPF6, LiBF4, LiTFSi, LiFSi and LiBOB; and the transition metal nitrate is arbitrary one of La(NO3)3.9H2O, Zr(NO3)4.5H2O and Ce(NO3)3.6H2O. The cathode lithium protection lithium-sulfur electrolyte has the advantages that the configuration processis simple, the cost is low, used materials are saved, the effect of protecting cathode lithium can be exerted, the capacity retention rate and the cycle stability of a battery are enabled to be obviously improved, and the safety coefficient of the battery is greatly improved.

The invention relates to an in-situ synthesis method for polyhydroxy fatty acid ester block copolymer. The method comprises the following steps of: (1) mixing polyhydroxy fatty acid ester with diethylene glycol dimethyl ether at the bath ratio of 1:30, heating and stirring the materials, raising the temperature to 140 DEG C, adding dibastic alcohol and organic tin catalyst, taking products out after 4 to 10 hours of reaction and performing precipitation, pumping filtration and drying so as to obtain telechelic-type polyhydroxy fatty acid ester; and (2) mixing the telechelic-type polyhydroxy fatty acid ester with intro-cross ester at the molar ratio of 1:10-20, supplying the two with nitrogen and continuing to heat the two to 120 to 140 DEG C, adding the organic tin catalyst, stirring the materials for 3 to 16 hours for reaction, taking out and dissolving reaction products with chloroform, precipitating and drying the reaction products to constant weight so as to obtain the polyhydroxy fatty acid ester block copolymer. The block copolymer synthesized by the method is controllable in molecular weight, components and the length of every block. The synthesis method has the advantages that raw materials used by the method are wide and easy to get, and the method is simple in synthesis process, performs ring-opening polymerization in a state free from solution, and is environment-friendly.

The photosensitive resin composition comprises (a) an acrylic copolymer obtained by copolymerizing (i) an unsaturated carboxylic acid, an unsaturated carboxylic acid anhydride or a mixture of them, (ii) an epoxy-containing unsaturated compound and (iii) an olefinically unsaturated compound, (b) a 1,2-quinonediazido compound and (c) one or more solvents selected from the group consisting of benzyl alcohol, hexyl alcohol, diethylene glycol dimethyl ether, diethylene glycol methylethyl ether, diethylene glycol diethyl ether, dipropylene glycol diethyl ether, dipropylene glycol dimethyl ether and dipropylene glycol methylethyl ether. So this invention provides a photosensitive resin composition which is excellent in performances such as sensitivity transmittance, insulation and chemical resistance, remarkably improves flatness and coating property in particular, and is suitable for forming an interlayer insulating film in a process for fabricating LCD, etc.

The invention discloses a method for continuous extraction rectification separation of an azeotrope of dimethyl carbonate and methanol. The invention relates to the method for separating dimethyl carbonate and methanol, and mainly solves a problem that operation of apparatus is not stable in a continuous production process when an ionic liquid is used as an extracting agent. The separation methodis extraction rectification, and a mixed extraction agent is adopted in extraction rectification, wherein one of the mixed extracting agents is an ionic liquid with anions of hexafluorophosphate radicals, and the mixed extraction agent is one selected from diethylene glycol dimethyl ether, triethylene glycol dimethyl ether or tetraethylene glycol dimethyl ether. The separation method can be used to realize continuous separation of dimethyl carbonate and methanol, product quality and running stability of the apparatus are stable, and the method can be applied to an industrial production process.

The invention relates to a preparation method and a refining method of olanzapine, belonging to the field of medicine preparation. 4-amino-2-methyl-10H-thieno[2,3-b][1,5]-benzodiazepine hydrochloride and N-methylpiperazine reflux reaction, or in diethylene di Refluxing reaction in alcohol dimethyl ether, after the reaction is over, vacuum distillation recovers excess N-methylpiperazine or vacuum distillation recovers excess N-methylpiperazine and diethylene glycol dimethyl ether solvent to obtain olanzapine solid The crude product is recrystallized with ethanol aqueous solution, filtered and dried to obtain the olanzapine product; then dissolved with ethanol under reflux, decolorized with a decolorizing agent, filtered, and the filtrate is cooled to room temperature for crystallization, filtered and dried to obtain refined olanzapine. The invention has the advantages of avoiding highly toxic solvents in the preparation process, little pollution and safe operation; fast reaction, reducing energy consumption; recovering excessive raw materials and solvents, appropriately reducing costs; high yield; olanzapine The refined product has high purity (>99.5%, HPLC) and stable quality.

