Method for separating taurine in taurine crude product mother solution

Abstract

The invention discloses a method for separating taurine in a taurine crude product mother solution. A plurality of electrodialysis separation systems connected mutually are utilized to perform concentration and separation of a taurine solution and a salt solution on the taurine crude product mother solution. Each electrodialysis separation system comprises a weak salt tank, a strong salt tank and electrodialysis plants connected between the weak salt tank and strong salt tank, wherein an conductivity meter and a pressure pump are arranged below the weak salt tank and strong salt tank; all levels of electrodialysis plants continuously perform electrodialysis separation on the liquids pumped into the weak salt tank and strong salt tank until the conductivity of the separated weak phase salt water is lower than 5ms/cm; when a liquid chromatograph determines that the taurine/salt mass ratio is greater than 9:1, the weak phase salt water is subjected to reduced pressure concentration to obtain the taurine solution; when the conductivity of the strong phase salt water continuously separated by the electrodialysis plants is higher than 200 ms/cm, the thick phase salt water is subjected to reduced pressure concentration to obtain the salt solution, or else, the separation treatment of all levels of electrodialysis plants is continued. The method is simple to operate, and has the advantages of low operating cost and favorable separating effect.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis and separation, in particular to a method for separating high-purity taurine from taurine crude product mother liquor. Background technique [0002] Taurine, also known as taurine, is a sulfur-containing non-protein amino acid, and its chemical name is 2-aminoethanesulfonic acid. It is a sulfur-containing amino acid with various physiological functions in the human body. It is one of the most important amino acids in the human body for brain development, vision enhancement, anti-inflammation, antipyretic, lowering blood pressure, lowering blood sugar, strengthening liver and gallbladder. Taurine has no toxic and side effects, so developed countries attach great importance to its research and application. In recent years, with the in-depth research on its physiological effects and nutritional value, its application has become very extensive. Taurine is widely used as nutritional...

AI Technical Summary

Problems solved by technology

Because the content of inorganic salts in the mother liquor is much higher than that of taurine, the process adopts more concentrated and then hot suction filtration to remove salt, because (NH 4 ) 2 SO 3 , (NH 4 ) 2 SO 4 、Na 2 SO 3 with Na 2 SO 4 It is very easy to stick, and the separation of taurine and inorganic salts is difficult to achieve the desired effect. The whole process directly affects the yield, so the production cost is high, the energy consumption is large, and the labor intensity is high.

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