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Information on Environmental Prevention and Control of Hazardous Waste Pollution in 2023
Jiangxi Jiyu New Materials Co., Ltd. Information on Environmental Pollution Prevention and Control of Hazardous Waste in 2023
2023/09/11
Propionic acid, butyric acid secondary mother liquor turn waste into treasure
Application for invention patent certificate in 2022.
2023/03/14
Information on Environmental Prevention and Control of Hazardous Waste Pollution in 2022
Hazardous waste pollution prevention and control information
2022/09/01
Dimethylol propionic acid (DMPA)19 heavy metal test reports
Dimethylol propionic acid (DMPA)19 heavy metal test reports
2022/04/15
Method steps for preparing 2,2-dihydroxypropionic acid
Method steps for preparing 2,2-dihydroxypropionic acid
2020/09/19
Preparation method of 2,2-dimethylol propionic acid
The invention adopts activated carbon loaded sodium hydroxide condensation catalyst instead of inorganic alkali, which can stabilize pH value, improve reaction rate and condensation yield. Adding water to remove formic acid reduces the influence on product yield, facilitates dehydration and reduces mucilage, makes crude products easier to crystallize, has pure crystals, large particles, is easier to centrifuge and has high filtration efficiency. Refining with water as diluent instead of chemical solvent saves cost, is safe and has no pollution to the environment, no organic solvent is used in the crystallization process, with low energy consumption and good working environment in the crystallization and centrifugation processes. Adding iron remover and activated carbon is beneficial to improve product quality. The crude mother liquor is re-concentrated and then recrystallized to extract the product again. The fine mother liquor is then concentrated, decolorized, crystallized, centrifuged and dried to recover 2,2-dimethylol propionic acid again, thus improving the product yield; the refined mother liquor is recycled and returned to the crude mother liquor, with less wastewater discharge, which is conducive to clean production.
2020/09/19
Common Status and Dilemma of 2,2-Dimethylolpropionic Acid
2,2-dimethylol propionic acid can be widely used in the production of water-soluble polyurethane, polyester, epoxy resin, etc. It is a green environmental protection chemical. Dimethylol propionic acid through the action of two primary hydroxyl groups, without the need to protect the third carboxyl group can be easily methyl esterification or esterification of carbamate, and then in ammonia to neutralize the unreacted carboxyl group, so that it is water soluble. In terms of solubility, dimethylolpropionic acid has its own unique advantages, and its excellent solubility can greatly improve work efficiency.
2020/09/19
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