9 results about "Acetylenic acid" patented technology

The invention belongs to the technical field of functional material preparation and catalysis, and provides a defective Cu (I)-based organic framework material, a preparation method thereof and application of the defective Cu (I)-based organic framework material in catalysis of carboxylation reaction of carbon dioxide. By regulating and controlling defects of different proportions, a series of novel Cu (I)-based defective organic frameworks rich in metal and Lewis alkali multi-element active sites are constructed by adopting a one-pot method; as a catalyst, in a reaction for synthesizing an acetylenic acid compound through carboxylation of carbon dioxide and aromatic alkyne with different substituent groups, synthesis of high-selectivity catalytic acetylenic acid under a normal pressure condition is realized. The organic framework material is easy to separate, the catalytic activity is not obviously reduced after the organic framework material is recycled for five times, the organic framework material has a stable structure and excellent adsorption and catalytic conversion dual functions on carbon dioxide, the problem that a current catalytic system is poor in comprehensive performance in the aspects of catalytic activity, stability, separation and reuse and the like is solved, and the organic framework material has a wide application prospect.

This invention relates to the field of chemical synthesis technology, and more particularly to a catalyst for the synthesis of alkyl alkynyl acids or alkyl alkynyl esters and a method for their preparation. The catalyst used in this invention for the synthesis of alkyl alkynyl acids or alkyl alkynyl esters is Ag. x Fe y The catalyst has a silver to iron molar ratio of 9:1 to 1:1, preferably 5:1 to 1:1, and the support is an oxide and / or a molecular sieve. The catalyst of this invention can efficiently convert CO2 into alkyl alkynyl acids or alkyl alkynyl esters under mild conditions, which is of significant research importance.

The application discloses a preparation method of a pyrrolidone derivative. Under the action of a non-precious bimetallic multifunctional catalyst, an acetylenic acid derivative shown in formula I is reacted with an amine, a nitro compound or a nitrile compound shown in formula II in a reaction solvent under the heating and stirring of hydrogen gas to prepare a pyrrolidone derivative shown in formula III, and a reaction formula is as follows: the non-precious bimetallic multifunctional catalyst is a nitrogen-doped carbon-based carrier NC derived from a metal-organic framework material ZIF-8 and an effective active ingredient embedded on the carrier NC; the effective active ingredient comprises two metals, one metal is Co, and the other metal is any one of Ni or Cu. The yield of the pyrrolidone derivative synthesized by the method can reach 77% to 100%. The method has the advantages of simple process, high selectivity of the target product, cleanness and environmental protection, small catalyst consumption, low cost, simple catalyst preparation, high catalytic stability and suitability for industrial production.

The present application relates to the field of petroleum component separation, discloses a kind of composition, eutectic solvent and its preparation method and application, the method for extracting and separating aromatic hydrocarbon in petroleum fraction.A kind of composition, the composition includes 1-ethyl pyridine chloro salt and acetylenic acid;Wherein, the molar ratio of 1-ethyl pyridine chloro salt and acetylenic acid is 0.5-5:1.The eutectic solvent prepared by the specific composition disclosed in the present application is used to extract and separate aromatic hydrocarbon in petroleum fraction, and there is basically no solvent residue in the raffinate obtained, the subsequent aromatic hydrocarbon separation method is simple, the extraction effect is obviously improved;And compared with the existing commonly used extraction solvent, it has higher aromatic hydrocarbon selectivity.

The invention belongs to the technical field of adhesive preparation, and particularly relates to a recyclable aziridine propionate adhesive as well as a preparation method and application thereof. The recyclable aziridine propionate adhesive is prepared from the following raw materials in parts by weight: 40 to 50 parts of aziridine propionate monomers; 20-25 parts by weight of an olefine acid monomer and 20-25 parts by weight of an acetylenic acid monomer. According to the recyclable adhesive provided by the invention, aziridine propionate monomers are taken as a matrix, olefine acid monomers and acetylenic acid monomers are added to generate dynamic bonds, the network density of a polymer is improved, hydroxyl is introduced into the matrix, so that the content of hydrogen bonds is increased, and the deformation resistance of the adhesive is improved; the problem of low bonding strength of aziridine propionate adhesives in the prior art is solved.

