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A carbon dioxide-assisted bipolar membrane electrodialysis system and production method for amino acid production

A bipolar membrane electrodialysis, carbon dioxide technology, applied in electrodialysis, chemical instruments and methods, membrane technology, etc., can solve problems such as increasing production costs, improve recovery efficiency, expand industrial application potential, and reduce membrane pollution. Effect

Active Publication Date: 2020-06-26
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at this time, the alkali in the solution will neutralize the added inorganic acid to obtain NH 4 Cl, NaCl, Na 2 SO 4 and other products, which will increase the salt content in the feed liquid, thereby increasing the production cost

Method used

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  • A carbon dioxide-assisted bipolar membrane electrodialysis system and production method for amino acid production
  • A carbon dioxide-assisted bipolar membrane electrodialysis system and production method for amino acid production
  • A carbon dioxide-assisted bipolar membrane electrodialysis system and production method for amino acid production

Examples

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Effect test

Embodiment 1

[0061] This embodiment utilizes the above-mentioned carbon dioxide-assisted bipolar membrane electrodialysis system to produce methionine, and the raw material used is a mixed solution of sodium methionine and sodium carbonate (wherein the concentration of sodium methionine is 0.1mol / L, and the concentration of sodium carbonate is 0.2mol / L), Use high-purity carbon dioxide gas as the carbon dioxide gas source.

[0062] Among them, the electrodialysis membrane stack used is composed of bipolar membranes, cation exchange membranes and anion exchange membranes alternately stacked in sequence, plus flow channel spacers and sealing gaskets. A total of four bipolar membranes, three cation exchange membranes, Three anion exchange membranes form three repeating units of "alkali chamber-feed liquid chamber-acid chamber" in the electrodialysis membrane stack. The bipolar membrane, anion exchange membrane and cation exchange membrane used in the process are respectively BP-I, JAM-II and J...

Embodiment 2

[0070] This embodiment utilizes the same carbon dioxide-assisted bipolar membrane electrodialysis system as in Example 1 to produce methionine, and the raw material used is a mixed solution of sodium methionine and sodium carbonate (wherein the concentration of sodium methionine is 0.1mol / L, and the concentration of sodium carbonate is 0.2mol / L), using simulated flue gas of 70% nitrogen + 30% carbon dioxide as the source of carbon dioxide.

[0071] The carbon dioxide gas source is mixed with high-purity carbon dioxide gas and high-purity nitrogen gas. The carbon dioxide gas tank 14 is connected to the carbon dioxide gas flow meter 16a, and the carbon dioxide gas intake flow rate is adjusted to 70-80mL / min. The nitrogen gas tank 15 is connected to the nitrogen gas flow rate. Meter 16b, adjust the nitrogen gas intake flow rate at 168-187mL / min, the carbon dioxide gas flow meter 16a and the nitrogen gas flow meter 16b are connected to the gas mixer 17 at the same time, and the ga...

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Abstract

The invention discloses a carbon dioxide assisted bipolar membrane electrodialysis system and a production method for amino acid production. The carbon dioxide assisted bipolar membrane electrodialysis system is characterized by consisting of a bipolar membrane electrodialysis device and a carbon dioxide assisting device, wherein repetitive units of ''alkali chambers-material liquid chambers-acid chambers'' are formed inside the bipolar membrane electrodialysis device; corresponding storage tanks are additionally arranged inside the bipolar membrane electrodialysis device; and the carbon dioxide assisting device is used for introducing a gas containing carbon dioxide into a material liquid storage tank, so that amino acid salt and CO2 can be converted into corresponding neutral amino acid through an adsorption equilibrium reaction. As amino acid is separated and produced by using the carbon dioxide assisted bipolar membrane electrodialysis system, the recycling efficiency of the amino acid in the electrodialysis process can be improved without introduction of extra acid, and in addition, membrane pollution can be reduced, and the operation cost can be lowered.

Description

technical field [0001] The invention relates to a bipolar membrane electrodialysis system and a production method for amino acid production. Background technique [0002] Amino acids are substances necessary for human metabolism, generally divided into essential amino acids and non-essential amino acids, non-essential amino acids such as alanine, arginine, aspartic acid, etc. can be synthesized in the body, and essential amino acids such as alanine, arginine Amino acid, methionine (methionine), etc. need to be supplemented through in vitro intake. As the demand for amino acids continues to increase, a suitable production process is needed to improve the production efficiency of amino acids to meet the needs. [0003] The traditional amino acid preparation process includes fermentation method and chemical synthesis method. Taking methionine as an example, its chemical synthesis process route is as follows: figure 1 As shown, intermediates of sodium methionine and sodium car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/44B01D61/48B01D61/52B01D61/54C01B32/50C07C319/28C07C323/58
CPCB01D61/445B01D61/485B01D61/52B01D61/54C07C319/28C07C323/58
Inventor 徐铜文蒋晨啸汪耀明
Owner UNIV OF SCI & TECH OF CHINA
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