CN114307389A - Filtering method for improving citric acid extraction yield and feed liquid quality - Google Patents
Filtering method for improving citric acid extraction yield and feed liquid quality Download PDFInfo
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- CN114307389A CN114307389A CN202111537238.4A CN202111537238A CN114307389A CN 114307389 A CN114307389 A CN 114307389A CN 202111537238 A CN202111537238 A CN 202111537238A CN 114307389 A CN114307389 A CN 114307389A
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 238000001914 filtration Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 238000000605 extraction Methods 0.000 title claims abstract description 25
- 239000000706 filtrate Substances 0.000 claims abstract description 52
- 239000000243 solution Substances 0.000 claims abstract description 32
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 24
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 21
- 239000012265 solid product Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 239000011259 mixed solution Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 26
- 238000011001 backwashing Methods 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 16
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 238000011175 product filtration Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000012065 filter cake Substances 0.000 description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 16
- FNAQSUUGMSOBHW-UHFFFAOYSA-H calcium citrate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FNAQSUUGMSOBHW-UHFFFAOYSA-H 0.000 description 14
- 239000001354 calcium citrate Substances 0.000 description 14
- 235000013337 tricalcium citrate Nutrition 0.000 description 14
- 239000002699 waste material Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- PFKGDYCESFRMAP-UHFFFAOYSA-L dicalcium citrate Chemical compound [Ca+2].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O PFKGDYCESFRMAP-UHFFFAOYSA-L 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 3
- 230000004151 fermentation Effects 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- -1 calcium hydrogen Chemical class 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a filtering method for improving the extraction yield and the quality of feed liquid of citric acid, which comprises the following steps: (1) and preliminarily filtering the neutralization solution or decomposition solution in the citric acid production process, reserving a solid product filtering layer in a filter, and collecting filtrate for later use. (2) And (2) adding part of the neutralization solution or decomposition solution into the filtrate obtained in the step (1), and uniformly mixing to obtain a mixed solution for later use. (3) And (3) placing the mixed solution obtained in the step (2) into the filter which retains the solid product filtering layer obtained in the step (1) for filtering, and collecting the solid product. The method effectively solves the problems of incomplete material recovery, poor labor environment and high labor intensity of personnel in the operation process of the existing citric acid extraction and filtration process, and the problems of poor effect and increased production cost due to the need of adding a filter aid for secondary filtration.
Description
Technical Field
The invention relates to the technical field of citric acid preparation, in particular to a filtering method for improving the extraction yield and the quality of feed liquid of citric acid.
Background
The information in this background section is disclosed to enhance understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms part of the prior art already known to a person of ordinary skill in the art.
Citric acid is an important organic acid and has extremely wide application in industries such as industry, food industry, cosmetics and the like. At present, the domestic extraction method of citric acid is mainly a calcium hydrogen method, namely, calcium carbonate or calcium hydroxide slurry with certain concentration and citric acid fermentation clear liquid obtained by microbial fermentation are subjected to neutralization reaction to obtain neutralization liquid, and calcium citrate is separated from the neutralization liquid in a filtration mode (first step of solid-liquid separation). And (3) continuously reacting the obtained calcium citrate with a citric acid fermentation liquor to generate calcium hydrogen citrate, filtering to obtain the calcium hydrogen citrate (solid-liquid separation in the second step), carrying out acidolysis on the calcium hydrogen citrate to obtain a decomposition liquid containing citric acid and calcium sulfate solids, filtering the decomposition liquid (solid-liquid separation in the third step), decoloring, and then entering the next process. It can be seen that three-step solid-liquid separation mainly exists in the extraction process of the calcium hydrogen method in the production of citric acid at present, namely the separation of calcium citrate and waste sugar water, the separation of calcium hydrogen citrate and weak acid, and the separation of decomposition liquid and calcium sulfate.
At present, equipment used in the solid-liquid separation process is generally a vacuum belt filter, in the separation process of calcium citrate and waste sugar water, part of calcium citrate with fine particles cannot be intercepted by filter cloth and enters a waste water treatment process along with the waste sugar water to cause material waste, although part of citric acid production enterprises also use plate frames to carry out secondary filtration on the waste sugar water, the operation environment is poor, the operation cost is high, and the equipment is not generally adopted. In the process of separating calcium sulfate from the decomposition liquid, part of calcium sulfate with fine particles and impurities carbonized by sulfuric acid enter the citric acid filtrate serving as the main component, so that the quality of the filtrate is influenced.
