CN1597699A - Production method of sodium carboxy methy starch - Google Patents
Production method of sodium carboxy methy starch Download PDFInfo
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- CN1597699A CN1597699A CN 200410024538 CN200410024538A CN1597699A CN 1597699 A CN1597699 A CN 1597699A CN 200410024538 CN200410024538 CN 200410024538 CN 200410024538 A CN200410024538 A CN 200410024538A CN 1597699 A CN1597699 A CN 1597699A
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- starch
- acetic acid
- mono chloro
- chloro acetic
- ethanolic soln
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Abstract
A process for preparing carboxymethyl starch soduim includes such steps as dissolving chloroacetic acid in alcohol to obtain solution A, adding part of solution A to starch, stirring to obtain paste, mixing it with part of solution A and the aqueous solution of sodium hydroxide, processing to obtain etherification liquid, mixing it with the rest of solution A, processing, and pulverizing.
Description
Technical field:
The present invention relates to the production method that a kind of carboxymethyl starch is received, belong to the field of biochemical industry.
Technical background:
Carboxymethyl starch is received (Sodium Corboxymethyl Starch, be called for short CMS) be the carboxymethyl radical derivative of starch, be one of principal item of modified starch, it is a kind of polymer electrolyte that directly is dissolved in cold water, be white or pale yellow powder, nonpoisonous and tasteless, its aqueous solution is sticking shape, transparent liquid, mobile, solvability is good, be a kind of novel thickening material, stablizer, foodstuff additive, medicinal disintegrating agent, it has higher viscosity, bigger clinging power, emulsifying property, stability and perviousness preferably, difficult corruption is gone mouldy.Fields such as weaving, papermaking, oil, building materials, food, medicine and daily chemical industry have been widely used in.
The manufacture method that common carboxymethyl starch is received is divided into dry method and two kinds of technologies of wet method.Dry method need not filtered, but carboxymethylation reaction is inhomogeneous, and substitution value is low, poorly water-soluble; Wet production is to be medium with organic solvent, and the organic solvent consumption is very big, causes product cost to improve.
Summary of the invention:
The objective of the invention is to overcome the shortcoming that two kinds of methods of dry method and wet method exist in the above-mentioned prior art, and propose the method that a kind of new manufacturing carboxymethyl starch is received.It has reasonable, the advantages such as technology is simple, with low cost, good quality of product of prescription.
Method of the present invention is the advantage of two kinds of starch conversion dry method and wet methods in the comprehensive prior art, adopts three-step approach, proposes the method that a kind of new manufacturing carboxymethyl starch is received.Its technical scheme is:
At first, choose required main raw material:
Starch, ethanol, Mono Chloro Acetic Acid, sodium hydroxid, deionized water;
Production method step of the present invention is as follows:
The first step: Mono Chloro Acetic Acid is dissolved in to be made into concentration in the ethanol be 80% Mono Chloro Acetic Acid ethanolic soln, this solution is added in the starch, stir into pasty liquid, wherein the weight proportion of starch and 80% Mono Chloro Acetic Acid ethanolic soln is 1: 0.1～1;
Second step: the sodium hydroxid aqueous solution of 80% Mono Chloro Acetic Acid ethanolic soln and 40% is added in the above pasty liquid stirs again, be warming up to 60～80 ℃ then, reacted 0.5～1 hour, obtain preliminary ether-based liquid, wherein, starch: 80% Mono Chloro Acetic Acid ethanolic soln: the weight proportion of 40% the sodium hydroxid aqueous solution is 1: 0.1～0.6: 0.1～0.6;
The 3rd step: remaining 80% Mono Chloro Acetic Acid ethanolic soln is added in the above-mentioned preliminary ether-based liquid, keeps 60～80 ℃, reacted 2-3 hour, PH is 6.5-7.5 with the hydrochloric acid of concentration 25-36% accent, centrifugation then, with the washing with alcohol filter cake to there not being Cl
-,, pulverize and promptly get product dry again 2-3 hour of filter cake.
Manufacture method provided by the invention is compared with wet method with dry method of the prior art, the product substitution value can reach more than 1.0, stick with paste more than the fluid viscosity 6000mpa.s, compare with wet method, organic solvent reduces 70%-80%, Mono Chloro Acetic Acid reduces 20%-30%, and product viscosity improves 2-3 doubly, and substitution value improves 2-3 doubly.This method has prescription rationally, advantages such as technology is simple, with low cost, good quality of product.
Embodiment
Execute example 1: the production method that a kind of carboxymethyl starch is received the steps include:
The first step: Mono Chloro Acetic Acid is dissolved in is made into totally 37 milliliters of 80% concentration in the ethanol, get 12 milliliters of this solution and be added in the 100 gram starch, stir into pasty liquid;
Second step: the sodium hydroxid aqueous solution of 15 milliliters of 80% Mono Chloro Acetic Acid ethanolic solns and 40% is added in the above pasty liquid for 20 milliliters stirs again, be warming up to 60 ℃ then, reacted 30 minutes, obtain preliminary ether-based liquid;
The 3rd step: 10 milliliters of remaining 80% Mono Chloro Acetic Acid ethanolic solns being added in the above-mentioned preliminary ether-based liquid, keeping 70 ℃, reacted 2 hours, is 7 with concentration 25% hydrochloric acid accent PH, centrifugation then, with the washing with alcohol filter cake to there not being Cl
-,, pulverize and promptly get product dry again 2 hours of filter cake.
