64 results about "Propionaldehyde" patented technology

[Problem] To provide a means capable of more efficiently exerting an antibacterial effect against bacteria. [Solution] An antibacterial agent containing at least two compounds selected from the group consisting of trans-2-methyl-2-pentenal, 2-methylbutanal, trans-2-hexenal, propionaldehyde, 3-methylpentanol, and 2,5-dimethylfuran.

A method for controlling a chemical process, by preparing methanol, hydrogen sulfide, methyl mercaptan, hydrocyanic acid, acrolein, 3-methylthiopropionaldehyde, 5-(2-methylmercaptoethyl)-hydantoin, methionine, a salt of methionine, and a derivative of methionine. The method includes providing a training set TS1, wherein TS1 is process values PV1 and process values PV2 being correlated to one another, and / or laboratory values LV1 and process values PV2 being correlated to one another. The method includes training a processing unit on the training set TS1 to identify a pattern of correlation between one or more measured process variables and at least one process variable. The method includes developing a calibration function CF1 for a calibrated soft sensor from the identified pattern of correlation and predicting at least one operating parameter for the chemical process as an approximation to LV1 and / or PV1. A system for controlling a chemical process.

This invention provides a 1,3,5-triarylbenzene compound and its preparation method, which involves uniformly mixing α,β-unsaturated ketones, 2-phenylpropanal, and elemental iodine, followed by heating to react, thereby obtaining the compound. Compared with existing technologies, this invention has the following advantages: the reaction conditions are mild, the method is simple and rapid, and the substrate applicability is wide, which is beneficial for industrial production. Furthermore, the structure of the prepared 1,3,5-triarylbenzene compound is more complex and diverse.

This invention belongs to the field of organic synthesis technology and relates to a precursor of an obisec key intermediate and a method for preparing the key intermediate. The method involves a [4+2] cycloaddition reaction of 4-trifluoromethylaniline, propionaldehyde, and N-vinylformamide under the catalysis of chiral phosphoric acid, yielding the obisec key intermediate precursor with high enantioselectivity. N -((2) R 4 S )-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinoline-4-yl)formamide; subsequently, the key intermediate of obisetri can be obtained through a deprotection reaction under acidic conditions. The method provided by this invention uses a small amount of chiral catalyst and commercially available reagents to efficiently obtain the key intermediate of obisetri in just two steps. R 4 S )-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinoline-4-amine; under mild conditions without the need for chiral resolution, the utilization of starting materials is greatly improved, thereby significantly increasing the yield of the target product and the economic efficiency of the process.

This invention provides the application of compounds in attracting or controlling midges, relating to the field of midge control technology. Through screening and identification, this invention has obtained five compounds (butyric acid, butyraldehyde, propionaldehyde, 2-hexanone, and acetophenone) with significant attractant activity against Formosan midge. These compounds can be used alone or in combination, are environmentally friendly and have a high affinity for non-target organisms, greatly enriching the candidate resource of midge attractants. They can be directly applied to the monitoring and large-scale trapping of midges, effectively reducing midge population density, thereby reducing midge bites and the spread of midge-borne diseases, which has significant public health implications.

The application provides a black fungus provenance characteristic molecular marker and application thereof, and the molecular marker comprises the following: the molecular marker 2-acetyl furan, beta-pinene and 2-pinene of Shaanxi black fungus; the molecular marker 2-propanol and 2, 6-dimethyl pyrazine of Heilongjiang black fungus; the molecular marker pentanal and 2-butanone of Jilin black fungus; the molecular marker n-hexanal and acetic acid of Zhejiang black fungus; and the molecular marker 2-methyl propionaldehyde and hexanoic acid of Fujian black fungus. The molecular marker can be used for identifying the provenance of black fungus. The application first provides the provenance characteristic molecular marker of black fungus, the molecular marker can replace all chemical components of black fungus and serve as a detection basis of the provenance of black fungus; compared with existing black fungus physical and chemical indexes and artificial sensory recognition analysis, the provenance characteristic molecular marker of black fungus provided by the application improves the accuracy and recognition rate of detection, and provides a simple, rapid and effective scheme for provenance identification of black fungus.

The present invention provides a method for producing liquid methionine or methionine, and particularly provides a method for producing liquid methionine or methionine by condensation reaction of 3-hydroxypropionaldehyde and formyl-CoA derived from a C1 substrate. The present invention also provides a genetically engineered microorganism for the production of liquid methionine or methionine.

