Desalting method of amino acid chelating agent
An amino acid, chelating agent technology, applied in chemical instruments and methods, preparation of organic compounds, semi-permeable membrane separation, etc., can solve problems such as increasing synthesis and post-processing costs, losing products, and reducing yields
Pending Publication Date: 2021-06-04
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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Abstract
A desalting method of an amino acid chelating agent comprises the following steps: step 1, diluting a reacted amino acid chelating agent mother solution with pure water into an aqueous solution with the chelating agent content of 20-30%; 2, transferring the aqueous solution obtained in the step 1 into an ultrafiltration membrane assembly to serve as ultrafiltrate, taking flowing pure water as a filtered water acceptor, pumping the pure water into the ultrafiltration membrane assembly from an inlet by using a pressure pump, and keeping the pressure in the ultrafiltration membrane assembly; 3, after the ultrafiltration membrane runs for 6-12 h, detecting the content of chloride ions in the solution in the ultrafiltration membrane set, after the chloride ions reach the standard, opening an outlet of the ultrafiltration membrane set, transferring the solution in the ultrafiltration membrane set into a concentration kettle to be treated, and obtaining a chelating agent product with the needed content; and 4, separating the filtered water to obtain by-products chlorine salt and water, wherein the water is used as flow circulating water for dilution and ultrafiltration. According to the method, the inorganic chlorine salt in the amino acid chelating agent product is separated through the ultrafiltration membrane, the inorganic chlorine salt is efficiently separated through the method, meanwhile, water-soluble organic matter is prevented from being brought out, and the inorganic chlorine salt obtained through separation through the method is dehydrated to obtain a qualified byproduct.
Application Domain
Organic compound preparationUltrafiltration +1
Technology Topic
UltrafiltrationEnvironmental chemistry +7
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