CN102942469A - Binary acid aqueous solution crystallization technology - Google Patents
Binary acid aqueous solution crystallization technology Download PDFInfo
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- CN102942469A CN102942469A CN 201210275543 CN201210275543A CN102942469A CN 102942469 A CN102942469 A CN 102942469A CN 201210275543 CN201210275543 CN 201210275543 CN 201210275543 A CN201210275543 A CN 201210275543A CN 102942469 A CN102942469 A CN 102942469A
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- aqueous solution
- acid aqueous
- binary acid
- crystallization
- diprotic acid
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Abstract
The invention discloses a binary acid aqueous solution crystallization technology. The binary acid aqueous solution crystallization technology comprises the following steps of carrying out decoloration of a binary acid aqueous solution, adding the decolored clear solution, deionized water and concentrated sulfuric acid into an acidification tank, heating the solution in the acidification tank to a temperature of 50 to 60 DEG C, carrying out heat preservation so that a binary acid in the binary acid aqueous solution is crystallized, carrying out heat preservation for 2 to 3 hours, and slowly cooling until the solution in the acidification tank has a temperature of 15 to 20 DEG C so that binary acid crystallization is finished. The binary acid aqueous solution crystallization technology realizes easy control of a fermentation solution crystallization form through control of a fermentation solution temperature and a cooling rate, has simple processes, is convenient for operation and has a low cost.
Description
Technical field
The present invention relates to a kind of crystallization processes of the diprotic acid aqueous solution.
Background technology
Crystal formation is not easy to grasp in crystallization processes, the especially crystallization processes of polyprotonic acid fermented liquid of fermented liquid at present, and mostly adopts the multistage crystallization tank, and cost is higher.
Summary of the invention
Technical problem to be solved by this invention is: a kind of crystallization processes of the diprotic acid aqueous solution is provided, reduces the crystallization cost of polyprotonic acid fermented liquid, convenient control crystal formation.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The technique of a kind of diprotic acid aqueous solution crystallization, its flow process is: at first the diprotic acid aqueous solution is decoloured, decolouring clear liquid, deionized water and the vitriol oil that then will obtain join in the souring tank, insulation after again the liquid in the souring tank being warming up to 50-60 ℃, make the diprotic acid in the diprotic acid aqueous solution carry out crystallization, behind the insulation 2-3h, slow cooling again, liquid to souring tank reaches 15-20 ℃, finishes the diprotic acid crystallization.
Preferably, temperature after the intensification of the liquid in the souring tank is controlled at 55 ℃.
The mass ratio of clear liquid, deionized water and the vitriol oil of decolouring in the such scheme is 100: 10-15: 1-5.The speed of souring tank slow cooling is 3-5 ℃/h.
The invention has the beneficial effects as follows: the present invention utilizes the speed of controlled fermentation liquid temp and cooling, so that the control of fermented liquid Crystal type is easy to grasp, technique is simple, easy to operate simultaneously, and cost is lower.
Description of drawings
The present invention is described in more detail below in conjunction with drawings and Examples.
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, the technique of a kind of diprotic acid aqueous solution crystallization, its flow process is: at first the diprotic acid aqueous solution is decoloured, decolouring clear liquid, deionized water and the vitriol oil that then will obtain join in the souring tank, the mass ratio of decolouring clear liquid, deionized water and the vitriol oil is 100: 10: 1, again the liquid in the souring tank is heated up, make the diprotic acid in the diprotic acid aqueous solution carry out crystallization, temperature is controlled at 60 ℃, behind the insulation 2h, slow cooling again, the speed of cooling is 5 ℃/h, liquid to souring tank reaches 20 ℃, finishes the diprotic acid crystallization.
Embodiment 2
As shown in Figure 1, the technique of a kind of diprotic acid aqueous solution crystallization, its flow process is: at first the diprotic acid aqueous solution is decoloured, decolouring clear liquid, deionized water and the vitriol oil that then will obtain join in the souring tank, the mass ratio of decolouring clear liquid, deionized water and the vitriol oil is 100: 15: 5, again the liquid in the souring tank is heated up, make the diprotic acid in the diprotic acid aqueous solution carry out crystallization, temperature is controlled at 50 ℃, behind the insulation 3h, slow cooling again, the speed of cooling is 3 ℃/h, liquid to souring tank reaches 17 ℃, finishes the diprotic acid crystallization.
Embodiment 3
As shown in Figure 1, the technique of a kind of diprotic acid aqueous solution crystallization, its flow process is: at first the diprotic acid aqueous solution is decoloured, decolouring clear liquid, deionized water and the vitriol oil that then will obtain join in the souring tank, the mass ratio of decolouring clear liquid, deionized water and the vitriol oil is 100: 13: 3, again the liquid in the souring tank is heated up, make the diprotic acid in the diprotic acid aqueous solution carry out crystallization, temperature is controlled at 55 ℃, behind the insulation 2.5h, slow cooling again, the speed of cooling is 4 ℃/h, liquid to souring tank reaches 15 ℃, finishes the diprotic acid crystallization.
Claims (4)
1. the technique of diprotic acid aqueous solution crystallization, its flow process is: at first the diprotic acid aqueous solution is decoloured, decolouring clear liquid, deionized water and the vitriol oil that then will obtain join in the souring tank, insulation after again the liquid in the souring tank being warming up to 50-60 ℃, make the diprotic acid in the diprotic acid aqueous solution carry out crystallization, behind the insulation 2-3h, slow cooling again, liquid to souring tank reaches 15-20 ℃, finishes the diprotic acid crystallization.
2. technique according to claim 1 is characterized in that: insulation after the liquid in the souring tank is warming up to 55 ℃.
3. technique according to claim 1 is characterized in that: the mass ratio of decolouring clear liquid, deionized water and the vitriol oil is 100: 10-15: 1-5.
4. technique according to claim 1, it is characterized in that: the speed of souring tank slow cooling is 3-5 ℃/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210275543 CN102942469A (en) | 2012-08-06 | 2012-08-06 | Binary acid aqueous solution crystallization technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210275543 CN102942469A (en) | 2012-08-06 | 2012-08-06 | Binary acid aqueous solution crystallization technology |
Publications (1)
| Publication Number | Publication Date |
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| CN102942469A true CN102942469A (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210275543 Pending CN102942469A (en) | 2012-08-06 | 2012-08-06 | Binary acid aqueous solution crystallization technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478693A (en) * | 2014-12-23 | 2015-04-01 | 山东丰元化学股份有限公司 | Preparation method of refined oxalic acid |
-
2012
- 2012-08-06 CN CN 201210275543 patent/CN102942469A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478693A (en) * | 2014-12-23 | 2015-04-01 | 山东丰元化学股份有限公司 | Preparation method of refined oxalic acid |
| CN104478693B (en) * | 2014-12-23 | 2016-05-25 | 山东丰元化学股份有限公司 | A kind of preparation method of refining oxalic acid |
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| PB01 | Publication | ||
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Application publication date: 20130227 |