Disclosure of Invention
The invention aims to solve the problems of incomplete material recovery, poor labor environment and high labor intensity of personnel in the operation process of the existing citric acid extraction and filtration process, and in addition, the problem of poor effect and increased production cost due to the fact that a filter aid is required to be added for secondary filtration. Therefore, the invention provides a filtering method for improving the extraction yield and the quality of the feed liquid of the citric acid, and the method can effectively solve the loss of the citric acid in the filtering process. In order to achieve the purpose, the invention discloses the following technical scheme.
A filtering method for improving the extraction yield of citric acid and the quality of feed liquid comprises the following steps:
(1) and preliminarily filtering the neutralization solution or decomposition solution in the citric acid production process, reserving a solid product filtering layer in a filter, and collecting filtrate for later use. In this step, the filter layer helps to retain the smaller particles of solid material in the subsequent filtration.
(2) And (2) adding part of the neutralization solution or decomposition solution into the filtrate obtained in the step (1), and uniformly mixing to obtain a mixed solution for later use. In the step, the neutralization solution or the decomposition solution which is not filtered is added into the filtrate, so that the solid material in the filtrate plays a role in increasing the permeability of a filter cake in the secondary filtering process, and the filtering effect is improved.
(3) And (3) placing the mixed solution obtained in the step (2) into the filter which retains the solid product filtering layer obtained in the step (1) for filtering, and collecting the solid product.
Further, in the step (1), the thickness of the solid product filtering layer is not less than 4mm, and preferably between 5 and 7 mm. The undersize thickness of the filtering layer is not easy to play an effective filtering and intercepting effect on small-particle solid products.
Further, in the step (2), the filtrate may be all the filtrate obtained in the step (1), or may be the filtrate with poor quality after the filtration in the step (1). Preferably, the filtrate with poor quality refers to the filtrate with solid content of more than 150 mg/L.
Further, in the step (2), the amount of the neutralizing solution or the decomposing solution added is such that the solid content of the mixed solution is not less than 1%, and preferably, is maintained in the range of 3 to 5%. Solid with too low fine particles in the solid content of the mixed solution can form a dense filter layer, so that the filtering efficiency is reduced, and the thickness of the filter layer can be increased due to too high solid content, so that the permeation of the filtrate is influenced, and the filtering efficiency is influenced.
Further, step (3) includes a step of washing the collected solid product to remove soluble substances in the solid product.
Optionally, the washing process adopts a reverse multi-stage backwashing process, and preferably, the backwashing times are not less than 2.
Further, in the step (1), the filter is a vacuum belt filter, and preferably, the vacuum degree of the vacuum belt filter during filtering is not more than-0.01 MPa.
Compared with the prior art, the invention has the following beneficial and unique effects: according to the invention, a filtering layer is formed by primary filtering, and the neutralization solution or decomposition solution which is not subjected to filtering treatment is added into the filtrate collected by primary filtering, so that the loss of solid products in the filtering process of citric acid production is effectively solved, the citric acid extraction process is shortened, the labor intensity is reduced, the investment of raw and auxiliary materials is reduced, the production cost is saved, the overall yield of citric acid and the quality of decomposition solution are improved, and the post-process treatment difficulty is reduced. This is because: on the one hand, the primary filtrate contains a large amount of residual solid product, which is difficult to separate out by conventional repeated filtration because of the fine particles. And after the neutralization solution or the decomposition solution is added, the solid material contained in the neutralization solution plays a role in increasing the permeability of a filter cake during secondary filtration. On the other hand, by forming a solid product filter layer during the preliminary filtration, the solid product filter layer can play a role of a filter aid precoating layer when the filtrate added with the neutralizing liquid or the decomposing liquid is subjected to secondary filtration, and the effect of intercepting small-particle solids is realized because the gaps among solid particles in the solid product filter layer are small, and when the filtrate passes through the filter layer in the secondary filtration, the small-particle solids in the filtrate cannot pass through the gaps among the filter layer particles and are never intercepted. Tests prove that after the method is adopted, the content of calcium citrate in the waste sugar water is reduced by over 75 percent, the turbidity of the decomposition liquid is reduced by 24 percent, the labor cost is saved by 10 percent, and the filter aid in the decomposition liquid is not needed, but the neutralization liquid or the decomposition liquid is directly filtered by adopting the synergistic effect of the filter liquid, so that the production cost is reduced, and the overall yield of the citric acid and the quality of the decomposition liquid are improved.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The reagents or starting materials used in the present invention can be purchased from conventional sources, and unless otherwise specified, the reagents or starting materials used in the present invention can be used in a conventional manner in the art or in accordance with the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred methods and materials described in this invention are exemplary only. The invention will now be further illustrated with reference to specific examples.
