37results about How to "Reduced phenolic content" patented technology

The invention discloses a method for oil and phenol removal from wastewater in field of coal chemical industry. The method is characterized in that in the wastewater containing oil and phenol generated in the coal chemical industry process, as the oil mostly is soluble oil, through combining wastewater pretreatment, extraction and oil and phenol removal and extraction agent recovery with related processes, a good oil and phenol removal effect is achieved, and the content of the soluble oil is effectively reduced. The invention further provides an extraction agent cyclohexane; and through a site test, the oil removal rate reaches 94.71-97.30 percent, the oil removal rate of the soluble oil reaches 87.08-92.81 percent, and the phenol removal rate reaches 96.94-98.21 percent, therefore, the effect is remarkable.

The invention discloses a method for preparing a phenolic resin. The method for preparing a phenolic resin of the present invention comprises: 1. The mass percentage is 55% to 65% of the total amount of phenol, 20% to 30% formaldehyde, and 20% of the weight of phenol %~50% of aromatic hydrocarbons and 0.2%~0.5% of oxalic acid are put into the reactor according to the ratio, and heated slowly to make it rise to the reflux temperature of 85°C-100°C; maintain it for 1.5-2.0 hours; 2. Cool to 80°C Below, add 0.4% to 0.6% of the total amount of hydrochloric acid with a mass concentration of 37%, reheat to the reflux temperature of 85°C-100°C, and maintain for 2.0-4.0 hours; 3. Cool to below 70°C, add the total amount of feed 0.2%~0.6% of the alkali solution with a mass concentration of 30% is neutralized until pH = 6.7-7.0; 4. Heating and reflux for water separation until the temperature exceeds 110°C, and the water separation ends; 5. Removal of aromatic hydrocarbons and phenol under reduced pressure , to the temperature ≥ 150 ° C, vacuum ≤ -0.9MPa, you can get the desired phenolic resin.

The invention discloses a comprehensive utilization method of phenolic resin wastewater, belonging to the technical field of processing wastewater produced in the fine chemical engineering industry. The comprehensive utilization method comprises the steps of: adding the phenolic resin wastewater, an acid catalyst and formaldehyde in a condensation polymerization kettle according to the proportion, raising the temperature until the phenolic resin wastewater, the acid catalyst and the formaldehyde are boiled, preserving temperature for reaction; then reducing the temperature in the kettle, pumping materials in the condensation polymerization kettle into a settlement separation kettle by using a pump to reduce the temperature and settle and demix; flowing a lower layer resin material of a settlement formed by demixing into a resin synthesis kettle through a pipeline, adding the acid catalyst and the formaldehyde, raising temperature and boiling for reaction, vacuum dewatering to obtain thermoplastic phenolic resin; and injecting one part of wastewater with content of the free phenol formed after the settlement formed in the condensation polymerization kettle, which is reduced to be below 1 percent, into a water borne resin synthesis kettle to be used for reducing water soluble resin, absorbing the formaldehyde in a primary and a secondary absorption towers one part of which is injected with industrial formaldehyde, and forming the industrial formaldehyde. The invention realizes the purpose that the phenolic resin industrial wastewater achieves zero emission.

The invention discloses a method of treating waste water including hydroxybenzene, including following steps: (1) synchronously adopting three segments target control method, a control method of mol ratio of hydroxybenzene to aldehyde and a timely separating method of resin and waste water, and processing a condensation polymerization of waste water in an acid condition with acid catalyst to produce resin with low molecular weight; (2) removing aldehyde of the waste water after the first treatment in an alkaline condition with alkaline catalyst and then processing an neutralization and deposition treatment; (3) adopting anaerobic and aerobic treatment to process a biochemical treatment of the waste water after the second treatment to meet emission requirements. The method meets the prescribed emission requirements of the hydroxybenzene-aldehyde resin waste water or waste water containing hydroxybenzen and has a simple art, a reliable operation, a low investment and a low operation fees and adequately utilizes the hydroxybenzene-aldehyde in the waste water.

The invention discloses a preparation method of DL-p-hydroxytrihydantoin. Phenol, sulfuric acid with a mass concentration of 98% and water were added to the reactor, and a certain concentration of sulfuric acid aqueous solution was used to catalyze the para-activity of phenol, then the catalyst with a total molar weight of 1 / 3 was added after heating, and urea was added. Add a certain amount of water; slowly add the total molar amount of 1 / 3 glyoxylic acid aqueous solution, the dropwise addition is completed, add the remaining total molar amount of 2 / 3 catalyst, after stirring, the reaction temperature is increased, and the remaining total molar amount is added dropwise. The molar weight is 2 / 3 glyoxylic acid aqueous solution, the dropwise addition is completed and the insulation is completed, and after cooling, the insulation is centrifugal suction filtration to retain the solid; the surface of the solid material is washed with hot water, washed to neutral pH, and dried. The invention improves the product yield and purity, reduces the phenol content in the mother liquor, reduces the amount of waste water, relieves the pressure of environmental protection, effectively suppresses the generation of the largest single impurity, and improves the product yield and quality.

