2280-49-1Relevant academic research and scientific papers
Environment-friendly synthesis method of scorch retarder N-phenyl-N-trichloromethylthio benzene sulfonamide
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Paragraph 0031-0043, (2020/08/27)
The invention discloses an environment-friendly synthesis method of a scorch retarder N-phenyl-N-trichloromethylthio benzene sulfonamide. The synthesis method comprises the following steps: controlling the temperature, dropwise adding benzene sulfonyl chloride into a mixed solution of aniline, alkali, TBAB and water, heating in stages to prepare an intermediate; after the reaction, extracting theintermediate by using an organic solvent, mixing the organic mother liquor containing the intermediate with alkali, TBAB and water, controlling the temperature, dropwise adding perchloromethyl mercaptan into the mixed solution, and heating in stages to obtain the final product. A sectional heating mode is adopted in the synthesis process of the intermediate and the product; meanwhile, alkali and aphase transfer catalyst are combined; the reaction conversion rate is increased, side reactions are reduced, the obtained product is pure white in appearance, high in purity and stable in quality, the domestic technical blank is filled up, the COD and total nitrogen content of the wastewater are sharply reduced, the strong pungent smell of perchloromethyl mercaptan in the wastewater is greatly reduced, the wastewater treatment difficulty is reduced, and the effect of clean production is achieved.
Pesticidal compositions containing phosphoric esters and divalent sulphur compounds
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, (2008/06/13)
Pesticidal composition comprising: a pesticidal, phosphoric ester the molecule of which has at least one alkyl group of 1 to 3 carbon atoms, 0.05 to 10% of an agent stabilizing the said ester against decomposition by protonisation, together with adjuvants characterized in that the stabilizing agent comprises at least one sulphur compound containing per molecule at least one divalent sulphur atom of which one valence is bonded to an atom chosen from sulphur, carbon, nitrogen, hydrogen, and metals capable of giving a salt, the other valence being bonded to an atom chosen from hydrogen, the carbon atom already noted, a second carbon atom, the nitrogen atom already noted, a second nitrogen atom, the metal atom already noted in the case of a metal of valence greater than one, a second atom of metal and oxygen when the first valence is not attached to an atom of hydrogen, the proportion of sulphur calculated with reference to the weight of the sulphur compound being between 5 and 99%. Process for stabilizing a phosphoric ester of which the molecule possesses at least one alkyl group containing 1 to 3 carbon atoms characterized in that there is added to the phosphoric ester or to a mixture which contains it, 0.05 to 10% calculated on the weight of the phosphoric acid ester of an agent capable of stabilizing the said phosphoric ester against protonisation and comprising at least one sulphur compound such as that defined thereupon.
