6 results about "Phenyl acetic acid" patented technology

The invention discloses a method for detecting the content of p-aminophenylacetonitrile in felbinac, which adopts a triple quadrupole liquid chromatography-mass spectrometry method, takes formic acid-methanol-water with different volume ratios as a mobile phase, adopts a multi-reaction monitoring mass spectrometry mode, and researches liquid chromatography and mass spectrometry conditions to determine the content of p-aminophenylacetonitrile in felbinac. The detection of trace p-aminophenylacetonitrile impurities in the felbinac is realized. The method has good accuracy, precision, stability and specificity, and can effectively control the content of p-aminophenylacetonitrile in the biphenylacetic acid, thereby ensuring the quality of the ibuprofen product taking the biphenylacetic acid as the raw material.

The invention belongs to the technical field of carbon capture, and discloses an organic amine absorbent suitable for cement kiln flue gas carbon capture and a preparation method and application thereof.The organic amine absorbent is prepared from, by mass, 3.0-6.0 parts of a main agent, 1.0 part of an auxiliary agent, 0.1-0.5 part of an accelerant and 0.1-0.5 part of a stabilizer, the main agent comprises diamine, the auxiliary agent comprises tertiary amine, the accelerant is 1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 the catalyst is one or more of 1, 3, 5-tri-tert-butylbenzene, tert-butyl acetate, triphenylcarbinol and triphenylphosphine. According to the invention, high-temperature degradation resistance and impurity selective adsorption can be considered, and the problems of insufficient high-temperature stability and lack of impurity interference resistance of an organic amine absorbent in the prior art are solved at the same time.

The invention discloses an MOF (Metal Organic Framework) capable of being used for preparing ammonia by electroreduction of a nitrate-containing solution and a preparation method, and belongs to the technical field of nano materials. Comprising the following steps: firstly, treating carbon cloth with a saturated potassium permanganate solution; then adding an organic ligand 2, 3, 6, 7, 10, 11-hexahydroxy triphenylene and cobalt acetate monohydrate into deionized water and N-methyl pyrrolidone, and carrying out ultrasonic treatment to fully disperse the solid medicine in the solution; obliquely putting the pretreated carbon cloth into the mixed solution, transferring into a reaction kettle, carrying out hydrothermal treatment, repeatedly cleaning the surface of the carbon cloth by using deionized water and absolute ethyl alcohol, and drying to obtain the MOF capable of being used for preparing ammonia by electroreduction of a nitrate-containing solution. According to the method, bismuth chloride can also be added into the organic ligand 2, 3, 6, 7, 10, 11-hexahydroxy triphenylene and cobalt acetate monohydrate to prepare Bi-doped MOF. The invention aims to provide the method for preparing the MOF which can be used for preparing the ammonia by electroreduction of the nitrate-containing solution, can be massively produced, has uniform morphology and can be used for preparing the ammonia by electroreduction of the nitrate-containing solution under a hydrothermal condition.

The application belongs to the technical field of carbon capture, and discloses an organic amine absorbent suitable for carbon capture of cement kiln flue gas, and a preparation method and application thereof. The organic amine absorbent comprises the following components in mass fraction: 3.0-6.0 parts of a main agent, 1.0 parts of an auxiliary agent, 0.1-0.5 parts of a promoter, and 0.1-0.5 parts of a stabilizer. The main agent comprises a binary amine, the auxiliary agent comprises a tertiary amine, and the promoter is one or more of 1,3,5-tri-tert-butylbenzene, tert-butyl acetate, triphenyl carbinol and triphenyl phosphine. The application can take into account high-temperature degradation resistance and selective adsorption of impurities, and simultaneously solves the problems of insufficient high-temperature stability and lack of anti-impurity interference ability of the organic amine absorbent in the prior art.

The application relates to the technical field of thermal insulation materials, and discloses a flame-retardant modified thermal insulation foam material and a preparation process thereof. The flame-retardant modified thermal insulation foam material is prepared from low-density polyethylene as a main material and 3,5-di-tert-butyl-4-hydroxyphenyl acetic acid grafting material and the like as auxiliary materials. Silicon phosphorus boron in the hydroxyl-terminated polydimethylsiloxane grafting material serves as a flame-retardant element, a dense thermal insulation oxygen isolation silicon phosphorus boron composite carbon layer is constructed at high temperature, and the flame-retardant effect is achieved. After 3,5-di-tert-butyl-4-hydroxyphenyl acetic acid is grafted to carboxyl-terminated polybutadiene, the antioxidant unit is fixed on the flexible long chain of the carboxyl-terminated polybutadiene through chemical bonding, the antioxidant activity of the antioxidant unit is retained, and the agglomeration phenomenon is inhibited, so that the flame-retardant modified thermal insulation foam material prepared by the application has the flame-retardant, antioxidant and thermal insulation performances.

The application discloses a preparation method of 5-cyanoindole, S1) o-chloroaniline and dimethyl malonate are dissolved and subjected to catalytic reaction to prepare dimethyl 2-(2-aminophenyl)malonate; S2) dimethyl 2-(2-aminophenyl)malonate is dissolved, hydrolysis reaction is carried out by adding alkali, and then high-temperature decarboxylation reaction is carried out by adding acid to prepare o-aminophenylacetic acid; S3) o-aminophenylacetic acid is dissolved and subjected to amino para-bromination to prepare 2-(2-amino-5-bromophenyl)acetic acid; S4) 2-(2-amino-5-bromophenyl)acetic acid is dissolved, and intramolecular condensation is carried out by adding a condensing agent to prepare 5-bromo-oxindole; S5) 5-bromo-oxindole is subjected to reduction reaction to prepare 5-bromoindoline; S6) 5-bromoindoline is subjected to oxidation reaction to prepare 5-bromoindole; and S7) substitution reaction is carried out on the bromine of 5-bromoindole by using cyano to prepare 5-cyanoindole. The application has the advantages of simple process, environmental protection, no pollution, low cost, safe operation, easy scale production, mild reaction condition, high conversion rate and good product quality.