Example 1
A filtering method for improving the extraction yield of citric acid and the quality of feed liquid comprises the following steps:
(1) passing neutralization solution (mainly composed of calcium citrate and waste sugar water, wherein the mass fraction of calcium citrate is 8.1%) in citric acid production process through a filter area of 40m2The vacuum belt filter is used for preliminary filtration, the rotating speed and the discharging speed of the vacuum belt filter are adjusted to ensure that the thickness of the filter cake reaches about 4.6mm, and the filter cake is kept in the filter. Meanwhile, the length of the feed end of the vacuum belt filter is collected to be about 4m2The filtrate in the filtering area is reserved, the filtrate in other parts of the vacuum belt filter is discharged outside, and the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering.
(2) The length of the feed end of the vacuum belt filter in the step (1) is about 4m2The filtrate in the filtration zone and the neutralization solution (mainly composed of calcium citrate and waste sugar water) in the citric acid production process are mixed and stirred uniformly to obtain a mixed solution with the solid content of 3.13 percent.
(3) And (3) returning the mixed liquor obtained in the step (2) to the vacuum belt filter in the step (1), utilizing the filter cake to filter the mixed liquor again, collecting all the obtained filter cakes when the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering, collecting the filtrate and measuring the solid content of the filtrate.
(4) And (4) washing the filter cake obtained in the step (3) by using water to remove soluble substances in the filter cake, wherein the washing procedure adopts a reverse multi-stage backwashing process, and the backwashing times are 3.
Example 2
A filtering method for improving the extraction yield of citric acid and the quality of feed liquid comprises the following steps:
(1) the decomposition liquid in the citric acid production procedure (mainly comprising citric acid and calcium sulfate solid water, wherein the mass fraction of calcium citrate is 25.4%) is filtered by a filter with the area of 60m2The vacuum belt filter is used for preliminary filtration, the rotating speed and the discharging speed of the vacuum belt filter are adjusted to ensure that the thickness of the filter cake reaches about 5.2mm, and the filter cake is kept in the filter. Meanwhile, the length of the feed end of the vacuum belt filter is collected to be about 4m2The filtrate (the solid content is 720 mg/L) in the filtering area is reserved, the filtrate at other parts of the vacuum belt filter is discharged outside, and the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering.
(2) The length of the feed end of the vacuum belt filter in the step (1) is about 4m2And (3) mixing the filtrate in the filtering area and the decomposition liquid same as the step (1), and uniformly stirring to obtain a mixed solution with the solid content of 4.46%.
(3) And (3) returning the mixed liquid obtained in the step (2) to the vacuum belt filter in the step (1), utilizing the filter cake to filter the mixed liquid again, collecting all the obtained filter cakes when the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering, collecting the filtrate and measuring the turbidity of the filtrate.
(4) And (4) washing the filter cake obtained in the step (3) by using water to remove soluble substances in the filter cake, wherein the washing procedure adopts a reverse multi-stage backwashing process, and the backwashing times are 3.
Example 3
A filtering method for improving the extraction yield of citric acid and the quality of feed liquid comprises the following steps:
(1) passing neutralization solution (mainly composed of calcium citrate and waste sugar water, wherein the mass fraction of calcium citrate is 7.4%) in citric acid production process through a filter area of 40m2The vacuum belt filter is used for preliminary filtration, the rotating speed and the discharging speed of the vacuum belt filter are adjusted to ensure that the thickness of the filter cake reaches about 4.1mm, and the filter cake is kept in the filter. Meanwhile, the length of the feed end of the vacuum belt filter is collected to be about 4m2The filtrate in the filtering area is reserved, the filtrate in other parts of the vacuum belt filter is discharged outside, and the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering.
