CN114014752A - Process for decoloring crude lactic acid by using activated carbon - Google Patents
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- CN114014752A CN114014752A CN202111486547.3A CN202111486547A CN114014752A CN 114014752 A CN114014752 A CN 114014752A CN 202111486547 A CN202111486547 A CN 202111486547A CN 114014752 A CN114014752 A CN 114014752A
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- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 title claims abstract description 362
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 235000014655 lactic acid Nutrition 0.000 title claims abstract description 181
- 239000004310 lactic acid Substances 0.000 title claims abstract description 181
- 238000000034 method Methods 0.000 title claims abstract description 72
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 238000004321 preservation Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002835 absorbance Methods 0.000 claims description 40
- 238000000855 fermentation Methods 0.000 claims description 9
- 230000004151 fermentation Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000011085 pressure filtration Methods 0.000 claims description 2
- 238000005903 acid hydrolysis reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 27
- 238000004042 decolorization Methods 0.000 abstract description 22
- 238000001179 sorption measurement Methods 0.000 abstract description 15
- 239000000049 pigment Substances 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 7
- 102000004169 proteins and genes Human genes 0.000 abstract description 7
- 108090000623 proteins and genes Proteins 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 22
- 238000003825 pressing Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000031700 light absorption Effects 0.000 description 3
- LCTONWCANYUPML-UHFFFAOYSA-N Pyruvic acid Chemical compound CC(=O)C(O)=O LCTONWCANYUPML-UHFFFAOYSA-N 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229940107700 pyruvic acid Drugs 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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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
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a process for decoloring crude lactic acid by using activated carbon, which comprises the following steps of S1, heating crude lactic acid in a container; s2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of the crude lactic acid to the activated carbon is 300 ml: 0.5g to 2.0 g; the activated carbon is powdered activated carbon; s3, stirring the mixture obtained in the step S2, preserving the heat, and filtering the mixture while the mixture is hot after 1-3h of heat preservation. The active carbon of the invention is powdered active carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
Description
Technical Field
The invention relates to the technical field of lactic acid decolorization, in particular to a process for decolorizing crude lactic acid by using activated carbon.
Background
At present, with the rise and growth of the lactic acid industry, the requirements on the chromaticity and the quality of the lactic acid in the industry are continuously improved, the process cost of membrane filtration, electrodialysis, double decolorization and the like is higher, and the industrial production is difficult to realize.
In the existing decoloring process of crude lactic acid, natural illumination is mostly used for auxiliary decoloring, and natural light, fluorescent light and the like are used for irradiation so as to reduce the chromaticity. However, this approach has some problems: the natural light treatment method can only degrade photosensitive pyruvic acid, can not completely remove pigments, has too long reaction time and is not suitable for industrial production. Therefore, a process for decoloring crude lactic acid with high adsorption efficiency and strong absorption capacity is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a process for decoloring crude lactic acid by using activated carbon.
The technical scheme adopted by the invention for solving the technical problems is as follows: the process for decoloring crude lactic acid by using the activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container;
s2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of the crude lactic acid to the activated carbon is 300 ml: 0.5g to 2.0 g; the activated carbon is powdered activated carbon;
s3, stirring the mixture obtained in the step S2, preserving the heat, and filtering the mixture while the mixture is hot after 1-3h of heat preservation.
Further comprising S4, decolorizing comparison and decolorizing ratio calculation, wherein crude lactic acid before decolorizing and crude lactic acid after decolorizing are respectively taken to be measured in an ultraviolet spectrophotometer to obtain absorbance, and the absorbance is converted to be recorded and the decolorizing ratio is calculated.
Further, in step S4, the absorbance is measured at a wavelength of 380 nm.
Further, the crude lactic acid in the step S1 is a clear lactic acid solution, and the preparation of the clear lactic acid solution includes subjecting the fermentation broth to acidolysis and pressure filtration to obtain a clear lactic acid solution.
Further, the water content of the activated carbon is 10%.
Further, the preset temperature in the step S2 is 30-100 ℃.
Further, the heat preservation in the step S3 is closed heat preservation.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block flow diagram of an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 19%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 1.2 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 30 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature, and filtering the mixture while the mixture is hot after the temperature is preserved for 3 hours. In this embodiment, the heat preservation is a closed heat preservation treatment.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
And S4, decoloring, comparing and calculating decoloring rate, wherein the method comprises the steps of measuring the absorbance of the crude lactic acid before and after decoloring in an ultraviolet spectrophotometer, converting the absorbance into absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm. In this example, the absorbance of the decolorized clear solution obtained after decolorization was 0.260, the chroma was 127, and the decolorization rate was 97.68%.
The loss in the implementation process of the invention is extremely small, and the waste in the production process of the lactic acid can be effectively avoided; meanwhile, the whole process is short in time consumption, the production efficiency can be obviously improved in production and application, the yield is increased, and a solid foundation is laid for lactic acid production. Finally, the lactic acid decolorized by the process has low chroma, no active carbon residue, high decolorization rate of the lactic acid clear solution and improved competitiveness in the lactic acid market.
