16 results about "Ethyl-phenol" patented technology

The invention relates to the field of fire-resistant oil, in particular to phosphate-based fire-resistant oil with synergistically optimized flame resistance and stability and a preparation method of the phosphate-based fire-resistant oil. The fire-resistant oil comprises base oil and an additive, the base oil is a mixture obtained by esterification of mixed alkylphenol and phosphorus oxychloride; the molar percentage of the mixed alkylphenol is as follows: 4-6% of phenol; 11 to 14 percent of p-methylphenol; 22 to 26 percent of 2, 5-position dimethyl phenol; 0.8 to 1.5 percent of 2, 4-position dimethyl phenol; 2.5 to 4 percent of 2, 3-position dimethyl phenol; 0.4 to 0.6 percent of 4-ethyl phenol; 40 to 48 percent of 3, 5-position dimethyl phenol; 8 to 11% of 3-ethyl phenol; 3 to 5 percent of 3, 4-position dimethyl phenol; the additives comprise an antioxidant, a corrosion inhibitor, an anti-foaming agent and an anti-hydrolysis agent; the addition amount of the antioxidant is 0.05-5% of the total mass of the base oil; the addition amount of the corrosion inhibitor is 0.001%-0.08% of the total mass of the base oil; the addition amount of the anti-foaming agent is 0.001%-0.009% of the total mass of the base oil; the addition amount of the anti-hydrolysis agent is 0.001%-0.005% of the total mass of the base oil. The fire-resistant oil provided by the invention can be safely used under the working conditions of high temperature and extreme pressure.

The invention discloses a bacterial strain for broad-spectrum degradation of organic pollutants and application of the bacterial strain, the bacterial strain is classified and named as Acinetobacter venetianus, the bacterial strain number is GXGD-YZ-2508, the bacterial strain is preserved in Guangdong Microbial Culture Collection Center on August 27, 2025, the preservation number is GDMCC No: 66869, and the preservation address is the fifth floor, No. 59 building, No. 100 Courtyard, Xianlie Middle Road, Guangzhou City, Guangdong Province. The strain can grow under the condition that the salinity is 3wt%, can efficiently degrade 4-ethylphenol (4-EP), 2, 4-di-tert-butylphenol (2, 4-DTBP) and terephthalic acid (PTA), is suitable for biological treatment of aromatic pollutant-containing wastewater such as refining wastewater and PTA production wastewater, and has the advantages of high treatment efficiency, strong environmental adaptability and the like. The invention provides a novel microbial resource and an effective technical support for biological treatment of refractory aromatic pollutants, and has a wide application prospect.

This invention provides a fermentation method to enhance the aged and woody aroma of Fu brick tea, belonging to the field of Fu brick tea processing technology. Based on *Aspergillus chevaleri*, a strain deposited at the China General Microbiological Culture Collection Center (CGMCC No. 42256), the method involves adding plant-derived methyl selenide, such as selenium-enriched freeze-dried rapeseed powder, to black tea to adjust the total selenium content. After inoculation, fermentation is carried out, followed by drying. The resulting Fu brick tea exhibits significantly increased levels of characteristic aged and woody aroma substances, such as 4-ethylphenol and 1,2,3-methoxybenzene, exhibiting a mellow and robust aged and woody aroma. This invention uses plant-derived methyl selenide instead of chemical selenium additives, eliminating the need to change the fermentation strain and process parameters. The intensity of the aged and woody aroma can be precisely controlled simply by adjusting the amount of naturally selenium-enriched raw materials. The process is simple, controllable, and the product is natural and safe, fully meeting the food safety requirements for tea, making it highly suitable for large-scale industrial production.

The invention belongs to the technical field of organic synthesis and separation, and particularly relates to a method for synthesizing phenolic resin from mixed phenol containing 2, 4, 6-tricresol. The invention provides a method for synthesizing phenolic resin from mixed phenol containing 2, 4, 6-tricresyl, which specifically comprises the following steps: adding a first phenol component, a phenolic material containing 2, 4, 6-tricresyl, formaldehyde and a catalyst into a reactor, starting stirring, heating, carrying out heat preservation reaction, sampling and analyzing that p-ethyl phenol is less than or equal to 5% and is qualified, heating, decompressing and dehydrating, and evaporating out unreacted 2, 4, 6-tricresyl to obtain a second phenol component containing 2, 4, 6-tricresyl; adding 2, 3, 6-tricresol, p-ethyl phenol, water and the like, and dehydrating to obtain phenolic resin; adding a catalyst into the steamed material, heating to completely react unreacted p-ethyl phenol (when formaldehyde in the steamed material is insufficient, a small amount of formaldehyde can be supplemented), adding a non-water-soluble solvent for extraction and layering, and treating a water layer in a wastewater treatment workshop; and adding an oil layer into a rectifying tower, and rectifying to obtain 99% 2, 4, 6-tricresol.

