Process for synthesizing O,O'-alkyl thiophosphoric acid
A technology of an alkyl thiophosphoric acid and a synthesis method, applied in the field of O, can solve the problems of low yield, many by-products, accelerated side reactions, etc., and achieves high reaction yield, reduced possibility of accidents, and suppressed side reactions. Effect
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Embodiment 1
[0008] Example 1, the preparation of O, O'-dimethylthiophosphoric acid: add 13 grams of methanol, 350 milliliters of benzene, and 5 grams of triethylamine in the reaction kettle, and control the temperature between 10 and 15°C under stirring. During this period, about 222 grams of phosphorus pentasulfide was put into it, and then 121 grams of methanol was added dropwise within 30 to 60 minutes while maintaining the temperature between 10 and 15°C, and continued to insulate and stir for 0 to 2 hours to obtain O, O'-dimethylphosphoric acid thioxate. The rate is about 98%.
Embodiment 2
[0009] Example 2 is the same as Example 1, and the temperature is controlled between 20-25°C to obtain O, O'-dimethylthiophosphoric acid with a yield of about 98%.
Embodiment 3
[0010] Example 3 is the same as Example 1, and the temperature is controlled between 35-40°C to obtain O, O'-dimethylphosphoric acid thio, with a yield of about 98%.
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