CN109180458A - A kind of method of sodium lactate acidolysis production lactic acid - Google Patents
A kind of method of sodium lactate acidolysis production lactic acid Download PDFInfo
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- CN109180458A CN109180458A CN201811004905.0A CN201811004905A CN109180458A CN 109180458 A CN109180458 A CN 109180458A CN 201811004905 A CN201811004905 A CN 201811004905A CN 109180458 A CN109180458 A CN 109180458A
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- lactic acid
- lactic
- sodium lactate
- sodium
- acid solution
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/02—Preparation of carboxylic acids or their salts, halides or anhydrides from salts of carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
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Abstract
The present invention relates to a kind of method of sodium lactate acidolysis production lactic acid, steps are as follows: 1) lactic fermentation liquid is separated by filtration thallus by membrane filtration system and obtains filtrate；2) the dual chamber electrodialysis that filtrate is alternately placed through cationic homogeneous membrane and zwitterion Bipolar Membrane dissociates to obtain lactic acid and sodium hydroxide；3) sodium hydroxide returns to lactic fermentation process as neutralizer, and lactic acid solution is decolourized with active carbon；4) lactic acid solution after decolourizing is handled through storng-acid cation exchange resin, and remaining sodium lactate is all acid hydrolysis into lactic acid；5) treated, and lactic acid solution carries out multiple-effect evaporation concentration or MVR evaporation and concentration；6) lactic acid carries out short-path distillation purification after being concentrated, and liquid lactic product is made.The present invention produces lactic acid using sodium salt method, eliminates the calcium sulfate solid waste that calcium salt method generates, and reduces the discharge of ion-exchange regenerative wastewater, is conducive to conservation of nature environment.
Description
Technical field
The invention belongs to chemical production technical fields, are related to a kind of method of sodium lactate acidolysis production lactic acid.
Background technique
Lactic acid is one of big organic acid in the world three, it can be widely used in the fields such as food, medicine, chemical industry and agricultural.
Lactic acid can be widely used in medicine, chemical industry and agriculture field.The preparation method of lactic acid has fermentation method, chemical synthesis and enzyme
Method.Wherein, fermentation method and chemical synthesis obtain industrial application, and China mainly uses fermentation method.
Traditional lactic acid extraction process is calcium lactate acidolysis, i.e. calcium lactate fermentation solution-flocculation sedimentation filtering-fermentation clear liquid
Prevapourising-plus sulfuric acid solution simultaneously filter out calcium sulfate precipitation-lactic acid solution activity carbon decoloring-lactic acid solution ion exchange-cream
Production liquid lactic acid refine-is made in sour concentration-short-path distillation.The technical maturity is easily controllable, long but there are process routes,
The disadvantages of unit operation is more, and waste liquor contamination is serious, and energy consumption is higher, lactic acid loss late is also higher, generally between 10~15%, and
The product quality of acquisition is lower.
As production acid PH is gradually decreased in lactic fermentation process, too low PH can seriously affect continuing for fermentation, institute
With need fermentation process be continuously added into alkali carry out in and.Existing lactic acid enterprise is all that calcium hydroxide is added to neutralize, and fermentation is completed
The tunning obtained afterwards is calcium lactate, and rear extract has a large amount of calcium sulfate solid wastes to generate.
Summary of the invention
The object of the present invention is to provide a kind of methods of sodium lactate acidolysis production lactic acid, produce lactic acid using sodium salt method, disappear
Except the calcium sulfate solid waste that calcium salt method generates, the discharge of ion-exchange regenerative wastewater, conservation of nature environment are reduced.
The technical scheme is that the method for sodium lactate acidolysis production lactic acid, includes the following steps:
1) lactic fermentation liquid is separated by filtration thallus by membrane filtration system and obtains filtrate；
2) filtrate is dissociated through bipolar membrane electrodialysis device, obtains lactic acid solution and sodium hydroxide solution；
3) sodium hydroxide solution returns to lactic fermentation process as neutralizer, and lactic acid solution is decolourized with active carbon, is gone
Except the impurity in solution；
4) lactic acid solution after decolourizing is handled through storng-acid cation exchange resin, and remaining sodium lactate acidolysis is at lactic acid；
5) treated that lactic acid solution is evaporated concentration for storng-acid cation exchange resin, after concentration concentration be 75~
80%；
6) lactic acid carries out short-path distillation purification after being concentrated, and liquid lactic product is made.