The invention provides a preparation method of alkali-soluble solid dispersant resin. The preparation method includes uniformly mixing acrylic acid, styrene, alpha-methyl styrene, maleic anhydride, di-tert-butyl peroxide and / or tert-butyl peroxybenzoate at room temperature to obtain mixture A, adding linear alcohol ethoxylates and solvent diethylene glycol dimethyl ether into a reactor with heating to 140-160 DEG C,adding the mixture A under nitrogen atmosphere, then heating up to 170-185 DEG C for polymerization reaction for 20-60 min, and performing reduced pressure distillation after reaction to obtain the alkali-soluble solid dispersant resin. During mass polymerization of styrene and acrylic acid, the hydrophilic-lipophilic amphiphilic component, namely linear alcohol ethoxylates is added, the terminal hydroxyl group of the linear alcohol ethoxylates reacts with maleic anhydride or acrylic acid in the system to form a hydrophilic-lipophilic side chain, the lipophilic group at the terminal of the side chain changes bonding point distribution of dispersant and pigment, bonding stability of dispersant and pigment is improved beneficially, and dispersing performance on pigment is improved.

The invention relates to a synthetic method for preparing o-phenyl phenol by ring opening of dibenzofuran. The synthetic method comprises the following steps: using dibenzofuran as a raw material, using glycol dimethyl ether or diethylene glycol dimethyl ether as a solvent, adding metallic sodium, reacting under the protection of nitrogen, adjusting pH to less than 3 by adding aqueous phase concentrated hydrochloric acid, precipitating a brown oily matter, extracting by the use of ethyl acetate, drying by the use of anhydrous sodium sulfate, carrying out pressure reduction to remove the solvent, and recrystallizing by the use of petroleum ether so as to obtain o-phenyl phenol. The method provided by the invention has advantages of high yield, relatively low cost and good effect, and has a wide application prospect.

The invention provides a separation method of an azeotrope of dimethyl carbonate and methanol. The invention relates to a separation method of dimethyl carbonate and methanol, and mainly solves the problem of unstable operation of a device in a continuous production process using ionic liquid as an extractant. The separation method is extractive distillation, the extractive distillation adopts a mixed extractant, wherein one component of the mixed extractant is ionic liquid with an anion of bistrifluoromethanesulfonimide radical, and the other component of the mixed extractant is one of diethylene glycol dimethyl ether, triethylene glycol dimethyl ether or tetraethylene glycol dimethyl ether. The separation method can realize the continuous separation of dimethyl carbonate and methanol. The product quality and the device operation are stable. The separation method can be used in the industrial production process.

The invention relates to a new preparation method of trimethylbenzoquinone. The method use one or two of n-butyl alcohol, n-pentanol, isopentyl alcohol, hexanol, 2-hexanol, diethylene glycolmonobutylether, diethylene glycolmonobutylether, dimethoxyethane, diethylene glycoldimethylether and acetylacetonate as solvent and gelatinous resin or macroporous resin-supported transition metal complex as catalyst. Trimethylbenzoquinone is prepared by oxidizing trimethylphenol at 0-150 DEG C adopting molecular oxygen, oxygen-enriched gas or air as oxidant wherein the molar ratio of trimethylphenol to catalyst is 100:1-1:1, the weight ratio of trimethylphenol to alcohol is 50:1-1:50, and the resin-supported transition metal catalyst is D201, D301, D002, 201, 301 or 002 resin. The best advantage of the catalyst is that the catalyst can be used in the fixed bed and trickle bed and can be used for continuous operation.

The invention discloses a method for preparing hydrogen silane by using calcium hydride to conduct reduction on chlorosilane and belongs to the technical field of chlorosilane reduction. The problemsof harsh reaction conditions, low reaction speed and the like of chlorosilane reduction through CaH2 in the prior art are solved. In an organic solvent, under catalysis of a catalyst, calcium hydrideis used as a reducing agent, and chlorosilane is reduced into hydrogen silane; the catalyst is borane or borohydride or lithium aluminum hydride, and the organic solvent is tetrahydrofuran or diethylene glycol dimethyl ether or other ether solvents. The method can be applied to hydrogen silane preparation through chlorosilane reduction.