(2) The length of the feed end of the vacuum belt filter in the step (1) is about 4m2And (3) mixing the filtrate in the filtration area and the neutralization solution in the step (1) and uniformly stirring to obtain a mixed solution with the solid content of 1.06%.
(3) And (3) returning the mixed liquor obtained in the step (2) to the vacuum belt filter in the step (1), utilizing the filter cake to filter the mixed liquor again, collecting all the obtained filter cakes when the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering, collecting the filtrate and measuring the solid content of the filtrate.
(4) And (4) washing the filter cake obtained in the step (3) by using water to remove soluble substances in the filter cake, wherein the washing procedure adopts a reverse multi-stage backwashing process, and the backwashing times are 2.
Example 4
A filtering method for improving the extraction yield of citric acid and the quality of feed liquid comprises the following steps:
(1) the decomposition liquid in the citric acid production procedure (mainly comprising citric acid and calcium sulfate solid water, wherein the mass fraction of the calcium sulfate is 26.7%) is filtered by a filter with the filtering area of 60m2The vacuum belt filter is used for preliminary filtration, the rotating speed and the discharging speed of the vacuum belt filter are adjusted to ensure that the thickness of the filter cake reaches about 5.6mm, and the filter cake is kept in the filter. Meanwhile, the length of the feed end of the vacuum belt filter is collected to be about 4m2Of filtering areasThe filtrate (the solid content is 863 mg/L) is reserved, the filtrate of other parts of the vacuum belt filter is discharged outside, and the vacuum degree of the vacuum belt filter is-0.01 MPa during the filtration.
(2) The length of the feed end of the vacuum belt filter in the step (1) is about 4m2And (3) mixing the filtrate in the filtration zone and the decomposition liquid same as the step (1), and uniformly stirring to obtain a mixed solution with the solid content of 4.97%.
(3) And (3) returning the mixed liquid obtained in the step (2) to the vacuum belt filter in the step (1), utilizing the filter cake to filter the mixed liquid again, collecting all the obtained filter cakes when the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering, collecting the filtrate and measuring the turbidity of the filtrate.
(4) And (4) washing the filter cake obtained in the step (3) by using water to remove soluble substances in the filter cake, wherein a reverse multi-stage backwashing process is adopted in the washing process, and the backwashing times are 4.
First comparative example
The neutralization solution of the same batch as the neutralization solution of the embodiment 1 is filtered by a traditional process, and the method specifically comprises the following steps: passing neutralization solution (mainly composed of calcium citrate and waste sugar water) in citric acid production process through filter area of 40m2And filtering by using a vacuum belt filter, wherein the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering. And adjusting the rotating speed and the discharging speed of the vacuum belt filter to ensure that no water is accumulated on the surface of the calcium citrate filter cake before backwashing, and collecting all discharged filtrate to detect the solid content. And washing the obtained filter cake with water to remove soluble substances in the filter cake, wherein the washing procedure adopts a reverse multi-stage backwashing process, and the backwashing times are 3.
Second comparative example
The same batch of decomposition liquid as in example 2 is filtered by a conventional process, which specifically comprises the following steps: the decomposition liquid (mainly comprising citric acid and calcium sulfate solid water) in the citric acid production process is filtered by a vacuum belt filter with the filtering area of 60m2, and the vacuum degree of the vacuum belt filter is-0.01 MPa during filtering. Adjusting the rotating speed and the discharging speed of the vacuum belt filter to enable the thickness of a filter cake to reach about 4.7mm, washing the obtained filter cake with water to remove soluble substances in the filter cake, wherein a reverse multistage backwashing process is adopted in the washing process, and the backwashing times are 4 times. All the filtrate from the filtration zone of the vacuum belt filter (with a solids content of 816 mg/L) was collected and passed into a plate frame for further filtration (1-2 mm perlite filter aid precoated in the plate frame), and the filtrate was collected for turbidity determination.