Bipolar membrane electrodialysis device is the dual chamber electrodialysis dress that cationic homogeneous membrane and zwitterion Bipolar Membrane are alternately placed
It sets.The structure for the dual chamber electrodialysis plant that cationic homogeneous membrane and zwitterion Bipolar Membrane are alternately placed is plate and frame.Lactic acid hair
The process of ferment is neutralized with sodium hydroxide as neutralizer, and tunning is sodium lactate.Sodium lactate is dissociated through bipolar membrane electrodialysis
At lactic acid and sodium hydroxide, sodium hydroxide returns to fermentation and is used as neutralizer.
The method of sodium lactate acidolysis production lactic acid of the present invention is alternately placed with cationic homogeneous membrane and zwitterion Bipolar Membrane
Dual chamber electrodialysis plant dissociated, obtain lactic acid and sodium hydroxide solution.The lactic acid solution that sodium lactate solution dissociates
It is handled using storng-acid cation exchange resin, remaining sodium lactate is all acid hydrolysis into lactic acid.Compared with prior art, originally
Advantageous effect of the invention is that existing calcium salt method production lactic acid is 1. changed to sodium salt method production lactic acid, eliminates the sulphur that calcium salt method generates
Sour calcium (gypsum) solid waste mitigates environmental pollution.2. compared with calcium salt method production technology, ion-exchange regenerative wastewater discharge reduce 50% with
On, be conducive to conservation of nature environment.3. sodium hydroxide solution returns to lactic fermentation process as neutralizer, lactic acid is advantageously reduced
Production cost is increased economic efficiency.
Detailed description of the invention
Fig. 1 is the process flow chart that sodium lactate acidolysis of the present invention produces lactic acid；
Fig. 2 is the structure principle chart of bipolar membrane electrodialysis device；
Wherein: 1-positive plate, 2-cationic homogeneous membranes, 3-zwitterion Bipolar Membranes, 4-negative plates.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is described in detail.The scope of protection of the present invention is not limited to the embodiment,
Those skilled in the art make any change within the scope of the claims and also belong to the scope of protection of the invention.
The process of sodium lactate acidolysis production lactic acid of the present invention is as shown in Figure 1, include the following steps:
1) lactic fermentation liquid is separated by filtration thallus by membrane separator and obtains filtrate；
2) the dual chamber electrodialysis plant that filtrate is alternately placed through cationic homogeneous membrane and zwitterion Bipolar Membrane is dissociated,
Obtain lactic acid solution and sodium hydroxide solution；Filtrate is 35~40 DEG C by the temperature of dual chamber electrodialysis plant.
3) sodium hydroxide returns to lactic fermentation process as neutralizer, and lactic acid solution is decolourized with active carbon, removes molten
Impurity in liquid；
4) lactic acid solution after decolourizing is handled through storng-acid cation exchange resin, and remaining sodium lactate is all acid hydrolysis into
Lactic acid；The model 732# of storng-acid cation exchange resin.
5) storng-acid cation exchange resin treated lactic acid solution carries out multiple-effect evaporation concentration, and concentration is 75 after concentration
~80%；Evaporating temperature is 60~95 DEG C, and vacuum degree is -88~-15KPa.
6) lactic acid carries out short-path distillation purification after being concentrated, and liquid lactic product is made, and the equipment of short-path distillation is scraper-type
Short-distance distiller.
As shown in Fig. 2, dual chamber electrodialysis plant is plate and frame structure, including positive plate 1, cationic homogeneous membrane 2, yin-yang from
Sub- Bipolar Membrane 3 and negative plate 4.Muti-piece cation homogeneous membrane and zwitterion Bipolar Membrane are alternately placed.Lactic acid fermented process is used
Sodium hydroxide is neutralized as neutralizer, and the tunning obtained after fermentation is sodium lactate.Hydrogen-oxygen is used in lactic fermentation
Change the sodium lactate solution that sodium neutralizes, sodium lactate solution is alternately placed double through cationic homogeneous membrane and zwitterion Bipolar Membrane
The synergistic effect of room electrodialysis plant dissociation and the acidolysis of storng-acid cation exchange resin, obtains the lactic acid of high conversion, passes through
Testing inspection electrodialysis dissociation control conversion ratio has good economy 95~97%.Sodium hydroxide solution after dissociation
Concentration control is in 5% (weight) hereinafter, return lactic fermentation process not only reduces solid waste discharge, Er Qieyou as neutralizer
Conducive to production of lactic acid cost is reduced, increase economic efficiency.
