[EN] PROCESS FOR THE PRODUCTION OF A FERTILIZER<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN ENGRAIS
申请人:AKZO NOBEL CHEMICALS INT BV
公开号:WO2019145304A1
公开(公告)日:2019-08-01
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。