78 results about "Diglyme" patented technology

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.

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.

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 R1 is selected from the group composed as follows.

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 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 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.