73 results about "Guaianediol" patented technology

The invention discloses a method for synthesizing (ethyl) vanillin by using condensation, oxidation and decarboxylation reactions of glyoxylic acid and (ethyl) guaiacol. The method is characterized in that: a Y-shaped molecular sieve is used for loading copper, manganese and cobalt mixed oxide catalysts, and the condensation reaction and the oxidation reaction are simultaneously performed in a reactor. A molar ratio of the glyoxylic acid and the (ethyl) guaiacol serving as raw materials to sodium hydroxide is 1:(1.0-1.2):(2-4); the pH of solution is more than 12 by controlling the dropping speed of alkali solution; and the temperature in the reaction process is controlled to be between 40 and 80 DEG C when the raw materials are dropped, and the temperature in the reaction process is controlled to be between 80 and 100 DEG C after the raw materials are added. The acid concentration of 3-alkoxy-4-hydroxy phenethyl alcohol is below 4 percent all the time during the oxidation reaction. White (ethyl) vanillin crystals are obtained by performing acidification decarboxylation, extraction separation, and vacuum distillation refining on a reaction completing fluid with 50 percent of sulfuric acid, and the yield is 86.3 percent. By the method, an (ethyl) vanillin synthesis process is simplified, the equipment production capacity is improved, and polymerization by-products are restrained, and auxiliary raw material consumption and waste liquid are reduced.

The invention discloses a method for pretreating a wood fiber raw material by using a eutectic solvent and the eutectic solvent used in the method. The eutectic solvent is composed of choline chloride, aluminum chloride and guaiacol, wherein a molar ratio of choline chloride to guaiacol is 1: (0.5-5), and a molar ratio of molar sum of choline chloride and guaiacol to aluminum chloride is (50-200):1. The eutectic solvent is used for pretreating the wood fiber raw material, hemicellulose and lignin in the material can be effectively removed at a low pretreatment temperature, specific surface area and porosity of the raw material are improved, and a material easy for cellulase hydrolysis is obtained. The lignin removed in the pretreatment process mainly exists in the eutectic system in the form of a small molecular aromatic compound, and is easy to separate and use downstream. Meanwhile, the pretreatment temperature is relatively low, so that condensation polymerization of lignin can beavoided, and quality of the obtained lignin is relatively high.

The invention discloses a method for increasing the hydrogen utilization ratio of guaiacol during hydrodeoxygenation under the normal pressure and reducing carbon atom loss. The method is characterized by comprising the following steps: gasifying guaiacol, and mixing the gasifed guaiacol with hydrogen for reaction under the catalysis of an activated molecular sieve at the normal pressure with the temperature of 250-400 DEG C; while hydrodeoxygenation, allowing a methyl group on guaiacol to return to a benzene ring structure through transmethylation, so as to reduce the carbon atom loss and increase the hydrogen utilization ratio, wherein the activated molecular sieve is selected from Fe / Ni / HBeta, Fe / Ni / ZSM-5, Fe / Ni / HY, Fe / Ni / MCM-41, Fe / Ni / SiO2 or Fe / Ni / Al2O3. Through adoption of the method, the acquired BTX yield can reach up to 19.83%. In the method, an autoclave is eliminated, a transmethylation reaction is realized while hydrodeoxygenation, the carbon atom loss and hydrogen consumption are reduced, and a new way is provided for resource utilization of lignin under the normal pressure.

The invention discloses a thermosetting environment-friendly phenolic resin, which comprises a the following ingredients (by weight percentage): 50-75% of plant phenol from natural resources, 5-15% of potassium hydroxide and / or barium hydroxide and 20-40% of latent solvent. The plant phenol is anacardol, eugenol or guaiacol; the latent solvent is composition of one or more of diol, diol derivative, ester, water and ethanol. The manufacturing method of the thermosetting environment-friendly comprises the following steps: weighing materials in proportion, adding the plant phenol in a reaction kettle, heating to 40-60 DEG C and then adding potassium hydroxide and / or barium hydroxide, after that heating to 100-120 DEG C to stay for 0.5-1.5h, and continuing to heat to 280-350 DEG C to stay for 1.5-3.5h; allowing the viscosity to reach 80,000-100,000MPa, then decreasing the temperature to 40-60 DEG C, and adding the latent solvent to adjust pH value to 6-8; and then regulating the viscosity.

