- Preparation method of zinc benzenesulfinate compound
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The invention relates to a preparation method of a zinc benzenesulfinate compound, namely, the zinc benzenesulfinate compound is prepared by mixing and reacting a benzenesulfonyl chloride compound, sodium sulfite, inorganic alkali and zinc salt in water through a one-step method. The method is simple in process, convenient to operate, high in product yield and good in quality; the method can be carried out on conventional equipment, and is a process route suitable for industrial production.
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Paragraph 0026-0033; 0050-0051; 0058-0059
(2021/04/03)
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- Preparation method of alkyl zinc sulfinate series compound
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The invention relates to a preparation method of an alkyl zinc sulfinate series compound. Alkyl sulfonyl chloride is added into a mixed system of sodium sulfite, zinc oxide and water, an alkyl zinc sulfinate series product is obtained by a one-pot method, and salt-containing mother liquor provides a zinc source for zinc dialkyl dithiocarbamate. The method can be carried out on conventional equipment, no organic solvent is used, the operation is simple and convenient, and the safety is high; hydrolysis of alkyl sulfonyl chloride is effectively controlled, and the product yield is remarkably increased; and recycling of by-products is achieved.
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Paragraph 0023-0024; 0026-0027
(2020/05/14)
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- Synthetic method of zinc benzenesulfinate
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The invention discloses a synthetic method of zinc benzenesulfinate. The method comprises the following steps: S1, reducing benzenesulfonyl chloride into benzenesulfinate in the presence of an inorganic base by using the benzenesulfonyl chloride as a starting raw material, sodium sulfite as a reducing agent and water as a solvent to obtain a benzenesulfinate aqueous solution; and S2, adding a zincchloride aqueous solution into the benzenesulfinate aqueous solution obtained in the S1, carrying out a reaction, and stopping the reaction; and carrying out cooling, carrying out filtering, carryingout washing by using water and carrying out drying to obtain the target product zinc benzenesulfinate, wherein the reaction temperature in the S2 is 50-90 DEG C, and the reaction time is 60-120 min;and preferably, the reaction temperature in the S2 is 72-75 DEG C, and the reaction time is 80-100 min. The synthetic method provided by the invention has the advantages of simple process steps, no use of organic solvents, no pollution, safety, environmental protection, a high yield, simple operation, raw materials convenient and easy to obtain, and low price; and the method is a synthetic route suitable for large-scale industrial production.
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Paragraph 0038-0090
(2020/01/12)
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