51 results about "P-methoxybenzoic acid" patented technology

The present invention is related to concentrated aqueous solutions of p-methoxybenzoic acid and their production.

The invention relates to a scalp care and cleaning liquid composition containing fully natural components. The above cleaning liquid comprises 8.0-20wt% of Sapindus mukurossi Gaertn extract, 4.0-8.0wt% of crude tea saponin extract, 0.5-5.0wt% of cassava starch, 5.0-30wt% of a hair firming nutrition additive, 0-20wt% of an oil control and itch relieving additive, 0.2-0.4wt% of p-methoxybenzoic acid, 0.1-0.3wt% of Lonicera japonica extract, and the balance of water. The scalp care and cleaning liquid has basic scalp/hair cleaning effects, has excellent efficacies of scalp maintaining, alopecia inhibiting and/or oil controlling and itch relieving, and has no side effects after long term use.

The invention provides a process for synthesizing p-methoxy benzaldehyde or p-tertbutyl benzaldehyde. The process comprises the following steps of: adding an acidifying agent glacial acetic acid and catalysts cobalt acetate and sodium bromide into p-methoxy methylbenzene or p-tertbutyl methylbenzene, introducing oxygen to perform oxidation reaction under a heating condition, and after the reaction, washing feed liquid with water for twice to remove the catalysts and the acetic acid; adding an oil phase after washing into a high-boiling-point solvent, and then performing rectification under vacuum step by step; unmixing and steaming out excessive p-methoxy methylbenzene or p-tertbutyl methylbenzene, then increasing the vacuum degree and the temperature, and collecting a gas-phase condensate to obtain the p-methoxy benzaldehyde or p-tertbutyl benzaldehyde; and continuously raising the rectification temperature, and receiving the gas-phase condensate with water, and performing recrystallization for twice to obtain p-methoxy benzoic acid or p-tertbutyl benzoic acid. According to the process, the discharge of waste water is reduced, the generation of the waste water containing sodium sulfate is avoided, and meanwhile, methylbenzene is not used for extracting the p-methoxy benzoic acid or p-tertbutyl benzoic acid, so that the pollution of the methylbenzene to the environment is reduced.

The invention relates to a co-production method for preparing corresponding alcohol, ester, aldehyde and acid by oxidizing p-methoxyl methylbenzene by oxygen. The method comprises the following steps: adding p-methoxyl methylbenzene, a catalyst I and a solvent into an oxidizing reaction kettle, and introducing oxygen to react; after oxidizing reaction, recovering the solvent and optionally selecting to apply mechanically, and then adding water to wash the catalyst I to obtain an organic phase I and an aqueous phase I; adding alkali into the organic phase I, decompressing and evaporating an organic phase II, after adding water to the bottom, adjusting the pH value by an acid, and filtering to obtain p-methoxybenzoic acid; distilling the water phase I to recover water, optionally selecting to apply mechanically, further adding the catalyst I and the solvent at the bottom, and optionally selecting to apply mechanically in oxidizing reaction; rectifying the organic phase II to obtain a product p-methoxybenzaldehyde and anisyl acetate; carrying out basic hydrolysis on anisyl acetate to obtain an anisic alcohol crude product; and rectifying to obtain an anisic alcohol pure product. The co-production method provided by the invention has the advantages of greenness and environment protection, mild reaction condition, low cost and less three waste, and is easy to industrially produce, and the obtained product is widely applied to the fields of foods, medicines and daily chemicals.

The invention relates to a preparation method of p-anisoyl chloride and belongs to the technical field of carbocyclic compounds. The preparation method comprises the following steps that raw materials of benzotrichloride and p-methoxybenzoic acid are mixed by stirring according to a mole ratio of 1: 1; the mixture undergoes an acyl chlonnation reaction in the presence of a lewis acid catalyst at a temperature of 100 to 150 DEG C for 5 to 10 hours; acyl chlonnation reaction products are cooled to a temperature of 20+/-5 DEG C; the cooled acyl chlonnation reaction products are added with hydroquinone and then are purified so that p-anisoyl chloride and a by-product are obtained. Through the preparation method, low-cost, low-pollution and high-yield p-anisoyl chloride can be synthesized directly and simultaneously, the by-product of benzoyl chloride is obtained. In addition, the preparation method has the advantages that 1, tail gas produced by the preparation method can be absorbed by water and then is prepared into hydrochloric acid for recycle so that environmental pollution is reduced; and 2, the raw materials adopted by the preparation method do not corrode equipment so that an equipment loss is reduced.

