51 results about "Fatty aldehyde" patented technology

The invention belongs to the field of organic synthesis, and discloses an aldol condensation reaction method and a catalyst thereof.The method comprises the steps that in the presence of a composite catalyst, a substrate 1 and a substrate 2 are subjected to an aldol condensation reaction, after the reaction is finished, an aldol condensation product is collected from reaction products, according to the method, aldol condensation reaction of fatty aldehyde or aromatic aldehyde is catalyzed by adopting the novel composite catalyst, and the method has the advantages of being mild in reaction condition, environmentally friendly, efficient and simple in post-treatment.

The present invention discloses a preparation method for synthesizing α-amino ketone compounds from fatty aldehydes and secondary amines, belonging to the technical field of organic chemical synthesis. The fatty aldehyde, secondary amine, and sodium percarbonate are added to a reaction vessel for mixing, and the reaction is carried out at a temperature of 95 to 115 °C for 16 to 24 hours. After purifying the reaction mixture, α-amino ketone compounds are obtained. The fatty aldehydes and secondary amines used in the method of the present invention are commercially available raw materials or are prepared from commercially available primary alcohols and primary amines through simple oxidation or reduction; the substrate has a wide range of applicability and is applicable to the above-mentioned various fatty aldehydes and secondary amines. The method of the present invention can be prepared only by oxidizing and rearranging with cheap and easily available sodium percarbonate, without the need for additional catalysts and additives, and has the characteristics of high economy, wide commercial sources, and environmental friendliness; the method of the present invention has few reaction steps and has the characteristic of simple operation.

The invention discloses 10-hydroxydecanoic acid as well as a preparation method and application thereof, and belongs to the technical field of cosmetics, Candida lipolytica is taken as a fermentation thallus, the Candida lipolytica contains alkane monooxygenase (CYP450), alcohol dehydrogenase (ADH), fatty alcohol oxidase (FAO) and fatty aldehyde dehydrogenase (FALDH), amplification and activation are performed on the Candida lipolytica in a seed culture medium, and the Candida lipolytica is obtained. The method comprises the following steps: inoculating a seed solution into a liquid culture medium, enabling a strain to adapt to a culture environment in advance, reducing strain death caused by environmental mutation after inoculation, inoculating the seed solution into the liquid culture medium, culturing until OD600 is 45-55, realizing high-density enrichment of the strain, being beneficial to increasing the content of CYP450, ADH, FAO and FALDH, adding decane and Tween 80, and enabling the Tween 80 to be capable of increasing the permeability of a cell membrane and increasing the reaction rate, the CYP450 is used for catalyzing decane to carry out hydroxylation, and ADH, FAO and FALDH are used for carrying out oxidation, so that the high-purity 10-hydroxydecanoic acid is obtained.

The invention discloses a visual fatty aldehyde adsorption material as well as a preparation method and application thereof, develops a monoquinone column [5] arene macrocyclic compound, and successfully applies the monoquinone column [5] arene macrocyclic compound to adsorption and capture of fatty aldehyde. The negative electron macrocyclic cavity of the monoquinone column [5] arene macrocyclic compound provided by the invention can capture fatty aldehyde molecules and form a host-guest complex with the stoichiometric ratio of 1: 1. The capture is accompanied with the obvious color change of the monoquinone column [5] arene macrocyclic compound from red to dark brown, and an intuitive and easy-to-monitor visual means is provided for the adsorption process of fatty aldehyde steam. The interaction force between the material and fatty aldehyde molecules is relatively strong, so that the fatty aldehyde molecules can be well stored without leakage. The method has the characteristics of low energy consumption and simplicity and convenience in operation, and conforms to the green chemistry concept. Meanwhile, the compound also realizes visual monitoring of the fatty aldehyde adsorption process, and a novel, energy-saving and environment-friendly technical scheme is provided for capture of fatty aldehyde.