Embodiment 2: the production method that a kind of carboxymethyl starch is received the steps include:
The first step: Mono Chloro Acetic Acid is dissolved in is made into 80% concentration in the ethanol, totally 40 milliliters, get 20 milliliters of this solution and be added in the 100 gram starch, stir into pasty liquid;
Second step: the sodium hydroxid aqueous solution of 10 milliliters of 80% Mono Chloro Acetic Acid ethanolic solns and 40% is added in the above pasty liquid for 30 milliliters stirs again, be warming up to 65 ℃ then, reacted 1 hour, obtain preliminary ether-based liquid;
The 3rd step: 10 milliliters of remaining 80% Mono Chloro Acetic Acid ethanolic solns being added in the above-mentioned preliminary ether-based liquid, keeping 75 ℃, reacted 3 hours, is 6.8 with concentration 20% hydrochloric acid accent PH, centrifugation then, with the washing with alcohol filter cake to there not being Cl
-,, pulverize and promptly get product dry again 3 hours of filter cake.
Claims (1)
- The production method that a kind of carboxymethyl starch is received is characterized in that:Choosing required main raw material is: starch, ethanol, Mono Chloro Acetic Acid, sodium hydroxid, deionized water;Its production method step is as follows:The first step: Mono Chloro Acetic Acid is dissolved in to be made into concentration in the ethanol be 80% Mono Chloro Acetic Acid ethanolic soln, this solution is added in the starch, stir into pasty liquid, wherein the weight proportion of starch and 80% Mono Chloro Acetic Acid ethanolic soln is 1: 0.1～1;Second step: the sodium hydroxid aqueous solution of 80% Mono Chloro Acetic Acid ethanolic soln and 40% is added in the above pasty liquid stirs again, be warming up to 60～80 ℃ then, reacted 0.5～1 hour, obtain preliminary ether-based liquid, wherein, starch: 80% Mono Chloro Acetic Acid ethanolic soln: the weight proportion of 40% the sodium hydroxid aqueous solution is 1: 0.1～0.6: 0.1～0.6;The 3rd step: remaining 80% Mono Chloro Acetic Acid ethanolic soln is added in the above-mentioned preliminary ether-based liquid, keeps 60～80 ℃, reacted 2-3 hour, PH is 6.5-7.5 with the hydrochloric acid of concentration 25-36% accent, centrifugation then, with the washing with alcohol filter cake to there not being Cl -,, pulverize and promptly get product dry again 2-3 hour of filter cake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024538 CN1274718C (en) | 2004-08-06 | 2004-08-06 | Production method of sodium carboxy methy starch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024538 CN1274718C (en) | 2004-08-06 | 2004-08-06 | Production method of sodium carboxy methy starch |
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| Publication Number | Publication Date |
|---|---|
| CN1597699A true CN1597699A (en) | 2005-03-23 |
| CN1274718C CN1274718C (en) | 2006-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410024538 Expired - Fee Related CN1274718C (en) | 2004-08-06 | 2004-08-06 | Production method of sodium carboxy methy starch |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161684B (en) * | 2007-11-23 | 2010-05-19 | 华南理工大学 | Infra-red synthesis of crosslinked carboxymethyl fecula |
| CN101603772B (en) * | 2009-06-11 | 2011-02-16 | 山东省科学院生物研究所 | Technology and equipment for product drying and solvent recovery |
| CN102153664A (en) * | 2011-01-17 | 2011-08-17 | 温州大学 | Method for preparing nanometer lamellar sodium carboxymethyl starch |
| CN103254449A (en) * | 2012-12-25 | 2013-08-21 | 广西恒优淀粉有限责任公司 | Acetate starch preparation method |
| CN103450364A (en) * | 2013-09-03 | 2013-12-18 | 华中农业大学 | High-substitution-degree carboxymethyl starch and composite hydrogel thereof, and preparation method and application of carboxymethyl starch and composite hydrogel thereof |
| CN104017094A (en) * | 2014-06-20 | 2014-09-03 | 湘潭大学 | Method for preparing carboxymethyl rice starch by virtue of continuous supplementing method |
| CN104311682A (en) * | 2014-11-04 | 2015-01-28 | 东莞东美食品有限公司 | Preparation method of medicinal carboxymethyl starch |
-
2004
- 2004-08-06 CN CN 200410024538 patent/CN1274718C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161684B (en) * | 2007-11-23 | 2010-05-19 | 华南理工大学 | Infra-red synthesis of crosslinked carboxymethyl fecula |
| CN101603772B (en) * | 2009-06-11 | 2011-02-16 | 山东省科学院生物研究所 | Technology and equipment for product drying and solvent recovery |
| CN102153664A (en) * | 2011-01-17 | 2011-08-17 | 温州大学 | Method for preparing nanometer lamellar sodium carboxymethyl starch |
| CN102153664B (en) * | 2011-01-17 | 2013-11-06 | 温州大学 | Method for preparing nanometer lamellar sodium carboxymethyl starch |
| CN103254449A (en) * | 2012-12-25 | 2013-08-21 | 广西恒优淀粉有限责任公司 | Acetate starch preparation method |
| CN103450364A (en) * | 2013-09-03 | 2013-12-18 | 华中农业大学 | High-substitution-degree carboxymethyl starch and composite hydrogel thereof, and preparation method and application of carboxymethyl starch and composite hydrogel thereof |
| CN103450364B (en) * | 2013-09-03 | 2016-03-16 | 华中农业大学 | Carboxymethyl starch with high substitution degree and composite aquogel, preparation method and application |
| CN104017094A (en) * | 2014-06-20 | 2014-09-03 | 湘潭大学 | Method for preparing carboxymethyl rice starch by virtue of continuous supplementing method |
| CN104311682A (en) * | 2014-11-04 | 2015-01-28 | 东莞东美食品有限公司 | Preparation method of medicinal carboxymethyl starch |
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| Publication number | Publication date |
|---|---|
| CN1274718C (en) | 2006-09-13 |
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Granted publication date: 20060913 Termination date: 20130806 |