The invention discloses a chemical additive for improving the recovery ratio of a high-deep thickened oil CO2 gas flooding process. The chemical additive consists of a solubilizer and a viscosity reducer, and the weight ratio of the solubilizer to the viscosity reducer is (1-6):1, wherein wherein the solubilizer is a p-methyl benzoate compound and the viscosity reducer is a long-chain methacrylate-styrene-vinyl acetate copolymer. The chemical additive disclosed by the invention not only can enhance the capacity of CO2 of dissolving in thickened oil, reduce the minimum mixed-phase pressure between the thickened oil and the CO2, and form CO2 mixed-phase displacement, but also can greatly reduce the viscosity of the thickened oil, and improve the flowing property of the thickened oil, so thatthe recovery ratio of the thickened oil can be improved. The chemical additive has the advantages of high efficiency, high economical efficiency, low energy consumption and the like, and is especially suitable for high-deep low-permeability reservoirs with high formation pressure, high crude oil viscosity and low permeability, and has a wide application prospect.

The invention relates to a method for preparing p-methoxybenzaldehyde by p-methoxybenzoic acid, which comprises the following steps: adding p-methoxybenzoic acid, o-phenylenediamine and a solvent in a condensation reaction kettle, wherein a catalyst is not used in the step, performing backflow water distribution when no water is generated; cooling, filtering to obtain 2-(4-methoxyphenyl)benzimidazole; adding a catalyst, absolute methanol and 2-(4-methoxyphenyl)benzimidazole in a hydrogenation reaction vessel, setting reaction temperature and hydrogen pressure, performing a hydrogenation reaction when hydrogen is unabsorbed, cooling to room temperature; recovering methanol from a filtrate, adding a sulfuric acid aqueous solution, performing backflow for reaction, then cooling to the temperature of 60-65 DEG C, separating the liquid to obtain an oil layer and a water layer, washing the oil layer to neutrality, and rectifying to obtain the final product. The preparation method has the advantages of mild reaction condition, low cost, less three wastes and easy realization of industrial production.

The invention discloses nopinic alkyl beta-dione boron difluoride complexes and a preparation method and application thereof. The natural reusable resource beta-pinene oxidation product, namely nopinone, is used as a raw material to prepare novel nopinic alkyl beta-dione boron difluoride complexes 3a and 3b; nopinone is subjected to Claisen condensation with methyl p-methoxybenzoate 1a and methyl4-bromobenzoate 1b to separately obtain nopinic alkyl beta-dione compounds 2a and 2b; the compounds 2a and 2 b are subjected to complexing with boron trifluoride etherate to separately obtain nopinicalkyl beta-dione boron difluoride complexes 3a and 3b. The nopinic alkyl beta-dione boron difluoride complexes 3a and 3b have good fluorescent performance and high fluorescent quantum yield; an electroluminescent device made with the nopinic alkyl beta-dione boron difluoride complexes can emit blue-green light. It is shown that the nopinic alkyl beta-dione boron difluoride complexes as light-emitting materials have good application value in the preparation of electroluminescent devices.

The invention discloses a new synthesis process of a new antineoplastic drug INK128, which comprises the following steps: acylating the initial raw material p-methoxybenzoic acid, reacting with malononitrile, methylating to cyclize with hydrazine hydrate to obtain 3-amino-5-(4-methoxyphenyl)-pyrazolyl-4-nitrile, purifying by crystallization, heating to cyclize with formamide to obtain the target mother cycle, alkylating, nitrifying, deprotecting, reducing, and finally, cyclizing with cyanogen bromide.