The application discloses a preparation method of butanediamine, which comprises the following steps: synthesizing cyanopropyl aldehyde by adopting synthesis gas and acrylonitrile, and then performing ammoniation hydrogenation on the cyanopropyl aldehyde to produce 1,3-butanediamine and 1,4-butanediamine in a combined manner. According to the synthesis route, the total yield of the product butanediamine is greater than or equal to 95%, and compared with the hydrocyanic acid method, the ammoniation hydrogenation catalyst has the advantages of low single consumption and low total production cost of the product.

The invention discloses a method for preparing 1, 3-propylene glycol based on catalysis of a copper complex, and relates to the technical field of catalytic hydrogenation of aldehyde. According to the method, the problems of high reaction temperature and poor selectivity in the prior art are solved, the reaction process is simple, the yield of 1, 3-propylene glycol is high, and the selectivity is good; a cheap copper catalyst phosphine ligand is used, so that the cost is relatively low; the reaction conditions are mild, the temperature and the pressure are relatively low, and the requirement on production equipment is not high; the reaction system is wide in application range; the 1, 3-propylene glycol is prepared by hydrogenation of the 3-hydroxypropionaldehyde, the method is milder and quicker, and the method is also suitable for hydrogenation reaction of other aldehyde substances.

The invention relates to a preparation method of a hydrogenation catalyst suitable for preparing n-propyl alcohol through liquid-phase hydrogenation of propionaldehyde, which comprises the following steps: S1, preparing a precursor solution: dissolving sodium carbonate in deionized water to prepare a mixed nitrate solution with the total metal ion concentration of 0.8-1.2 mol / L, and dissolving sodium carbonate in desalted water to prepare a sodium carbonate solution as a precipitator; s2, co-precipitation reaction: under a stirring condition, adding the mixed nitrate solution and a precipitant into a reaction kettle at the same time to obtain a precipitate, and after the precipitate is fully aged, removing foreign ions in the precipitate; s3, drying and roasting: drying the precipitate, and roasting in an air atmosphere to obtain composite oxide powder; s4, molding: preparing the composite oxide powder into cylindrical catalyst particles; and S5, secondary drying and roasting: carrying out drying treatment and roasting treatment on the cylindrical catalyst particles to obtain a final catalyst product.

A filtration device for propionaldehyde industrial wastewater, relating to the field of industrial wastewater treatment, includes a filter box, a filter screen, and a liquid suction mechanism. The filter screen is located inside the filter box, and the liquid suction mechanism is located on top of the filter box. The liquid suction mechanism includes a guide rod, a float plate, and a discharge pump. A top plate is provided on the top of the filter box, the guide rod slides through the top plate, the float plate is located at the bottom of the guide rod, and a suction nozzle is located at the bottom of the float plate. The discharge pump is located on the top plate, and the suction nozzle is connected to the discharge pump via an outlet pipe. This invention discharges propionaldehyde wastewater into the filter box, where it passes through the filter screen under its own gravity, resulting in more stable filtration pressure. The filtered propionaldehyde liquid is transferred through the suction nozzle to the outlet pipe and finally discharged, achieving stable pressure filtration of the propionaldehyde wastewater and resulting in a more uniform filtration degree.

The present invention specifies an unpleasant odor, which is a semi-dry odor generated by a fibrous product such as clothing, towels, bedding, and the like, and provides a perfume composition, a common consumer product, and the like, which are capable of reducing the unpleasant odor. The perfume composition according to the present invention can exert a deodorizing (masking) effect on unpleasant odors, which are half-dry odors, by containing, as a masking active ingredient, one or more compounds selected from the group consisting of 3-(4-tert-butylphenyl) propionaldehyde, 3-tricyclo [5.2. 1.02, 6] deca-3-alkenyl acetate, 3-(4-ethylphenyl)-2, 2-dimethylpropionaldehyde, ethyl 2-cyclohexyl propionate, and the like.

