19 results about "Undecylenates" patented technology

The invention provides a method for alcoholysis of polyethylene glycol terephthalate, and relates to the technical field of PET degradation. The PET alcoholysis method provided by the invention comprises the following steps: mixing PET, ethylene glycol, a cosolvent and a composite catalyst, and carrying out alcoholysis reaction to obtain bis (hydroxyethyl) terephthalate (BHET). According to the invention, dimethyl sulfoxide is taken as a cosolvent, zinc acetate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene are taken as a composite catalyst, catalysis and solvent effect driving are combined, and ethylene glycol alcoholysis of PET is carried out under the synergistic effect of the composite catalyst and the cosolvent. According to the method, effective decomposition of PET can be achieved at the low temperature (140-155 DEG C) and within the short reaction time (60-100 min), and the yield of BHET is high (66% or above and can reach 80% or above). The method provided by the invention can realize high-efficiency alcoholysis of PET with ethylene glycol.

The present invention relates to a process for the preparation of (4Z)-11,11-dialkoxy-4-undecenyl triaryl phosphonium halides of general formula (3-Z), wherein Y represents a halogen atom, Ar represents independently of each other an aryl group, R 1 and R 2 represent independently of each other a monovalent hydrocarbon group having 1 to 15 carbon atoms, or R 1 and R 2 may together form a divalent hydrocarbon group R 1 -R 2 having 2 to 10 carbon atoms, which process comprises: subjecting a (7Z)-11-halo-1,1-dialkoxy-7-undecene compound of general formula (1-Z), wherein X 1 represents a halogen atom, R 1 and R 2 are as defined above, to a phosphonium salt forming reaction with a phosphine compound of general formula (2), wherein Ar is as defined above, to form said compound (3-Z); and also relates to a compound of general formula (A) L(CH2)3CH=CH(CH2)5CH(OR 1 )(OR 2 )(A), wherein R 1 and R 2 are as defined above.

The invention discloses a lithium battery flame-retardant cellulose diaphragm and a preparation method thereof, and belongs to the technical field of modified cellulose.The cellulose diaphragm is prepared from flame-retardant cellulose through a papermaking method, and the flame-retardant cellulose is prepared by grafting cellulose with a monomer 1, a monomer 2, a monomer 3 and a monomer 4 through atom transfer radicals, the monomer 1 is an acrylate compound, the monomer 2 is a phosphaphenanthrene compound with an alkenyl group, the monomer 3 is obtained by reacting arginine with glycidyl methacrylate under an alkaline condition at 50-80 DEG C, and the monomer 4 is obtained by reacting bis (trihydroxymethyl) propane with 10-undecylenoyl chloride under the action of a catalyst. The monomer 1-4 is grafted on the main chain of the cellulose, so that the tensile strength and the thermal stability of the cellulose are improved, and the application prospect of the cellulose in the lithium battery diaphragm is improved.

The invention belongs to the technical field of natural perfume extraction, and particularly relates to a preparation method of trans-2, 4-undecadienal perfume, which is separated and extracted from coriander seeds, and comprises the following steps: step 1, pretreating raw materials, mixing and crushing coriander seeds and sunflower seeds to prepare mixed powder, and preparing a buffer solution; 2, carrying out enzymolysis reaction on the mixed powder to dissolve cell walls, and carrying out enzyme deactivation treatment to obtain a mixed precipitate; 3, performing low-temperature extraction on the mixed precipitate by using a solvent to obtain a mixed solution formed by mixing the solution and the essential oil; and step 4, treating the mixed solution by a column chromatography method to obtain the trans-2, 4-undecadienal perfume. According to the method, the sunflower seeds and the coriander seeds are jointly ground and reacted, so that the material flowability during crushing and enzymolysis can be effectively improved, and the sunflower seeds are rich in alpha-tocopherol which can be used as an antioxidant, so that trans-2, 4-undecylenal is prevented from being oxidized to the greatest extent in the extraction process.

The application relates to the technical field of polymer synthesis, in particular to an initiation / catalyst and a preparation method and application thereof, polylactic acid-poly(malic acid) and a preparation method and application thereof. The application provides an initiation / catalyst, and the preparation raw materials include 4-hydroxymethyl benzoic acid and 1,8-diazabicyclo[5.4.0]undec-7-ene. The initiation / catalyst has the advantage of weakened biological toxicity in biological medicine compared with a metal catalyst which is traditionally adopted.