The invention relates to a high-strength long-service-life titanium-silver backboard of a household appliance. The high-strength long-service-life titanium-silver backboard is sequentially provided with a titanium-silver white refined coating, a joining layer, a titanium-silver white pre-coating, a first passivation layer, a galvanized plate, a second passivation layer and a titanium-silver white back coating, wherein the titanium-silver white refined coating comprises polyamide resin, silver powder, silver oxide, titanium dioxide and a surfactant; the titanium-silver white back coating comprises polyester resin, aluminum powder, zinc oxide, titanium dioxide and a surfactant; and the joining layer comprises a propyne-butyl acrylate copolymer, polyethylene glycol and octyl p-methoxybenzoate. Through improving the structure and formula of the coating of the backboard of the household appliance according to the scheme, not only is the favorable bending processability of the backboard not influenced, but also the backboard has the characteristics of acid and alkaline resistance, solvent resistance and ageing resistance and can still keep relatively high coating bonding strength if being in a humid environment or under a relatively large temperature difference condition for a long term, and the coating is good in substrate adhesive force, incapable of losing the luster, free of dust accumulation on the surface and free of pulverizing, cracking or blistering phenomenon if being used for a long term.

The invention relates to an environment-friendly high-heat-dissipation titanium silver home appliance backing plate. The environment-friendly high-heat-dissipation titanium silver home appliance backing plate is sequentially provided with a titanium silver fine coating, a heat-dissipation linkage layer, a titanium silver pre-coating, a first passivation layer, a galvanized plate, a second passivation layer and a titanium silver back coating from top to bottom; the titanium silver fine coating comprises polyurethane resin, silver powder, zirconium carbide, titanium dioxide and surfactants; the titanium silver back coating comprises epoxy resin, zirconium powder, scandium oxide, titanium carbide and the surfactants; the heat-dissipation linkage layer comprises propylene-ethyl hexyl acrylate copolymer, glycerin, p-methoxybenzoic acid essien ester, silver nanowires and nickel nanowires. According to the environment-friendly high-heat-dissipation titanium silver home appliance backing plate, due to the fact that improvements are conducted on the coating structure of the home appliance backing plate and the coating formula, the corrosion resistance, the high-heat-dissipation property and the anti-aging property of the backing plate are improved, high coating bonding strength can still be maintained for a long time in the damp environment or when the temperature difference is larger, the heat-dissipation efficiency is high, the surface of the coating is not prone to dirt retention, pulverization and cracking do not occur after long time use, and the bubbling phenomenon does not exist.

The invention provides a preparation method of p-anisoyl chloride, and belongs to the technical field of carbon compounds. The method comprises the steps that p-anisic acid serves as the raw material, BTC/C2H4Cl2 serves as a reagent of sulfonyl chlorination, an initiator is added, a reaction is conducted at the reflux temperature, and the p-anisoyl chloride is prepared. According to the preparation method of the p-anisoyl chloride, the reaction condition is mild, the technology is simple, operation is easy, the purity and yield of obtained products are high, and the preparation method of the p-anisoyl chloride is suitable for industrial production.

The invention discloses a TN type liquid crystal material mixture which belongs to the chemical field. The mixture comprises 16 percent of propylbenzoic acid para-pentyl phenolic ester, 5 percent of pentylbiphenyl nitrile, 19 percent of para-methoxybenzoic acid para-pentyl phenolic ester, 4 percent of p-toluic acid para-pentyl phenolic ester, 10 percent of para-pentyl benzoic acid para-pentyl phenolic ester, 4 percent of para-pentyl benzoic acid para-cyano diphenol ester, 17 percent of trans-ethyl cyclohexyl acid para-cyano diphenol ester, 10 percent of p-ethylbenzoic acid para-cyano diphenol ester and 15 percent of para-pentyl benzoic acid para-cyano diphenol ester. Through the improvement of the formula of TN type liquid crystal mixed material, the biphenyl nitriles liquid crystal with higher cost in present formula is removed and is substituted by ester liquid crystal with relative low price. Under the premise that the parameters of mixed crystal all satisfy the display requirement, the production cost is lowered effectively. And the requirements of liquid crystal display manufacturers are satisfied.

