CN107501082A - A kind of sodium acetate crystal grain does big method - Google Patents
A kind of sodium acetate crystal grain does big method Download PDFInfo
- Publication number
- CN107501082A CN107501082A CN201710879647.XA CN201710879647A CN107501082A CN 107501082 A CN107501082 A CN 107501082A CN 201710879647 A CN201710879647 A CN 201710879647A CN 107501082 A CN107501082 A CN 107501082A
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- China
- Prior art keywords
- sodium acetate
- temperature
- crystal
- solution
- crystal seed
- Prior art date
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- 235000017281 sodium acetate Nutrition 0.000 title claims abstract description 43
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 title claims abstract description 42
- 239000001632 sodium acetate Substances 0.000 title claims abstract description 42
- 239000013078 crystal Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000010583 slow cooling Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 7
- 230000008025 crystallization Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 description 1
- -1 Dichlorodiphenyl Acetate sodium Chemical compound 0.000 description 1
- BDKZHNJTLHOSDW-UHFFFAOYSA-N [Na].CC(O)=O Chemical compound [Na].CC(O)=O BDKZHNJTLHOSDW-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of sodium acetate crystal grain to do big method, and it includes following methods step：1), will be at a temperature of 110, and the sodium acetate solution that Baume degrees is 28 carries out slow cooling, temperature when sodium acetate solution has just enter into Metastable zone is temperature spot when reaching saturation state；2) sodium acetate crystal seed, is added into the sodium acetate solution of saturation, its calculation formula is：Ms=(Ls/La)3Ma, Ms represents the quality of crystal seed in formula, and Ls represents the granularity of crystal seed, and La represents the granularity of target crystal, and Ma represents the quality of target crystal；3) continue to cool after, adding sodium acetate crystal seed in upper step, then solution continues in temperature-fall period, you can obtains the larger sodium acetate crystal grain of particle.The present invention can be very good to increase sodium acetate crystalline particle, and in crystallization process, solution temperature will not go up, and will not thus increase crystallization time, improve crystalline rate.
Description
Technical field
The invention belongs to sodium acetate preparing technical field, and in particular to a kind of sodium acetate crystal grain does big method.
Background technology
Sodium acetate is also known as sodium acetate or sodium acetate trihydrate, and the crystalline solid of colorless and odorless in atmosphere can be by weathering.
Water and ether are dissolved in, is slightly soluble in ethanol.It is mainly used in printing and dyeing industry, medicine, photograph, plating, chemical reagent and organic synthesis, specially
For hot-water bottle, heat is precious, dim pin is precious, the production of dim water bag, cartoon dim handbag, electric hot-water bag, solid alcohol, it is also possible to is esterified
Agent, preservative.Sodium acetate content is 58%~60%.Current domestic citrulling recrystallization technology is that citrulling crude product is dissolved in into water
In, high temperature Dichlorodiphenyl Acetate sodium solution is concentrated, and it is 28 mother-in-law U.S. degree between 30 mother-in-law U.S. degree (110 DEG C) to be concentrated to mother-in-law U.S. degree, concentration
Solution afterwards is filled into temperature-reducing tower, and when cooling to 60 DEG C, solution is squeezed into crystallizer again, opens the logical 30 DEG C circulation of stirring
Water cools, and when cooling to 30 DEG C or so, filters solution, obtains acetic acid sodium crystal.In this technique in crystallization process, crystal is certainly
So separate out, so finally crystal all very littles out, and particle is also uneven.
The content of the invention
It is an object of the invention to provide a kind of sodium acetate crystal grain to do big method.The present invention can be very good to increase
Sodium acetate crystalline particle, and in crystallization process, solution temperature will not go up, and will not thus increase crystallization time, improve
Crystalline rate.
The technical solution adopted by the present invention：A kind of sodium acetate crystal grain does big method, and it includes following methods step：
1), will be at a temperature of 110, and the sodium acetate solution that Baume degrees is 28 carries out slow cooling, and it is steady to treat that sodium acetate solution has just enter into Jie
Temperature during area is temperature spot when reaching saturation state；2) sodium acetate crystal seed, is added into the sodium acetate solution of saturation, it is counted
Calculating formula is：Ms=(Ls/La)3Ma, Ms represents the quality of crystal seed in formula, and Ls represents the granularity of crystal seed, and La represents target crystalline substance
The granularity of body, Ma represent the quality of target crystal；3), in upper step add sodium acetate crystal seed after continue to cool, then solution after
In continuous temperature-fall period, you can obtain the larger sodium acetate crystal grain of particle.
Further, it is that saturation point is 49 degree at temperature of the sodium acetate solution in temperature-fall period.
