Comprehensive utilization method of beta-alanine crystallization mother liquor

• Main Authors: NING DONGXUE, GUO CHANGXI, LIU ZHICHENG, LIU DING
• Format: Patent
• Language: Chinese; English
• Published: 20.04.2021
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; NITROGENOUS FERTILISERS

The invention relates to a comprehensive utilization method of beta-alanine crystallization mother liquor, and the method is characterized in that the method comprises the following steps: (1) concentrating the beta-alanine crystallization mother liquor into concentrated liquor with the solid content of 60-90%, adjusting the pH value of the concentrated liquor to 5.0-7.0, adding a calcium salt solution with the concentration of 100-500g/L into the concentrated liquor under a stirring condition, uniformly mixing, performing heating to 60-90 DEG C, and keeping the temperature for 5-60 minutes to prepare a chelated calcium salt solution, wherein the volume ratio of the concentrated solution to the calcium salt solution is (1-5): 1; (2) cooling the chelated calcium salt solution to 20-40 DEG C, preserving heat for 2-4 hours, separating, and respectively collecting filter residues and/or filtrate. The chelating capacity of residual beta-alanine and iminodipropionic acid in the beta-alanine crystallization mother l