The invention relates to a thermal link for an electric cooker. The thermal link comprises a metal shell, temperature-sensitive particles, a front gasket, a back gasket, drum-shaped springs, a breaking electrode, breaking springs, porcelain beads, rivet lines and contact lines, wherein metal shell ports at the joints of the contact lines and the porcelain beads are sealed with epoxy resin. The thermal link is characterized in that the temperature-sensitive particles comprise the following components in percentage by weight: 40-60 percent of p-methoxybenzoic acid, 10-40 percent of hexanedioic acid and 5-30 percent of mannitol. The thermal link for the electric cooker has the advantage of optimal melting temperature.

The related CE inner-scaling analysis method for the impurity in fine TPA comprises: selecting one of PPA, PMXPA and PTBBA as the inner scale, and quantitative analyzing the impurity content in the fine TPA. This invention is simple and fast for real-time monitor and analysis.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for preparing a [60] fullerene dihydropyridine-3-ketone derivative based on catalysis of p-methoxybenzoic acid and copper acetate and a product. According to the method, [60] fullerene and an arylethylamine derivative are taken as raw materials, p-methoxybenzoic acid and copper acetate are taken as catalysts, o-dichlorobenzene is taken as a solvent, and the [60] fullerene dihydropyridine-3-ketone derivative is obtained through oil bath heating reaction in air. The novel fullerene dihydropyridine-3-ketone derivative is prepared by reacting [60] fullerene with the arylethylamine derivative, so that the yield of a target product is increased, and the selectivity of the product is improved.

The invention relates to 2-methyl-3,4-binitro-5-(methoxyphenyl) pyrazole, and belongs to the field of chemical synthesis. By aiming at the problems that the conventional pyrazole compound containing nitryl and benzene rings has poor heat stability and can be easily thermally decomposed, the method adopts the technical scheme that methyl p-methoxybenzoate and methylbenzene are subjected to water bath heating to take reaction with sodium hydride; meanwhile, acetonitrile is dripped for preparing 3-carbonyl-p-methoxyphenyl propionitrile; then, through the reaction of the glacial acetic acid, the iodine and the sulfuric acid solution containing iodic acid, 1-methyl-3,4,5-tniodide pyrazole is prepared; then, the 1-methyl-3,4,5-tniodide pyrazole is subjected to nitrification to prepare 1-methyl-3,4,5-trinitro pyrazole; finally, the 1-methyl-3,4,5-trinitro pyrazole and the 3-methyl-3,4-binitro-5-(methoxyphenyl) pyrazole are subjected to water bath heating reaction; the 2-methyl-3,4-binitro-5-(methoxyphenyl) pyrazole is prepared and obtained through thin layer chromatographic reaction detection. Compared with an ordinary pyrazole compound containing nitryl and benzene rings, the 2-methyl-3,4-binitro-5-(methoxyphenyl) pyrazole has the advantage that the thermal stability is improved by 50 to 60 percent.

The invention discloses a synthetic method of a methyl thiomethylene ester compound. According to the method, in the presence of nitrogen and alkali, a carboxylic acid compound reacts with an esterification reagent to form a methyl thiomethylene ester compound; wherein the esterification reagent is brominated dimethyl sulfonium; the alkali is organic alkali or inorganic alkali, and the carboxylic acid compound is p-methoxybenzoic acid, a benzoic acid derivative containing a substituent group on a benzene ring, conjugated carboxylic acid, amino acid and a carboxylic acid compound containing other functional groups or heteroatoms; the raw materials required by the method are simple and easy to obtain, the reaction conditions are simple and convenient, the method is green and energy-saving, the reaction yield is high, the compatibility of substrate functional groups is excellent, and the method has high application value.