Example 2
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 23%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 1.1 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 50 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after preserving the temperature for 2 hours. In this embodiment, the heat preservation is a closed heat preservation treatment.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
And S4, decoloring, comparing and calculating decoloring rate, wherein the method comprises the steps of measuring the absorbance of the crude lactic acid before and after decoloring in an ultraviolet spectrophotometer, converting the absorbance into absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm. In the present embodiment, the light absorption value of the decolorized clear solution obtained after decolorization is 0.230, the chroma is 144, and the decolorization rate is 99.23%.
The loss in the implementation process of the invention is extremely small, and the waste in the production process of the lactic acid can be effectively avoided; meanwhile, the whole process is short in time consumption, the production efficiency can be obviously improved in production and application, the yield is increased, and a solid foundation is laid for lactic acid production. Finally, the lactic acid decolorized by the process has low chroma, no active carbon residue, high decolorization rate of the lactic acid clear solution and improved competitiveness in the lactic acid market.
Example 3
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 21%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 1.0 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 50 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after 1h of heat preservation. In this embodiment, the heat preservation is a closed heat preservation treatment.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
And S4, decoloring, comparing and calculating decoloring rate, wherein the method comprises the steps of measuring the absorbance of the crude lactic acid before and after decoloring in an ultraviolet spectrophotometer, converting the absorbance into absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm. The light absorption value of the decolorized clear liquid obtained after decolorization in this example was 0.250, the chroma was 139, and the decolorization rate was 98.89%.
The loss in the implementation process of the invention is extremely small, and the waste in the production process of the lactic acid can be effectively avoided; meanwhile, the whole process is short in time consumption, the production efficiency can be obviously improved in production and application, the yield is increased, and a solid foundation is laid for lactic acid production. Finally, the lactic acid decolorized by the process has low chroma, no active carbon residue, high decolorization rate of the lactic acid clear solution and improved competitiveness in the lactic acid market.
Example 4
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 22%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 0.8 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 80 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after 1h of heat preservation. In this embodiment, the heat preservation is a closed heat preservation treatment.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
And S4, decoloring, comparing and calculating decoloring rate, wherein the method comprises the steps of measuring the absorbance of the crude lactic acid before and after decoloring in an ultraviolet spectrophotometer, converting the absorbance into absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm. In this example, the light absorption value of the decolored clear solution obtained after the decoloration was 0.240, the chroma was 133, and the decoloration rate was 98.93%.
The loss in the implementation process of the invention is extremely small, and the waste in the production process of the lactic acid can be effectively avoided; meanwhile, the whole process is short in time consumption, the production efficiency can be obviously improved in production and application, the yield is increased, and a solid foundation is laid for lactic acid production. Finally, the lactic acid decolorized by the process has low chroma, no active carbon residue, high decolorization rate of the lactic acid clear solution and improved competitiveness in the lactic acid market.
Example 5
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 20%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 1.1 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 60 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after preserving the temperature for 2 hours. In this embodiment, the heat preservation is a closed heat preservation treatment.
The process for decoloring the crude lactic acid by using the activated carbon has the beneficial effects that the activated carbon is powdered activated carbon, has strong adsorption capacity, can obviously remove the chromaticity of the lactic acid, improves the quality of the lactic acid, and has strong adsorption capacity on impurities such as pigment, protein and the like in the crude lactic acid. The process has the advantages of low temperature required by the conditions, short heat preservation time and high decolorization rate, saves the cost for the production of lactic acid, and improves the efficiency; in addition, the method has simple process steps, can be completed automatically, and does not consume manpower.
And S4, decoloring, comparing and calculating decoloring rate, wherein the method comprises the steps of measuring the absorbance of the crude lactic acid before and after decoloring in an ultraviolet spectrophotometer, converting the absorbance into absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm. In this example, the absorbance of the decolorized clear solution obtained after decolorization was 0.245, the chroma was 136, and the decolorization rate was 98.75%.
Example 6
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 20%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 0.5 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 90 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after preserving the temperature for 2 hours. In this embodiment, the heat preservation is a closed heat preservation treatment.
And S4, decoloring comparison and decoloring rate calculation, wherein the decoloring ratio comprises the steps of measuring the absorbance of the crude lactic acid before decoloring and the absorbance of the crude lactic acid after decoloring in an ultraviolet spectrophotometer, converting the absorbance into the absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm.
Example 7
As shown in fig. 1, the process for decoloring crude lactic acid by using activated carbon comprises the following steps,
s1, heating the crude lactic acid in a container; the crude lactic acid is lactic acid clear liquid, and the preparation of the lactic acid clear liquid comprises the steps of carrying out acidolysis and filter pressing on fermentation liquor to prepare the lactic acid clear liquid. In this example, the concentration of lactic acid was 20%.
