CN1775729A - Method for producing high-purity citric acid - Google Patents
Method for producing high-purity citric acid Download PDFInfo
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- CN1775729A CN1775729A CN 200510045256 CN200510045256A CN1775729A CN 1775729 A CN1775729 A CN 1775729A CN 200510045256 CN200510045256 CN 200510045256 CN 200510045256 A CN200510045256 A CN 200510045256A CN 1775729 A CN1775729 A CN 1775729A
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- citric acid
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Abstract
The invention relates to a method for producing high purity citric acid, mainly solving the problem of low purity products of the existing technical production. On the basis of the existing technique, the black aspergillus culture strains adopted in the fermenting procedure is made by screening, domesticating and rejuvenating on the conditions of temperature 34-36 deg.C, humidity 74-76% and wort concentration of culture medium 11Be-13Be; in the filtering procedure, the invention adopts novel ceramic membrane in the filtering range below 1mm, and the test shows the filter membrane does not change. The invention has high fermenting conversion able to reach 97%, fewer impurities and high product purity.
Description
Affiliated technical field
The invention belongs to a kind of biochemical technology, refer more particularly to the production method of high-purity citric acid.
Background technology
The production technology of existing known citric acid mainly be adopt fermentation, filter, concentrate, crystallization, centrifugal, dry, packaging process.The citric acid that production purity is high is on above-mentioned technology basis, common finished lemon acid is produced the elaboration citric acid by operations such as heavy molten, filtration, recrystallization, centrifugal, dry, packings, for reducing impurity, transform the non-airtight operation in the above-mentioned technological process as the fully-closed operation, isolate introduced contaminants, enter in the material to prevent impurity.But these methods only can be controlled introduced contaminants, do not reduce for the impurity that self produces in the fermenting process, improve product purity thereby need further to purify." elaboration citric acid high density is filtered production technology " that Shandong Province information institute Resources Construction center provides, employing has strengthened the mode of thickness of filter bed, and certain refining effect is arranged, but can only filter the impurity more than 10 microns, and increased production cost, reduced output.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of high-purity citric acid is to overcome the low problem of product purity that prior art is produced.
The present invention develops on the prior art basis.Following technological process is specifically arranged:
One, raw material is handled, two, throw in strain fermentation, the aspergillus niger strain that fermentation is adopted is at temperature 34-36 ℃, humidity 74-76%, screening under the substratum wort concentration 11Be-13Be condition, domestication, rejuvenation form, and three, filter, adopt filter area at the new ceramics film below 1 micron, four, from friendship, five, condensing crystal, six, centrifugal, dry, packing.The bacterial classification that adopts in the above-mentioned fermenting process is preferably 34.9 ℃ of temperature, humidity 74.8%, the aspergillus niger strain of cultivating during substratum wort concentration 12.1Be.
The production method of high-purity citric acid of the present invention improves fermentation conversion rate and reaches more than 5%, can effectively reduce the impurity that biological process produces.
Example 1
Select for use maize raw material through liquefaction processing, in fermentor tank, ferment, the bacterial classification of throwing in is the aspergillus niger strain of cultivating when 35.6 ℃ of temperature, humidity 74.5%, substratum wort concentration 12.1Be, with above-mentioned fermented liquid by filter area at the new ceramics membrane filtration below 1 micron, filtrate is carried out ion-exchange, again with after the ion-exchange liquid concentrates from handing over, crystallization, centrifugal, dry, pack and get final product, this method fermentation conversion rate can reach 97.8%, impurity is less, and fermentation broth viscosity reduces.
Example 2
Technological process is with example 1, and the bacterial classification that throw in this moment is the aspergillus niger strain of cultivating when 34.9 ℃ of temperature, humidity 74.8%, substratum wort concentration 12.1Be, and fermentation conversion rate is 98.3%, and impurity is few, and fermentation broth viscosity reduces greatly.
Example 3
Technological process is with example 1, and the bacterial classification that throw in this moment is the aspergillus niger strain of cultivating when 35.6 ℃ of temperature, humidity 74.2%, substratum wort concentration 11.8Be, and fermentation conversion rate is 98.1%, and impurity is less, and fermentation broth viscosity reduces.
Claims (2)
1, a kind of production method of high-purity citric acid, comprise raw material handle, filter, from friendship, condensing crystal, centrifugal, dry, packaging process, it is characterized in that the screening under temperature 34-36 ℃, humidity 74-76%, substratum wort concentration 11Be-13Be condition of the aspergillus niger strain that adopts in the fermentation procedure, domestication, rejuvenation form; Filter operation and adopt the new ceramics film of filter area below 1 picometre.
2, according to the production method of claims 1 described high-purity citric acid, the aspergillus niger strain that it is characterized in that fermenting and adopt 34.9 ℃ of temperature, humidity 74.8%, substratum wort concentration 12.1Be to cultivate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100452565A CN100386439C (en) | 2005-11-28 | 2005-11-28 | Method for producing high-purity citric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100452565A CN100386439C (en) | 2005-11-28 | 2005-11-28 | Method for producing high-purity citric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775729A true CN1775729A (en) | 2006-05-24 |
| CN100386439C CN100386439C (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100452565A Active CN100386439C (en) | 2005-11-28 | 2005-11-28 | Method for producing high-purity citric acid |
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| CN (1) | CN100386439C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260717A (en) * | 2011-06-16 | 2011-11-30 | 山东柠檬生化有限公司 | Method for producing citric acid by fermentation |
| CN101636500B (en) * | 2007-03-08 | 2013-08-28 | 阿德库端木营养控股有限责任公司 | Citric acid production |
| CN114426481A (en) * | 2021-12-30 | 2022-05-03 | 福建省延润膜环保科技有限公司 | Method for producing citric acid by biological fermentation coupled bipolar membrane electrodialysis technology |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1296580A1 (en) * | 1984-11-26 | 1987-03-15 | Ленинградский межотраслевой научно-исследовательский институт пищевой промышленности | Method for producing citric acid |
| SU1317025A1 (en) * | 1985-07-17 | 1987-06-15 | Кемеровский технологический институт пищевой промышленности | Method for producing citric acid |
| WO1997010350A1 (en) * | 1995-09-11 | 1997-03-20 | Likospol S.R.O. | Process, apparatus and microorganism strain for the manufacture of citric acid |
| CN1393564A (en) * | 2001-07-04 | 2003-01-29 | 上海新立工业微生物科技有限公司 | Process for preparing citric acd by fermentation and bacterial strain for it |
| CN1318597C (en) * | 2004-12-28 | 2007-05-30 | 郭冰 | New method of producing citric acid using paddy fermentation |
-
2005
- 2005-11-28 CN CNB2005100452565A patent/CN100386439C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636500B (en) * | 2007-03-08 | 2013-08-28 | 阿德库端木营养控股有限责任公司 | Citric acid production |
| CN102260717A (en) * | 2011-06-16 | 2011-11-30 | 山东柠檬生化有限公司 | Method for producing citric acid by fermentation |
| CN114426481A (en) * | 2021-12-30 | 2022-05-03 | 福建省延润膜环保科技有限公司 | Method for producing citric acid by biological fermentation coupled bipolar membrane electrodialysis technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100386439C (en) | 2008-05-07 |
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