The application provides a method for preparing alpha-sulfonamidyl acetal compounds from fatty aldehyde and sulfonamide, and belongs to the technical field of organic chemical synthesis, and comprises the following steps: step 1: fatty aldehyde, sulfonamide, sodium iodide, sodium carbonate peroxide and methanol or ethanol are added into a reaction container for mixing, a reaction mixture is obtained by reacting at a temperature of 50-80 DEG C for 16-24 hours; step 2: after the reaction mixture is purified, alpha-sulfonamidyl acetal compounds are obtained. The sulfonamide drugs used in the method are all commercially available, the fatty aldehyde is commercially available or is prepared by simply oxidizing commercially available fatty alcohol, and the pre-catalyst sodium iodide and the oxidant sodium carbonate peroxide are also cheap and easy to obtain; the method has a wide applicable range of substrates and good compatibility for sensitive groups; the reaction does not need transition metal catalysis, the alcohol used is used as a raw material and a solvent, and the only by-product is water, so that the method has the characteristics of high atom economy and green environmental protection.

Provided is a composition capable of suppressing generation of a trimer even when an aliphatic aldehyde at a high concentration of 90 mass% or more is stored at a low temperature. The composition contains 90 mass% or more of an aliphatic aldehyde having 8-16 carbon atoms and 100 ppm or more and 1 mass% or less of an additive with respect to the mass of the aliphatic aldehyde, wherein the additive is one or more selected from the group consisting of polyalkylene glycol derivatives represented by formula (I), sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, amino acids represented by formula (II), anthranilic acid esters represented by formula (III), and pyrazine derivatives represented by formula (IV).

The invention discloses an N-acylamino acid surfactant and a preparation method thereof, and belongs to the technical field of surfactants, the N-acylamino acid surfactant is prepared by the following steps: adding potassium anilinoacetate, fatty aldehyde and deionized water into a supercritical reactor according to a certain molar ratio, then adding a certain amount of triethylamine phase transfer catalyst, reacting for a period of time under the condition of supercritical nitrogen, and separating out the N-acylamino acid. And filtering the product in the reactor, standing and layering the obtained filtrate, and taking the subnatant to obtain the amino acid surfactant. The fatty aldehyde and the potassium anilinoacetate are subjected to dehydrogenation reaction under the action of the triethylamine phase transfer catalyst to prepare the amino acid surfactant, the reaction is carried out under the condition of supercritical nitrogen, and the supercritical nitrogen not only provides a high-pressure condition for the dehydrogenation reaction, but also has high solubility and high diffusivity, so that the amino acid surfactant is prepared. The raw materials can be fully dissolved, mixed and reacted, and the yield of the amino acid surfactant is high.

The invention discloses an alkyl substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordination metal peroxide catalyst, a compound catalyst, a preparation method and application, and the general formula of the alkyl substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordination metal peroxide catalyst is shown in the specification. The composite catalyst comprises an alkyl substituted 1, 4-bis (2-pyridyl methyl)-1, 4-diazane coordination metal peroxide catalyst, a cocatalyst, a regulator, a protective agent and a solvent. The alkyl-substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordinated metal peroxide catalyst and the compound catalyst can improve the selectivity of the reaction for preparing fatty acid by oxidizing fatty aldehyde, increase the reaction activity, can be repeatedly used, are low in cost, have a relatively high utilization rate, and are particularly suitable for the oxidation reaction of C4-C18 fatty aldehyde.

The invention belongs to the technical field of fatty acid methyl ester conversion, and discloses a method for preparing long-chain alpha-olefin and co-producing fatty aldehyde and formic acid from fatty acid methyl ester. The method comprises the following steps: carrying out hydrogenation reaction on fatty acid methyl ester to generate fatty alcohol and methanol; carrying out dehydration / dehydrogenation reaction on the fatty alcohol to obtain long-chain alpha-olefin, fatty aldehyde, water and hydrogen; carrying out dehydrogenation reaction on the methanol to generate methyl formate and hydrogen; carrying out hydrolysis reaction on the methyl formate to obtain formic acid and methanol; wherein the catalyst used in the dehydration / dehydrogenation reaction of the fatty alcohol comprises a dehydrogenation active site, a dehydration active site, a dispersing aid and a carrier; the dispersity of the dehydrogenation active site is greater than 31.0%; the concentration of the dehydration active site is 4.5 to 9.0 [mu] mol / g. Three high-added-value products of long-chain alpha-olefin, fatty aldehyde and formic acid can be simultaneously produced by using the single raw material fatty acid methyl ester, the comprehensive utilization rate of byproducts in the process is high, zero discharge of wastewater in the process is realized, and balanced utilization of the raw material and the products is achieved.

