CN101323456A - Habit modifier and method for modifying ammonia sulfate crystal habit - Google Patents
Habit modifier and method for modifying ammonia sulfate crystal habit Download PDFInfo
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- CN101323456A CN101323456A CNA2008100538409A CN200810053840A CN101323456A CN 101323456 A CN101323456 A CN 101323456A CN A2008100538409 A CNA2008100538409 A CN A2008100538409A CN 200810053840 A CN200810053840 A CN 200810053840A CN 101323456 A CN101323456 A CN 101323456A
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- ammonium sulphate
- crystallization agent
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Abstract
The invention discloses a method for carrying out control to the crystal habit of ammonium sulphate crystal by adopting a habit modifier so as to obtain the ammonium sulphate crystal with different crystal habits. The method comprises the following steps: the ammonium sulphate and water are mixed according to the mass portion of 60-85 : 100; 800-1300ppm metallic cation or the dibasic acid habit modifier is added; the solution is heated to 40-50 DEG C; a cooling crystallizing method is adopted, the cooling rate is 8-12 DEG C/h and the temperature is reduced to 8-15 DEG C, thus obtaining the ammonium sulphate crystal with the unique crystal habit under corresponding conditions, which is shown in the attached diagram. The invention provides different methods for preparing the ammonium sulphate crystal with different crystal habits by using different habit modifiers, and the ammonium sulphate crystal has unique crystal habit and high product purity and can be used as raw materials in the fermentation process of certain drugs; the ammonium sulphate crystal prepared by utilizing the dibasic acid as the habit modifier is applicable to producing aggregation ammonium sulphate products with the granularity being more than 2.3mm, and can improve using efficacy as fertilizer.
Description
Technical field
The invention belongs to chemical engineering industrial crystallization technical field, be specifically related to change brilliant medium crystallization agent and the method for practising of ammonia sulfate crystal.
Background technology
Ammonium sulfate, English name are ammonium sulfate, and molecular formula is (NH
4)
2SO
4, molecular weight is 132.13.
Ammonium sulfate is the industrial raw material of agricultural fertilizer and chemical industry, dyeing and weaving, medicine, leather etc., as fertilizer, is applicable to various soil and crop.
The brilliant configuration that refers generally to the crystal outward appearance of practising, the concentrated expression of physical and chemical condition when being crystalline internal structure and formation.Because most crystal is sold as the finished product, its purity and physical strength all depend on brilliant the habit to a great extent, medium crystallization agent, the promptly brilliant modifying agent of practising.
General brilliant habit of ammonium sulfate is approximate rectangular polyhedron, and industrial ammonium sulfate adopts evaporative crystallization, and the brilliant heterogeneity of practising of the product that obtains, thereby influence is suitable for effect.
The present invention adopts an amount of medium crystallization agent of adding to change the brilliant habit of ammonium sulfate, and prepares unique brilliant ammonium sulfate product of practising under the corresponding conditions.The prior art close with the present invention can be referring to Journal of Crystal Growth 212 (2000) 480-488.
Summary of the invention
The objective of the invention is to adopt medium crystallization agent to change the brilliant habit of ammonia sulfate crystal,, further reduce the cost and the operation easier of preparation, improve the inhomogenous problem of the brilliant habit of ammonia sulfate crystal, adopt brilliant habit of medium crystallization agent control ammonia sulfate crystal to overcome the deficiencies in the prior art.
The brilliant medium crystallization agent of practising of change ammonia sulfate crystal of the present invention comprises metallic cation or diprotic acid medium crystallization agent.
Described metallic cation medium crystallization agent is sodium sulfate, sal epsom or ferric sulfate.
Described diprotic acid medium crystallization agent is terephthalic acid, Succinic Acid or hexanodioic acid.
Medium crystallization agent of the present invention changes the brilliant method of practising of ammonia sulfate crystal, be with ammonium sulfate: water is pressed ratio of quality and the number of copies 60-85: 100 mixed, the metallic cation or the diprotic acid medium crystallization agent that add 800-1300ppm, solution is heated to 40-50 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 8-12 ℃/h, reduces to 8-15 ℃, obtains the corresponding brilliant ammonia sulfate crystal of practising.
The invention provides the method that different medium crystallization agents prepares the ammonia sulfate crystal that the isomorphous not practises, it is brilliant practises uniquely, and the product purity height can be used as the raw material of some drugs fermenting process; Utilize diprotic acid to practise to be suitable for the production granularity greater than 2.3 millimeters agglomerate ammonium sulfate product, can improve its use and render a service as chemical fertilizer for the ammonium sulfate of medium crystallization agent preparation is brilliant.
Description of drawings
100 times of electromicroscopic photographs of Fig. 1: embodiment 1 ammonia sulfate crystal;
100 times of electromicroscopic photographs of Fig. 2: embodiment 2 ammonia sulfate crystals;
100 times of electromicroscopic photographs of Fig. 3: embodiment 3 ammonia sulfate crystals;
50 times of electromicroscopic photographs of Fig. 4: embodiment 4 ammonia sulfate crystals;
100 times of electromicroscopic photographs of Fig. 5: embodiment 5 ammonia sulfate crystals;
80 times of electromicroscopic photographs of Fig. 6: embodiment 6 ammonia sulfate crystals.
