6results about How to "Reduce chroma" patented technology

This invention discloses a flash deodorization method for lanolin, belonging to the field of lanolin refining technology. The method includes: S101: dissolving crude lanolin in 4-6 times its volume of anhydrous hot ethanol, then sending it to the upper part of a vacuum flash evaporator and spraying it downwards; S102: introducing hot nitrogen gas at a temperature of 95-105℃ into the lower part of the vacuum flash evaporator, with the nitrogen gas in countercurrent contact with the crude lanolin spray solution; S103: after circulating and spraying the crude lanolin in the vacuum flash evaporator for a certain period, sending it to a first oil-water separator for cooling, separating the ethanol to obtain lanolin. The exhaust gas from the vacuum flash evaporator is sequentially sent to a power wave tower, a condenser, a gas-liquid separator, and a vacuum device; anhydrous ethanol is circulated and sprayed in the power wave tower, with the spray solution temperature at 45-50℃. This patented method can deodorize lanolin to odorless levels and also has the advantages of significantly reducing color and achieving a high yield.

This invention provides a process for the recycling and treatment of high-salinity wastewater, relating to the field of wastewater treatment technology. The process includes: Step 1: Analyzing the organic composition of various high-salinity wastewaters to determine the composition and content of materials; Step 2: Developing corresponding treatment plans for the specific components of each high-salinity wastewater; Step 3: Treating the high-salinity wastewater according to the treatment plan, and adjusting and optimizing the plan to remove organic matter and reduce the color of the high-salinity wastewater; Step 4: Evaporating the treated wastewater to precipitate salt, preparing qualified by-product salt or by-product sodium sulfite. Compared to traditional methods of removing organic matter from wastewater such as Fenton oxidation and biochemical processes, this invention is cleaner, more environmentally friendly, and more effective, significantly reducing the treatment cost of high-salinity wastewater.

The present application relates to a kind of methyl hexahydrophthalic anhydride preparation method, comprising the following steps: with the refined methyl tetrahydrophthalic anhydride that is not isomerized as raw material, raw material and hydrogen are sent into ebullated bed hydrogenation reactor, then special catalyst is added to carry out hydrogenation;Waste hydrogen and methyl tetrahydrophthalic anhydride light component are taken out by gas phase from the top of reactor, waste catalyst is taken out from the bottom of reactor, and the hydrogenation product crude methyl hexahydrophthalic anhydride is taken out by pump control liquid level from the side of reactor;Crude methyl hexahydrophthalic anhydride is sent into the separation device with thin film evaporator and is subjected to vacuum distillation, and finished product methyl hexahydrophthalic anhydride is obtained.The catalyst used in the present application has moderate activity, high hydrogenation efficiency;Catalyst and product have no separation process, less loss, low safety risk;Post-treatment process has high heat transfer efficiency, short residence time, low colority;Product has less by-product, high yield, stable acid value and anhydride group content, and excellent performance.

The present application relates to sewage treatment agent technical field, specifically relates to a kind of aluminum manganese composite coagulant and its preparation method and application.The preparation method provided by the present application includes the following steps: aluminum salt, manganese salt are dissolved, to obtain the solution containing aluminum salt and manganese salt;The solution containing aluminum salt and manganese salt, first mixing of alkaline solution, to obtain first mixed liquor;The first mixed liquor, sodium silicate solution and polyacrylamide solution are second mixed, and the second mixed liquor obtained is cured to obtain aluminum manganese composite coagulant.The aluminum manganese composite coagulant obtained by the preparation method of the present application has a more extensive pH adaptation range, improves the ability to remove natural organic matter, and can also reduce the color problem caused by manganese residue.Moreover, it is extremely easy to flocculate and settle during water treatment, which can reduce chemical residues.

The application discloses a process for treating dyeing wastewater by a membrane method, and comprises the following steps: pretreating the dyeing wastewater, including grating, adjusting pool, coagulation and sedimentation, and filtration, to obtain filtered wastewater; the filtered wastewater enters a security filter to be subjected to secondary filtration, to obtain secondary filtered wastewater; the secondary filtered wastewater enters an NXF membrane system, and the wastewater is divided into two streams, one of which is a concentrated solution which does not reach a set concentration, and the other of which is a permeate; the concentrated solution which does not reach the set concentration returns to a front end inlet to be subjected to filtration in the NXF membrane system again; when the concentration reaches the set concentration, the concentrated solution enters a concentration storage tank to be subjected to other treatment; and the permeate enters subsequent treatment. The application aims at solving the technical problem of poor treatment effect of dyeing wastewater.

The present application relates to the field of environmental protection and sewage treatment technology, and discloses a kind of kitchen slurry anaerobic fermentation combined ozone high-efficiency membrane separation method and system.The method comprises the following steps: (1) the kitchen slurry is subjected to anaerobic fermentation in an anaerobic fermentation unit, and then introduced into a filter press unit for pretreatment to remove filter residue, obtaining a mixture I; (2) the mixture I is subjected to primary ozone oxidation, obtaining a mixture II; (3) the mixture II is introduced into a membrane separation unit for separation and concentration, obtaining clean water and concentrated water; (4) the clean water is subjected to secondary ozone oxidation, obtaining effluent.The method provided by the present application can realize stable operation of a high-efficiency anaerobic reactor by selecting a membrane, controlling the operation mode of a membrane assembly, and coupling with an anaerobic fermentation process and a two-stage ozone oxidation process, effectively removing pollutants while reducing membrane fouling problems and sludge digestion problems.