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Separation and purification process of taurine

A technology for separation and purification of taurine, which is applied in the field of separation and purification of taurine, can solve the problems of low added value of sodium sulfate and increase of production and processing costs, and achieve the effect of clean production

Inactive Publication Date: 2019-12-20
王建峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its main reaction is: CH 2 CH 2 O+NaHSO 3 One by one HOCH 2 CH2SO 3 Na HOCH 2 CH2SO 3 Na+NH 3 ——H 2 NCH 2 CH 2 SO 3 Na+H 2 O H 2 NCH 2 CH 2 SO 3 Na+1 / 2H 2 SO 4 ——H 2 NCH 2 CH 2 SO 3 H+1 / 2Na 2 SO 4 Ethylene oxide method yield is higher, but produces a large amount of sodium sulfate (the sodium sulfate) when being neutralized by sodium taurine feed solution and sulfuric acid, must produce a large amount of sodium sulfate when producing taurine, and as industrial The added value of the by-product sodium sulfate is low, which increases the cost of production and processing

Method used

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Examples

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Embodiment 1

[0031] Pass ethylene oxide into sodium bisulfite solution, specifically, mix ethylene oxide and sodium bisulfite through an ionized multi-channel nozzle device under the action of a catalyst to prepare sodium isethionate The reaction temperature of the solution is 60-75°C, the molar ratio of ethylene oxide to sodium bisulfite is controlled at 1.05-1.10, the pH value during the reaction is controlled at 5.7-6.3, and the yield of sodium isethionate is greater than 95%. .

[0032] In the synthesis section, the mother liquor and supplementary ammonia gas, ammonia water or liquid ammonia are ammonolyzed with sodium isethionate to sodium taurine through an ionized multi-channel nozzle device, and sodium iminodisulfonate and N- Sodium triethanesulfonate is also converted to sodium taurate.

[0033] The sodium taurine solution obtained through high temperature and high pressure synthesis reaction is added to sodium bisulfite to neutralize to pH=5.0-9.0, the temperature is 20-40 DEG C...

Embodiment 2

[0039] Pass ethylene oxide into sodium bisulfite solution, specifically, mix ethylene oxide and sodium bisulfite through an ionized multi-channel nozzle device under the action of a catalyst to prepare sodium isethionate The reaction temperature of the solution is 60-75°C, the molar ratio of ethylene oxide to sodium bisulfite is controlled at 1.05-1.10, the pH value during the reaction is controlled at 5.7-6.3, and the yield of sodium isethionate is greater than 95%. .

[0040] Sodium isethionate is mixed with the reused mother liquor through an ionized multi-channel nozzle device, and then ammonia gas, ammonia water or liquid ammonia is supplemented through the ionized multi-channel nozzle device, and the ammonia content is controlled at 24-34% (w / v ), into the synthesis tower. The reaction temperature is controlled at 230-280°C, the pressure is controlled at 16-21MPa, and the residence time of the material in the tower is not less than 30 minutes. Ammonolysis of sodium ise...

Embodiment 3

[0047] Pass ethylene oxide into sodium bisulfite solution, specifically, mix ethylene oxide and sodium bisulfite through an ionized multi-channel nozzle device under the action of a catalyst to prepare sodium isethionate The reaction temperature of the solution is 60-75°C, the molar ratio of ethylene oxide to sodium bisulfite is controlled at 1.05-1.10, the pH value during the reaction is controlled at 5.7-6.3, and the yield of sodium isethionate is greater than 95%. .

[0048] Sodium isethionate is mixed with the reused mother liquor through an ionized multi-channel nozzle device, and then ammonia gas, ammonia water or liquid ammonia is supplemented through the ionized multi-channel nozzle device, and the ammonia content is controlled at 24-34% (w / v ), into the synthesis tower. The reaction temperature is controlled at 230-280°C, the pressure is controlled at 16-21MPa, and the residence time of the material in the tower is not less than 30 minutes. Ammonolysis of sodium ise...

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Abstract

The invention relates to a separation and purification process of taurine and is applicable to methods for synthesizing taurine from ethylene oxide as a raw material. The process specifically comprises the following steps: mixing ethylene oxide with sodium hydrogen sulfite and other gas, liquid and solid-phase catalysts and nanoparticles by using an ionization multi-channel nozzle device so as toprepare sodium 2-hydroxyethanesulfonate, further performing high-temperature high-pressure treatment and concentration so as to prepare sodium taurate, and neutralizing a sodium taurate liquid by using sodium hydrogen sulfite; and in a ceramic nanometer-sized metallomolecular cage component, performing a self-assembling reaction on a three-tooth bridging ligand with sulfur and nitrogen and divalent nickel, palladium or platinum ions so as to establish a cubic metallic-organic cage in Oh symmetry, and performing exchange of hydrogen ions with sodium ions and solvent molecule catalysis simultaneously, so as to obtain the taurine. Mother liquor is subjected to concentration and separation to obtain sodium sulfite which is used as a raw material of an ethylene oxide reaction, an absorption andtransferring carrier of sulfur dioxide and a raw material for neutralizing the sodium taurate liquid. Waste liquid free circulation production of taurine can be achieved.

Description

technical field [0001] The invention relates to a separation and purification process of taurine. Background technique [0002] The chemical name of taurine is 2-aminoethanesulfonic acid, which is the most abundant sulfur-containing free amino acid in the cells of the body. It is beneficial to the development of the brain, nerves, internal organs, endocrine functions of infants and young children, as well as the absorption of calcium, fat and vitamins. Plays a vital role. And helps adults enhance their physical fitness, prevent disease, relieve fatigue and improve work efficiency. As a nutritional fortifier, it is widely added to a variety of foods, especially breast milk powder. [0003] There are more than ten kinds of laboratory synthesis methods for taurine, but there are only two industrial synthesis methods. That is, esterification sulfonation method (ethanolamine method) and sodium isethionate ammonia solution acidification method (ethylene oxide method). The ethan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/14C07C303/02C07C303/44
CPCC07C303/04C07C303/44C07C309/14
Inventor 王建峰包雅星
Owner 王建峰
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