The filtrate obtained in step (3) of the above example and the filtrate obtained in the comparative example were tested for solid content or turbidity, and the results are shown in Table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | |
| Solid content (mg/L) | 42.2 | 49.6 | 210 | |||
| Turbidity (NTU) | 7.4 | 6.6 | 10.7 | |||
| Filter aid dosage (kg/t) | 0 | 0 | 0 | 0 | 0 | 1.5 |
It can be seen that the problem of incomplete material recovery in the citric acid extraction and filtration process in the traditional process is effectively solved after the treatment process of the embodiment of the invention. Among them, in the case of using the filter aid, the turbidity of the filtrate obtained was still higher than that of examples 2 and 4, and the main reason for this was that the precoat layer formed by the perlite filter aid used in the plate frame filtration in the precoating was thin and the uniformity of the precoat thickness of each part of the plate frame could not be ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A filtering method for improving the extraction yield of citric acid and the quality of feed liquid is characterized by comprising the following steps:
(1) preliminarily filtering a neutralization solution or a decomposition solution in the citric acid production process, reserving a solid product filtering layer in a filter, and collecting filtrate for later use;
(2) adding part of the neutralization solution or decomposition solution into the filtrate obtained in the step (1), and uniformly mixing to obtain a mixed solution for later use;
(3) and (3) placing the mixed solution obtained in the step (2) into the filter which retains the solid product filtering layer obtained in the step (1) for filtering, and collecting the solid product.
2. The filtration method for improving the extraction yield and the quality of the feed liquid of the citric acid according to claim 1, wherein in the step (1), the thickness of the solid product filtration layer is not less than 4mm, preferably between 5 and 7 mm.
3. The filtration method for improving the extraction yield and the feed liquid quality of citric acid according to claim 1, wherein in the step (2), the filtrate is all of the filtrate obtained in the step (1) or the filtrate with poor quality after the filtration in the step (1); preferably, the filtrate with poor quality refers to the filtrate with solid content of more than 150 mg/L.
4. The filtration method for improving the extraction yield and quality of the citric acid solution according to claim 1, wherein in the step (2), the amount of the neutralizing solution or the decomposing solution is added so that the solid content of the mixed solution is not less than 1%, preferably 3 to 5%.
5. The filtration method for improving the extraction yield and quality of citric acid according to any one of claims 1 to 4, wherein the step (3) further comprises a step of washing the collected solid product.
6. The filtration method for improving the extraction yield and the feed liquid quality of citric acid according to claim 5, wherein the washing process adopts a reverse multistage backwashing process.
7. The filtration method for improving the extraction yield and feed quality of citric acid according to claim 6, wherein the number of backwashing is not less than 2.
8. The filtration method for improving the extraction yield and quality of citric acid according to any one of claims 1 to 4, wherein in the step (1), the filter is a vacuum belt filter.
9. The filtration method for improving the extraction yield and quality of the citric acid according to claim 8, wherein the vacuum degree of the vacuum belt filter is not more than-0.01 MPa during the filtration.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR570557A (en) * | 1922-12-13 | 1924-05-03 | Citric acid extraction process | |
| JPH0648979A (en) * | 1992-07-29 | 1994-02-22 | Idemitsu Petrochem Co Ltd | Method for purifying citric acid |
| RU2108389C1 (en) * | 1996-09-26 | 1998-04-10 | Государственный научно-исследовательский институт биосинтеза белковых веществ | Citric acid production line |
| CN101781190A (en) * | 2010-03-23 | 2010-07-21 | 安徽丰原发酵技术工程研究有限公司 | Method for extracting refined citric acid from citric acid fermentation liquid |
