溶剂萃取法净化萃余酸制磷酸二氢钾

Abstract

Abstract: A new method for preparation of potassium dihydrogen phosphate from potassium chloride and the raffinate from phosphoric acid purification by extraction method with butyl alcohol as extractant was studied.The influences of the butyl alcohol′s water content，extraction time，extraction temperature，and amounts of the raffinate on product quality were investigated and the optimum conditions were confirmed as follows：127.4 g raffinate was contained per 1 L butyl alcohol，95 g water was contained per 1 L butyl alcohol，the extraction time was 60 min，the extraction temperature was 30 ℃，and 26.075 g potassium chloride was used per 1 L butyl alcohol.The advantages of the method were economical and simple in operation.

Key words: potassium dihydrogen phosphate, butyl alcohol, extraction method, raffinate

CLC Number:

TQ131.13

YOU Cai-Xia, YANG Zheng-Fa, WANG Gui-Zhen, ZHOU Jun-Hong, SUN Na. Preparation of potassium dihydrogen phosphate with raffinate from phosphoric acid purification by extraction method[J]. INORGANICCHEMICALSINDUSTRY, 2014, 46(1): 56-.

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Inorganic Acid-Base-Salt Committee of CIESC

Preparation of potassium dihydrogen phosphate with raffinate from phosphoric acid purification by extraction method

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