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Recovery of hydrochloric acid from Arginine production process solution by diffusion dialysis

Authors： Li Chuanrun1,2*, Wang Huchuan1, Zhang Xu2, Tao Zhen1, Hua Wei1, Yang Weihua2, Xu Tongwen2*

Units： 1. College of Pharmacy, Anhui College of TCM, Hefei 230031;

KeyWords： Acid recovery; diffusion dialysis; membrane; Arginine

ClassificationCode：TQ09

year,volume(issue):pagination： 2012,32(4):102-106

Abstract：

Diffusion dialysis with DF-120 anion exchange membrane was adopted to achieve the objective of waste hydrochloric acid recycling and reusing during the Arginine (Arg) production process. The experiment was performed in a series of static and dynamic tests with a mixed Arginine and HCl industrial simulated waste acid. The diffusion dialysis coefficient of HCl across the chosen DF-120 anion exchange was measured in the static test, while some operation parameters such as flow rate and flow rate ratio on the performance of the diffusion dialysis process were investigated in the dynamic test. Results from the static experiment indicated that HCl could transport across the membrane while Arg was completely rejected and it could not be detected in the diffusate solution. Dynamic experimental results showed that the performance of the diffusion dialysis process was declined with an increase of flow rate, while the performance was enhanced with an increase of flow rate ratio. A high Arg rejection ratio of about 98.5% could be obtained and there was no obviously change of this ratio during the recovery process. The concentration of HCl in the diffusate and dialysate were decreased with an increase of water flow rate. A maximum HCl recovery ratio of about 82% could be achieved at a flow rate of 2 mL/min. A preliminary economic evaluation indicated that a 30 t/a Arg produced company could save ¥98000 per year compared with the conventional neutralization method for spent hydrochloric acid. The diffusion dialysis system also revealed that the investment-recovered period was short as about 8 months.

Funds：

安徽省高等学校省级自然科学研究重大项目（ZD200901），安徽省教育厅重点基金（Nos. KJ2008A072,KJ2009A003）.

AuthorIntro：

*通讯联系人

Reference：

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