13 results about "Hexaldehyde" patented technology

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 invention discloses a preparation method of trans-2-hexenal. The preparation method comprises the step of enabling n-hexanal to react in the presence of a palladium catalyst, a bipyridine ligand and an oxidizing agent to obtain the trans-2-hexenal. According to the method, the trans-2-hexenal is prepared through the selective oxidative dehydrogenation reaction of the n-hexanal in the presence of the palladium catalyst, the bipyridine ligand and the oxidizing agent, the reaction yield and selectivity are greatly improved, the content of cis-configuration byproducts can be controlled to be 1% or below, and the rectification purification difficulty of the trans-2-hexenal is greatly reduced.

A 1,3-diol monoesters of formula (la): (Ia) Wherein each R' is independently C1-10 alkyl; one Ra group is hydrogen and the other Ra group is –C(O)CH(R)2; each R is independently C1-10 alkyl; or two R groups on the same carbon atom are taken together to form a cyclic group selected from heteroaryl, heterocycloalkyl, cycloalkyl and aryl, each of which is optionally substituted; and wherein the compound comprises at least one cyclic group as defined above. Compounds wherein all R and R’ may be C1-10 alkyl are also disclosed. Use of the compounds as coalescence agents in coating compositions is also disclosed. Processes for preparing the compounds are disclosed, such processes being based upon the Aldol-Tishchenko reaction. Compositions comprising the compounds, along with methods of coating a substrate using the compositions, and substrates coated with the compositions are also disclosed. The cyclic group is preferably a heterocyclic group, particularly furan or tetrahydrofuran. The compounds may in particular be the Aldol-Tishchenko product of furfural and 2-ethybutyraldehyde or 2-ethylhexanal; or 2-ethylhexanal and 2-ethylbutyraldehde. [See Formula Ia of Claim 1 a filed]

Process for the preparation of acetal-protected sugars comprising the step of reacting a diol group of a sugar selected from the group consisting of valeralose and hexaldehyde with one or both compounds of formula (Ia) and / or formula (Ib) in the presence of a homogeneous or heterogeneous catalyst, to form an acetal protected sugar selected from the group consisting of compounds of formula (II), formula (III) and formula (IV); wherein R1 and / or R2 are each independently-Z-X, and wherein Z is a linear, branched or cyclic hydrocarbon moiety having 1 to 10 carbon atoms, optionally substituted by 1 to 4 C1-C4 alkyl groups or 1 to 4 halogen atoms, or Z is-B-D, where B is a linear hydrocarbon moiety having 1 to 3 carbon atoms and may be present or absent, D is an aromatic moiety having 6 carbon atoms, wherein Z may be present or absent, and X is-COOH,-CH (COOH) 2,-COOR3, CHO,-C2H3,-C2H,-CHOR4OR5,-N3,-NHR6,-NR7R8,-F,-Cl,-Br,-I, or, if Z is present, X is-OH, NH2, or-SH, optionally substituted by 1 to 4 C1-C4 alkyl groups, 1 to 2-OH groups, 1 to 2-OCH3 groups, or 1 to 4 halogen atoms, and wherein Z may be present or absent,-COOR3, CHO,-C2H3,-C2H,-CHOR4OR5,-N3,-NHR6,-NR7R8,-F,-Cl,-Br,-I; r3, R4 and R5 are independently selected from the group consisting of linear, branched or cyclic hydrocarbon moieties having 1 to 20 carbon atoms and optionally substituted by 1 to 4 C1 to C4 alkyl groups and / or 1 to 4 halogen atoms selected from the group consisting of fluorine, chlorine, bromine and iodine; r6 is a C1-C4 alkyl group; r7, R8 and R9 are each independently a C1-C4 alkyl group; r30 and R31 are each independently selected from the group consisting of hydrogen and a linear or branched hydrocarbon moiety having 1 to 4 carbon atoms, with the proviso that R30 and R31 cannot be hydrogen at the same time; r < 10 > is selected from the group consisting of-H,-OH,-CH2OH,-OR13 or-CH2OR14; r < 11 > and R < 12 > are independently selected from the group consisting of-OH or-OR13; r13 and R14 are independently selected from hydrocarbon moieties having from 1 to 10 carbon atoms; and n and p are each independently 0 or 1.