The present application relates to a kind of process for recovering beta-phenylethanol from propylene oxide / styrene plant waste liquid;PO / SM device waste liquid contains 40-80% beta-phenylethanol, the byproduct is subjected to heavy removal, washing, phenol removal, rectification, stripping, i.e. high-purity beta-phenylethanol can be obtained, product purity >99.95%, total impurities of organic matter <200ppm, single impurity <50ppm, key impurity ethyl phenol content is not detected;Product smell is soft, can be used in downstream flavor field;Purification process flow is simple, conducive to the value of industrial chain.

The present application relates to a kind of 4-(2,2,2-trifluoro-1-alkoxyethyl) phenol preparation method, it is suitable for process amplification, for industrial production, the feature of preparation method is that, including: step (1), with trifluoro-1-(4-hydroxyphenyl) ethanone as raw material, preparation intermediate A, and, step (2), intermediate A prepared in step (1) is dissolved or dispersed in alkanol B, reaction is carried out in the presence of basic substance, 4-(2,2,2-trifluoro-1-alkoxyethyl) phenol is prepared, the reaction temperature of the reaction is 50~80 DEG C, reaction time is within 3 hours.

The application discloses a kind of high fruit aroma low sour taste flavor beer and its brewing method, belong to beer technical field.The technical scheme includes that flavor beer original wort concentration is 15-18 °P, alcohol content is 6.0-7.0%vol, colority is 10-25EBC, bitterness content is 10-15BU, pH is 3.8-4.1, total ester content is 60-90mg / L, alcohol ester ratio is 0.5-0.7, 4-ethylphenol content is 200-300mg / L, 4-ethylguaiacol content is 100-200mg / L, 4-ethylphenol:4-ethylguaiacol is 1.5-2.0;After sensory evaluation, flavor beer has rich tropical fruit flavor, stable flavor, low sour taste, balanced and soft taste during fermentation process.The application is applied to high fruit aroma low sour taste flavor beer brewing aspect, solve the problem that traditional sour beer fermentation product is strong, and flavor is unstable during fermentation process, can output such as isopentanoic acid and is considered as "putrefactive flavor" product, has rich tropical fruit flavor, stable flavor, low sour taste, balanced and soft taste.

The application belongs to the field of fine chemical industry, and discloses a deprotection method of p-tert-butoxyphenethyl methyl ether, which comprises the following steps: heating p-tert-butoxyphenethyl methyl ether under the action of a solid acid catalyst to perform a deprotection reaction, so as to obtain p-(2-methoxy)ethyl phenol; the solid acid catalyst comprises aluminum phosphate and basic metal oxides modified on the aluminum phosphate, and the metal elements contained in the basic metal oxides include one or more of K, Ca, Na, Ba or Mg. The application has the advantages of less three-waste emissions, low operation cost, high production efficiency, and can be used for continuous production of p-(2-methoxy)ethyl phenol, and higher temperature and higher air speed can be adopted.

This invention relates to (S)-4-[2-(Boc-amino)-1-hydroxyethyl]-2-nitrophenol and its preparation method, belonging to the field of organic synthesis technology. The preparation method of this invention includes the following steps: adding 4-(1-hydroxy-2-aminoethyl)phenol hydrochloride substrate to an alcohol solvent, reacting with alkali and R-(-)-camphor-10-sulfonic acid to obtain product A; adding product A to a solvent, adding 65-68% nitric acid by mass, and reacting at room temperature to obtain product B; adding product B to a solvent, reacting with alkali and di-tert-butyl dicarbonate to obtain the (S)-4-[2-(Boc-amino)-1-hydroxyethyl]-2-nitrophenol. The preparation method of this invention does not require chiral resolution, has mild conditions, low equipment requirements, few side reactions, and precise material ratios in each step, making it suitable for scale-up production and enabling stable and efficient synthesis of the target compound.

The application discloses a method for extracting methyl ethyl phenol from crude phenol refining residues and synthesizing tertiary butyl phenol. The method directly produces linear methyl ethyl phenol aldehyde resin by utilizing the difference in reactivity of 3,4-methyl ethyl phenol mixture and formaldehyde; unreacted 3,4-methyl ethyl phenol / para-tertiary butyl phenol mixture and the like are evaporated out, and then the 3,4-methyl ethyl phenol / para-tertiary butyl phenol mixture is subjected to a tertiary butylation reaction, rectification, a de-tertiary butylation reaction and rectification to obtain high-quality products 3,4-methyl ethyl phenol, mono-tertiary butyl phenol and di-tertiary butyl phenol, so that the method is simple in process, convenient in operation, high in added value and capable of comprehensively utilizing waste.

The invention discloses a method for separating ethyl phenol from heavy oil, which comprises the following steps: (1) pretreatment: carrying out reduced pressure distillation on the heavy oil, and collecting fractions with the boiling point range of 180-240 DEG C to obtain phenol-enriched fractions; (2) extraction: mixing the phenol-enriched fraction obtained in the step (1) with an extraction agent for extraction and separation, wherein the extraction agent is a mixture of sulfolane and N-methyl pyrrolidone; (3) washing: washing the extracted extract phase with alkali liquor; and (4) separation and purification: carrying out reduced pressure distillation separation on the washed extract phase to obtain ethyl phenol. Heavy oil is pretreated through reduced pressure distillation, selective separation is achieved through a mixed extraction agent of sulfolane and N-methyl pyrrolidone, and ethyl phenol with the purity exceeding 95% is obtained through washing, reduced pressure distillation and rectification. The method is efficient, environment-friendly and low in cost, the extraction agent can be recycled, and the method has remarkable economic and environmental benefits.