The application belongs to the technical field of cis-jasmone synthesis, and relates to synthesis of a cis-jasmone intermediate, in particular to a preparation method of (Z)-undec-8-ene-2,5-dione. The preparation method comprises the following steps: acetylpropionyl halide and a dihydroxypyrimidine compound are used as starting materials, and (Z)-undec-8-ene-2,5-dione is prepared according to the following reaction route; a solution of (Z)-3-hexenyl magnesium bromide Grignard reagent is uniformly mixed with a solution of a compound shown in formula 3 under the condition of-15-15 DEG C, the temperature is increased to 15-45 DEG C, reaction is carried out for 1-3 hours, the temperature is decreased to 0-5 DEG C and the reaction is quenched, then the pH is adjusted to 1-3 and the temperature is increased to 15-45 DEG C, and reaction is carried out for 2-3 hours; wherein X1 is halogen, X2 is halogen, and R is H or methyl. The preparation method has the characteristics of easy-to-obtain starting materials, higher proportion of isomer Z configuration, simpler operation and the like, and is suitable for industrialized scale production.

The application relates to a polyimide film and preparation and application thereof, and belongs to the field of advanced functional materials. The preparation comprises the following steps: synthesizing a polyamide acid glue solution from a dianhydride, a diamine monomer and 1,8-diazabicyclo[5.4.0]undec-7-ene phenolate, then performing casting extrusion, solvent evaporation, a chemical cyclization bath, longitudinal stretching, transverse stretching and heat setting to obtain the polyimide film. The polyimide film prepared by the application has a compact and uniform structure and excellent comprehensive performance, and has important application prospects in the fields of artificial graphite heat-conducting films, electricians and electronics.

The invention belongs to the technical field of synthesis of cis-jasmone, and relates to synthesis of a cis-jasmone intermediate, in particular to a preparation method of (Z)-undec-8-ene-2, 5-diketone. Comprising the step of preparing (Z)-undec-8-ene-2, 5-diketone by taking acetyl propionyl halide and a dihydroxy pyrimidine compound as initial raw materials according to the following reaction route, the preparation method comprises the following steps: uniformly mixing a solution of a (Z)-3-hexene magnesium halide Grignard reagent with a solution of a compound shown in a formula 3 under the condition of-15 to 15 DEG C, heating to 15 to 45 DEG C, reacting for 1 to 3 hours, cooling to 0 to 5 DEG C, carrying out quenching reaction, then adjusting the pH value to 1 to 3, heating to 15 to 45 DEG C, and reacting for 2 to 3 hours; wherein X1 is halogen, X2 is halogen, and R is H or methyl. The preparation method provided by the invention has the characteristics of easily available raw materials, higher isomer Z configuration proportion, simpler operation and the like, and is suitable for industrial large-scale production.

This invention discloses a method for producing 4-hydroxy-2-pentanone from acetone and acetaldehyde, belonging to the field of fine chemical intermediate synthesis technology. The method uses bio-based acetone and bio-based acetaldehyde as raw materials, and 1,8-diazabicyclo[5.4.0]undec-7-ene as a catalyst. In a DBU-H₂O catalytic system, high-purity 4-hydroxy-2-pentanone is obtained through a cross-aldol condensation reaction followed by separation and purification. This invention solves the technical problems of low product yield, numerous by-products, dark product color, strong odor, and difficulty in catalyst recovery in existing technologies by optimizing reaction parameters and selecting specific catalysts. The reaction conditions are mild, the operation is simple, and the energy consumption is low. The catalyst can be recycled, and all raw materials are bio-based, meeting the requirements of green chemical development. It is suitable for large-scale industrial production, and the product can be widely used in bakelite preparation, flavorings, pharmaceutical intermediates, and other fields.

The invention belongs to the technical field of PET (polyethylene terephthalate) depolymerization catalysts, and relates to a method for generating BHET (butylated hydroxytoluene) by depolymerization based on a DBU-SiO2 catalyst, which comprises the following steps: adding waste PET and ethylene glycol into a depolymerization kettle for alcoholysis depolymerization reaction under the catalysis of an organic-inorganic hybrid nitrogen heterocyclic organic alkali loaded porous silica gel catalyst DBU-SiO2 to obtain a BHET monomer; the preparation process of the DBU-SiO2 comprises the following steps: adding silica gel into ethanol, stirring, adding 1, 8-diazacyclo [5.4. 0] undec-7-ene, carrying out heating reflux, and sequentially filtering, washing and drying to obtain the DBU-SiO2; the conversion rate of the PET polyester is 87.49 to 95.11 percent, and the yield of the BHET monomer is 76.84 to 80.03 percent. According to the method disclosed by the invention, the waste PET is depolymerized by adopting the DBU-SiO2 catalyst, so that the PET conversion rate and the BHET yield are remarkably improved.

