Saponification process for producing vinylidene chloride
A saponification technology of vinylidene chloride, which is applied in the saponification process field of vinylidene chloride production, can solve the problems of high caustic soda concentration, multiple by-products, and incomplete saponification reaction, so as to reduce side reactions, increase yield, and reduce environmental pollution. pollution effect
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Embodiment 1
[0011] A saponification process for producing vinylidene chloride comprises the following steps:
[0012] 1. Add 10% caustic soda into the high-level tank to raise the temperature to 75°C, and automatically control the liquid level to be constant;
[0013] 2. Make the main reaction kettle into a mother liquor containing 1% alkali. Generally, the amount of the mother liquor is determined according to the height of the overflow pipe. When the temperature is raised to 75°C, the side reaction kettle is made into a mother liquor containing 1% alkali. The liquid level is controlled as 80cm, heat up to 70°C, then add alkali and chlorinated solution dropwise at the same time, control the flow rate of alkali to 2200L / h, and the flow rate of chlorinated solution to 1000L / h, and circulate the reaction through the saponification pump of the main reactor;
[0014] 3. The increased material in the upper reactor overflows into the side reaction through the overflow pipe, and circulates the r...
Embodiment 2
[0016] A saponification process for producing vinylidene chloride comprises the following steps:
[0017] 1. Add 13% caustic soda into the high-level tank to raise the temperature to 77°C, and automatically control the liquid level to be constant;
[0018] 2. Make the main reaction kettle into a mother liquor containing 5% alkali. Generally, the amount of mother liquor is determined according to the height of the overflow pipe. When the temperature is raised to 77°C, the side reaction kettle is made into a mother liquor containing 3% alkali. The liquid level is controlled as 100cm, heat up to 90°C, then add alkali and chlorinated solution dropwise at the same time, control the flow rate of alkali to 2600L / h, and the flow rate of chlorinated solution to 1100L / h, and circulate the reaction through the saponification pump of the main reactor;
[0019] 3. The increased material in the main reactor overflows into the side reaction through the overflow pipe, and circulates the react...
Embodiment 3
[0021] A saponification process for producing vinylidene chloride comprises the following steps:
[0022] 1. Add 15% caustic soda into the high-level tank to raise the temperature to 80°C, and automatically control the liquid level to be constant;
[0023] 2. Make the main reaction kettle into a mother liquor containing 3% alkali. Generally, the amount of the mother liquor is determined according to the height of the overflow pipe. When the temperature is raised to 80°C, the side reaction kettle is made into a mother liquor containing 2% alkali. The liquid level is controlled as 90cm, heat up to 80°C, then add alkali and chlorinated solution dropwise at the same time, control the flow rate of alkali to 2400L / h, and the flow rate of chlorinated solution to 1200L / h, and circulate the reaction through the saponification pump of the main reactor;
[0024] 3. The increased material in the main reactor overflows into the side reaction through the overflow pipe, and circulates the re...
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