CN1446794A - Method for eliminating hydrochloric acid in amino acid solution by using combination process of extraction and conversion - Google Patents
Method for eliminating hydrochloric acid in amino acid solution by using combination process of extraction and conversion Download PDFInfo
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- CN1446794A CN1446794A CN02107649A CN02107649A CN1446794A CN 1446794 A CN1446794 A CN 1446794A CN 02107649 A CN02107649 A CN 02107649A CN 02107649 A CN02107649 A CN 02107649A CN 1446794 A CN1446794 A CN 1446794A
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- acid
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Abstract
A process for removing hydrochloric acid from amino acid solution by extraction-displacement method includes displacing hydrochloric acid binded with amino acid with sulfuric acid, phosphoric acid, or carbonic acid, extracting and separating free hydrochloric acid from amino acid solution with the extractant composed of organic amine and aromatic hydrocarbon, and conventionally removing said sulfuric acid, phosphoric acid and carbonic acid. Its advantage is high effect (more than 95%).
Description
One, technical field
The present invention relates to a kind of hydrochloric acid method in the amino acid solution that removes.
Two, background technology
In the solution that contains amino acid and hydrochloric acid, hydrochloric acid can be divided into two kinds of different existence forms: a kind of is free hydrochloric acid, does not combine with amino acid; Another kind is in conjunction with hydrochloric acid, is to combine with various groups in the amino acid molecular.Usually can adopt underpressure distillation, evaporation to remove a part of free hydrochloric acid, the free hydrochloric acid of a suitable part and whole directly from hydrolyzed solution, removing in conjunction with the very difficult aforesaid method that adopts of hydrochloric acid, can only add the alkali neutralization, this is disadvantageous for further separation and Extraction or purification amino acid.
Retrieve paper and Chinese patent that the china academia periodical at the bottom of the calendar year 2001 is delivered, Shang Weiyou directly removes from amino acid solution fully from free hydrochloric acid and most of relevant report or technological method in conjunction with hydrochloric acid.
Three, summary of the invention
The present invention proposes and adopt extraction and substitution method to unite the most of hydrochloric acid that removes in the amino acid solution, the organic extractant that adopts organic amine and aliphatic hydrocarbon to form is gone on a tour from hydrochloric acid from the direct extracting and separating of amino acid solution, adopt sulfuric acid, phosphoric acid or carbonic acid handle and amino acid bonded hydrochloric acid displaces again in solution, make it to become the free hydrochloric acid that is easy to remove, using the organic extractant of organic amine and aliphatic hydrocarbon composition separates the hydrochloric acid that cements out prior to the acid extraction that is added, repeat said process, removing of hydrochloric acid can be greater than 95%.The sulfuric acid, phosphoric acid or the carbonic acid that are used to replace in conjunction with hydrochloric acid that are added are easy to remove, can do not add alkali carry out directly in and remove most hydrochloric acid in the amino acid solution under the situation of hydrochloric acid, the sulfuric acid, phosphoric acid or the carbonic acid that are used to replace in conjunction with hydrochloric acid that are added adopt short-cut method to remove, and therefore can obtain the very low amino acid solution of hydrochloric amount (in chlorine ion concentration) (height of residual salts acid concentration depends on the requirement of each production process).
It is that organic amine and aliphatic hydrocarbon are formed that the present invention is used for the organic extractant that extracting and separating goes out the free hydrochloric acid of amino acid solution, and organic amine is preferably trialkyl tertiary amine N 235, and aliphatic hydrocarbon is preferably kerosene.
The acid that the present invention is used to replace in conjunction with hydrochloric acid can be sulfuric acid, phosphoric acid or carbonic acid, is preferably sulfuric acid.
Four, specific examples
The present invention is elaborated with following example, and these examples can not be interpreted as it is limitation of the present invention.
Example 1
The pig hair is through the technical hydrochloric acid hydrolysis, hydrochloric about 8.5mol/L.This hydrolyzed solution mixed with the extraction agent of following composition contacts:
Trialkyl tertiary amine (N235) 40%
Kerosene 60% is 2.0 until the pH of hydrolyzed solution, and it is clear to leave standstill until phase-splitting.Crystalline deposit can occur in this operating process, filter, the hydrochloric amount of filtrate aqueous phase (in amount of chloride ions) is about 4mol/L.Till 1: 1 (volume ratio) sulphuric acid soln of filtrate adding was about 2mol/L to sulfuric acid concentration, stir about ten minutes still was extracted into water pH with above-mentioned organic extractant and is about 2.0.Take out water, add while stirring calcium hydroxide to water pH be 3.5, filter, filtrate is 4.8 with the hydrated barta pH that neutralizes again, leaves standstill 36 hours, filters, and collects twice precipitation, distinguishes reclaim(ed) sulfuric acid calcium and barium sulfate.Filtrate continuation is neutralized to neutrality with hydrated barta, the elimination precipitation, and reclaim(ed) sulfuric acid precipitated barium, hydrochloric in the filtrate (in chlorion) are about 0.6mol/L together, repeat said process, and hydrochloric amount (in chlorion) can be reduced to low 0.3mol/L.According to different needs, repeat said process, can get the lower amino acid solution of chloride ion-containing concentration.
