10 results about "Phenol product" patented technology

The present application provides a method for extracting a phenol compound and a pyridine compound from naphthalene oil stepwise by using a deep eutectic solvent (DES). The method comprises: step 1, mixing a naphthalene oil with an alkane and a DES and performing liquid separation on the mixture to obtain a deep eutectic extraction phase and a solvent raffinate phase; step 2, mixing the deep eutectic extraction phase with a first back-extraction agent and filtering the mixture to obtain a first back-extraction phase and a recyclable DES; step 3, distilling the first back-extraction phase to obtain a heteroatom mixture, mixing the heteroatom mixture with a hydrogen-acceptor-type deep eutectic extraction agent and an alkane, and performing liquid separation on the mixture to obtain a deep eutectic phenol compound extraction phase and a pyridine compound and alkane raffinate phase; and step 4, mixing the phenol compound extraction phase with a second back-extraction agent and filtering the mixture to obtain a phenol-containing second back-extraction solution and a hydrogen-acceptor-type extraction agent. A phenol product is recovered from a second back-extraction agent solution by distillation. The DES is tetraethylammonium chloride, tetrabutylammonium chloride, tetrabutylammonium bromide or tetrabutylphosphonium bromide, and glycolic acid, oxalic acid, citric acid, or p-toluenesulfonic acid.

The present application relates to a kind of by phenol alkylation reaction preparation alkyl phenol method.The method uses anatase titanium dioxide as catalyst, phenol as reaction substrate, alcohol as alkylating agent, under nitrogen atmosphere, phenol alkylated product is obtained in one-step process.The reaction process is as follows:phenol, alcohol and solvent are mixed with catalyst, then put into pressure vessel, seal, and fill in protective gas, reaction temperature is higher than 280 DEG C, reaction time is longer than 4 hours, phenol is reacted into ortho α-C alkylated product.The method has simple reaction process, can be synthesized with high selectivity ortho straight-chain alkyl phenol product, catalyst is stable, easy to separate from reaction system and can be repeatedly used, with good industrial application prospect.

The method comprises the following steps: adding the activated curing agent into wastewater, controlling the temperature of the wastewater to be 45-60 DEG C, controlling the pH value of the wastewater to be 9-11, and then filtering to remove a solid phase so as to obtain a pretreatment solution; rectifying and separating the pretreatment liquid to obtain an ammonia water product and crude phenol water; adjusting the pH value of the crude phenol water to 4.5-6.5 by using inorganic acid, then removing insoluble substances separated out from the crude phenol water, and rectifying to remove hydrogen sulfide in the crude phenol water to obtain purified phenol water; extracting and purifying the phenol water by using an organic extracting agent to obtain purified water and a loaded organic phase; and recovering phenol from the loaded organic phase to obtain a phenol product, and returning the obtained regenerated extractant to purified phenol water for recycling. According to the scheme, the problems of coking and blocking in the conventional phenol-ammonia wastewater treatment process can be effectively solved, the energy consumption and medicament consumption in the deamination process are reduced, the formation of a third phase in the phenol extraction process is reduced, the purity of an ammonia water product and a phenol product is improved, and the pollutant removal rate of purified wastewater is improved.

The invention relates to the technical field of organic synthesis and chemical separation, in particular to a method for synthesizing phenolic resin and by-producing ortho-alkylphenol and para-alkylphenol, which is characterized in that high-activity meta-phenol and most phenol are systematically and preferentially reacted with formaldehyde by controlling the feeding sequence and reaction depth of reactants according to the difference of reaction rates of different phenols and formaldehyde; according to the method, a phenolic resin product is subjected to dehydration to generate a phenolic resin polymer, most of low-activity ortho-alkylphenol and para-alkylphenol are retained in unreacted substances due to slow reaction, the unreacted phenols and water are evaporated in the dehydration process, primary separation from the resin product is realized, and a small amount of formaldehyde and incompletely reacted meta-phenol still exist in the evaporated water phase; according to the method, the ortho-phenol and para-phenol are subjected to a further reaction to generate a water-soluble oligomer, so that meta-phenol impurities are effectively prevented from being mixed into a subsequent oil phase, high purity of ortho-phenol and para-phenol products is ensured, and finally separation from water and the water-soluble impurities is completed through solvent extraction.

This invention discloses a system and method for recovering organic matter from the concentrated coal gas water of a fixed-bed gasifier. The recovery system is structured as follows: a fixed-bed gasifier, a coal gas water heat exchanger, a scrubbing tower, and a heater are connected in sequence. The coal gas water outlet at the top of the heater is connected to the top of a humidification tower. The circulating water outlet at the bottom of the humidification tower is connected to the coal gas water inlet via a coal gas water circulation pipeline. The top of the humidification tower is connected to the bottom of the fixed-bed gasifier. The concentrated water inlet of a centrifugal extractor is connected to the coal gas water circulation pipeline, the solvent inlet is connected to a solvent tank, and the solvent phase outlet is connected to a fractionation tower. The top of the fractionation tower is connected to the solvent tank, and the bottom is connected to a crude phase intermediate product tank. Through this recovery system, the coal gas water produced during the coal gasification process is completely evaporated into water vapor to supply the gasifying agent in the gasifier. Most of the organic matter in the coal gas water is absorbed and separated by the solvent to obtain crude phenol products. The gasification workshop does not discharge coal gas water externally, and it is recovered and utilized as a resource.