The application discloses a method for identifying Klebsiella pneumoniae gene circadian rhythm expression by using a bioluminescence reporting system. The application constructs a recombinant bioluminescence Klebsiella pneumoniae driven by a metabolic gene malate:quinone oxidoreductase mqo promoter (Pmqo), and directly observes the change rule of bacterial gene expression under entrainment and free-running conditions of temperature cycle by monitoring the luminescence characteristics. The luxCDABE gene operon comprises genes for coding luciferase and substrate synthesis enzyme, wherein luxA and luxB code for heterodimer luciferase, luxC, luxD and luxE synthesize aldehyde as a substrate for the luciferase luminescence reaction. The luciferase catalyzes the oxidation of aldehyde to generate visible blue-green light with a wavelength of 450-490 nm. The Lux bioluminescence reporting system has the advantages of not needing to add an exogenous substrate and not affecting the normal physiological functions of the host, and can be applied to the identification of Klebsiella pneumoniae gene circadian rhythm expression.

The invention provides non-naturally occurring microbial organisms having a formaldehyde fixation pathway, a formate assimilation pathway, and / or a methanol metabolic pathway in combination with a fatty alcohol, fatty aldehyde, fatty acid or isopropanol pathway, wherein the microbial organisms selectively produce a fatty alcohol, fatty aldehyde or fatty acid of a specified length or isopropanol. The microbial organisms provided advantageously enhance the production of substrates and / or pathway intermediates for the production of chain length specific fatty alcohols, fatty aldehydes, fatty acids or isopropanol. In some aspects, the microbial organisms of the invention have select gene disruptions or enzyme attenuations that increase production of fatty alcohols, fatty aldehydes or fatty acids. The invention additionally provides methods of using the above microbial organisms to produce a fatty alcohol, a fatty aldehyde, a fatty acid or isopropanol.

The invention discloses a synthesis method of an allyl ester compound, and belongs to the technical field of organic synthesis. According to the synthesis method disclosed by the invention, a reaction equation is # imgabs0 #, and direct coupling of fatty aldehyde and olefin is realized by utilizing a cobalt oxime catalyst and a halogen atom transfer (XAT) mechanism, so that the allyl ester compound is synthesized. The adopted raw materials are cheap and easy to obtain, the operation is simple, the reaction conditions are mild, and high temperature or high pressure is not needed; the low-toxicity solvent (acetonitrile) and the blue light LED are used for irradiation, so that the energy consumption is low, the synthesis cost is effectively reduced, and industrial production is facilitated.

This invention provides a method for efficiently producing aliphatic aldehydes by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of a ruthenium-supported catalyst, The ruthenium-supported catalyst comprises ruthenium supported on a carrier, The aforementioned support is a porous oxide, The surface area per unit mass of ruthenium is 60 m². 2 / g or more The mesopore volume of the ruthenium-supported catalyst is 0.15 mL / g or more. A method for producing aliphatic aldehydes.

The invention discloses a nitrogen-containing one-dimensional carbon nanorod and a preparation method thereof, and belongs to the technical field of new nano materials. The preparation method comprises the following steps: by taking melamine and aromatic amine-acid as raw materials, fatty aldehyde as a polymerization reaction initiator and a dual-surfactant synthesized by an anionic surfactant and a nonionic surfactant as a template agent, mixing the template agent with the melamine and the like in an acidic environment, and carrying out a polymerization reaction to obtain a polymer; the preparation method comprises the following steps: regulating the mass ratio of double surfactants to interfere the form of a template agent, converting the template agent into rod-like micelles, carrying out Schiff base addition polymerization reaction to obtain a polymer nanorod, and further carrying out high-temperature pyrolysis treatment in an inert atmosphere to obtain a carbonaceous nanorod. The carbon nanorod has the specific surface area of 450 m < 2 > g <-1 > and is used as a supercapacitor, and the method is simple to operate, low in cost, mild in process condition and environmentally friendly.

The invention belongs to the new technical field of white spirit brewing, and particularly relates to a method for accelerating aging of white spirit through a hydrothermal synergistic electro-catalysis process, which specifically comprises the following steps: introducing newly-brewed white spirit into an aging container, carrying out electro-catalysis treatment, selecting titanium-plated platinum as an electrode material, and carrying out hydrothermal reaction synergistic treatment at the same time; after electro-catalysis treatment, constant-temperature water bath treatment is conducted, the operation is repeated for 3-5 times, and the treatment interval is 30-50 min. The content of acetal in the white spirit treated by the method is increased, the content of ester substances such as ethyl hexanoate and ethyl acetate is obviously increased, and irritant components such as low-grade saturated fatty aldehyde and fusel oil are reduced. The treated white spirit has the aroma of aged white spirit, tastes soft and soft, contains typical aromatic odor of the white spirit, has prominent flavor and is mellow and pleasant during drinking, and is equivalent to natural ageing for 1-3 years, so that the ageing period of the white spirit is greatly shortened, and the ageing cost of the white spirit is reduced.