S2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of crude lactic acid to activated carbon was 300 ml: 2.0 g; the activated carbon is powdered activated carbon, and the water content of the activated carbon in this example is 10%. The preset temperature is 100 ℃.
S3, stirring the mixture obtained in the step S2, preserving the temperature and filtering the mixture while the mixture is hot after preserving the temperature for 2 hours. In this embodiment, the heat preservation is a closed heat preservation treatment.
And S4, decoloring comparison and decoloring rate calculation, wherein the decoloring ratio comprises the steps of measuring the absorbance of the crude lactic acid before decoloring and the absorbance of the crude lactic acid after decoloring in an ultraviolet spectrophotometer, converting the absorbance into the absorbance, and recording and calculating the decoloring rate. In step S4, the absorbance is measured at a wavelength of 380 nm.
The loss in the implementation process of the invention is extremely small, and the waste in the production process of the lactic acid can be effectively avoided; meanwhile, the whole process is short in time consumption, the production efficiency can be obviously improved in production and application, the yield is increased, and a solid foundation is laid for lactic acid production. Finally, the lactic acid decolorized by the process has low chroma, no active carbon residue, high decolorization rate of the lactic acid clear solution and improved competitiveness in the lactic acid market.
Claims (7)
1. A process for decoloring crude lactic acid by using activated carbon is characterized by comprising the following steps
S1, heating the crude lactic acid in a container;
s2, detecting the temperature of the crude lactic acid, and adding activated carbon after the temperature of the crude lactic acid is raised to a preset temperature; the ratio of the crude lactic acid to the activated carbon is 300 ml: 0.5g to 2.0 g; the activated carbon is powdered activated carbon;
s3, stirring the mixture obtained in the step S2, preserving the heat, and filtering the mixture while the mixture is hot after 1-3h of heat preservation.
2. The process for decoloring crude lactic acid by using activated carbon according to claim 1, further comprising S4, decoloring comparison and decoloring rate calculation, wherein the process comprises the steps of measuring the absorbance of crude lactic acid before decoloring and the absorbance of crude lactic acid after decoloring respectively in an ultraviolet spectrophotometer, converting the absorbance into the absorbance, and recording and calculating the decoloring rate.
3. The process for decoloring crude lactic acid with activated carbon according to claim 2, wherein the absorbance of the crude lactic acid is measured at a wavelength of 380nm in step S4.
4. The process of decolorizing crude lactic acid with activated carbon according to claim 1, wherein the crude lactic acid in step S1 is a clear lactic acid solution, and the preparation of the clear lactic acid solution comprises subjecting the fermentation broth to acid hydrolysis and pressure filtration to obtain a clear lactic acid solution.
5. The process for decoloring crude lactic acid by using activated carbon according to any one of claims 1 to 4, wherein the activated carbon has a water content of 10%.
6. The process for decoloring crude lactic acid with activated carbon according to any one of claims 1 to 4, wherein the preset temperature in the step S2 is 30 to 100 ℃.
7. The process for decoloring crude lactic acid with activated carbon according to any one of claims 1 to 4, wherein the heat preservation in the step S3 is a closed heat preservation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306993A (en) * | 2007-05-14 | 2008-11-19 | 张家港三源生物工程有限公司 | Refine process of L-lactic acid of polymerization grade |
| CN102976923A (en) * | 2012-12-18 | 2013-03-20 | 青岛科海生物有限公司 | New process for extracting lactic acid from lactic acid fermentation liquid |
| CN105254486A (en) * | 2015-11-09 | 2016-01-20 | 山东寿光巨能金玉米开发有限公司 | Novel decoloration process for D-lactic acid |
| CN105646193A (en) * | 2014-12-05 | 2016-06-08 | 中国石油化工股份有限公司 | Method used for separating and extracting lactic acid from fermentation broth |
-
2021
- 2021-12-07 CN CN202111486547.3A patent/CN114014752A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306993A (en) * | 2007-05-14 | 2008-11-19 | 张家港三源生物工程有限公司 | Refine process of L-lactic acid of polymerization grade |
| CN102976923A (en) * | 2012-12-18 | 2013-03-20 | 青岛科海生物有限公司 | New process for extracting lactic acid from lactic acid fermentation liquid |
| CN105646193A (en) * | 2014-12-05 | 2016-06-08 | 中国石油化工股份有限公司 | Method used for separating and extracting lactic acid from fermentation broth |
| CN105254486A (en) * | 2015-11-09 | 2016-01-20 | 山东寿光巨能金玉米开发有限公司 | Novel decoloration process for D-lactic acid |
Non-Patent Citations (1)
| Title |
|---|
| 胡雪琴等: "《食品理化分析技术》", vol. 1, 中国健康传媒集团 中国医药科技出版社, pages: 33 - 34 * |
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