8results about How to "Efficient decolorization" patented technology

The invention belongs to the technical field of chemical engineering, and particularly provides a crude n-butyl alcohol purification method and system.The purification method comprises the steps that crude n-butyl alcohol to be purified is input into a dehydration device, dehydration is conducted through membrane separation, and a first mixture is obtained; after preheating, carrying out hydrogenation reaction under the action of a catalyst to obtain a second mixture; performing reduced-pressure flash evaporation on the second mixture in a gas-liquid separation tank to obtain a third mixture; and rectifying the third mixture in a rectifying tower to obtain purified n-butyl alcohol. According to the method, unsaturated coloring functional groups in the crude n-butyl alcohol are efficiently removed through the modified low-load Pd-C catalyst, the difficulty of rectification separation is reduced, the purified n-butyl alcohol meets the requirements of GB / T6027-2023 for color number and sulfuric acid color development test key indexes, the method has the advantages of being simple in production process and low in energy consumption, and the method is suitable for industrial production. The method has great industrial application value.

The invention relates to a method for preparing decolorized beta-alanine and application of the decolorized beta-alanine. The method for preparing the decolorized beta-alanine comprises the following steps: mixing an aspartic acid decarboxylase solution with activated carbon to obtain pretreated aspartic acid decarboxylase; mixing the pre-pretreated aspartic acid decarboxylase with aspartic acid for reaction to obtain decolored beta-alanine, or mixing an aspartic acid transaminase solution with activated carbon to obtain pretreated aspartic acid transaminase, and carrying out reaction on the pretreated aspartic acid transaminase and the decolored beta-alanine to obtain decolored beta-alanine. And mixing the pretreated aspartic acid decarboxylase with pretreated aspartic acid transaminase, fumaric acid and ammonia water, and carrying out a reaction so as to obtain the decolored beta-alanine. According to the method, the enzyme required by beta-alanine production is pretreated by using the activated carbon, so that the thermal stability of the enzyme is improved, the enzyme has more lasting efficient catalytic activity, the conversion process and the decolorization process are synchronously carried out, efficient decolorization is carried out under the condition of low amino acid loss rate, the cost is reduced, and the process is simplified.

The invention relates to the technical field of fabric recycling and reusing, in particular to a process for degrading colored waste PET fabric and recycling BHET, which comprises the following steps: S1, mixing a composite catalyst, the colored waste PET fabric and ethylene glycol, adding into a reaction kettle, heating to 150-165 DEG C, controlling the pressure in the kettle to 0-0.2 MPa, carrying out degradation reaction for 2-6 hours, and filtering to remove insoluble impurities after the degradation reaction is finished, so as to obtain a mixed solution; an alcoholysis solution is obtained; s2, decolorizing the alcoholysis solution obtained in the step S1 through a multi-stage resin tank to obtain a mixture containing ethylene glycol and a product; and S3, mixing the mixture obtained in the step S2 with deionized water, heating to 95-100 DEG C, cooling to 70-80 DEG C after the mixture is completely dissolved, continuously stirring for 1-3 hours, carrying out hot filtration to obtain filtrate A and a solid A, continuously cooling the filtrate A to-10 to-5 DEG C, stirring for 8-12 hours, filtering to obtain filtrate B and a solid B, and drying the solid B to obtain the BHET. The process disclosed by the invention is relatively good in decolorization efficiency on the colored waste PET and high in BHET yield, and meanwhile, the solvent can be efficiently recycled, so that resource waste is reduced.

The utility model relates to the technical field of chemical production, concretely relates to a cumene hydroperoxide concentration and decoloration system, including primary flash tank, the primary flash tank top has the secondary flash tank through pipeline connection, the primary flash tank bottom has the light heavy component collection jar through pipeline connection, the secondary flash tank top has the light heavy component collection jar through pipeline connection, the secondary flash tank bottom has the tertiary flash tank through pipeline connection, the tertiary flash tank top has the light heavy component collection jar through pipeline connection, the light heavy component collection jar top is connected with vacuum unit, the utility model discloses through multistage flash and vacuum low temperature operation, has realized the efficient decoloration and concentration of CHP, has given consideration to safety, environmental protection and economy, has improved the product quality of downstream ABS resin significantly, has solved the key problem that the product yellowing of chromaticity is out of limit in traditional craft.

A polarizing plate is provided which can maintain excellent optical properties and prevent discoloration even in a high temperature and high humidity environment. The polarizing plate of the present invention is in the form of a sheet, and comprises: a polarizer composed of a polyvinyl alcohol-based resin film containing a dichroic substance, and a protective layer disposed on at least one side of the polarizer, wherein a polyene portion is formed at an end of the polarizer.

The invention relates to the technical field of raw material decoloration, in particular to decoloration equipment capable of dynamically adjusting temperature and application of the decoloration equipment in raw material medicine production. Comprising a base frame; the decolorizing module is fixedly arranged on the base frame in a vertical state; the decolorizing module is provided with a plurality of groups of decolorizing cylinders capable of providing different decolorizing temperatures, and the plurality of groups of decolorizing cylinders are sequentially communicated with one another; a stirring module, wherein the stirring module is rotatably arranged in the decolorizing module; the stirring module is provided with a stirring shaft, a stirring unit coaxially and fixedly arranged outside the stirring shaft, and a sealing unit capable of continuously blocking a conduction channel between two groups of adjacent decolorizing cylinders; the dynamic heating module is coaxially and fixedly arranged outside the decolorizing module; according to the invention, not only can pigments in the liquid medicine be efficiently adsorbed, but also the heating temperature of the liquid medicine can be flexibly regulated and controlled according to decoloration requirements in the decoloration process.

The invention discloses a long-chain alkylbenzene refined decolorization and impurity removal method which comprises the following steps: (1) pumping long-chain alkylbenzene into a stirring tank, adopting low-pressure steam heat tracing, and starting a stirrer to control the stirring process; (2) adding a small amount of acid-activated carclazyte for multiple times while stirring; and (3) after stirring is completed, standing and carrying out third-stage filtration on the supernate. By controlling the stirring rotating speed, the temperature, the carclazyte addition amount and the standing time, the decoloration and impurity removal effects of the long-chain alkylbenzene are optimized. The method is simple and convenient to operate, low in equipment requirement and excellent in impurity removal performance, the prepared long-chain alkylbenzene product has low chromaticity, low bromine index and proper viscosity, and the product index is superior to that of a traditional method.

The utility model relates to lubricating oil filter decoloration technical field, especially lubricating oil filter decoloration device. The lubricating oil filter decoloration device includes: bottom plate, conveying assembly, unloading pump, parking groove, and the top middle part of bottom plate is fixedly connected with first support frame, and the inside top of first support frame is installed with filter, and the top left side of bottom plate is fixedly connected with second support frame, and the inside top of second support frame is fixedly connected with auxiliary agent jar, and the front side of second support frame is fixedly connected with raw material jar at the top left side of bottom plate, and raw material conveying pump is installed on one side of raw material jar, and conveying assembly is installed at the output of raw material conveying pump, and unloading pump is installed on filter, and the top right side of bottom plate is fixedly connected with support platform. The utility model can effectively reduce the colority of lubricating oil, can fully satisfy the strict requirement of high -end field to lubricating oil base oil color, has improved product quality significantly, and then has strengthened the competitiveness of product in high -end market, improved economic benefits.