The invention provides a method for separating cis-trans isomers of astaxanthin. The method comprises the following steps: P1, packing and balancing; p2, sample loading: dissolving an astaxanthin raw material in a sample loading solvent, filtering, and loading filtrate to the top end of the chromatographic column balanced in the step P1; p3, gradient elution: carrying out staged elution by using a first elution solvent, a second elution solvent and a third elution solvent in sequence, and collecting effluent in a staged manner; p4, separation and purification; the amido-functionalized silica gel adsorbent takes porous silica gel as a matrix, and the surface of the porous silica gel is bonded with a steric hindrance amido functional group formed by a reductive amination reaction of branched chain fatty aldehyde and an aminopropyl silanization group. According to the method, the silica gel adsorbent with the steric hindrance amino functional group and an optimized stage elution procedure are designed to have a synergistic effect, and high-efficiency and high-selectivity synchronous separation of the astaxanthin cis-trans isomers is realized on conventional chromatographic equipment.

The present invention discloses a method for the transfer hydrogenation reduction of fatty aldehydes, which relates to the technical field of fine organic chemical industry and comprises the following steps: Step S1, successively add α,β-unsaturated aldehyde, inert solvent, catalyst and hydrogen source into a high-pressure reaction vessel equipped with a condensation reflux device, after microwave-assisted treatment, carry out transfer hydrogenation reduction reaction at a certain temperature; Step S2, after the reaction is complete, cool to room temperature, filter to remove the catalyst, and rotary evaporate to remove the inert solvent and other low-boiling substances; the catalyst comprises an active component and an auxiliary component, the active component is a surface organic ionic salt modified palladium-carbon catalyst, and the auxiliary component is a nano rare earth oxide, and the mass ratio of the active component to the auxiliary component is (5-8):1. This method has high conversion rate, selectivity and yield.

The present application relates to temperature sensitive indicating material, cold chain monitoring and biomedical packaging technical field, specifically relates to a kind of temperature indicator based on polyvinyl acetal polymer white type.It is specifically technical scheme that the high temperature indicator includes temperature sensitive indicating layer, the temperature sensitive indicating layer includes modified polyvinyl acetal polymer, the modified polyvinyl acetal polymer is prepared by acetalization reaction of polyvinyl alcohol and aliphatic aldehyde.This application solves the problems of high cost, not intuitive, difficult to characterize cumulative heat exposure history and difficult to grade severity in the existing vaccine temperature monitoring mode.

The present application relates to a kind of high crosslinking macroporous resin of adsorbing macromolecular toxin and its preparation method, belong to blood perfusion adsorption resin technical field.The preparation method described in the present application includes: (1) the styrene monomer, polyvinyl crosslinking agent, pore-forming agent and initiator are mixed as oil phase, dispersant, surfactant, salt and pure water are mixed as water phase, oil phase is dispersed in water phase under stirring condition to prepare O / W emulsion, suspension polymerization reaction is carried out by heating, polystyrene-based white ball is obtained, washing, extraction, drying;(2) polystyrene-based white ball is swelled, then fatty aldehyde and lewis acid catalyst are added, reaction is carried out, and the product is washed and dried.The high crosslinking macroporous resin described in the present application has larger specific surface area, excellent biocompatibility, can adsorb protein binding class toxin such as macromolecular toxin in blood;The present application simultaneously provides preparation method, green and environmental protection.