The present invention discloses a flame-retardant cellulose separator for lithium batteries and a preparation method thereof, belonging to the technical field of modified cellulose. The cellulose separator of the present invention is prepared by a papermaking method from flame-retardant cellulose, and the flame-retardant cellulose is obtained by atom transfer radical grafting of cellulose with monomer 1, monomer 2, monomer 3, and monomer 4. Monomer 1 is an acrylate compound, monomer 2 is a phosphaphenanthrene compound with an alkenyl group, monomer 3 is obtained by reacting arginine with glycidyl methacrylate under alkaline conditions at 50-80°C, and monomer 4 is obtained by reacting bis(tris(hydroxymethyl))propane with 10-undecylenoyl chloride under the action of a catalyst. By grafting monomers 1-4 onto the cellulose main chain, the tensile strength and thermal stability of cellulose are improved, and its application prospect in lithium battery separators is enhanced.

The invention provides collagen composite gel for injection, and belongs to the technical field of biomedical materials. According to the invention, a modification method of the collagen is firstly constructed, the collagen with a specific sequence is mixed and then subjected to limited enzymolysis, a cross-linking reaction is carried out after enzyme deactivation, and the obtained collagen has better elasticity and proper viscosity. On the basis, sodium hyaluronate is dissolved in alkali liquor and reacts with 1, 4-butanediol diglycidyl ether and polyethylene glycol 400, and the modified sodium hyaluronate preparation is obtained. The collagen and the modified sodium hyaluronate are used as a skeleton, a cross-linking reaction is carried out in the environment of 1, 8-diazabicyclo [5.4. 0] undec-7-ene and fumaric acid, and the obtained collagen composite gel has a three-dimensional network structure and keeps good filling performance. Experimental verification shows that the collagen gel has remarkable collagen recovery capability, is good in filling performance and is not easy to calcify. The composition can be used for skin repair and regeneration.

The invention relates to an electrolyte additive and a preparation method thereof, and belongs to the technical field of electrolyte. The preparation method comprises the following steps: by taking allyl-1, 3-sultone as a raw material, carrying out Michael addition reaction on double bonds of the allyl-1, 3-sultone and amino groups of 4-amino-2-(trifluoromethyl) thiophene under the catalytic action of 1, 8-diazabicyclo-undec-7-ene to obtain an intermediate with a tertiary amine structure, and carrying out condensation reaction on the intermediate to obtain an intermediate with a tertiary amine structure; the preparation method comprises the following steps: carrying out a quaternary ammonium salt reaction on a tertiary amine structure of an intermediate and bromine atoms of ethyl bromoacetate to obtain an additive, and compounding the additive and a phosphate additive to obtain the electrolyte additive. Allyl-1, 3-sultone is used for modification, and fluoroalkyl is introduced, so that the intermolecular force is effectively reduced; the dependence of the electrolyte viscosity on the temperature is weakened, and the ionic conductivity of the electrolyte under the low-temperature condition is improved.

The invention provides natural protein shampoo based on an APG surface activity system and a preparation method of the natural protein shampoo, aims at solving the problems that effective microbial communities of existing shampoo are damaged, scalp barriers are damaged, and the anti-dandruff effect is not lasting, and provides a three-dimensional micro-ecological restoration framework of undecylenyl compounds, yeast zinc ZN100 and HA. The microecological friendliness is remarkably improved by targeted inhibition of malassezia proliferation and promotion of growth of scalp effective microbial communities, meanwhile, due to the synergistic effect of an APG surface activity system and undecylenoyl protein, excessive cleaning is avoided while efficient cleaning is guaranteed, a split-phase pre-dispersion and step-by-step cooling method is adopted in the preparation method, the pH value and the viscosity are accurately controlled, and the preparation method is simple and easy to implement. Different undecylenoyl protein different concentration difference formulas are provided according to different types of scalp requirements, the powerful dandruff removing and daily maintenance functions are considered, the shampoo is suitable for people of various scalp types, and the dandruff problem is fundamentally solved.

