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
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[0047] Step 1: adding pure water to dilute the amino acid chelating agent mother liquor that has been reacted into an aqueous solution with a chelating agent content of 20%;
[0048] Step 2: Transfer the aqueous solution obtained in step 1 into the ultrafiltration membrane module to make ultrafiltrate, use flowing pure water as the filtered water acceptor, close the outlet of the ultrafiltration membrane group, and use a pressure pump to pump pure water from the inlet into the ultrafiltration In the membrane group, the working pressure of the ultrafiltration membrane is controlled at 1.5MPa;
[0049] Step 3: After the ultrafiltration membrane runs for 11.5 hours, detect that the chloride ion content in the solution in the ultrafiltration membrane group is reduced to 0.78%, open the outlet of the ultrafiltration membrane group, transfer the internal solution into the concentration kettle for concentration and dilution treatment, and obtain the required content of chelating agen...
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