A kind of decarbonation process of methionine salt saponification liquid

Abstract

The invention provides a sethionine salt saponified liquid carbonate removing process. Firstly, for ensuring that the methionine salt concentration in bipolar membrane inlet water is 7-10% by weight, sethionine salt saponified liquid is diluted by 0-1.5 times, microporous filtration is performed, then the saponified liquid is sequentially subjected to bipolar membrane treatment and high-temperature heating decarburization treatment, and the removal rate of carbonate in the saponified liquid can be up to 70-100%. The sethionine salt saponified liquid carbonate removing process has the actual advantages that the process combination is reasonable, the carbonate in the saponified liquid can be effectively controlled to be converted into bicarbonate through the bipolar membrane treatment, and meanwhile 4-8% of alkali by weight can be also generated for reuse. By the adoption of the high-temperature heating decarburization treatment, the bicarbonate can be effectively decomposed into CO2, and a decarburization effect is achieved; the high carbonate removing rate can ensure long-term, efficient and stable operation of an ion exchange system in a follow-up process, and the methionine production capacity can be improved; production of a byproduct sulfate or hydrochloride of the ion exchange system is remarkably reduced, meanwhile the alkali consumption is reduced, clean production is achieved, and the operation cost is reduced.

Description

technical field

[0001] The invention belongs to the application of bipolar membrane electrodialysis technology in the field of chemical industry, and in particular relates to a decarbonation technology of methionine salt saponification liquid. Background technique

[0002] DL-methionine, the molecular formula is C 5 h 11 NO 2 S, one of the basic units of protein, is the only amino acid containing sulfur among the essential amino acids. It is closely related to the metabolism of various sulfur-containing compounds in organisms. When methionine is lacking, it will cause loss of appetite, slow growth or no weight gain, kidney enlargement and iron accumulation in the liver, and finally lead to liver necrosis or fibrosis. It is widely used in food industry, feed industry, pharmaceutical industry and chemical industry.

[0003] In 2014, the global feed production increased, the overall supply of methionine was stable, and the demand increased. The global methionine production...

Examples

Embodiment 1

[0030] The main water components of the methionine salt saponification solution are 15wt% sodium methionine, 8wt% sodium carbonate, 1ppm organic matter, and the rest is water. Refer to attached figure 2 , at first in order to guarantee the methionine salt concentration requirement in the bipolar membrane influent water quality, the saponification liquid is diluted 0.5 times, and the sodium methioninate saponification liquid composition after dilution is mainly the sodium methioninate of 10wt%, the sodium carbonate of 5.3wt%. Then use a 5um microporous filter bag to filter the diluted saponification solution.

[0031] Then, the filtrate enters the bipolar membrane system, the salt chamber CO 3 2- Combining H+ produced by bipolar membrane to form HCO3 - , the cations in the saponification solution in the salt chamber enter the alkali chamber through the cation exchange membrane, and combine with the OH produced by the bipolar membrane - The corresponding bases are formed. ...

Embodiment 2

[0035] The main water components of the methionine salt saponification liquid are 16wt% sodium methionine, 10wt% sodium carbonate, 1ppm organic matter, and the rest is water. Refer to attached figure 2 Firstly, in order to ensure the methionine salt concentration requirement in the bipolar membrane influent water quality, the saponification solution is diluted 1.3 times, and the sodium methioninate saponification solution composition after dilution is mainly 7wt% sodium methioninate and 4.3wt% sodium carbonate. Then use a 5um microporous filter bag to filter the diluted saponification solution.

[0036] Then, the filtrate enters the bipolar membrane system, the salt chamber CO 3 2- Combining H+ produced by bipolar membrane to form HCO 3 - , the cations in the saponification solution in the salt chamber enter the alkali chamber through the cation exchange membrane, and combine with the OH produced by the bipolar membrane - The corresponding bases are formed. Among them, ...

technical field

[0001] The invention belongs to the application of bipolar membrane electrodialysis technology in the field of chemical industry, and in particular relates to a decarbonation technology of methionine salt saponification liquid. Background technique

[0002] DL-methionine, the molecular formula is C 5 h 11 NO 2 S, one of the basic units of protein, is the only amino acid containing sulfur among the essential amino acids. It is closely related to the metabolism of various sulfur-containing compounds in organisms. When methionine is lacking, it will cause loss of appetite, slow growth or no weight gain, kidney enlargement and iron accumulation in the liver, and finally lead to liver necrosis or fibrosis. It is widely used in food industry, feed industry, pharmaceutical industry and chemical industry.

[0003] In 2014, the global feed production increased, the overall supply of methionine was stable, and the demand increased. The global methionine production...

Examples

Embodiment 1

[0030] The main water components of the methionine salt saponification solution are 15wt% sodium methionine, 8wt% sodium carbonate, 1ppm organic matter, and the rest is water. Refer to attached figure 2 , at first in order to guarantee the methionine salt concentration requirement in the bipolar membrane influent water quality, the saponification liquid is diluted 0.5 times, and the sodium methioninate saponification liquid composition after dilution is mainly the sodium methioninate of 10wt%, the sodium carbonate of 5.3wt%. Then use a 5um microporous filter bag to filter the diluted saponification solution.

[0031] Then, the filtrate enters the bipolar membrane system, the salt chamber CO 3 2- Combining H+ produced by bipolar membrane to form HCO3 - , the cations in the saponification solution in the salt chamber enter the alkali chamber through the cation exchange membrane, and combine with the OH produced by the bipolar membrane - The corresponding bases are formed. ...

Embodiment 2

[0035] The main water components of the methionine salt saponification liquid are 16wt% sodium methionine, 10wt% sodium carbonate, 1ppm organic matter, and the rest is water. Refer to attached figure 2 Firstly, in order to ensure the methionine salt concentration requirement in the bipolar membrane influent water quality, the saponification solution is diluted 1.3 times, and the sodium methioninate saponification solution composition after dilution is mainly 7wt% sodium methioninate and 4.3wt% sodium carbonate. Then use a 5um microporous filter bag to filter the diluted saponification solution.

[0036] Then, the filtrate enters the bipolar membrane system, the salt chamber CO 3 2- Combining H+ produced by bipolar membrane to form HCO 3 - , the cations in the saponification solution in the salt chamber enter the alkali chamber through the cation exchange membrane, and combine with the OH produced by the bipolar membrane - The corresponding bases are formed. Among them, ...

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