Claims (4)
1. a kind of method of sodium lactate acidolysis production lactic acid, includes the following steps:
1) lactic fermentation liquid is separated by filtration thallus by membrane filtration system and obtains filtrate；
2) filtrate is dissociated through bipolar membrane electrodialysis device, obtains lactic acid solution and sodium hydroxide solution；
3) sodium hydroxide returns to lactic fermentation process as neutralizer, and the lactic acid solution is decolourized with active carbon；
4) lactic acid solution after decolourizing is handled through storng-acid cation exchange resin, and remaining sodium lactate is all acid hydrolysis into cream
Acid；
5) treated that lactic acid solution is evaporated concentration for storng-acid cation exchange resin, and concentration is 75~80% after concentration；
6) lactic acid carries out short-path distillation purification after being concentrated, and liquid lactic product is made.
2. the method for sodium lactate acidolysis production lactic acid according to claim 1, it is characterized in that: the bipolar membrane electrodialysis device
The dual chamber electrodialysis plant alternately placed for cationic homogeneous membrane (2) and zwitterion Bipolar Membrane (3).
3. the method for sodium lactate acidolysis production lactic acid according to claim 2, it is characterized in that: the bipolar membrane electrodialysis device
For plate and frame structure.
4. the method for sodium lactate acidolysis production lactic acid according to claim 1, it is characterized in that: the lactic acid fermented process is used
Sodium hydroxide is neutralized as neutralizer, and tunning is sodium lactate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811004905.0A CN109180458A (en) | 2018-08-30 | 2018-08-30 | A kind of method of sodium lactate acidolysis production lactic acid |
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| CN201811004905.0A CN109180458A (en) | 2018-08-30 | 2018-08-30 | A kind of method of sodium lactate acidolysis production lactic acid |
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| CN109180458A true CN109180458A (en) | 2019-01-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110577467A (en) * | 2019-09-18 | 2019-12-17 | 重庆医药高等专科学校 | Synthetic method of 3-hydroxypropionic acid |
| CN113527088A (en) * | 2021-07-20 | 2021-10-22 | 山东元泰生物工程有限公司 | Method for extracting sodium lactate from nisin waste liquid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007756A (en) * | 2006-01-25 | 2007-08-01 | 上海同杰良生物材料有限公司 | Technical process of preparing high-purity L-lactic acid |
| CN101392273A (en) * | 2008-11-10 | 2009-03-25 | 南京工业大学 | Clean production process of lactic acid |
| CN102351685A (en) * | 2011-08-12 | 2012-02-15 | 山东祥瑞药业有限公司 | Process for purifying and refining L-lactic acid fermentation liquor |
-
2018
- 2018-08-30 CN CN201811004905.0A patent/CN109180458A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007756A (en) * | 2006-01-25 | 2007-08-01 | 上海同杰良生物材料有限公司 | Technical process of preparing high-purity L-lactic acid |
| CN101392273A (en) * | 2008-11-10 | 2009-03-25 | 南京工业大学 | Clean production process of lactic acid |
| CN102351685A (en) * | 2011-08-12 | 2012-02-15 | 山东祥瑞药业有限公司 | Process for purifying and refining L-lactic acid fermentation liquor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110577467A (en) * | 2019-09-18 | 2019-12-17 | 重庆医药高等专科学校 | Synthetic method of 3-hydroxypropionic acid |
| CN113527088A (en) * | 2021-07-20 | 2021-10-22 | 山东元泰生物工程有限公司 | Method for extracting sodium lactate from nisin waste liquid |
| CN113527088B (en) * | 2021-07-20 | 2024-02-20 | 山东元泰生物工程有限公司 | Method for extracting sodium lactate from nisin waste liquid |
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