The invention provides a preparation method of (2S, 4R, 7R, 8R)-3, 3, 7, 11-tetramethyl tricyclo [6.3. 0. 02. 4] undec-1 (11)-ene, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: mixing (1R, 2S, 8R, 11R)-7-methylene-3, 3, 11-trimethyltricyclo [6.3. 0. 02. 4] undecane with a catalyst, and carrying out an isomerization reaction under the conditions of hydrogen and pressurization to obtain (2S, 4R, 7R, 8R)-3, 3, 7, 11-tetramethyltricyclo [6.3. 0. 02. 4] undec-1 (11)-ene. A chemical synthesis method is adopted for preparation, the problem that a target product can only be extracted from natural plants is solved, and the method is environmentally friendly, efficient and free of three industrial wastes.

The invention relates to a polyimide film and preparation and application thereof, and belongs to the field of advanced functional materials, and the preparation method comprises the following steps: synthesizing a polyamide acid glue solution from dianhydride, a diamine monomer and 1, 8-diazabicyclo [5.4. 0] undec-7-alkenylphenate, and then carrying out tape casting extrusion, solvent evaporation, chemical cyclization bath, longitudinal stretching, transverse stretching and heat setting to obtain the polyimide film. The polyimide film is obtained. The prepared polyimide film is compact and uniform in structure and excellent in comprehensive performance, and has important application prospects in the fields of artificial graphite heat conduction films, electrician and electronics and the like.

The present invention discloses a skin moisturizing and anti-dandruff composition and a preparation method thereof, and relates to the field of moisturizing and anti-dandruff composition equipment, the skin moisturizing and anti-dandruff composition comprises an anti-dandruff component, a moisturizing component, a conditioner, a functional component, a basic component and an additive, the anti-dandruff component comprises sorbitol and undecylenamide propyl trimethyl ammonium methyl sulfate, the moisturizing component comprises a spiderflower leaf extract, a mangosteen peel extract and a coastal eryngii extract, the functional component comprises a conditioner, a zinc compound and an amino acid compound, and the basic component and the additive comprise water, a preservative and essence. The spiderflower leaf extract, the mangosteen peel extract and the coastal eryngii extract in the skin moisturizing and dandruff removing composition are optimally designed according to the dandruff removing and moisturizing requirements of scalp and skin, the scalp environment can be improved, the scalp barrier can be repaired, and the water-oil balance of the scalp and the skin can be promoted.

The invention belongs to the technical field of oil-gas field development, and particularly relates to an integrated clean variable-viscosity fracturing fluid thickener as well as a preparation method and application thereof. The thickening agent is prepared from the following raw materials through polymerization reaction: 16 to 20 parts of acrylamide, 5 to 8 parts of 1-[2-[(1-oxoundec-10-alkenyl) amino] ethyl] 2-sulfonic acid disodium succinate, 3 to 5 parts of tert-butyl-[2-hydroxy-3-[4-(3-oxobutyl-1-ene-2-yloxy) phenoxy] propyl] ammonium bromide, 40 parts of water, 40 to 60 parts of white oil and an emulsifier which accounts for 3 to 5 percent of the mass of the white oil. By reasonably selecting raw material components and optimizing a preparation process, the integrated clean variable-viscosity fracturing fluid thickening agent with functional groups such as amido bonds, benzene rings, carboxylic acid groups, sulfonic acid groups, hydroxyl groups and ammonium groups is successfully prepared; through the synergistic effect of all functional groups, the integrated functions of temperature resistance, salt resistance, tackifying, resistance reduction, sand carrying and low cleaning damage are achieved, the preparation process is stable and controllable, industrial production is easy, and wide application prospects are achieved in unconventional oil and gas field development.

The application discloses an organic-metal skeleton / FeS composite photocatalytic material and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving soluble zirconium salt and 2,5-dimercaptoterephthalic acid into a mixed solution of glacial acetic acid and N,N-dimethylformamide and uniformly mixing; performing first solvothermal reaction on the prepared solution to prepare UiO-66-SH2; adding UiO-66-SH2 and 1,8-diazabicyclo[5.4.0]undec-7-ene into an N,N-dimethylformamide solution of FeSO4 and stirring and reacting at room temperature; adding thiourea into the reacted solution to perform second solvothermal reaction, thereby obtaining the UiO-66-S-FeS-x photocatalytic material. The prepared photocatalytic material has good photocatalytic performance, and when applied to photocatalytic degradation of tetracycline in water, the degradation rate of tetracycline reaches more than 99% after irradiation for 120 min under visible light (300W xenon lamp, greater than or equal to 400nm).