| Citric acid is produced by fermentation of the most important organic acids, widely used in food, pharmaceutical and chemical fields. The current most domestic manufacturers product citric acid production using calcium citrate, the technology has the following main shortcomings : (1) Processes more, workers labor-intensive; (2) Low production yield, currently only about 85%; (3) Generate large amounts of calcium sulfate waste to result in the environmental pollution.In this paper, a detailed study is carried through of the new process, by which citric acid is extracted through continuous ion exchange using chromatography.Small test results show that: Producing citric acid and sodium by the citrate citric acid chromatography technology is feasible and resin can better adsorption membrane filtrate citric acid, sugar row at the same time the sugar of the absorbed citric acid can be eluate eluting down using Pai sugar agent to ensure that the vulnerable carbon qualified.The pilot test and industrial production both are carried through on the basis of the laboratory small experiments The results shows the chromatogram separation technology of extracting citrate acid new process is flexible. This technology has several advantages compared to the traditional methods with simple process, high degree of automation, low cost, and small pollution. The output is in line with several international standards including GB98, U.S. pharmacopoeia USP24, British pharmacopoeia BP 98 and U.S. food additive standards FCC-Iv, and citrate acid (sodium citrate)production yield above 95%. Meanwhile sodium citrate yield increase by about 7%. The procedure will not produce carbon dioxide and calcium sulphate, so it can solve the problem of greenhouse gasses . And it can decrease the cost of waste disposal due to the less calcium sulphate.
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