The invention discloses a polytetrafluoroethylene product surface treatment agent which comprises the following components in parts by weight: 50-280 parts of naphthalene, 10-50 parts of metallic sodium and 600-800 parts of a solvent, wherein the solvent is one of 1,4-dioxane, glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, ethylene glycol butyl methyl ether, tetraethylene glycol dimethyl ether and diethylene glycol isobutyl ether. The invention further provides a preparation method for the polytetrafluoroethylene product surface treatment agent. The polytetrafluoroethylene product surface treatment agent has the advantages of safety, environmental pollution and high treatment capability; and a polytetrafluoroethylene product obtained after treatment of the surface treatment agent is good in quality and high in qualified rate.

The invention provides a synthetic method for 2-amino-1,10-phenanthroline. The method comprises the following steps: in an aprotic solvent, subjecting 1,10-phenanthroline-2-one and alkyl sulfonyl chloride to sulfonylation in the presence of alkali so as to obtain 1,10-phenanthroline-2-sulfonate; and subjecting the obtained 1,10-phenanthroline-2-sulfonate without separation to heating reaction with ammonia water and then carrying out separating so as to obtain 2-amino-1,10-phenanthroline. The aprotic solvent used in the method may be toluene, xylene, dimethyl sulfoxide, diethylene glycol dimethyl ether or the like, the alkali may be triethylamine, 1-methyl piperidine, pyridine, sodium carbonate or the like, and the alkyl sulfonyl chloride may be p-methylbenzenesulfonyl chloride, benzenesulfonyl chloride, benzylsulfonyl chloride, methylsulfonyl chloride or the like, preferably, p-methylbenzenesulfonyl chloride.

A solvent for polystyrene resin treatment is used for reducing the volume of a polystyrene resin by contacting it with the solvent; and a method of treating polystyrene resins. The solvent is characterized by comprising 20 to 70 wt. % of diethylene glycol dimethyl ether and 30 to 80 wt. % of C9-13 aliphatic hydrocarbon. The method employs the solvent.

The invention discloses a halogen-free soldering flux for a high-activity tin wire. According to the soldering flux, refined hydrogenated rosin serving as a carrier is mixed with specific low-boiling-point solvent diethylene glycol dimethyl ether, surfactant cis-4-cyclohexene-1,2-dioctyl phthalate and nonionic surfactant twin-80. According to the halogen-free soldering flux, the soldering activity is greatly improved, metal oxide film can be effectively removed, and the soldering wettability can be improved; the soldering pad is prevented from being oxidized once again by adding the antioxidant vanilline, elements and parts are not corroded after soldering, the insulation resistance is high, and residues are prevented from turning black; residues are firm after the resin softener acetic acid,2-ethylhexyl ester and / or maleic acid di-n-butyl ester is added, and the appearance is bright and transparent. The halogen-free soldering flux can meet the requirement of automatic soldering and lead-free halogen-free soldering flux for solar energy.

Disclosed are processes of removing layers from substrates using fluorinated reactants having the formula MFx(adduct)n, wherein x ranges from 2 to 6 inclusive; n ranges from 0 to 5 inclusive; M is selected from the group consisting of P, Ti, Zr, Hf, V, Nb, Ta, Mo, and W; and the adduct is a neutral organic molecule selected from THF, dimethylether, diethylether, glyme, diglyme, triglyme, polyglyme, dimethylsulphide, diethylsulphide, or methylcyanide. The fluorinated reactants dry etch the nitride layers without utilizing any plasma.

The present invention discloses a preparation process of 1,1,1,3,3,3-hexachloropropane. Carbon tetrachloride, vinylidene chloride, solvent and catalyst are mixed and is subjected to addition reactionto produce, 1,1,1,3,3,3-hexachloropropane. In acetonitrile solvent, the molar ratio between carbon tetrachloride and vinylindene chloride is 2-5, and the reaction temperature is 120-150 deg.c. It is characterized by the catalyst including main catalyst copper chloride and cuprous chloride and cocatalyst isopropyl amine; the solvent including main solvent acetonitrile and cosolvent diethanediol dimethyl ether; and the reaction time of 4-6 hr. The present invention has short reaction time and high reaction yield.