This invention provides a method for preparing 2,4,6-tris[(3-dimethylaminopropyl)aminomethyl]phenol, comprising mixing phenol, N,N-dimethylaminopropylamine, a catalyst, and a solvent to obtain a mixture; adding an aqueous formaldehyde solution dropwise to the mixture; heating and maintaining the temperature until the reaction is complete after the addition is finished; purifying the reactants by acid-base extraction to obtain the 2,4,6-tris[(3-dimethylaminopropyl)aminomethyl]phenol product; wherein the catalyst is a Brønsted acid or a Lewis acid. This invention, by introducing a Brønsted acid or a Lewis acid as a catalyst, effectively reduces the activation energy of the Mannich reaction, inhibits side reactions such as hydroxymethylation, and improves the yield and purity of the target product; combined with the acid-base extraction purification process, the product yield can reach over 90%, the purity exceeds 97%, and the product has a light color and excellent appearance. The reaction conditions of this invention are mild and controllable, the reaction time is shortened, and the amount of waste emissions is low, making it suitable for large-scale industrial production.

The application discloses a method for synthesizing chlorinated phenol by catalytic chlorination, which comprises the following steps: reacting phenol with mixed gas of chlorine and air in water in the presence of a catalyst to obtain a chlorination reaction liquid, and then performing liquid separation and distillation dehydration on the chlorination reaction liquid to obtain a chlorinated phenol product. The method uses phenol as a raw material, and the reaction of the phenol with the mixed gas of chlorine and air in the presence of the catalyst can obviously improve the reaction rate while obtaining a higher reaction selectivity. After the improvement, pure oxygen and concentrated hydrochloric acid are no longer used, and a large amount of phenol-containing hydrochloric acid by-product is no longer generated, and the product quality and the product yield are greatly improved, and the method is more suitable for industrial large-scale production.

This invention provides a method for separating an oil-phenol mixture by in-situ extraction coupled with back-extraction and flash evaporation using ionic liquid. First, the oil-phenol mixture is countercurrently extracted in an extraction tower with a 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid to obtain a dephenolized oil and a phenol-containing extract. The extract then enters a back-extraction tower, where it is countercurrently contacted with low-carbon alkanes to remove most of the neutral oil, yielding a back-extraction extract and a back-extraction raffinate. The back-extraction raffinate is flashed in tank F1 to remove residual neutral oil, yielding a phenol-rich material; it is then flashed in tank F2 to obtain the phenol product and regenerate the ionic liquid extractant. The back-extraction extract is flashed in tank F3 to obtain a neutral oil-rich fraction and regenerate the back-extraction agent. The neutral oil-rich fraction is combined with the top product from tower F1 and returned to the extraction tower for phenol recovery. This invention features a simple and stable process with high separation efficiency, high phenol product purity, and a neutral oil content of less than 1%. The extractant and back-extraction agent used are reusable.

The invention discloses a preparation method of low-chromaticity 2.4. 6-tri (dimethylaminomethyl) phenol and an obtained product, and the preparation method of low-chromaticity 2.4. 6-tri (dimethylaminomethyl) phenol comprises the following steps: mixing liquid dimethylamine, liquid phenol and a formaldehyde aqueous solution, carrying out a liquid phase reaction, after the reaction is completed, carrying out heating aging, then carrying out standing layering, and discharging a lower-layer aqueous phase, so as to obtain the low-chromaticity 2.4. 6-tri (dimethylaminomethyl) phenol. And adding an acidic auxiliary agent into the retained organic phase, and heating again to remove moisture in the product to obtain 2.4. 6-tri (dimethylaminomethyl) phenol. The 2.4. 6-tri (dimethylaminomethyl) phenol prepared by the preparation method is low in product chroma, low in unit consumption, high in yield, stable in structure, simple, convenient and easy to operate, and suitable for industrial application.

The invention belongs to the field of coal tar processing, and particularly relates to a method for producing a crude phenol product by using coal tar as a raw material. The method comprises the following steps: by taking formamide as an extracting agent, separating phenol from raw material coal tar by adopting a multi-stage countercurrent extraction method to obtain first primary crude phenol; extracting the first primary crude phenol to remove neutral oil to obtain second primary crude phenol; separating phenol and formamide in the second primary crude phenol by adopting a reactive distillation method to obtain a crude phenol product and a mixed gas which is formed by decomposing the formamide and consists of CO and NH3; and separating the mixed gas by using a water washing method to obtain CO gas and ammonia water. According to the method, the purity of the crude phenol product is remarkably improved at low cost, and the method is suitable for a real coal tar system and has relatively high comprehensive utilization rate and economic benefit of coal tar.