The invention discloses a method for synthesizing a pyranone derivative by using a 1, 3-dicarbonyl compound and acetylenic acid ester, and belongs to the technical field of organic synthesis. The synthesis method comprises the following steps: reacting a 1, 3-dicarbonyl compound I, an acetylenic acid ester compound II, a catalyst and an alkaline substance in a solvent to obtain the compound. According to the present invention, the 1, 3-dicarbonyl compound and the acetylenic acid ester are utilized to synthesize the pyranone derivative, the preparation method has characteristics of simple operation, safety, cheapness, efficient preparation of the pyranone compound, and compared with the existing synthesis technology, the pyranone compound can be suitable for a large number of functional groups, and further has advantages of simple operation, high yield, single product structure, and easy industrial production. The method is convenient to separate and purify, safe, low in cost, small in pollution and suitable for large-scale industrial production, and the problems that an existing pyranone derivative synthesis method needs an active reaction substrate, the reaction efficiency is low, the reaction time is long, many by-products are difficult to treat, and the reaction form is too single are solved.

The invention discloses a synthesis method of (2E, 4Z)-2, 4-decadienoic acid ethyl ester, and belongs to the technical field of perfume synthesis. Comprising the following steps: 3-octyne-1-alcohol is oxidized by ephedrine to obtain 2-octyne aldehyde; the preparation method comprises the following steps: carrying out aldol condensation on 2-octyne aldehyde and malonic acid, and carrying out decarboxylation reaction to obtain E-dec-2-ene-4-acetylenic acid; carrying out esterification reaction on the obtained carboxylic acid to obtain E-dec-2-ene-4-acetylenic acid ethyl ester; and carrying out cis-reduction on the eneynoic acid ester to obtain the (2E, 4Z)-2, 4-decadienoic acid ethyl ester. The synthesis method has the advantages of simplicity in operation, few three wastes and high selectivity, the yield and the product quality are guaranteed, and the synthesis method is more suitable for industrial large-scale production.

The application relates to application of a Bi2S3 / Bi2O4 composite material in catalytic hydrogenation synthesis of gamma-valerolactone from acetylenic acid. A composite catalytic material Bi2S3 / Bi2O4 of bismuth sulfide and bismuth tetroxide is prepared by using bismuth nitrate pentahydrate and sodium thiosulfate as raw materials and by adopting a solvothermal method. The composite Bi2S3 / Bi2O4 material, a substrate acetylenic acid and an alcohol solvent (a hydrogen donor) are added into a quartz test tube, and the photocatalytic reaction of the acetylenic acid is completed under an argon atmosphere and illumination, so that the yield of the product gamma-valerolactone can reach 81% after 37 hours of reaction, and a high product yield is realized under mild reaction conditions.

Disclosed are a halogen-free flame-retardant glass fiber reinforced nylon material, and a preparation method therefor and the use thereof. The halogen-free flame-retardant glass fiber reinforced nylon material comprises 45-85 parts by weight of nylon, 10-55 parts by weight of glass fibers, 2-10 parts by weight of a phosphate flame retardant and 0.01-2 parts by weight of a terminal acetylenic acid ester modifier. The glass fibers and the phosphate flame retardant are bonded together by adding the terminal acetylenic acid ester modifier, which facilitates improving the candlewick effect in the glass fiber reinforced nylon material, and can also increase the compatibility of the nylon, the glass fibers and the flame retardant, such that the glass fiber reinforced nylon material having a very good flame retardant property can be obtained with a relatively low addition amount of the phosphate flame retardant without affecting the mechanical properties of the glass fiber reinforced nylon material itself, and finally, the halogen-free flame-retardant glass fiber reinforced nylon material having good flame retardant and mechanical properties is obtained.