CN106349052B - A kind of preparation method of sodium acetate - Google Patents
A kind of preparation method of sodium acetate Download PDFInfo
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- CN106349052B CN106349052B CN201610630562.3A CN201610630562A CN106349052B CN 106349052 B CN106349052 B CN 106349052B CN 201610630562 A CN201610630562 A CN 201610630562A CN 106349052 B CN106349052 B CN 106349052B
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- sodium acetate
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/41—Preparation of salts of carboxylic acids
- C07C51/412—Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part
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- 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
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- 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
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of preparation methods of sodium acetate, include the following steps：Acid-base neutralization reaction；Filtering：Reaction solution is imported into filter, three layer filtration film is arranged in filter interior；Crystallization：Reaction solution is imported from filter in crystallization kettle and is crystallized；It filters and dry：Crystallization material is put into while stirring and filters pond, until draining mother liquor；Will treated mother liquor through centrifuge dewatering, be packed into drying in oven afterwards, after dry materials, open oven door, cool down half an hour with wind turbine exhausting, start to discharge.The advantage of the invention is that：Using neutralization reaction step is more refined, activated carbon press filtration step is replaced by the way of filtration module, product appearance obtained is pure whiter, and purity is high, stay in grade.
Description
Technical field
The present invention relates to a kind of food additives field, more particularly to a kind of preparation method of sodium acetate.
Background technology
Sodium acetate, also known as sodium acetate, anhydrous sodium acetate molecular formula CH3COONa, write a Chinese character in simplified form NaAc, are the crystallization of colorless and odorless
Body, it is nontoxic, there is hygroscopicity, is exposed in humid air and easily deliquesces, the easy-weathering in dry air, white powder after weathering,
It is flammable.Sodium acetate trihydrate is soluble easily in water and ether, is slightly soluble in ethyl alcohol.Aqueous solution is in alkalescent.The density of Sodium acetate trihydrate is
1450kg/m3,58 DEG C of fusing point, 607.2 DEG C of self-ignition point slough 3 molecular waters when 123 DEG C.The density of anhydrous sodium acetate is
1528kg/m3,324 DEG C of fusing point.Sodium acetate be used as organic synthesis esterifying agent and photography, drug, medicine, printing and dyeing mordant,
The various aspects such as buffer, chemical reagent, meat anticorrosion, pigment, tanning.It can be used for producing various chemical products, such as furans propylene
Acid, acetate and monoxone etc..Buffer of the product as seasoning can mitigate bad smell and prevent from changing colour, and have certain
Mildew-proof function.Also it can be used as the acid of tartar sauce, sauerkraut, mayonnaise, breaded fish stick, sausage, bread, viscous cake etc..With methyl fibre
The mixing such as element, phosphate are tieed up, the keeping quality for improving sausage, bread, viscous cake etc.；With certain market potential.
Invention content
The technical problem to be solved in the present invention is to provide a kind of preparation methods of the high sodium acetate of purity.
In order to solve the above technical problems, the technical scheme is that：A kind of preparation method of sodium acetate, innovative point exist
In：Include the following steps：
（1）Acid-base neutralization reaction：Enough distilled water is put into reaction kettle in advance and is stirred, starts steam jacket in kettle
Distilled water is preheated；Steam off chuck puts into acetic acid and sodium hydroxide successively；Reopen steam jacket so that in kettle
Temperature increases and is maintained at 75-80 DEG C；It measures pH value and reaches 4.5 ~ 5.0, operate steam jacket, temperature in the kettle is made to heat up and keep
At 80-85 DEG C, 25min is kept；
（2）Filtering：Reaction solution is imported into fillter section, in fillter section reaction solution need to pass through three layer filtration film, including according to
Two layers of the poly (ether-sulfone) ultrafiltration membrane and layer of ceramic film of secondary setting；Reaction solution passes sequentially through filter membrane under the action of pressure difference；
（3）Crystallizing and drying：Reaction solution is come out simultaneously crystallizing and drying from filter, starts to discharge.
Further, the step（1）It is middle using a concentration of 40% sodium hydroxide solution, the acetic acid and sodium hydroxide
Mass ratio ranging from 6:5~2:1.
Further, the step（2）In every layer of filter membrane be all independently mounted on a filter, fillter section have
There are three the filters being arranged in series.
Further, the step（1）In, when reaction kettle is kept the temperature at 80-85 DEG C, opens and detect PH inside reaction kettle
Value 2 ~ 3 times, and it is 4.5 ~ 5 to keep PH.
The advantage of the invention is that：
Using neutralization reaction step is more refined, activated carbon press filtration step is replaced by the way of filtration module, is made
Product appearance it is pure whiter, purity is high, stay in grade.
Specific implementation mode
The invention discloses a kind of preparation methods of sodium acetate, include the following steps：
（1）Acid-base neutralization reaction：Enough distilled water is put into reaction kettle in advance and is stirred, starts steam jacket in kettle
Distilled water is preheated；Steam off chuck puts into acetic acid and sodium hydroxide, using a concentration of 40% liquid caustic soda solution, second successively
Acid and the mass ratio of liquid caustic soda between the two ranging from 6:5~2:1, to ensure acetic acid, the reaction was complete substantially；Reopen steam folder
Set so that temperature in the kettle increases and is maintained at 75-80 DEG C；It measures pH value and reaches 4.5 ~ 5.0, operate steam jacket, make warm in kettle
Degree heats up and is maintained at 80-85 DEG C, holding 25min；
（2）Filtering：Reaction solution is imported into filter, three layer filtration film, including two strata ether sulfones is arranged in filter interior
Class ultrafiltration membrane and layer of ceramic film, the effect of ultrafiltration membrane are by diameter in reaction solution more than 0.01 μm of colloid, protein, micro-
Biology and larger molecular organics, purify reaction solution, and ceramic membrane can be divided into micro-filtration according to aperture（Aperture is more than 50nm）, ultrafiltration
（2 ~ 50nm of aperture）, nanofiltration（Aperture is less than 2nm）Etc. types, nanofiltration ceramic membrane is mainly used in this technique, when being detached,
Under the action of external force, small-molecule substance penetrates film, and macromolecular substances are rejected by, to reach separation, concentration, purifying, impurity elimination,
The purpose of degerming.Two layers of ultrafiltration membrane, layer of ceramic film are passed sequentially through under the action of pressure difference；Raw material sodium hydroxide impurity component table
It is as follows：
By three layer filtration film process, the basic impurity removed in sodium hydroxide, purified product.
