活性生物猪骨炭纯化盐湖工业氯化钾

doi:10.11962/1006-4990.2019-0494

Abstract

Abstract:

Food grade and medicinal potassium chloride are mainly prepared by further purification of industrial grade potassium chloride products.The industrial potassium chloride from salt lake is prepared by flotation agent,so there are some problems of residual flotation agent and some heavy metals exceeding the standard.By determination of industrial potassium chloride samples from salt lake,the mass fractions of ammonium and lead are 1.698×10^-4 and 1.63×10^-5.In order to prepare food grade potassium chloride,the activated biochar with the specific surface area of 147.26 m²/g and the iodine adsorption value of 297.5 mg/g was prepared by using pig bone as raw material and phosphoric acid as activator.Then,1 L potassium chloride solution was adsorbed by 10 g activated pig bone biochar and commercial carbon,respectively.Results showed that after the adsorption of activated pig bone biochar,the contents of all ions in the solution met the requirement of Food Additive Potassium Chloride,GB 25585—2010,and food grade potassium chloride was prepared successfully.

Key words: potassium chloride, activated biochar, adsorption, salt lake, pig bone

CLC Number:

TQ131.13

Li Haichao,Ji Qingsong,Zhang Jingjing,Yang Siqiao. Purification of industrial potassium chloride from salt lake by activated pig bone biochar[J]. Inorganic Chemicals Industry, 2020, 52(8): 76-77.

Figures/Tables 3

References 9

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项目	w（氯化钾）/%	w（钙）/ 10^-6	w（镁）/ 10^-6	w（十八胺）/10^-6	w（铅）/ 10^-6	w（砷）/ 10^-6
工业氯化钾样品	95.78	46.3	30.1	168.9	16.3	未检出
预处理	未测定	未检出	未检出	未测定	未测定	未检出
1 g/L活性猪骨炭	99.17	未检出	未检出	88.7	11.6	未检出
3 g/L活性猪骨炭	未测定	未检出	未检出	25.2	4.9	未检出
5 g/L活性猪骨炭	未测定	未检出	未检出	未检出	未检出	未检出
10 g/L活性猪骨炭	99.31	未检出	未检出	未检出	未检出	未检出
15 g/L活性猪骨炭	99.26	未检出	未检出	未检出	未检出	未检出
10 g/L活性炭对照	99.45	未检出	未检出	未检出	13.0	未检出

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Purification of industrial potassium chloride from salt lake by activated pig bone biochar

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