The invention provides a green synthesis method of an alpha-aminoketone compound based on visible light catalytic oxidation amination reaction, and belongs to the technical field of organic chemical synthesizing.According to the method, aliphatic aldehyde and secondary amine which are low in price and easy to obtain serve as raw materials, oxygen serves as a green terminal oxidizing agent, and the alpha-aminoketone compound is synthesized under normal temperature and visible light irradiation. The alpha-aminoketone compound is efficiently synthesized in one step through oxidative amination reaction catalyzed by organic photosensitizers such as rhodamine 6G and anthraquinone. According to the method, a noble metal catalyst and a stoichiometric oxidant are abandoned, the reaction condition is mild (room temperature), the operation is simple and convenient, the substrate application range is wide, and the method shows excellent compatibility to functional groups including various complex cyclic secondary amines (such as natural product derivatives of nornicotine, cytisine and the like); compared with the prior art, the method has the advantages that important transformation from thermal activation to light activation is realized on the reaction mechanism, and a novel green way which is more economical and environment-friendly and is easy for large-scale production is provided for synthesis of alpha-aminoketone.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of an N-oxyl compound and / or an N-oxide compound and a metal-supported catalyst, The metal-supported catalyst includes a metal supported on an inorganic support, A method for producing an aliphatic aldehyde, wherein the N-oxyl compound and / or N-oxide compound is one or more selected from the group consisting of compounds represented by general formula (I), compounds represented by general formula (II), and compounds represented by general formula (III). [Formula 1] JPEG2026104778000025.jpg37124

The invention provides non-naturally occurring microbial organisms having a formaldehyde fixation pathway, a formate assimilation pathway, and / or a methanol metabolic pathway in combination with a fatty alcohol, fatty aldehyde, fatty acid or isopropanol pathway, wherein the microbial organisms selectively produce a fatty alcohol, fatty aldehyde or fatty acid of a specified length or isopropanol. The microbial organisms provided advantageously enhance the production of substrates and / or pathway intermediates for the production of chain length specific fatty alcohols, fatty aldehydes, fatty acids or isopropanol. In some aspects, the microbial organisms of the invention have select gene disruptions or enzyme attenuations that increase production of fatty alcohols, fatty aldehydes or fatty acids. The invention additionally provides methods of using the above microbial organisms to produce a fatty alcohol, a fatty aldehyde, a fatty acid or isopropanol.

Described are methods for preparing a deuterated aldehyde using with a photocatalyst and a hydrogen atom transfer agent in a H2O free solvent comprising D2O and an organic solvent under an inert gas. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions.

The application provides a method for preparing naphthoquinone compounds by selectively oxidizing naphthyl aromatic hydrocarbons with molecular oxygen, and belongs to the technical field of fine chemicals. The method uses Co-based catalysts to selectively oxidize naphthyl aromatic hydrocarbons with molecular oxygen to prepare naphthoquinone compounds in the presence of fatty ethers or fatty aldehydes. The Co-N-C composite material used in the method is obtained by mixing an inorganic metal salt and an organic nitrogen-containing compound to obtain a precursor, and then calcining the precursor in an inert atmosphere at a certain temperature. The conversion rate of naphthyl aromatic hydrocarbons is more than 80%, and the selectivity of naphthoquinone compounds is more than 75%. The application uses molecular oxygen as an oxidant, and the catalytic reaction conditions are relatively mild and the reaction is safer. In the oxidation system, the naphthyl aromatic hydrocarbons mainly undergo C-H bond oxygenation reaction on the naphthalene ring, which is a new system for synthesizing naphthoquinone compounds.

The present invention relates to a method for producing aliphatic aldehydes from syngas, a ruthenium catalyst being used in the process.

The disclosure provides a polyvinyl acetal preparation method, a polyvinyl acetal film and a preparation method and application thereof. The polyvinyl acetal preparation method comprises the following steps: adding an acidic catalyst and a first amount of aliphatic aldehyde into a polyvinyl alcohol solution to perform a first-stage reaction at a temperature of 20-30 DEG C, to obtain a first mixture; cooling the first mixture to 5-15 DEG C at a cooling rate of 5 DEG C / min, adding a second amount of aliphatic aldehyde, and performing a second-stage reaction to obtain a second mixture; heating the second mixture to 50-80 DEG C to perform a third-stage reaction, to obtain a third mixture; adjusting the pH value of the third mixture to terminate the reaction, to obtain a polyvinyl acetal with a ratio of meso configuration and racemic configuration of 3.6-6.0, and the mass ratio of the total amount of polyvinyl alcohol, acidic catalyst and aliphatic aldehyde is (10-50):(5-25):(5-15), the total amount of aliphatic aldehyde is the sum of the first amount and the second amount, the first amount accounts for 10-50% of the total amount of aliphatic aldehyde, and the second amount accounts for 50-90% of the total amount of aliphatic aldehyde.