Embodiment
Following embodiment describes the present invention:
Embodiment 1:
Get ammonium sulfate 60g, deionized water 100g, 800ppm sodium sulfate stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 40 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 10 ℃/h, reduces to 8 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 1.
Embodiment 2:
Get ammonium sulfate 65g, deionized water 100g, 900ppm sal epsom stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 48 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 8 ℃/h, reduces to 9 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 2.
Embodiment 3:
Get ammonium sulfate 70g, deionized water 100g, 1000ppm ferric sulfate stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 43 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 12 ℃/h, reduces to 10 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 3.
Embodiment 4:
Get ammonium sulfate 75g, deionized water 100g, the 1100ppm terephthalic acid stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 42 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 9 ℃/h, reduces to 12 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 4.
Embodiment 5:
Get ammonium sulfate 80g, deionized water 100g, the 1200ppm Succinic Acid stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 45 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 11 ℃/h, reduces to 14 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 5.
Embodiment 6:
Get ammonium sulfate 85g, deionized water 100g, the 1300ppm hexanodioic acid stirs, and heating for dissolving forms uniform solution.Gained solution is continued to be heated to 50 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 9 ℃/h, reduces to 15 ℃.The electromicroscopic photograph of the ammonia sulfate crystal that obtains under this condition as shown in Figure 6.
Claims (4)
1. change the brilliant medium crystallization agent of practising of ammonia sulfate crystal, it is characterized in that comprising metallic cation or diprotic acid medium crystallization agent.
2. medium crystallization agent as claimed in claim 1 is characterized in that described metallic cation medium crystallization agent is sodium sulfate, sal epsom or ferric sulfate.
3. medium crystallization agent as claimed in claim 1 is characterized in that described diprotic acid medium crystallization agent is terephthalic acid, Succinic Acid or hexanodioic acid.
4. change the brilliant method of practising of ammonia sulfate crystal with the described medium crystallization agent of claim 1, it is characterized in that ammonium sulfate: water is pressed ratio of quality and the number of copies 60-85: 100 mixed, the metallic cation or the diprotic acid medium crystallization agent that add 800-1300ppm, solution is heated to 40-50 ℃, adopt the crystallisation by cooling method, rate of temperature fall is 8-12 ℃/h, reduces to 8-15 ℃; Obtain the corresponding brilliant ammonia sulfate crystal of practising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100538409A CN101323456B (en) | 2008-07-14 | 2008-07-14 | Habit modifier and method for modifying ammonia sulfate crystal acquisition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100538409A CN101323456B (en) | 2008-07-14 | 2008-07-14 | Habit modifier and method for modifying ammonia sulfate crystal acquisition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101323456A true CN101323456A (en) | 2008-12-17 |
| CN101323456B CN101323456B (en) | 2011-03-30 |
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| CN2008100538409A Expired - Fee Related CN101323456B (en) | 2008-07-14 | 2008-07-14 | Habit modifier and method for modifying ammonia sulfate crystal acquisition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390844A (en) * | 2011-08-08 | 2012-03-28 | 河北科技大学 | Preparation process of large-grain ammonium sulfate crystals |
| CN103771455A (en) * | 2014-01-08 | 2014-05-07 | 瓮福（集团）有限责任公司 | Method for preparing large particle ammonium sulfate from ardealite |
| CN112724019A (en) * | 2020-12-31 | 2021-04-30 | 河北科技大学 | Preparation method of large-particle-size dihydroxy ethyl terephthalate |
-
2008
- 2008-07-14 CN CN2008100538409A patent/CN101323456B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390844A (en) * | 2011-08-08 | 2012-03-28 | 河北科技大学 | Preparation process of large-grain ammonium sulfate crystals |
| CN102390844B (en) * | 2011-08-08 | 2013-05-29 | 河北科技大学 | Preparation process of large-grain ammonium sulfate crystals |
| CN103771455A (en) * | 2014-01-08 | 2014-05-07 | 瓮福（集团）有限责任公司 | Method for preparing large particle ammonium sulfate from ardealite |
| CN103771455B (en) * | 2014-01-08 | 2015-09-09 | 瓮福（集团）有限责任公司 | A kind of phosphogypsum sulphur ammonium increases the method for sulphur ammonium granularity |
| CN112724019A (en) * | 2020-12-31 | 2021-04-30 | 河北科技大学 | Preparation method of large-particle-size dihydroxy ethyl terephthalate |
| CN112724019B (en) * | 2020-12-31 | 2022-07-08 | 河北科技大学 | Preparation method of large-particle-size dihydroxy ethyl terephthalate |
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| CN101323456B (en) | 2011-03-30 |
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