首页>
外国专利>
Process for removing metal-EDTA complex and free EDTA salts from mixed aqueous-organic media
Process for removing metal-EDTA complex and free EDTA salts from mixed aqueous-organic media
展开▼
机译:从混合的水-有机介质中去除金属-EDTA络合物和游离EDTA盐的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Ethylenediaminetetraacetic acid (EDTA)-complexed heavy metals alone or together with free EDTA salts are removed from solution in a mixture comprising a solvent for a polyphenylene ether resin, an antisolvent for a polyphenylene ether resin and water, by contacting the mixture with alumina for a time at least sufficient to selectively adsorb the metal- EDTA complex and free EDTA salts and recover the mixture of solvent, antisolvent and water substantially free of the metal-EDTA complex and EDTA salts. The alumina can be regenerated to nearly its full original adsorption capacity by contacting with water at a neutral or nearly neutral pH, to give an aqueous solution of the metal-EDTA complex and free EDTA salts.
展开▼