Calcium fumarate phosphate, preparation method thereof and application of phosphate
A technology of calcium fumarate phosphate and fumaric acid, which is applied in the preparation of carboxylate, the preparation and application of carboxylate, etc., can solve the problems of corrosive equipment and pipelines, ammonium chloride is easy to absorb moisture and agglomerate, and it is easy to volatilize. Operating environment and other problems, to achieve the effect of convenient operation, moderate price, and improved product purity
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Embodiment 1
[0060] A kind of calcium fumarate phosphate of the present invention, molecular formula can be expressed as Ca 2 (C 4 h 3 o 4 )PO 4 , the structural formula is Ca(C 4 h 3 o 4 ) 2 · Ca 3 (PO 4 ) 2 , its preparation method comprises the following steps:
[0061] at 5m 3 Add 2t of water into the reaction kettle, add 232kg of fumaric acid into the water, heat up to 60°C, add 310.2kg of tricalcium phosphate to react, stir and react for 3.5h, and use calcium oxide to control the pH value to 6.5 throughout the process, so that it can fully react completely Afterwards, cooling and crystallization, followed by solid-liquid separation, washing, drying and pulverizing the precipitated crystals after solid-liquid separation to obtain about 551 kg of calcium fumarate phosphate product.
[0062]During cooling and crystallization, the operation steps for judging the completion of crystallization include: take a small amount of reaction system solution, filter to remove the crysta...
Embodiment 2
[0065] A kind of calcium fumarate phosphate of the present invention, molecular formula can be expressed as Ca 2 (C 4 h 3 o 4 )PO 4 , the structural formula is Ca(C 4 h 3 o 4 ) 2 · Ca 3 (PO 4 ) 2 , its preparation method comprises the following steps:
[0066] at 2m 3 Add 0.93t of water into the reaction kettle, add 116kg of fumaric acid into the water, heat up to 30°C, add 136kg of calcium hydrogen phosphate to react, stir for 2.0h, and use calcium hydroxide to control the pH value to 5.0 throughout the process to make it fully react After completion, cool and crystallize, and then carry out solid-liquid separation, wash, dry, and pulverize the precipitated crystals after solid-liquid separation to obtain about 263.9 kg of calcium fumarate phosphate product.
[0067] During cooling and crystallization, the operation steps for judging the completion of crystallization include: take a small amount of reaction system solution, filter to remove the crystallization pro...
Embodiment 3
[0071] A kind of calcium fumarate phosphate of the present invention, molecular formula can be expressed as Ca 2 (C 4 h 3 o 4 )PO 4 , the structural formula is Ca(C 4 h 3 o 4 ) 2 · Ca 3 (PO 4 ) 2 , its preparation method comprises the following steps:
[0072] at 2m 3 Add 1.16t of water into the reaction kettle, add 232kg of fumaric acid into the water, heat up to 70°C, add 234kg of calcium dihydrogen phosphate to react, stir for 1.0h, and use calcium oxide to control the pH value to 6.0 throughout the process to make it fully react After completion, cool and crystallize, and then carry out solid-liquid separation, wash, dry, and pulverize the precipitated crystals after solid-liquid separation to obtain about 562.6 kg of calcium fumarate phosphate product.
[0073] During cooling and crystallization, the operation steps for judging the completion of crystallization include: take a small amount of reaction system solution, filter to remove the crystallization produ...
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