Preparation method of calcium fumarate
A technology of calcium fumarate and fumaric acid, which is applied in the preparation of carboxylate, carboxylate, and organic compounds, can solve problems such as complex processes, and achieve cheap and easy-to-obtain raw materials, simple and convenient operations, and fast The effect of efficient preparation
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[0014] The embodiment of the present invention provides a kind of preparation method of calcium fumarate, it comprises:
[0015] S1. Fumaric acid and sodium carbonate are mixed and dissolved to obtain a mixed solution;
[0016] S2. mixing the mixed solution with the calcium chloride solution at high temperature to obtain a reaction solution;
[0017] S3. Filter the reaction solution, collect the filter residue and dry it.
[0018] In this method, by mixing fumaric acid and sodium carbonate to generate a soluble intermediate product, and then reacting with calcium chloride, the product and reaction efficiency of calcium fumarate can be effectively improved.
[0019] Further, the mass ratio of fumaric acid to sodium carbonate is 1:0.94~0.98. The concentration of fumaric acid is 0.25~0.35g / mL. Within the above ratio range, the reaction efficiency of fumaric acid and sodium carbonate is better, and the desired intermediate product can be obtained quickly and efficiently. Alter...
Embodiment 1
[0025] The present embodiment provides a kind of preparation method of calcium fumarate, it comprises:
[0026] S1. Measure 500 ml of distilled water into a beaker, add 155 g of fumaric acid, stir to dissolve, then add 147 g of sodium carbonate, stir until clear and transparent, filter for about 1 h, and obtain a mixed solution;
[0027] S2. measure the distilled water of 300 ml and pour into the beaker, add the calcium chloride of 200 g, stir and dissolve, obtain calcium chloride solution;
[0028] S3. Mix the calcium chloride solution with the mixed solution, and react at 80° C. for 2 h to obtain a reaction solution;
[0029] S4. Filter the reaction solution, collect the filter residue, and dry at 120°C for 2 h to obtain the calcium fumarate product (white solid, yield 86.4%, calcium content 26.8%).
Embodiment 2
[0031] The present embodiment provides a kind of preparation method of calcium fumarate, it comprises:
[0032] S1. Measure 300 ml of distilled water into a beaker, add 100 g of fumaric acid, stir to dissolve, then add 98 g of sodium carbonate, stir until clear and transparent, filter for about 1 h, and obtain a mixed solution;
[0033] S2. measure the distilled water of 300 ml and pour into the beaker, add the calcium chloride of 133 g, stir and dissolve, obtain calcium chloride solution;
[0034] S3. Mix the calcium chloride solution with the mixed solution, and react at 85° C. for 3 h to obtain a reaction solution;
[0035] S4. Filter the reaction solution, collect the filter residue, and dry at 150°C for 0.5 h to obtain the calcium fumarate product (white solid, yield 81.7%, calcium content 23.5%).
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