The application discloses a method for preparing fatty acid and fatty alcohol from fatty aldehyde, which comprises the following steps: S1: reacting a mixture I containing a first catalyst and fatty aldehyde to obtain a fatty acid ester; S2: reacting a mixture II containing the fatty acid ester obtained in S1 and a second catalyst to obtain a fatty acid and a fatty alcohol; the fatty aldehyde is at least one of C4-C10 fatty aldehyde; the first catalyst is an aluminum catalyst supported by a polystyrene resin containing an amino acid functional group; and the second catalyst is a strong acidic cation exchange resin. The method has the advantages of mild reaction condition, good operation safety, simultaneous preparation of the fatty acid and the fatty alcohol, continuous reaction and high efficiency.

The invention discloses polyvinyl acetal resin as well as a preparation method and application thereof. The polyvinyl acetal resin is prepared from the following raw materials: polyvinyl alcohol, an acid catalyst, fatty aldehyde, alkyl substituted benzaldehyde and caustic soda liquid. A small amount of alkyl substituted benzaldehyde is compounded with main fatty aldehyde, so that the intrinsic glass-transition temperature of the resin is remarkably increased on the premise of not excessively sacrificing processability and toughness; fatty aldehyde is added step by step in the preparation process, so that the functional monomer can be effectively connected into a polymer chain; alkyl on alkyl substituted benzaldehyde is a hydrophobic non-polar group, so that the polarity of the whole aldehyde molecule is reduced, and the solubility parameter of the aldehyde molecule is better matched with that of a general non-polar / weak-polar plasticizer, so that the long-term compatibility of the resin and the plasticizer is remarkably improved; the problems of plasticizer precipitation, film atomization and adhesion stress reduction in a high-temperature and high-humidity environment are effectively prevented.

The invention relates to a lubricating oil additive and a preparation method thereof, and the preparation method of the additive comprises the following steps: (1) preparation of Mannich base containing 5-chlorobenzotriazole: adding 5-chlorobenzotriazole, organic amine and a solvent into a reactor, simultaneously adding fatty aldehyde or aromatic aldehyde, uniformly stirring and mixing, heating to 50-100 DEG C, carrying out gas stripping to remove water, continuously reacting for 3-9 hours, filtering, washing, and drying to obtain the Mannich base containing 5-chlorobenzotriazole; carrying out reduced pressure distillation to remove the solvent to obtain Mannich base containing 5-chlorobenzotriazole; (2) preparation of a multifunctional additive: adding the Mannich base of 5-chlorobenzotriazole in the step (1) and a solvent into a reaction container, uniformly stirring and mixing, adding alkyl sulfonate, heating to 80-130 DEG C, carrying out reflux reaction for 3-6 hours, adding deionized water after the reaction is completed, separating an oil-water phase, and evaporating to remove the solvent to obtain the lubricating oil additive; wherein the molar ratio of the Mannich base of the 5-chlorobenzotriazole to the alkyl sulfonate in the step (2) is 1: (0.1-0.5); the additive containing the benzotriazole alkyl sulfonic acid derivative and the Mannich base of the 5-chlorobenzotriazole is synthesized, is applied to lubricating oil, has excellent oil solubility and excellent corrosion resistance, rust resistance and wear resistance, and is a lubricating oil additive with excellent comprehensive performance. The preparation process is simple, the reaction conditions are mild, the used raw materials are cheap and easy to obtain, and the synthesis yield is high.

The invention provides a method for preparing 2-alkyl-1, 3 propylene glycol from fatty aldehyde, and belongs to the technical field of liquid crystal materials, and the method comprises the following steps: step S1, fatty aldehyde is subjected to a reaction to prepare methoxyl olefin; s2, carrying out condensation reaction on the methoxyl olefin prepared in the step S1 to obtain methylamino methylene fatty aldehyde; s3, carrying out hydrolysis reaction on the methylamino methylene fatty aldehyde prepared in the step S2 to prepare alkyl malondialdehyde; and S4, carrying out a reduction reaction on the alkyl malonaldehyde prepared in the step S3 to prepare the 2-alkyl-1, 3-propylene glycol. The raw materials used in the preparation method are easy to obtain, reaction conditions are easy to operate, and industrialization is realized; the purity of the prepared product reaches 99% or above, and the total yield of the product reaches 70% or above.