The invention relates to the technical field of chemical synthesis, in particular to a synthesis method of matrichthrin, which comprises the following steps: S1, under an alkaline condition, carrying out aldol condensation reaction on propionaldehyde to obtain a first reaction mixture containing 2-methyl-2-pentenal; s2, in the presence of a hydrogenation catalyst, 2-methyl-2-pentenal in the first reaction mixture obtained in the step S1 is subjected to a hydrogenation reaction, and a second reaction mixture containing 2-methylvaleraldehyde is obtained; s3, in the presence of an oxidation catalyst, 2-methylvaleraldehyde in the second reaction mixture obtained in the step S2 and oxygen or oxygen-containing gas are subjected to an oxidation reaction, and a third reaction mixture containing 2-methylvaleric acid is obtained; and S4, in the presence of an esterification catalyst and a water-carrying agent, carrying out esterification reaction on the 2-methylvaleric acid in the third reaction mixture obtained in the step S3 and ethanol to obtain matrichthrin. The requirement for supplementing manganese acetate is remarkably reduced, and the production cost is reduced.

The invention discloses an aldolase mutant and application thereof in production of 3-hydroxypropionaldehyde, and relates to the technical field of enzymes. The invention provides an aldolase mutant. The amino acid sequence of the aldolase mutant is as shown in SEQ ID NO: 1. The enzyme activity of the aldolase mutant constructed by the invention is 79 times that of a wild type, and the yield of 3-hydroxypropionaldehyde produced by aldolase is greatly increased. The aldolase mutant has improved comprehensive catalytic efficiency on substrates formaldehyde and acetaldehyde after modification. On the basis of the mutant, yqhD gene knockout is carried out on an expression host, the substrate conversion rate is obviously increased, the formaldehyde conversion rate is increased by 28.20%, the acetaldehyde conversion rate is increased by 30.41%, and the mutant has wide application prospects and high industrial value in biosynthesis of 3-hydroxypropionaldehyde.

The present application relates to the technical field of catalyst, and discloses a method for preparing a supported catalyst by using alkaline gas, the supported catalyst and application thereof, which comprises the following steps: (1) contacting a solution containing active component precursor and inorganic alkaline substance with a carrier to obtain a solid-liquid mixture; the active component precursor comprises a noble metal precursor; (2) drying the solid-liquid mixture in the presence of a first alkaline substance to obtain a solid product; (3) then activating the solid product in the presence of a second alkaline substance; wherein the first alkaline substance and the second alkaline substance are independently nitrogen-containing alkaline substances. The catalyst has a low acid amount and a B acid / L acid acid amount ratio, and when used in a propylene epoxidation reaction, can significantly reduce the selectivity of by-products propyl aldehyde and acetone, while obtaining a higher propylene conversion rate and propylene oxide selectivity.

The invention relates to the technical field of production of a chemical reagent dipentaerythritol, and discloses a method for improving the yield of dipentaerythritol, which comprises the step of adding monopentaerythritol which accounts for 50-150% of the molar mass of acetaldehyde when the condensation reaction of formaldehyde and acetaldehyde begins. Under the catalysis of strong base, formaldehyde and acetaldehyde firstly generate 3-hydroxypropionaldehyde, and the intermediate is dehydrated to form acrolein. According to the invention, the mono-pentaerythritol is added at the initial stage of the reaction, so that the acraldehyde and the mono-pentaerythritol are subjected to addition reaction to directly form a skeleton structure of the dipentaerythritol, thereby bypassing part of competitive reaction, and greatly improving the generation efficiency of the dipentaerythritol. Specifically, the yield of the dipentaerythritol in the scheme can be increased from 10% to 23%.

The application discloses a carboxylic resin catalyst for preparing 3-hydroxypropionaldehyde by hydrating propenal and a preparation method and application thereof, and relates to the technical field of catalysts. The resin is first swelled, then a cage cavity structure organic matter is added for pore filling and reconstruction, then a Friedel-Crafts acylation and amination are carried out to graft an amino carboxylic acid group, and finally an H type resin catalyst is obtained through acidification. The resin catalyst has stable pore structure and high active site abundance, and when used for a propenal hydration reaction, the space velocity can reach 5h ‑1 , the propenal conversion rate is greater than or equal to 75%, the 3-hydroxypropionaldehyde selectivity is greater than 93%, and after a tubular fixed bed reaction continuous evaluation for 100 hours, the decrease ranges of the propenal conversion rate and the 3-hydroxypropionaldehyde selectivity are less than 2%, and the catalytic performance and stability are significantly improved.

The invention relates to the field of chemical synthesis of insect sex pheromones, in particular to a preparation method of codling moth sex pheromones. The method comprises the following steps: in N2 atmosphere, taking anhydrous THF as a solvent, reacting 7-chloroheptyltrimethylsilyl ether with sodium acetylene to prepare an intermediate (I), and reacting the intermediate (I) with halide salt and propionaldehyde to generate an intermediate (II); and reducing the intermediate (II) by using LiAlH4 / anhydrous AlCl3, and carrying out acid hydrolysis to obtain the codling moth sex pheromone (8E, 10E)-dodecadiene-1-alcohol. The method disclosed by the invention is mild in reaction condition, simple in post-treatment, environment-friendly, high in product yield and purity and suitable for industrial production.

