Liquid-liquid separation device and method for liquid methionine production

Abstract

The invention discloses a liquid-liquid separation device and method for liquid methionine production. The device comprises a separation container, a super-hydrophilic filtering net / super-hydrophobicfiltering net and a movable fixing part, wherein the super-hydrophilic filtering net / super-hydrophobic filtering net is assembled in the separation container; and the moveable fixing part is used formounting and positioning the super-hydrophilic filtering net / super-hydrophobic filtering net in the separation container. Due to adoption of the super-hydrophilic filtering net / super-hydrophobic filtering net, liquid methionine and a water-phase solution can be completely isolated, separation and collection of the liquid methionine and the water-phase solution are achieved, and the separation purity and the separation efficiency of the liquid methionine are further improved.

Description

technical field [0001] The invention belongs to the technical field of liquid methionine production, and relates to a liquid-liquid two-phase separation device and method used in the production process of liquid methionine. Background technique [0002] Liquid methionine (MHA) is a high-concentration aqueous solution of 2-hydroxy-4-methylthiobutyric acid, which has strong acidity. As a substitute for methionine, because of its special structural properties, it not only has the nutritional function of methionine, but also can It exerts biological functions such as acidifier and antibiotic that methionine does not have, and is widely used in feed additives. Liquid methionine can be converted into L-methionine in animals, which can be used as an essential amino acid to synthesize body protein in animals, which can improve growth performance; it can be converted into cystine to play the role of liver protection and detoxification; it can also provide active hydroxyl groups, Cho...

AI Technical Summary

Problems solved by technology

[0004] At present, the oil-water two-phase separation is mainly carried out by gravity settling, but the density difference between the oil-water two-phase in the liquid methionine-ammonium sulfate-water system is small, the phase separation rate is slow, and the phase interface is not clear, which hinders the stability of the production system. Control and Automated control poses great difficulties

In addition, there are still many shortcomings in the separation of liquid methionine and saturated ammonium sulfate solution: (1) the common organic separation membrane materials used in the separation process are mainly cellulose acetate (CA), polysulfone (PS) , polyacrylonitrile (PAN), polyethersulfone (POS), etc., and these organic separation membrane materials will make the liquid methionine emulsion stand still, making separation difficult and incomplete, resulting in an unpleasant smell in the lower ammonium sulfate, And have certain viscosity, be difficult to dry, have almost no utilization value, also can cause the loss of liquid methionine bigger, and yield is lower; (2) adopt existing separation membrane material to liquid methionine and saturated ammonium sulfate solution two-phase Separation will make the separation time longer, and back-mixing phenomenon will easily occur, resulting in higher cost and energy consumption; (3) The existing separation membrane materials have relatively high separation resistance, and it is difficult to avoid swelling of the omentum in contact with oil , will lead to a certain loss of liquid methionine product

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