Process for the production of a compound comprising potassium phosphite comprising the steps of (a) reacting carboxylic acid of the formula R-(C(=O)OH)n with phosphorous trichloride (PCl3) towards a mixture comprising phosphorous acid (H3PO3) and acid chloride of the formula R-(C(=O)Cl)n; wherein R is a linear or branched alkyl or alkanediyl group with 1-20 carbon atoms and n is 1 or 2, (b) subjecting said mixture to a separation step, thereby obtaining (i) a fraction comprising crude phosphorous acid (H3PO3) and (ii) a fraction comprising acid chloride, (c) combining water, a potassium compound selected from KOH, KHCO3 and K2CO3, and the fraction comprising crude phosphorous acid, thereby forming an aqueous solution comprising potassium phosphite, and (d) removing organic compounds from said aqueous solution.
生产含
磷酸钾的化合物的工艺包括以下步骤:(a)将具有
化学式R-(C(=O)OH)n的
羧酸与
三氯化磷(PCl3)反应,生成包含
磷酸(H3PO3)和具有
化学式R-(C(=O)Cl)n的酸
氯化物的混合物;其中R是具有1-20个碳原子的直链或支链烷基或烷二基基团,n为1或2,(b)将所述混合物进行分离步骤,从而获得(i)包含粗
磷酸(H3PO3)的部分和(ii)包含酸
氯化物的部分,(c)结合
水、从KOH、KHCO3和K2CO3中选择的
钾化合物以及包含粗
磷酸的部分,从而形成含有
磷酸钾的
水溶液,以及(d)从所述
水溶液中去除有机化合物。