The present application relates to the recombinant microorganism for producing 3-amino propanol by fermentation method and its construction method and application. Specifically, the present application provides a construction method of the recombinant microorganism for producing 3-amino propanol, which is introducing the coding gene of omega-transaminase into the microorganism producing 3-hydroxy propionaldehyde, wherein the omega-transaminase can catalyze the conversion of 3-hydroxy propionaldehyde into 3-amino propanol in the presence of amino donor. The present application introduces the omega-transaminase capable of catalyzing the synthesis of 3-amino propanol with 3-hydroxy propionaldehyde as the substrate into the microorganism producing 3-hydroxy propionaldehyde based on gene editing, molecular cloning and other technologies, which first creates a brand new full-path biosynthesis process route of 3-amino propanol.

The present disclosure relates to a novel variant polypeptide having propionaldehyde dehydrogenase activity; a polynucleotide encoding the variant polypeptide; a microorganism comprising the variant polypeptide, a polynucleotide encoding the variant polypeptide, or a vector containing the polynucleotide; and a method for producing 3HP-CoA or derivatives thereof, comprising the step of culturing the microorganism in a medium.

The invention discloses preparation and application of an Au / S-1 catalyst for oxidative esterification, the catalyst takes a pure silicon molecular sieve S-1 as a carrier, the hydrophobicity of the carrier can be improved through silanization treatment, and methanol and propionaldehyde are enriched by enhancing the adsorption effect of organic matters and the catalyst, so that the catalytic activity of the catalyst is improved. The interaction between gold and S-1 can be effectively enhanced, the size of the gold nanoparticles is controlled to be 2-5 nm, contact between reactants and active sites is facilitated, and the center utilization rate of gold is increased; meanwhile, a complexing agent is added for modification, a protection effect on the gold particles is achieved, the stability of the gold particles is enhanced, the catalytic activity is improved by modifying the catalyst, and the method has great industrial production value.

The patent discloses a preparation method of Mo-V-Sb-Na-O composite oxide catalyst and application of the Mo-V-Sb-Na-O composite oxide catalyst in a reaction of preparing acrylic acid from propylene aldehyde, and comprises the following steps: using a solvent evaporation method to prepare a Mo-V series catalyst, dissolving ammonium heptamolybdate, ammonium metavanadate and antimony trioxide in deionized water and uniformly mixing under rapid stirring, and drying and calcining the mixed liquid to obtain a high-activity catalyst for selectively oxidizing propylene aldehyde into acrylic acid, i.e. a composite oxide catalyst. The composite oxide catalyst prepared by the above method has the advantages of simple operation process, short preparation time, good selectivity and yield of acrylic acid.

The present invention relates to compounds of formula (I) in the form of any one of their stereoisomers, regioisomers or mixtures thereof. The use of the compounds of formula (I) as floral-type perfuming ingredients and the present compounds as part of a perfuming composition or of a perfuming consumer product are also part of the present invention.

A process for manufacturing one or more ethylene-derived chemicals having a bio-based carbon content, comprising the steps of: (a) providing a first ethylene stream by (a-i) providing a cracker feed stream comprising pyrolysis oil and fossil-based hydrocarbons, (a-ii) subjecting the cracker feed to steam cracking to obtain a cracker effluent, (a-iii) recovering the first ethylene stream from the cracker effluent; (b) providing a second ethylene stream having a bio-based carbon content; (c) combining the first ethylene stream and the second ethylene stream to obtain a combined ethylene stream; (d) converting the combined ethylene stream to at least one first generation ethylene-derived chemical selected from the group consisting of: (alpha) ethylene oxide, (beta) ethylbenzene, (gamma) ethylene dichloride; and (delta) propionaldehyde; and (e) optionally subjecting the first generation ethylene-derived chemical to a chemical conversion or a series of chemical conversions to obtain a downstream ethylene-derived chemical. The process allows for efficient operation of the steam cracker while allowing for the production of ethylene-derived chemicals having a predetermined bio-based carbon content.