The invention discloses a purification assistant for coal chemical industry production and application of the purification assistant in the coal chemical industry production. The purification assistant for the coal chemical industry production comprises the following components in parts by weight: 90-99 parts of ethoxylated oleamine and 1-5 parts of fatty amine. The purification assistant has the beneficial effects that (1) the content of suspended solids in ammonium hydroxide and phenol are greatly reduced, therefore the separation effects of coal tar and coal cinder in the ammonium hydroxide and phenol are preferable, consequently, the loss of the coal tar is reduced and the yield of the coal tar is increased; (2) the water content in the coal tar is reduced; (3) a great number of sediments such as oil slag in each tank body and an evaporator tank heat-exchanging system are cleaned, the blockage phenomenon is avoided, the system cleaning frequency is reduced, and the service life of equipment is prolonged; and (4) the COD (chemical oxygen demand) and phenol content in gasification wastewater are reduced, and raw coke oven gas is cleaned at the same time. Therefore, the purification assistant provided by the invention is a high-efficiency product capable of reducing viscosity of coal tar and reducing water content of an oil product.

The invention relates to the field of oil refining, and discloses a desulfurization treatment method of phenol-containing oil and desulfurated phenol-containing oil produced by the method. The method includes contacting the phenol-containing oil with a desulfurizing non-dephenolizing catalyst to perform treatment of desulfurizing without dephenolizing under a hydrogen condition. The desulfurizing non-dephenolizing catalyst comprises a carrier and an active metal component supported on the carrier. The carrier is one or at least two of zinc oxide, aluminum oxide and silicon oxide, and the active metal component is at least one of nickel, copper, palladium, platinum and ruthenium, wherein, based on the total weight of the desulfurizing non-dephenolizing catalyst, the content of the carrier is 80-98 wt%, and the content of the active metal component is 2-20 wt%. The hydrogen condition refers to that the reaction is carried out in a hydrogen atmosphere under normal pressure. The method in the invention can decrease the sulfur content to the utmost degree under a premise of decreasing the phenols content as little as possible, so as to enhance economic benefits to a greater degree.

The invention relates to a preparation comprising thermoplastic polyurethane produced at least from the following starting materials: (a) isocyanate, (b) a substance which is reactive toward isocyanate and which preferably comprises (c) chain extender and / or (d) catalyst and, as other starting materials, (e) additional and / or auxiliary substances, which are either added to the thermoplastic polyurethane during the production process and thus are comprised in the thermoplastic polyurethane and / or are comprised in the preparation in addition to the thermoplastic polyurethane, where at least one of the starting materials comprises a phenoxy group or a derivative of the phenoxy group, where the base number of the preparation or of the mixture of the thermoplastic polyurethane comprised in the preparation and of all of the other starting materials present is smaller than 2, and to corresponding production methods and uses.

The invention discloses a film dedusting device which comprises an inertial dedusting chamber, a film dedusting chamber, a back-flushing gas heater and at least a film dedusting pipe. The upper part of the inertial dedusting chamber is provided with a dust-laden gas inlet, and the bottom of the inertial dedusting chamber is provided with a first dust outlet. The top of the film dedusting chamber is equipped with a clean gas outlet, and the bottom of the film dedusting chamber is provided with a second dust outlet. The film dedusting pipes are arranged inside a cavity of the film dedusting chamber. The back-flushing gas heater is communicated with the film dedusting pipes. The film dedusting device is characterized in that the inertial dedusting chamber and the film dedusting chamber share a sidewall which is provided with at least a sidewall opening; and a baffle plate is arranged inside a cavity of the inertial dedusting chamber, opposite to the dust-laden gas inlet. According to a coal pyrolysis technology, high-temperature gas and dust separation is realized by the utilization of the film dedusting device. Thus, the problem of high dust content in tar and gas is solved. By the utilization of a multitubular rotary kiln, complete pyrolysis of 0-20 mm powdered coal is realized so as to obtain a high-quality product. By an oil wash device, content of phenol in wastewater is effectively reduced.

The invention relates to a fixed bed slag gasification furnace which comprises a furnace body. A special outlet pipe is arranged in the furnace body along the axial direction of the furnace body, thespecial outlet pipe comprises an upper small-diameter section, a middle extension section and a lower large-diameter section, the upper small-diameter section penetrates the top of the furnace body toform a high-temperature coal gas outlet, fire-resistant materials are arranged on the inner surface of the special outlet pipe, an annular cavity is formed between the side wall of the special outletpipe and the side wall of the furnace body, a feeding port communicated with the annular cavity is formed in the top of the furnace body, a low-temperature coal gas outlet communicated with the annular cavity is formed in the side wall of the furnace body, a funnel-shaped slag tank with uniform wall thickness is arranged at the bottom of the furnace body, a slag storage tank is firmly connected at the bottom of the slag tank, a plurality of gasifying agent sprayers are circumferentially and uniformly arranged on the side wall of the lower portion of the furnace body, and an included angle between each gasifying agent sprayer and a horizontal plane ranges from 0 degree to 90 degrees.