The present invention relates to a process for the preparation of 2-isopentyl-2- isopropyl-1,3-dimethoxypropane, said process comprising the steps of: i) contacting iso-valeraldehyde with an aqueous solution of a hydroxide base selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) or a combination thereof, said solution having an amount of said hydroxide base of at least 20% w / v, and (m) ethanol; form (2Z)-2-isopropyl-5-methyl-2-hexenal; step ii) contacting (2Z)-2-iso-propyl-5-methyl-2-hexenal with a reducing system to form 2-isopropyl-5-methylhexanal; step iii) contacting 2-isopropyl-5-methylhexanal with formaldehyde and an inorganic base to form 2-isopentyl-2-isopropylpropane-1,3-diol; and step iv) contacting 2-isopentyl-2-isopropylpropane-1,3-diol with a methylation agent and a base to form 2-isopentyl-2-isopropyl-1,3-dimethoxypropane.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a synthesis method of cis-6-nonene-1-ol. The preparation method comprises the following steps: enabling 1, 6-hexanediol to react with tert-butyldimethylsilyl chloride, so as to obtain 6-((tert-butyldimethylsilyl) oxy) hex-1-alcohol; and adding an oxidizing agent into the 6-((tert-butyldimethylsilyl) oxy) hexane-1-alcohol to obtain the 6-((tert-butyldimethylsilyl) oxy) hexanal. And adding triphenyl (propylidene)-phosphorus into the 6-((tert-butyldimethylsilyl) oxy) hexanal to obtain the (Z)-tert-butyldimethyl (6-alkene-1-oxy) silane. The preparation method comprises the following steps: adding triphenyl (propylidene)-phosphorus into the 6-((tert-butyldimethylsilyl) oxy) hexanal; tetrabutylammonium fluoride is added into the (Z)-tert-butyl dimethyl (6-ene-1-oxy) silane, and the cis-6-nonene-1-ol is obtained. The synthetic route is mild in reaction condition, low in cost and suitable for industrial production, and the total yield can reach 29%. And secondly, the synthetic route does not generate harmful substances or dangerous compounds, and is environment-friendly.

The invention discloses a deodorizing method of a regenerated polypropylene material. According to the deodorizing method of the regenerated polypropylene material, supercritical CO2 extraction treatment is carried out on the regenerated polypropylene material by adopting an extracting agent, wherein the extracting agent comprises supercritical CO2 and a cosolvent; wherein the volatile odor substance of the regenerated polypropylene material comprises one or more of isoparaffin with 10 to 20 carbon atoms, isoolefin with 10 to 20 carbon atoms, decane, n-dodecane, n-tetradecane, octanal, hexanal, limonene, isoterpinene, octanone and terpene alcohol. The odor removal method can effectively remove volatile odor substances in the regenerated polypropylene material, and the odor grade of the obtained regenerated polypropylene material can meet the application requirements of automotive interiors.

The invention provides a hexamethylene(meth)acrylate composition suitable for producing a cured product with excellent physical properties, and a resin composition curable by active energy beams, and a cured product utilizing the same. The composition according to the present invention relates to a hexamethylene(meth)acrylate composition containing hexamethylene(meth)acrylate, in which the total content of a compound having two or more secondary hydroxyl groups in one molecule (A1) and a (meth)acrylate compound (A2) of compound (A1) is 100 ppm by mass or less, and the total content of 6-hydroxyhexanal and a derivative thereof (B1) and a (meth)acrylate compound (B2) of compound (B1) is 1,500 ppm by mass or less.

The application discloses a kind of Ni modified micropore-mesopore type molecular sieve and its preparation method and application, which comprises the following steps: a. in alkaline environment and normal temperature, silicon source, aluminum source, micropore directing agent, nickel source are mixed in water, after stirring, microporous molecular sieve precursor is prepared by crystallization;B. mesoporous directing agent is added to microporous molecular sieve precursor at normal temperature, after being fully stirred, micropore-mesopore type molecular sieve is obtained by crystallization, filtration, washing, calcination.The application proposes a kind of Ni modified micropore-mesopore type molecular sieve, the molecular sieve is applied to the reaction rectification of 2-ethylhexene aldehyde hydrogenation reaction liquid, can decompose acetal type heavy component, improve the yield of product 2-ethylhexanal, and kettle bottom product is rich in 2-ethylhexene aldehyde, can be reused to hydrogenation process to improve raw material utilization rate.

