Method for preparing dicarboxylic acid zinc
A technology of zinc dicarboxylic acid and dicarboxylic acid, applied in the preparation of carboxylate, organic chemistry and other directions, can solve problems such as environmental pollution, and achieve the effects of reducing pollution, simple preparation method and good catalytic activity
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[0017] The present invention provides a method for preparing zinc dicarboxylate, which includes the following steps:
[0018] The sodium dicarboxylate aqueous solution and the zinc chloride aqueous solution are reacted to obtain zinc dicarboxylate.
[0019] In the present invention, the preparation method of the sodium dicarboxylic acid aqueous solution preferably includes the following steps:
[0020] The dicarboxylic acid and the sodium hydroxide aqueous solution are reacted to obtain the sodium dicarboxylic acid aqueous solution.
[0021] In the present invention, the dicarboxylic acid preferably includes one or more of glutaric acid, adipic acid, succinic acid and sebacic acid.
[0022] In the present invention, the mass fraction of the sodium hydroxide aqueous solution is preferably 10% to 40%, more preferably 15% to 38%, and most preferably 25% to 35%.
[0023] In the present invention, the molar ratio of the dicarboxylic acid and the sodium hydroxide in the sodium hydroxide aqueou...
Example Embodiment
[0042] Example 1
[0043] Add 38.1g of 21% sodium hydroxide aqueous solution under magnetic stirring, add 13.2g glutaric acid, react for 20min, add 34g of 40% zinc chloride aqueous solution at 25℃ for 20min, react for 1h, filter After washing and drying, 18.2 g of white powder zinc glutarate was obtained, with a yield of 93.3%.
[0044] Carbon dioxide and propylene oxide were polymerized in the presence of the zinc dicarboxylate prepared above to obtain 38.2 g of polycarbonate; the polymerization conditions were: 1 g of zinc glutarate, 100 mL of propylene oxide, and carbon dioxide pressure 3.5MPa, reaction time 8h, reaction temperature 70℃.
Example Embodiment
[0045] Example 2
[0046] Add 10.1g of 40% sodium hydroxide aqueous solution under magnetic stirring, add 7.3g adipic acid, react for 30min, add 14.3g of 48% zinc chloride aqueous solution at 30℃ for 10min, react for 20min, After filtration, washing and drying, 9.8 g of white powder zinc adipate was obtained, with a yield of 93.8%.
[0047] Carbon dioxide and propylene oxide were polymerized in the presence of zinc adipate prepared above to obtain 23.7 g of polycarbonate; the polymerization conditions were: 1 g of zinc adipate, 100 mL of propylene oxide, and 3.5 carbon dioxide pressure. MPa, reaction time 8h, reaction temperature 70°C.
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