（3）Crystallization：Reaction solution is imported from filter in crystallization kettle, first heap reaction solution is pre-chilled, right after precooling
Reaction solution cools down, and when material temperature in kettle to be crystallized is reduced to 18 DEG C or less, starts to pay attention to observation crystallization situation, such as
It at thick shape, then is regarded as terminating, prepares blowing；
（4）It filters：Crystallization kettle bottom valve is opened, crystallization material is put into filters pond while stirring, opened vacuum pump, buffering
Slot discharge outlet sucts rubber bumper, checks whether vacuum degree rises, and filter tank vacuum valve is opened, until draining mother liquor；
（5）It is dry：Will treated mother liquor through centrifuge dewatering, be packed into drying in oven afterwards, oven temperature is maintained at 85-
90 DEG C, drying time is 18-24 hours general, after dry materials, opens oven door, cools down half an hour with wind turbine exhausting, starts
Material.
The basic principles and main features of the present invention have been shown and described above.It should be understood by those skilled in the art that
The present invention is not limited to the above embodiments, and the above embodiments and description only illustrate the principle of the present invention,
Without departing from the spirit and scope, various changes and improvements may be made to the invention, these changes and improvements are all fallen
Enter in scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (1)
1. a kind of preparation method of sodium acetate, it is characterised in that：Include the following steps：
（1）Acid-base neutralization reaction：Enough distilled water is put into reaction kettle in advance and is stirred, starts steam jacket to being distilled in kettle
Water is preheated；Steam off chuck puts into acetic acid and sodium hydroxide successively；Reopen steam jacket so that temperature in the kettle
It increases and is maintained at 75-80 DEG C；It measures pH value and reaches 4.5 ~ 5.0, operate steam jacket, temperature in the kettle is made to heat up and be maintained at
80-85 DEG C, keep 25min；
（2）Filtering：Reaction solution is imported into fillter section, reaction solution need to pass through three layer filtration film in fillter section, including set successively
Two layers of the poly (ether-sulfone) ultrafiltration membrane and layer of ceramic film set；Reaction solution passes sequentially through filter membrane under the action of pressure difference；
（3）Crystallizing and drying：Reaction solution is come out simultaneously crystallizing and drying from filter, starts to discharge；
The step（1）It is middle using a concentration of 40% sodium hydroxide solution, the mass ratio of the acetic acid and sodium hydroxide is ranging from
6:5~2:1；
The step（2）In every layer of filter membrane be all independently mounted on a filter, fillter section tool there are three series connection set
The filter set；
The step（1）In, when reaction kettle is kept the temperature at 80-85 DEG C, opens and detect pH value 2 ~ 3 times inside reaction kettle, and protect
It is 4.5 ~ 5 to hold PH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630562.3A CN106349052B (en) | 2016-08-04 | 2016-08-04 | A kind of preparation method of sodium acetate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630562.3A CN106349052B (en) | 2016-08-04 | 2016-08-04 | A kind of preparation method of sodium acetate |
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| Publication Number | Publication Date |
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| CN106349052A CN106349052A (en) | 2017-01-25 |
| CN106349052B true CN106349052B (en) | 2018-11-09 |
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| CN201610630562.3A Active CN106349052B (en) | 2016-08-04 | 2016-08-04 | A kind of preparation method of sodium acetate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019061213A1 (en) * | 2017-09-29 | 2019-04-04 | 南通奥凯生物技术开发有限公司 | Method for preparing sodium acetate |
| CN109879749A (en) * | 2019-01-21 | 2019-06-14 | 浙江一树环保科技有限公司 | A kind of industrial production process of the sodium acetate solution for sewage treatment |
| CN109503359A (en) * | 2019-01-21 | 2019-03-22 | 浙江树环保科技有限公司 | A kind of industrial production process of sodium acetate solution |
| CN112174804A (en) * | 2020-10-27 | 2021-01-05 | 苏州凯乐希生态环境科技有限公司 | Industrial preparation method of sodium acetate solution for sewage treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139280A (en) * | 2007-10-11 | 2008-03-12 | 宋桂兰 | Sodium acetate anhydrous and preparation method and usage thereof |
| CN102351679A (en) * | 2011-10-10 | 2012-02-15 | 东营金明工贸有限公司 | Method for producing crystalline sodium acetate with one-step method |
-
2016
- 2016-08-04 CN CN201610630562.3A patent/CN106349052B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139280A (en) * | 2007-10-11 | 2008-03-12 | 宋桂兰 | Sodium acetate anhydrous and preparation method and usage thereof |
| CN102351679A (en) * | 2011-10-10 | 2012-02-15 | 东营金明工贸有限公司 | Method for producing crystalline sodium acetate with one-step method |
Non-Patent Citations (1)
| Title |
|---|
| 超滤膜材料及发展趋势;王姣等;《化学工程与装备》;20080930(第9期);123-124 * |
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| CN106349052A (en) | 2017-01-25 |
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