| CN101914580A (en) * | 2010-07-14 | 2010-12-15 | 莱芜泰禾生化有限公司 | Calcium salt method for producing citric acid by recycling waste residues calcium sulfate |
| CN102040509A (en) * | 2009-10-23 | 2011-05-04 | 中粮集团有限公司 | Method for preparing citric acid |
| CN102091453A (en) * | 2010-12-29 | 2011-06-15 | 日照金禾博源生化有限公司 | Plate-and-frame filter press used in citric acid production process and solid-liquid separating method thereof |
| CN201932960U (en) * | 2010-11-24 | 2011-08-17 | 潍坊英轩实业有限公司 | Washing water utilizing device for lemon acid sugar washing procedure |
| CN201959641U (en) * | 2010-11-24 | 2011-09-07 | 潍坊英轩实业有限公司 | Citric-acid washing working-procedure washing-water utilizing device |
| CN102210953A (en) * | 2011-05-06 | 2011-10-12 | 江南大学 | Solid-liquid separation method of citric acid fermentation liquid |
| CN102249894A (en) * | 2010-12-13 | 2011-11-23 | 日照金禾博源生化有限公司 | Method for filtering and clarifying citric acid fermentation broth |
| CN102358639A (en) * | 2011-09-16 | 2012-02-22 | 中粮生物化学（安徽）股份有限公司 | Method for processing waste liquid containing calcium citrate |
| CN202730042U (en) * | 2012-05-11 | 2013-02-13 | 湖南洞庭柠檬酸化学有限公司 | Washing water utilizing device for acid washing step by citric acid |
| CN103664569A (en) * | 2012-09-24 | 2014-03-26 | 中国科学院过程工程研究所 | Method for cleanly producing citric acid by coupling calcium salt method with precipitation displacement |
| CN104159649A (en) * | 2012-02-06 | 2014-11-19 | 安德里兹公司 | Method for removing the precoat layer of a rotary filter |
| CN105001078A (en) * | 2015-07-15 | 2015-10-28 | 潍坊英轩实业有限公司 | Clean production method for extracting citric acid from citric acid fermented clear liquid |
| CN110143868A (en) * | 2019-06-18 | 2019-08-20 | 潍坊英轩实业有限公司 | A kind of method that sodium citrate mother liquor removes iron |
-
2021
- 2021-12-16 CN CN202111537238.4A patent/CN114307389A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR570557A (en) * | 1922-12-13 | 1924-05-03 | Citric acid extraction process | |
| JPH0648979A (en) * | 1992-07-29 | 1994-02-22 | Idemitsu Petrochem Co Ltd | Method for purifying citric acid |
| RU2108389C1 (en) * | 1996-09-26 | 1998-04-10 | Государственный научно-исследовательский институт биосинтеза белковых веществ | Citric acid production line |
| CN102040509A (en) * | 2009-10-23 | 2011-05-04 | 中粮集团有限公司 | Method for preparing citric acid |
| CN101781190A (en) * | 2010-03-23 | 2010-07-21 | 安徽丰原发酵技术工程研究有限公司 | Method for extracting refined citric acid from citric acid fermentation liquid |
| CN101914580A (en) * | 2010-07-14 | 2010-12-15 | 莱芜泰禾生化有限公司 | Calcium salt method for producing citric acid by recycling waste residues calcium sulfate |
| CN201959641U (en) * | 2010-11-24 | 2011-09-07 | 潍坊英轩实业有限公司 | Citric-acid washing working-procedure washing-water utilizing device |
| CN201932960U (en) * | 2010-11-24 | 2011-08-17 | 潍坊英轩实业有限公司 | Washing water utilizing device for lemon acid sugar washing procedure |
| CN102249894A (en) * | 2010-12-13 | 2011-11-23 | 日照金禾博源生化有限公司 | Method for filtering and clarifying citric acid fermentation broth |
| CN102091453A (en) * | 2010-12-29 | 2011-06-15 | 日照金禾博源生化有限公司 | Plate-and-frame filter press used in citric acid production process and solid-liquid separating method thereof |
| CN102210953A (en) * | 2011-05-06 | 2011-10-12 | 江南大学 | Solid-liquid separation method of citric acid fermentation liquid |
| CN102358639A (en) * | 2011-09-16 | 2012-02-22 | 中粮生物化学（安徽）股份有限公司 | Method for processing waste liquid containing calcium citrate |
| CN104159649A (en) * | 2012-02-06 | 2014-11-19 | 安德里兹公司 | Method for removing the precoat layer of a rotary filter |
| CN202730042U (en) * | 2012-05-11 | 2013-02-13 | 湖南洞庭柠檬酸化学有限公司 | Washing water utilizing device for acid washing step by citric acid |
| CN103664569A (en) * | 2012-09-24 | 2014-03-26 | 中国科学院过程工程研究所 | Method for cleanly producing citric acid by coupling calcium salt method with precipitation displacement |
| CN105001078A (en) * | 2015-07-15 | 2015-10-28 | 潍坊英轩实业有限公司 | Clean production method for extracting citric acid from citric acid fermented clear liquid |
| CN110143868A (en) * | 2019-06-18 | 2019-08-20 | 潍坊英轩实业有限公司 | A kind of method that sodium citrate mother liquor removes iron |
Non-Patent Citations (1)
| Title |
|---|
| 宋渊 主编: "《发酵工程》", 30 April 2017, 中国农业大学出版社 * |
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