5 results about "Phenol product" patented technology

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.