CN1240661C - One-step process for preparing sodium biacetate - Google Patents
One-step process for preparing sodium biacetate Download PDFInfo
- Publication number
- CN1240661C CN1240661C CN 01103149 CN01103149A CN1240661C CN 1240661 C CN1240661 C CN 1240661C CN 01103149 CN01103149 CN 01103149 CN 01103149 A CN01103149 A CN 01103149A CN 1240661 C CN1240661 C CN 1240661C
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- biacetate
- step process
- solvent
- reaction
- acetic acid
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Abstract
The present invention relates to a one-step method for synthesizing sodium biacetate. Glacial acetic acid and sodium carbonate are used as raw materials, and a one-step synthesis method is used. The one-step method is characterized in that any solvent is not added to synthesis reaction; the reaction temperature is controlled at 130+/-5 DEG C; constant-temperature reflux is kept for 30 to 40 minutes. The one-step method obviously reduces the production cost, shortens the reaction time, and reduces the processing steps. The product quality reaches a food grade standard.
Description
Technical field: the present invention relates to a kind of chemical synthesis process of fine chemical product, particularly a kind of one-step process for preparing sodium biacetate.
Background technology: sodium Diacetate is widely used for the anti-corrosive fresh-keeping of grain, food, feed.At present, the production method of sodium Diacetate is divided into 5 kinds by the raw material difference that adopts: (1) acetate---sodium acetate method: wherein be divided into vapor phase process again and be the liquid phase method of solvent with ethanol, this method complex process, production cost height; (2) diacetyl oxide---sodium acetate method: acid anhydrides cost height, long reaction time is difficult to industrialization; (3) acetate---diacetyl oxide---sodium carbonate method: the cost of material height, operate waywardly, be difficult to form scale production; (4) acetate---soda processes: though raw material is cheap, long reaction time, impurity are many, difficult quality guarantee; (5) acetate---soda ash method: be divided into again that ethanol is made solvent and, in recent years, realize that the producer of suitability for industrialized production adopts this method more with water as solvent two classes, this method raw material is cheap, be easy to get, and technology is simpler, but material fluidity is poor, influence operation, quality product are stable inadequately.
Summary of the invention: the purpose of this invention is to provide and a kind ofly need not add any solvent, is raw material with acetate and soda ash, the method for one-step synthesis sodium Diacetate.
The present invention realizes by following scheme:
One-step process for preparing sodium biacetate is a raw material with Glacial acetic acid and soda ash, adopts one-step synthesis, it is characterized in that building-up reactions does not add any solvent, and temperature of reaction is controlled at 130 ± 5 ℃, constant temperature backflow 30-45 minute.
The present invention adopts acetate---soda ash method one-step synthesis sodium Diacetate, in existing five kinds of synthesis methods, the production cost of this method is minimum, and the present invention on this basis, do not add any solvent, realize the one-step synthesis of sodium Diacetate, reduced production cost significantly, simultaneously, omitted solid-liquid separating equipment, reduce the investment and the energy consumption of separating device, in addition, carry out owing to be reflected at homogeneous phase, shortened the reaction times greatly, generally just can finish in 1 hour, productive rate reaches more than 95%, has improved production efficiency, owing to reduced reactions steps, quality product is controlled easily, and through Ningxia food quality supervision check, quality reaches the standard of state food level (FAD/WHO).
Embodiment: embodiment:
Building-up reactions of the present invention is carried out in the common response still, drop into Glacial acetic acid earlier, heat up, substep drops into soda ash, the stirring and refluxing reaction, when temperature reaches 130 ± 5 ℃, reaction solution is emitted in constant temperature backflow 30-45 minute while hot, generates white fine crystals at once, draw to loose, airing or oven dry, obtain product.
Claims (1)
1. one-step process for preparing sodium biacetate is a raw material with Glacial acetic acid and soda ash, adopts one-step synthesis, it is characterized in that building-up reactions does not add any solvent, drop into Glacial acetic acid earlier, heat up, substep drops into soda ash, the stirring and refluxing reaction, when temperature reaches 130 ± 5 ℃, constant temperature backflow 30-45 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01103149 CN1240661C (en) | 2001-02-16 | 2001-02-16 | One-step process for preparing sodium biacetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01103149 CN1240661C (en) | 2001-02-16 | 2001-02-16 | One-step process for preparing sodium biacetate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1369472A CN1369472A (en) | 2002-09-18 |
| CN1240661C true CN1240661C (en) | 2006-02-08 |
Family
ID=4653142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01103149 Expired - Fee Related CN1240661C (en) | 2001-02-16 | 2001-02-16 | One-step process for preparing sodium biacetate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1240661C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364951C (en) * | 2005-11-24 | 2008-01-30 | 湖南株洲化工集团有限责任公司 | Sodium Diacetate production method |
| CN104774144A (en) * | 2014-01-10 | 2015-07-15 | 江苏省勤奋药业有限公司 | Hemodialysis medicinal component sodium diacetate preparation method |
| CN106365982A (en) * | 2016-08-26 | 2017-02-01 | 南通奥凯生物技术开发有限公司 | Method for preparing pharmaceutical grade sodium diacetate |
| CN110229060B (en) * | 2019-06-26 | 2022-02-08 | 连云港树人科创食品添加剂有限公司 | Preparation method of food-grade sodium diacetate |
-
2001
- 2001-02-16 CN CN 01103149 patent/CN1240661C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1369472A (en) | 2002-09-18 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |