74 results about "Guaianediol" patented technology

The present invention is directed to compositions that are useful in the prevention and treatment of common cold and influenza-like symptoms due to respiratory tract viral infections. These compositions comprise a guaiacol component, and a mucoadhesive polymer wherein the pH of the composition is about 5.5 or less.

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 preparing acetovanillone and acetosyringone (AS) through oxidation of lignin by using an oxidizing agent. According to the method, an oxidizing agent reacts with the lignin in an alkaline solution; the resulting reaction solution is subjected to acidification, extraction and concentration to obtain the crude product after completing the reaction; the treatments of recrystallization and rectification are performed to obtain the acetovanillone and the AS. The oxidizing agent is the one selected from p-nitrobenzoic acid, 3,5-dinitrobenzoic acid, 3-nitrosalicylic acid, 5-nitrosalicylic acid or 3,5-dinitrosalicylic acid. According to the present invention, the oxidizing agent has low toxicity, such that the harm to the environment can be reduced; the post-treatment steps are simplified, and the uses of the organic solvents are reduced, such that the secondary pollution to the environment is reduced; the yield is relatively high, the purities of the products are respectively 97.3% and 98.2% through the gas chromatography analysis; the two important chemical raw materials of guaiacol and lilac alcohol can be synchronously obtained when preparing the acetovanillone and the AS.

The invention relates to a preparation method of a catalyst applied to the field of preparation of high-added-value fine chemicals by catalytic conversion of biomass, and in particular, relates to a preparation method of a spherical MOFs derived carbon-coated nickel catalyst for catalytic conversion of guaiacol, wherein the preparation method of the catalyst comprises the following steps that: firstly, trimesic acid is used as an organic ligand; nickel nitrate hexahydrate provides metal ions, methanol is used as a reaction solvent, a spherical Ni-MOF precursor is prepared through a hydrothermal method, then a dried precursor is calcined at high temperature in an inert gas atmosphere, and a carbon-coated metal nickel nanoparticle catalyst is obtained. The catalyst is used for a catalytic conversion reaction of guaiacol in a lignin structural unit, the conversion rate can reach 98%-99.9%, the cyclohexanol in the product is a main product, by-products are few, the selectivity of cyclohexanol can reach 68.2%-72.7%, the main product is widely applied in industry, and the method has a good industrial application prospect.

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 relates to oil paint and particularly relates to waterproof wear-resistant polyurethane acrylate oil paint for a copper sculpture. The oil paint is prepared from the following raw materials in parts by weight: 12-15 parts of amino resin, 3-4 parts of boron nitride, 1-2 parts of molybdenum disulfide, 3-4 parts of shell powder, 2-3 parts of citric acid, 1-2 parts of stannous mono-sulphate, 2-3 parts of dicyclopentadiene, 35-40 parts of polyurethane acrylate, 10-12 parts of dipropylene glycol diacrylate, 3-5 parts of allyl glycidyl ether, 1-2 parts of 4-methyl guaiacol, 0.19-0.21 part of an accelerant TT, 5-6 parts of zinc stearate, 4-8 parts of N220 carbon black, 6-9 parts of diamino diphenyl sulfone, 1-2 parts of tributyl tin chloride, 5-6 parts of auxiliaries, 10-12 parts of xylene and 10-12 parts of butyl acetate. The oil paint provided by the invention is strong in adhesive force, bright and full in film, hard and wear-resistant, lasting in color retention, water-permeation-resistant, weatherproof and aging-resistant, long in service life and relatively simple in production process, and can be widely applied to protecting various copper sculpture artware.

The invention belongs to the technical field of biological engineering, and particularly discloses a method for producing 4-vinyl guaiacol by fermenting bacillus circulans. The method takes the bacillus circulans as a producion strain. The method is characterized by comprising the following steps of choosing 1-2 bacillus circulans HG12 thalli from a test tube slant, inoculating to a liquid seed culture medium, and culturing to prepare an activated liquid seed; inoculating the liquid seed into a liquid fermentation culture medium according to inoculum size, and sequentially adding xylanase and feruloyl esterase, culturing to prepare fermentation liquid which contains the 4-vinyl guaiacol; carrying out filtration, extraction and standing phase splitting on the fermentation liquid to prepare extract liquid which contains the 4-vinyl guaiacol, and carrying out vacuum evaporation on the extract liquid to prepare a 4-vinyl guaiacol product. The method disclosed by the invention can realize the continuity and scale of 4-vinyl guaiacol production; the 4-vinyl guaiacol has the advantages of simplicity and convenience for production process, short production period, low production cost and great industrialized application prospect.

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 method for low-temperature complete combustion of bio-oil heavy components by the use of a Cu-Mn base supported monolithic catalyst. By a technological condition that an xCuyMnzM / SBA-15 composite oxide cordierite ceramic monolithic catalyst with a low-temperature activity is used to catalyze a model of a bio-oil heavy components mixture including guaiacol, levoglucosan, methanol and water mixed solution (guaiacol represents benzene oxygenate in the heavy components, levoglucosan represents carbohydrate in the heavy components, and methanol and water are used as solvents for homogeneous mixing of two model compounds), exploration and research are performed to obtain a catalyst system and technological conditions suitable for low-temperature oriented conversion of methanol-soluble viscous real bio-oil heavy components to CO2 and H2O, and low-temperature complete conversion of bio-oil heavy components is realized.

The invention provides preparation of a hetero-element modified porous carbon nitride-titanium nitride (meso-MTiN / C) composite material, and a method for preparing guaiacol through gas-phase etherification of catechol-methyl alcohol by using the hetero-element modified porous carbon nitride-titanium nitride composite material. According to the catalyst, different nitrogen sources are used as raw materials, proper metal hetero-elements are selected for modification, the catalyst is synthesized through a chemical method, and the specific surface area can reach 300-500 m<2> / g; and the catalyst can catalyze catechol monoetherification to prepare guaiacol with high efficiency and high selectivity at a low temperature, wherein the conversion rate can reach 73% or above, the selectivity can reach97% or below, the service life can reach 3000 h, the stability is good, and the problem of catalyst carbon deposition inactivation in a gas phase fixed bed process is solved.

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.

Disclosed is a two-component isocyanate coating. The coating comprises an A component and B component. The coating comprises following raw materials in parts by weight: 30 parts of hydroxyl acrylic resin, 25 parts of polyacrylate aqueous dispersoid, 7 parts of water-based polyaniline emulsions, 15 parts of inorganic pigments, 15 parts of fillers, 10 parts of graphite-phase carbon nitride, 1.5 parts of defoaming agents, 6 parts of coalescing agents, 2 parts of neutralizers, 2 parts of a dispersing agent, 4 parts of a thickening agents, 12 parts of distilled water and 3 parts of wetting agents;1.5 parts of leveling agent, 1 part of antirust agent, 0.8 part of guaiacol and 2 parts of cellulose; the component B is a water-based isocyanate curing agent, graphite-phase carbon nitride is added in the preparation process of the coating, the self-cleaning performance of a coating film can be effectively improved, the combination of cellulose and the curing agent is beneficial to accelerating the drying of the coating and guaranteeing the mechanical performance of the coating film, the formula of the coating is reasonable, and the sprayed coating film can be quickly leveled; the excellent leveling and smoothing effects are achieved, and the coating film is high in hardness, high in scratch resistance and high in pollution resistance.

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 belongs to the technical field of thermosetting resin and discloses a bio-based dibenzoxazine monomer and a preparation method thereof. The preparation method comprises the following steps: using bio-based guaiacol and furfural as raw materials to prepare a diphenol compound, then mixing the bio-based diphenol compound, an amine compound and paraformaldehyde and then adding into a low-polarity solvent, reacting for 4-14 hours at the temperature of 90-120 DEG C, purifying substances in a reaction liquid after the reaction is stopped, and vacuum-drying to obtain the bio-based dibenzoxazine monomer. The preparation method has the advantages that the bis-benzoxazine monomer is synthesized by using the bio-based raw materials, the synthesis steps are simple, the yield is relatively high, and the cured benzoxazine resin has very excellent thermal and mechanical properties and excellent flame retardance; the synthesis process is simple, has low requirements on equipment, and issuitable for large-scale production.

The invention discloses preparation of a superstrong anti-oxidative deformation vesicle. The superstrong anti-oxidative deformation vesicle is prepared from ethyl diimino methyl guaiacol manganese chloride, sucrose laurate, glycerol, PPG-13-decyl tetradecanol polyether-24 and butanediol according to the mass ratio of (3-4):(2-10):(8-15):(10-18):(50-80). The superstrong anti-oxidative deformation vesicle prepared by the invention has the beneficial effects of high content of active ingredients, good transdermal absorbability, good stability, low irritation and remarkable anti-oxidative effect; the preparation method is simple and controllable; the repeatability is good; and the superstrong anti-oxidative deformation vesicle can be directly applied to cosmetics with anti-oxidative effects in various dosage forms.

The invention belongs to the technical field of catalyst synthesis, and particularly discloses a nickel phosphide-zirconium phosphate composite catalyst with mesoporous structure as well as a preparation method and an application thereof. The nickel phosphide and zirconium phosphate composite catalyst with the mesoporous structure, disclosed by the invention, is composed of two components, namely nickel dodecaphosphate (Ni12P5) and zirconium pyrophosphate (ZrP2O7), and the molar ratio of Zr to Ni is 0.1-1.0. The nickel phosphide and zirconium phosphate composite catalyst is prepared through a one-pot method, nickel phosphide and zirconium phosphate are doped together on the molecular level, the dispersity of nickel phosphide is high, agglomeration is not likely to happen, and the nickel phosphide and zirconium phosphate composite catalyst has excellent stability. The prepared catalyst has excellent catalytic activity for the hydrodeoxygenation reaction of guaiacol, the guaiacol conversion rate reaches 100% at 250 DEG C under 3MPa H2, and the selectivity for cyclohexane can reach 91.13%.

The invention relates to a method for rapidly predicting fruiting capacity of lentinula edodes strains. Low melting-point agarose containing guaiacol is used as a chromogenic substrate, lentinula edodes hypha obtained by preculture is inoculated to the chromogenic substrate, after an enzymatic reaction, an OD value of the chromogenic substrate is read by a spectrophotometric method, concentrationof the low melting-point agarose and the guaiacol in the chromogenic substrate are separately 1% and 0.02%, and a melting point of the low melting-point agarose is 65 DEG C. According to the method for rapidly predicting the fruiting capacity of the lentinula edodes strains, a chromogenic qualitative method is combined with the spectrophotometric method, continuous change of enzyme activity of themass strains can be rapidly detected, the fruiting condition can be predicted according to an obtained enzyme activity result, the maximum time is no more than 13 days from hypha preculture to enzymeactivity detection, and the prediction accuracy reaches up to 85% or above.

The invention belongs to the technical field of 4-vinyl guaiacol preparation, and relates to a preparation method of 4-vinyl guaiacol, and the 4-vinyl guaiacol. The preparation method comprises the following steps: filling a fixed bed reactor with a solid super acidic catalyst, and heating the fixed bed reactor; introducing a mixture of ferulic acid and a weakly alkaline organic solvent into the fixed bed reactor; performing a decarboxylic reaction on the mixture under the effect of the solid super acidic catalyst to obtain a crude product of 4-vinyl guaiacol; refining the crude product to obtain high-purity 4-vinyl guaiacol. The method is likely to realize continuous production and simple in process, so that the reaction yield is improved, generation of a polymer is greatly reduced, and the product quality is improved.

The invention belongs to the field of preparation of catalysts, and particularly relates to a preparation method of a core-shell catalyst for catalyzing hydrodeoxygenation of guaiacol to prepare cyclohexanol. The preparation method comprises the following steps: firstly, preparing cobalt nanoparticles by utilizing a solvent reduction method, and then preparing the Co-coated MxOy-SiO2 core-shell type catalyst taking Co as a core and taking MxOy-SiO2 as a shell by utilizing a post-synthesis method, wherein M = Ce, Ti and Al. The catalyst is simple in preparation process and low in cost, the reaction is carried out at low pressure and low temperature, and energy consumption is low. Besides, the prepared core-shell type catalyst shows good reaction activity in guaiacol hydrodeoxygenation reaction, is good in stability, can be roasted and recycled after reaction, and has good economic benefits.

The invention discloses a reaction device used for condensation reaction of glyoxylic acid and guaiacol, vanillin production equipment containing the reaction device, and a vanillin production method. The reaction device used for condensation reaction of glyoxylic acid and guaiacol provided by the invention comprises a reaction tower set with a total liquid inlet and a total liquid outlet, wherein the reaction tower set comprises at least one vertically-arranged reaction tower; the lower part of the reaction tower is provided with a liquid inlet, and the upper part of the reaction tower is provided with a liquid outlet; the liquid inlet communicates with the total liquid inlet, and the liquid outlet communicates with the total liquid outlet; at least one sieve plate with through-flow holes is arranged inside the reaction tower; and at least one part of the surface of the sieve plate is not parallel with the center line of the reaction tower. The vanillin production equipment disclosed by the invention comprises the reaction device, and the vanillin production method disclosed by the invention adopts the above-mentioned vanillin production equipment. By utilizing the above-mentioned reaction device, conversion rate and selectivity of condensation reaction can be guaranteed, and industrial operation cost is reduced at the same time.

A solid enzyme type time-temperature indicator is composed of two parts, namely a laccase PVA gel slice and a guaiacol PVA gel slice, when in use, the two parts fit to form the solid enzyme type time-temperature indicator, wherein the laccase PVA gel slice is a PVA gel slice embedded with laccase, and the guaiacol PVA gel slice is a PVA gel slice embedded with guaiacol. The solid enzyme type time-temperature indicator provided by the invention has the beneficial effects that the solid enzyme type time-temperature indicator can be used for indication of freshness of food with the activation energy of 9.5-68.8kJ / mol, a hidden danger that leakage of a liquid-state TTI package can be easily caused can be completely eradicated, and an indicator does not need to be additionally added like lipase, amylase and urease; the method provided by the invention avoids the situation that using effect of TTI is influenced as diffusion of an enzyme and substrate is hindered by embedding and biological activity of the enzyme is reduced, and the PVA gel slices are used as a carrier, so that a system is uniformly mixed, color distributioh is also relatively uniform, lump and flocculent color blocks cannot be formed, and the solid enzyme type time-temperature indicator is easy to make, stable in effect, low in cost and easy to popularize.

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 continuously producing 5-nitroguaiacol sodium salt by using a micro-channel reaction device. The method comprises the following steps of: (1) pumping a guaiacol-acetic anhydride solution containing an acidic catalyst into a micro-channel reactor I for reaction to obtain an acetyl guaiacol solution; (2) respectively pumping the cooled acetyl guaiacol solution and a nitric acid-acetic acid mixed solution into a micro-channel reactor II simultaneously for reaction to obtain a 5-nitroacetyl guaiacol solution; (3) cooling the 5-nitroacetyl guaiacol solution, pouring the 5-nitroacetyl guaiacol solution into water for crystallization, performing filtering, and collecting filter residue to obtain a 5-nitroacetyl guaiacol wet product; and (4) adding the 5-nitroacetyl guaiacol wet product into a sodium hydroxide solution, carrying out heating reaction, at the end of the reaction, conducting cooling, crystallizing and filtering, collecting the filter residue,and performing drying to obtain the 5-nitroguaiacol sodium salt. According to the method, the utilization rate of acetic anhydride reaches 95% or above, the nitration reaction yield is increased to 90% or above, and the three-step yield of 5-nitroguaiacol sodium salt is 80% or above.

The invention provides a preparation method of a composition for regulating and controlling excessive sebum secretion. The preparation method comprises the following steps: providing a spiraea ulmus extract, dipeptide-15, a phellinus igniarius extract, ethyl diiminomethyl guaiacol manganese chloride and water; and mixing the spiraea elm extract, the dipeptide-15, the phellinus linteus extract, the ethyl diimino methyl guaiacol manganese chloride and the water to obtain the composition for regulating and controlling the excessive secretion of sebum, the composition for regulating and controlling excessive sebum secretion comprises the following components in percentage by mass: 0.0001-1% of a spiraea ulmus extract, 0.0001-10% of dipeptide-15, 0.0001-5% of a phellinus linteus extract, 0.0001-0.1% of ethyl bis-imino methyl guaiacol manganese chloride, 0.0001-0.1% of an antioxidant, 0.0001-0.1% of a preservative, 0.0001-0.1% of a preservative, 0.0001-0.1% of a pH regulator and the balance of water. The mass percent content of the water is 89.9997%-99.8997%. The invention also provides a composition and a cosmetic for regulating and controlling excessive sebum secretion.

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 discloses a method for catalyzing conversion of lignin into guaiacol as a single chemical by lewis acid. According to the method, the lignin is catalyzed to be converted into the guaiacol in an inert atmosphere with lewis acid as a catalyst, and the guaiacol is the only liquid product. The lewis acid comprises at least one of iron trifluoromethanesulfonate, ytterbium trifluoromethanesulfonate and lanthanum trifluoromethanesulfonate. According to the method, the catalytic system is simple in composition and green, the liquid product yield is high, only guaiacol is a liquid product, and other residues are solids. The invention provides a new way for preparing the guaiacol, provides a new method for preparing high value-added platform molecules, especially important chemicals from a traditional fossil resource route, for oriented conversion of lignin, and also provides a new thought for resource utilization of lignin. The method is a green and sustainable lignin carbon resource catalytic conversion strategy, and the dependence of chemical industry on fossil resources can be reduced.

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.

The invention provides a synthesis method of 2-(2-methoxyphenoxy)ethylamine, and belongs to the technical field of organic synthesis. According to the invention, guaiacol, urea and ethanolamine are taken as starting raw materials, and the 2-(2-methoxyphenoxy)ethylamine is synthesized by completing a three-step reaction through a 'one-pot method'. The invention provides a brand new synthesis thought of 2-(2-methoxyphenoxy)ethylamine, innovatively avoids direct use of expensive 2-oxazolidinone, uses urea and ethanolamine to synthesize 2-oxazolidinone, and then directly reacts with guaiacol under the catalysis of alkali to generate 2-(2-methoxyphenoxy)ethylamine.