5results about How to "Improve decolorization efficiency" patented technology

The utility model relates to a pyrrole quinolinone production technical field especially relates to a kind of recovery treatment system for pyrrole quinolinone salting-out mother liquor and crystallization mother liquor, including pyrrole quinolinone salting-out mother liquor conveying pipeline and pyrrole quinolinone crystallization mother liquor conveying pipeline, pyrrole quinolinone salting-out mother liquor conveying pipeline, first concentration kettle, first crystallization, first drying device, sodium chloride storage tank and series connection;Pyrrole quinolinone crystallization mother liquor conveying pipeline, second concentration kettle, dilution kettle, decoloring kettle, first resin column, first pH adjusting kettle, second resin column, second pH adjusting kettle, second crystallization kettle, second drying device, pyrrole quinolinone storage tank are connected in series in proper order.The above-mentioned recovery treatment system design is reasonable, can recycle and utilize sodium chloride in salting-out mother liquor and pyrrole quinolinone in crystallization mother liquor, avoids resource waste.

The invention provides a carbonized resin decolorizing and refining method for mixed dibasic acid dimethyl ester, and belongs to the technical field of chemical separation and purification. According to the technical scheme, spherical carbonized resin formed by carbonizing styrene-divinyl benzene polymer resin is used as an adsorbent, and a colored crude product DBE is subjected to decoloration treatment through a fixed bed process. The carbonized resin has extremely high selective adsorption capacity and adsorption rate on colored impurities in DBE, the Pt-Co color number of the carbonized resin can be reduced from 50 or above to 10 or below, the decolorization rate exceeds 80%, and meanwhile the yield of the DBE product reaches 99% or above. And the resin saturated by adsorption is easy to regenerate and can be repeatedly used. The method is simple in process, efficient and environment-friendly, overcomes many defects of a traditional activated carbon decoloration method, and is particularly suitable for industrial refining production of DBE.

The utility model relates to the technical field of inositol production, in particular to a production system for preparing magnesium dihydrogen phosphate by utilizing inositol hydrolysis residues, which comprises a hydrolysis residue storage tank, a discharge port of the hydrolysis residue storage tank is communicated with a smashing device, a discharge port of the smashing device is communicated with a reaction kettle, and a discharge port of the reaction kettle is communicated with a filtering device. A liquid outlet of the filtering device is communicated with a first buffer kettle, a discharge port of the first buffer kettle is communicated with a decolorizing kettle, a decolorizing liquid outlet of the decolorizing kettle is communicated with a second buffer kettle, a discharge port of the second buffer kettle is communicated with a crystallization kettle, a crystal outlet of the crystallization kettle is communicated with a drying device, and a discharge port of the drying device is communicated with a product storage tank. According to the production system with the structure, continuous operation can be realized, phosphate in the inositol hydrolysis residues can be recycled, resource waste is avoided, and a high-yield, high-yield and high-purity monopotassium phosphate product can be obtained.

The invention discloses an efficient and stable decolorization process of a monosodium glutamate neutralization solution, and relates to the technical field of food processing. The process comprises the following steps: firstly, precisely adjusting a monosodium glutamate neutralization solution to 60-70 DEG C, then adding coconut shell activated carbon with a specific particle size according to 0.6-0.8% of the mass of the neutralization solution, stirring for 45-55 minutes at a constant temperature at 120-150r / min, and finally, realizing solid-liquid separation through precise filtration. Through the synergistic effect of closed-loop temperature control, precise feeding and optimized stirring, the high stability and high efficiency of the decolorizing process are ensured, the light transmittance of the neutralized liquid after decolorizing is stabilized at 86.5-87%, the chromaticity is smaller than or equal to 5, and the repeatability between batches is remarkably improved. In addition, the process can also comprise activated carbon regeneration and self-adaptive parameter adjustment functions based on online water quality analysis, the operation cost is greatly reduced while the decolorization effect is ensured, the adaptability to raw material fluctuation is enhanced, and the process is particularly suitable for industrial continuous production of high-quality monosodium glutamate.

The invention relates to a method for decolorizing waste cotton-polyester blended fabric through low-temperature plasma synergistic chemical oxidation. Through the synergistic effect of low-temperature plasma and an acidic chemical oxidant (composed of inorganic acid, hydrogen peroxide, a penetrant and a hydrogen peroxide stabilizer), color development and auxochrome groups of dye on the waste polyester-cotton blended fabric are effectively destroyed, and efficient decolorization of the waste polyester-cotton blended fabric is achieved. According to the technical scheme, the decolorizing efficiency is improved, the original performance of polyester and cotton fibers can be reserved, the secondary utilization performance of the recycled waste polyester-cotton mixed textile fabric is guaranteed, and an effective means is provided for resource utilization of the waste polyester-cotton mixed textile fabric. Compared with a traditional chemical oxidation technology, the method has the advantages that the required acid amount and treatment time are remarkably reduced, the temperature required by the reaction is greatly reduced, the environmental protection performance is remarkably improved, the energy consumption is reduced, and an economic and green new way is provided for recycling the waste polyester-cotton mixed textiles.