The invention relates to a preparation method of 4-ethyl-2-methylphenol, which comprises the following steps: taking 4-ethylphenol and methanol as raw materials, and carrying out one-step methylation reaction in a fixed bed reactor by adopting an iron-based catalyst Fe2O3-Al2O3. The iron loading capacity of the catalyst is 8-12 wt%, the specific surface area is larger than or equal to 200 m / g, the reaction temperature is 350-380 DEG C, the pressure is 0.1-0.5 MPa, the molar ratio of 4-ethyl phenol to methanol is 1: 3, and the liquid hourly space velocity is 0.5-0.7 h <-1 >. And carrying out reduced pressure rectification on the reaction liquid to obtain a product, wherein the rectification temperature is 120-140 DEG C and the pressure is 10 mmHg. The deactivated catalyst can be regenerated by roasting 5% O2 / N2 mixed gas at 350 DEG C for 4 hours, and the activity recovery rate is greater than or equal to 95%. The method abandons the traditional acylation-reduction two-step process, avoids the use of noble metals and strong corrosive reagents, has the advantages of high selectivity (greater than or equal to 88%), less wastewater, low catalyst cost, continuous operation and the like, and is suitable for green industrial production.

The invention belongs to the technical field of organic waste liquid recovery and production of high-added-value fine chemicals, and relates to a method and a production system for recovering beta-phenethyl alcohol from waste liquid of a PO / SM device, the waste liquid generated by the PO / SM device contains 40-80% of beta-phenethyl alcohol, the waste liquid is subjected to film or short-range evaporation, melt crystallization and residual liquid concentration, high-purity beta-phenethyl alcohol is obtained, and the high-purity beta-phenethyl alcohol is obtained. The product purity is greater than or equal to 99.95%, the ethyl phenol content is less than or equal to 20ppm, and the organic impurity content is less than or equal to 500ppm; the product is colorless and transparent, and has good fragrance. The method is simple in recovery process, low in energy consumption, less in three wastes and high in purity, the byproduct waste liquid is turned into wealth, and the value of an industrial chain is improved.

The application discloses a method for separating m-p-cresol phenol oil fraction to obtain dephenol phenol oil and phenol, which comprises the following steps: refining phenol-containing coal tar to obtain m-p-cresol phenol oil fraction; removing ethyl in the m-p-cresol phenol oil fraction by catalytic deethylation of o-ethyl phenol to convert into phenol; refining the reaction liquid to obtain 99.5% phenol and pre-dephenol phenol; and catalytically methylating the pre-dephenol phenol in a fixed bed reactor to generate a mixture of 2,4,6-trimethyl phenol and 2,3,6-trimethyl phenol and the like; and refining the mixture to obtain the dephe-nol phenol, refined 2,4,6-trimethyl phenol and 2,3,6-trimethyl phenol in sequence, so as to realize the separation of the m-p-cresol phenol oil fraction.

The application provides a method for co-production of xanthene and ethyl phenol, and belongs to the technical field of organic chemical industry. The method is to use phenol and calcium carbide as raw materials, and to use calcium phenate as a catalyst to synthesize xanthene and ethyl phenol by heating reaction in an inert atmosphere and a closed reactor. The calcium carbide used in the method is widely available and low in price, and the method has the advantages of no need of additional catalyst and solvent, short route, high product yield and the like, and overcomes the problems in the prior art. In addition, the method co-produces xanthene and ethyl phenol, and significantly improves the economy of the traditional phenol alkylation process.

The application provides a preparation of a nitrogen-doped carbon-coated FeCoNi alloy catalyst, which comprises the following steps: (1) synthesis of a nitrogen-doped carbon material carrier; (2) synthesis of the nitrogen-doped carbon-coated FeCoNi alloy catalyst: (2.1) drying and dehydrating treatment of 0.5-1.0 g of the nitrogen-doped carbon material carrier for 12 h, and then cooling for standby; (2.2) dissolving nickel nitrate, cobalt nitrate and iron nitrate in water according to a mass ratio of 1:1:1 to prepare an impregnation solution, loading the impregnation solution on the surface of the nitrogen-doped carbon material carrier through ultrasonic vibration, and then placing the nitrogen-doped carbon material carrier in a vacuum drying box with a temperature of 80-100 DEG C for drying for 3-5 h; (2.3) after drying, cooling to room temperature, grinding into a powder, and then raising the temperature of a tube furnace to 600-800 DEG C at a speed of 3 DEG C / min under the condition of nitrogen, keeping calcination for 5-6 h, and then cooling, and the catalyst prepared by the application can convert lignin into phenols under mild conditions, the main product is 4-ethylphenol, the conversion rate is higher than 99%, and the selectivity is 68.6%.