A process for concurrently producing methacrylic acid and methyl methacrylate comprising: a) producing methacrolein from propionaldehyde and formaldehyde; b) splitting the methacrolein into a first methacrolein stream and a second methacrolein stream; c) producing methacrylic acid in an oxidative reaction from water and the first methacrolein stream; and d) producing methyl methacrylate in an oxidative esterification reaction from methanol and the second methacrolein stream.

Described herein is a composition including 3-(4-isopropyl-2-methylphenyl)propanal and 3-(2-isopropyl-4-methylphenyl)propanal, which are useful perfuming ingredients of the aldehydic, floral type. composition may be part of a perfuming composition or a perfumed consumer product.

The application provides a propionaldehyde synthesis system and method, which comprises the following steps: 1) a raw material system comprising ethylene, carbon monoxide and hydrogen is reacted to obtain a gas phase product comprising propionaldehyde; 2) after the gas phase product is subjected to cooling treatment, a propionaldehyde liquid phase crude product and residual gas phase raw material are obtained, and the cooling treatment comprises internal cooling medium treatment and first external cooling medium treatment in sequence; 3) the propionaldehyde liquid phase crude product is subjected to stripping treatment by using synthesis gas raw material to obtain propionaldehyde and synthesis gas raw material after stripping; wherein the residual gas phase raw material and / or the synthesis gas raw material after stripping participates in the internal cooling medium treatment as an internal cooling medium. The propionaldehyde synthesis method can reduce the amount of first external cooling medium refrigeration water by subjecting the gas phase product to internal cooling medium treatment, thereby reducing energy consumption and production cost.

The present invention provides an inhibitor of trimethylamine-responsive receptors that is suitable for deodorizing trimethylamine odor by suppressing the response of trimethylamine-responsive receptors. [Solution] In a preferred example, the inhibitor of the trimethylamine-responsive receptor includes at least one selected from the group consisting of trans-cinnamaldehyde, 3-(1,3-benzodioxol-5-yl-2-methylpropanal, 3-(4-tert-butylphenyl)propanal, trans-2-hexenal, citral, Litsea cubeba fruit oil, 3-methyl-5-phenylpentan-1-ol, 4,8-dimethyl-4,9-decadienal, undecanal, ethyl dehydrocyclogeranate, and 4-[(octahydro-4,7-methano-5H-indene)-5-ylidene]butanal.

The invention relates to the technical field of compound synthesis, in particular to a preparation method of an Advantame intermediate 3-hydroxy-4-methoxy phenylpropanal, which comprises the following steps: mixing deionized water with a basic catalyst; the preparation method comprises the following steps: adding isovanillin into an alkaline substrate solution, fully dissolving the isovanillin, reducing the temperature of the alkaline solution to 9-12 DEG C, slowly adding a predetermined amount of vinyl acetate, dropwise adding the vinyl acetate within 5-6 hours, and continuously stirring and reacting for 30-60 minutes at the temperature of 9-12 DEG C; dropwise adding an acidic solution into the reaction mixture, drying a filter cake, adding ethanol, and recrystallizing to obtain 3-hydroxy-4-methoxycinnamaldehyde; the method comprises the following steps: adding 3-hydroxy-4-methoxycinnamyl aldehyde into a hydrogenation reaction kettle, adding a 10% palladium carbon catalyst, controlling the kettle temperature to be 10-30 DEG C, and controlling the hydrogen introduction pressure to be 0.6-0.8 mpa until the pressure in the reaction kettle is not reduced any more, thereby obtaining the 3-hydroxy-4-methoxyphenylpropanal.

The application relates to the technical field of pharmaceutical chemistry, and discloses a benzazepine bridged ring derivative and a preparation method thereof. The preparation method comprises the following steps: adding a substrate (1.0 eq), a sulfur-substituted benzylpropyl aldehyde (1.5 eq), a base DABCO (0.2 eq) and dry acetonitrile (2.0 mL) into a reaction test tube, mixing the mixture at normal temperature for 24 hours, concentrating and purifying after the reaction is completed to obtain a hemiacetal product 3. Then the hemiacetal product, chloroform (0.5 mL) and H2O (100 muL) are added into the reaction test tube, and stirring is carried out at 60 DEG C for 72 hours. The reaction is monitored to be completed through thin layer chromatography, then the reaction mixture is directly purified through column chromatography to obtain a corresponding target product. The preparation method has the advantages of simple operation, mild reaction and high yield. The derivative provided by the application has good antibacterial activity, and has a wide market application prospect.