Technical Information
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
Annual staff physical examination activities
Jiangxi Jiyu New Materials now organizes an annual physical examination for all employees of our company. The human body is a high-speed running machine, and the various organs of the body are like machine parts, running 24 hours a day, the hidden dangers will gradually increase, if not checked all the year round, there will be serious failures. Disease is not found in the early signs of disease, early prevention and treatment, early elimination of hidden dangers, to maximize the state of health. Much
2020/07/10
How do you do epidemic prevention back to work? The office epidemic prevention guide is here!
How do you do epidemic prevention back to work? The office epidemic prevention guide is here!
2020/04/29
Water-based coatings to replace the traditional solvent-based coatings has become a major trend in the development of coatings, with the gradual improvement of environmental standards, the amount of water-based coatings is growing at a faster rate, water-based polyurethane production of DMBA demand is also growing.
2020/03/13
China's water-based resin is bound to develop rapidly, water-based materials to replace the traditional oil-based materials is the trend of the times, dimethylol butyric acid as a better performance of carboxylic acid type hydrophilic chain extender, known as the 21st century environment-friendly fine chemical intermediates, will usher in a broad market,
2019/11/25
The pipeline production of 2,2-dimethylol propionic acid (DMPA) of Jiangxi Jiyu New Materials Co., Ltd. was officially put into operation on October 9, 2019
2019/11/11
2,2-dimethylol butyric acid is a kind of both hydroxyl and carboxyl groups, it can also be used in leather materials, liquid crystal, ink, food additives and adhesive chemical industry, etc., especially in the manufacture of water emulsion polyurethane and leather finishing agent, it is not only a chain extender, but also can make polyurethane obtain good self emulsification performance, can greatly improve the stability of polyurethane water emulsion.
2019/11/11
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