Its advantage is the present invention compared with prior art：The present invention can be very good to increase sodium acetate crystalline particle,
It and in crystallization process, solution temperature will not go up, will not thus increase crystallization time, improve crystalline rate.
Embodiment
A kind of sodium acetate crystal grain does big method, and it includes following methods step：1) saturation temperature of solution, is determined
Point：Will be at a temperature of 110, and the sodium acetate solution that Baume degrees is 28 carries out slow cooling, and it is steady to treat that sodium acetate solution has just enter into Jie
Temperature during area is temperature spot when reaching saturation state；2) sodium acetate crystal seed, is added into the sodium acetate solution of saturation, it is counted
Calculating formula is：Ms=(Ls/La)3Ma, Ms represents the quality of crystal seed in formula, and Ls represents the granularity of crystal seed, and La represents target crystalline substance
The granularity of body, Ma represent the quality of target crystal；3), in upper step add sodium acetate crystal seed after continue to cool, then solution after
In continuous temperature-fall period, you can obtain the larger sodium acetate crystal grain of particle.
Specific embodiment is：If it is required that crystal size is original three times, 270KG solution is taken, yield is 50%, then
Ma is exactly 270*50%=135KG, Ls/La=1/3, then the crystal seed quality for needing to add is exactly 5KG.
Claims (2)
1. a kind of sodium acetate crystal grain does big method, it is characterised in that it includes following methods step：
1), will be at a temperature of 110, and the sodium acetate solution that Baume degrees is 28 carries out slow cooling, treats that sodium acetate solution has just enter into
Temperature during Metastable zone is temperature spot when reaching saturation state；
2) sodium acetate crystal seed, is added into the sodium acetate solution of saturation, its calculation formula is：Ms=(Ls/La)3Ma, Ms in formula
The quality of crystal seed is represented, Ls represents the granularity of crystal seed, and La represents the granularity of target crystal, and Ma represents the quality of target crystal；
3), in upper step add sodium acetate crystal seed after continue to cool, then solution continue temperature-fall period in, you can obtain particle compared with
Big sodium acetate crystal grain.
2. a kind of sodium acetate crystal grain according to claim 1 does big method, it is characterised in that the sodium acetate is molten
Liquid is that saturation point is 49 degree at the temperature in temperature-fall period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879647.XA CN107501082A (en) | 2017-09-26 | 2017-09-26 | A kind of sodium acetate crystal grain does big method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879647.XA CN107501082A (en) | 2017-09-26 | 2017-09-26 | A kind of sodium acetate crystal grain does big method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107501082A true CN107501082A (en) | 2017-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710879647.XA Pending CN107501082A (en) | 2017-09-26 | 2017-09-26 | A kind of sodium acetate crystal grain does big method |
Country Status (1)
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| CN (1) | CN107501082A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110451548A (en) * | 2019-09-23 | 2019-11-15 | 山西北化关铝化工有限公司 | Spherical narrow granularity barium nitrate of one kind and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747173A (en) * | 2008-12-03 | 2010-06-23 | 辽阳市宏伟区合成催化剂厂 | Method utilizing acetic acid in PTA oxidation residues to prepare sodium acetate trihydrate |
| CN102617324A (en) * | 2012-02-24 | 2012-08-01 | 浙江金科过氧化物股份有限公司 | Crystal size controllable continuous crystallization process of sodium acetate trihydrate |
| CN107686445A (en) * | 2017-09-22 | 2018-02-13 | 山西卓联锐科科技有限公司 | A kind of method for improving sodium acetate crystallographic granularity |
-
2017
- 2017-09-26 CN CN201710879647.XA patent/CN107501082A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747173A (en) * | 2008-12-03 | 2010-06-23 | 辽阳市宏伟区合成催化剂厂 | Method utilizing acetic acid in PTA oxidation residues to prepare sodium acetate trihydrate |
| CN102617324A (en) * | 2012-02-24 | 2012-08-01 | 浙江金科过氧化物股份有限公司 | Crystal size controllable continuous crystallization process of sodium acetate trihydrate |
| CN107686445A (en) * | 2017-09-22 | 2018-02-13 | 山西卓联锐科科技有限公司 | A kind of method for improving sodium acetate crystallographic granularity |
Non-Patent Citations (1)
| Title |
|---|
| 张纲等: "沉淀结晶过程中的添加晶种技术", 《化学世界》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110451548A (en) * | 2019-09-23 | 2019-11-15 | 山西北化关铝化工有限公司 | Spherical narrow granularity barium nitrate of one kind and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171222 |
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| WD01 | Invention patent application deemed withdrawn after publication |