The invention provides a novel compound 1,1',1''-trishydroxy triptycene A. The product is synthesized by the following steps: (1) producing 1,8-disubstituted anthraquinone from ethylene glycol monomethyl ether, metallic sodium and 1,8-dichloroanthraquinone; (2) reducing 1,8-disubstituted anthraquinone with zinc powder to obtain 1,8-disubstituted anthracene; (3) simultaneously, reacting bromine, tert-butylamine and guaiacol to obtain 2-bromo-6-methoxyphenol and reacting 2-bromo-6-methoxyphenol, sodium hydride, trimethylchlorosilane, n-butyllithium and trifluoromethanesulfonic anhydride to obtain a dehydrobenzene precursor; and (4) finally reacting 1,8-disubstituted anthracene and the dehydrobenzene precursor to produce triptycene and carrying out deprotection reaction on the crude product triptycene and boron tribromide to obtain the product 1,1',1''-trishydroxy triptycene. The product 1,1',1''-trishydroxy triptycene synthesized by the method has unique spatial structure and has potential application values in such fields as chemical bionics, molecular recognition, organic materials, and polymers with special functions.

The invention relates to a cyclohexanol derivative 1-methyl-1, 2-cyclohexanediol synthesis method, which comprises: mixing guaiacol and an organic solvent, adding the obtained mixture and a Ni / C catalyst to a reaction kettle, introducing hydrogen gas with a pressure of 1-3 MPa, stirring, and carrying out a heating reaction for 1-3 h at a temperature of 180-260 DEG C; wherein the Ni / C catalyst is anickel-loaded green catalyst taking biomass tar as a carrier. According to the method, synthesis of 1-methyl-1, 2-cyclohexanediol can be achieved in one step, the atom utilization rate reaches 100%,the method has very high conversion rate and selectivity, and the green and energy-saving aims are achieved.

The invention discloses a method for increasing the hydrogen utilization ratio of guaiacol during hydrodeoxygenation under the normal pressure and reducing carbon atom loss. The method is characterized by comprising the following steps: gasifying guaiacol, and mixing the gasifed guaiacol with hydrogen for reaction under the catalysis of an activated molecular sieve at the normal pressure with the temperature of 250-400 DEG C; while hydrodeoxygenation, allowing a methyl group on guaiacol to return to a benzene ring structure through transmethylation, so as to reduce the carbon atom loss and increase the hydrogen utilization ratio, wherein the activated molecular sieve is selected from Fe / Ni / HBeta, Fe / Ni / ZSM-5, Fe / Ni / HY, Fe / Ni / MCM-41, Fe / Ni / SiO2 or Fe / Ni / Al2O3. Through adoption of the method, the acquired BTX yield can reach up to 19.83%. In the method, an autoclave is eliminated, a transmethylation reaction is realized while hydrodeoxygenation, the carbon atom loss and hydrogen consumption are reduced, and a new way is provided for resource utilization of lignin under the normal pressure.

The invention provides a high-yield vanillin synthesis process which comprises the following steps: 1) mixing guaiacol, alkyl pyridine and a sulfonating agent to prepare a product 1; 2) adding the product 1 and an inorganic base into a reactor, dropwise adding a formylation reagent, and reacting to obtain a product 2; and 3) dissolving the product 2 in a solvent, adding an acid, heating, stirring, cooling, and purifying to obtain the target product vanillin. The route provided by the invention has the outstanding advantages of fewer byproducts, high synthesis yield, mild reaction conditions and the like, also solves the problem of low sulfonation para-position yield, and has stronger reference significance.

The invention provides an electronic cigarette liquid for cigarettes, which is prepared by uniformly mixing the following raw materials in percentage by weight: high-nicotine content tobacco absolute 1-3%, guaiacol 0.005%-0.02%, 4-vinyl Guaiacol 0.005%‑0.02%, Tree Moss Absolute 0.01%‑0.02%, Methylcyclopentenolone 0.01%‑0.03%, Gammaenantrolactone 0.005%‑0.01%, 2‑Acetylpyridine 0.005 %‑0.01%, 2,3,5‑trimethylpyrazine 0.003%‑0.005%, macrostigmatrienone 0.01%‑0.03%, deionized water 3%‑7%, propylene glycol 25%‑60%, the remainder The amount is glycerin. The electronic cigarette liquid of the present invention can not only provide tobacco aroma but also provide nicotine with sufficient physiological satisfaction without adding high-purity nicotine. Tobacco absolute is obtained by subcritical extraction, which is simple, effective and convenient for industrial production. The synthetic flavors used make the aroma of e-cigarettes richer and closer to traditional cigarettes.