Example 2
People's hydrolyzing liquid is caught up with acid through underpressure distillation, the hydrochloric 5.5mol/L that is about.This hydrolyzed solution is contacted with the organic extractant of following composition:
Trialkyl tertiary amine (N235) 40%
Kerosene 60% organic extractant and hydrolyzed solution once added in 1: 2 by volume, mixed contact one hour, and the intensity of stirring is mixing two-phase fully with standard.Leave standstill, phase-splitting, aqueous phase has precipitation, water is taken out filtration together with precipitation, contain the hydrochloric acid (in chlorine) of 4mol/L in the filtrate approximately, add 1: 1 sulphuric acid soln of volume ratio, to sulfuric acid content be 2mol/L, add above-mentioned extraction agent and in the device of Fig. 1, extract, to water pH be 2.0-2.5, tell water, add sodium hydroxide to aqueous phase, to pH be 4.8, filter out precipitation, filtrate was left standstill 8 hours at 0 ℃ of constant temperature, filter the sal glauberi crude product, refining back is a mirabilite hydrate.Repeat said process, the clearance of hydrochloric acid is greater than 95%.As removing the contained a small amount of sodium sulfate of solution fully, the hydrated barta that adds equivalent gets final product.
Claims (5)
1. method that removes hydrochloric acid in the amino acid solution, it is characterized in that: the organic extractant extracting and separating from contain amino acid whose solution that adopts organic amine and aliphatic hydrocarbon to form is gone on a tour from hydrochloric acid, adopt sulfuric acid, phosphoric acid or carbonic acid from amino acid solution, to displace again in conjunction with hydrochloric acid, making in conjunction with hydrochloric acid becomes free hydrochloric acid, and with the organic extractant that organic amine and aliphatic hydrocarbon are formed the hydrochloric acid that is cemented out is removed prior to being used for replacing in conjunction with extracting from amino acid solution of hydrochloric acid.
2. according to the method for claim 1, it is characterized in that described organic amine is selected from the primary amine of the straight or branched of 6-14 carbon atom, secondary amine, tertiary amine.
3. according to the method for claim 1, it is characterized in that described hydrocarbon is the aliphatic hydrocarbon of 6-14 carbon atom.
4. according to the method for claim 1, it is characterized in that the described removal methods in conjunction with hydrochloric acid that combines with amino acid is to adopt sulfuric acid, phosphoric acid or carbonic acid to come out in conjunction with hydrochloric acid displaces earlier, making in conjunction with hydrochloric acid becomes free hydrochloric acid, removes again.
5. according to the method for claim 1, it is characterized in that described amino acid solution is for containing amino acid and aqueous solution of hydrochloric acid, it can be hydrochloric protein hydrolyzate, also amino acid zymotic fluid that can be hydrochloric, or through the various hydrochloric amino acid mixing solution of chemosynthesis, or various through initial gross separation and hydrochloric amino acid mixings solution, and in the middle of the various production process generation contain amino acid and aqueous solution of hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021076499A CN1193004C (en) | 2002-03-22 | 2002-03-22 | Method for eliminating hydrochloric acid in amino acid solution by using combination process of extraction and conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021076499A CN1193004C (en) | 2002-03-22 | 2002-03-22 | Method for eliminating hydrochloric acid in amino acid solution by using combination process of extraction and conversion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446794A true CN1446794A (en) | 2003-10-08 |
| CN1193004C CN1193004C (en) | 2005-03-16 |
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| CNB021076499A Expired - Fee Related CN1193004C (en) | 2002-03-22 | 2002-03-22 | Method for eliminating hydrochloric acid in amino acid solution by using combination process of extraction and conversion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348376A (en) * | 2015-07-17 | 2017-01-25 | 诚信工业有限公司 | Method of separating pollutants from waste water and system thereof |
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2002
- 2002-03-22 CN CNB021076499A patent/CN1193004C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348376A (en) * | 2015-07-17 | 2017-01-25 | 诚信工业有限公司 | Method of separating pollutants from waste water and system thereof |
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| CN1193004C (en) | 2005-03-16 |
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