This invention discloses a method for preparing 3,5,5-trimethylhexanoic acid and its application, belonging to the technical field of 3,5,5-trimethylhexanoic acid preparation. The method for preparing 3,5,5-trimethylhexanoic acid includes the following steps: S1, dehydrating tert-butanol to prepare isobutylene; wherein the tert-butanol used contains <0.3% by mass of n-propanol, <0.3% by mass of isopropanol, <0.3% by mass of n-butanol, and <0.3% by mass of isobutanol; S2, preparing diisobutylene from the isobutylene obtained in S1; S3, preparing 3,5,5-trimethylhexanal from the diisobutylene obtained in S2 via hydroformylation; S4, preparing 3,5,5-trimethylhexanal from the 3,5,5-trimethylhexanal obtained in S3 via oxidation. The 3,5,5-trimethylhexanoic acid obtained by this invention has high purity.

The disclosure provides polypeptides and encoding nucleic acids of engineered carboxylic acid reductases and / or engineered alcohol dehydrogenases. The disclosure also provides cells expressing an engineered form of the carboxylic acid reductases and / or engineered alcohol dehydrogenases. The disclosure further provides methods for producing a bioderived compound, such as 1,6 hexanediol (HDO), hexamethylenediamine (HMD), upstream precursors (e.g., adipate semi-aldehyde, 6-aminocaproic acid, 6-aminocaproate semialdehyde, 6-hydroxyhexanoic acid, 6-aminohexanol, caprolactone, caprolactam, and / or 6- hydroxyhexanal), and products derived therefrom comprising culturing cells expressing an engineered carboxylic acid reductase and / or engineered alcohol dehydrogenases.

The present invention relates to a method for preparing an at least partially acetal-protected sugar involving the step of reacting a sugar or a sugar derivative selected from the group consisting of an aldopentose, an aldohexose, an aldopentoside and an aldohexoside with an aldehyde or an aldehyde source in the presence of heterogeneous acidic catalyst to form the at least partially acetal-protected sugar selected from the group consisting of a compound of formula (I), (II), (III), (IV), (V), (VI), (VII), (VIII), (IX), (X,)(XI) and (XII) wherein R1, R1′, R2, R2′, R3, R3′, R4, R5, R6, R7, R8, R9, R10, R11, R12, and R12′ are Y or Z-E, and wherein R1 and R1′, R2 and R2′, R3 and R3′, and R12 and R12′ are the same or different from each other and Y is hydrogen or a linear, branched or cyclic hydrocarbon moiety having 1 to 20 carbon 69 atoms, Z is a linear, branched or cyclic hydrocarbon moiety with 0 to 12 carbon atoms, optionally substituted with 1 to 4 C1 to C4 alkyl groups, 1 to 4 halogen atoms, or benzyl groups and E is —COOH, —CH(COOH)2, —COOR19, —CH(COOR20)(COOR21), —CHO, —CH(CHO)2, —C2H3, CH(C2H3)2, —CHCHR22, —CHCR23R24, —C2H, —C2R25, —N3, —NH2, —CH(NH2)2, —NHR26, —CH(NHR27)(NHR28), —NR29R30, —CH(NR31R32)(NR33R34), —OH, —OR35, —CH(R36OH)(R37OH), and R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, and R35, are independent from each other C1 to C20 alkyl, and R20 and R21, R23 and R24, R27 and R28, R29 and R30, R31 and R32, as well as R33 and R34 are the same or different from each other, and R36 and R37 are independent from each other absent or a linear or branched C1 to C12 hydrocarbon chain and R13, R14, R15, R16, R17 and R18 are independent from each other hydrogen or a linear, branched or cyclic hydrocarbon moiety having 1 to 20 carbon atoms.