Production method of high-grade sodium thioglycollate powder
A technology of sodium thioglycolate and its production method, which is applied in the field of production of high-grade sodium thioglycolate powder, can solve the problems of low product grade, high packaging costs, and high freight costs, and achieve the goals of reducing packaging costs, long shelf life, and reducing transportation costs Effect
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Embodiment 1
[0024] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:
[0025] Step 1, salt formation: mix chloroacetic acid and deionized water uniformly at a mass ratio of 1:1.8 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix uniformly to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 55% of described chloroacetic acid quality;
[0026] Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then heat up to 80°C at a heating rate of 0.5°C / min to obtain a condensate; the sodium thiosulfate The addition is 2.8 times of the quality of the chloroacetic acid;
[0027] Step 3, sulfhydration: Add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 20°C at a cooling rate of 3°C / min to obtain a sulfhydration product; the amount of sodi...
Embodiment 2
[0031] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:
[0032] Step 1, salt formation: mix chloroacetic acid and deionized water uniformly in a mass ratio of 1:1.6 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix uniformly to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 50% of described chloroacetic acid quality;
[0033] Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then raise the temperature to 60°C at a heating rate of 0.6°C / min to obtain a condensate; the sodium thiosulfate The addition is 3.0 times of the quality of the chloroacetic acid;
[0034] Step 3, sulfhydration: Add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 20°C at a cooling rate of 2.5°C / min to obtain a sulfhydration product; th...
Embodiment 3
[0038] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:
[0039] Step 1, salt formation: mix chloroacetic acid and deionized water in a mass ratio of 1:2.0 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix well to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 60% of described chloroacetic acid quality;
[0040]Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then raise the temperature to 90°C at a heating rate of 1.0°C / min to obtain a condensate; the sodium thiosulfate The addition is 2.6 times of the quality of the chloroacetic acid;
[0041] Step 3, sulfhydration: add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 5°C at a cooling rate of 5°C / min to obtain a sulfhydration product; the amount of sodium ...
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