CN101434658A - Method for producing carboxymethyl cellulose from cotton stem - Google Patents
Method for producing carboxymethyl cellulose from cotton stem Download PDFInfo
- Publication number
- CN101434658A CN101434658A CNA2007101145154A CN200710114515A CN101434658A CN 101434658 A CN101434658 A CN 101434658A CN A2007101145154 A CNA2007101145154 A CN A2007101145154A CN 200710114515 A CN200710114515 A CN 200710114515A CN 101434658 A CN101434658 A CN 101434658A
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- CN
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- Prior art keywords
- carboxymethyl cellulose
- etherificate
- cotton stem
- alkalization
- production method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention relates to carboxymethyl cellulose obtained from cotton stems. The viscidity of 2 percent solution is 400MPa.s to 600 MPa.s. The cotton stems are taken as a reference and the product yield is over 85 percent. The appearance of a product is white powder, with the viscidity (in 2 percent solution) of 400MPa.s to 600 MPa.s, pH value of 7.0 to 8.0 and water content of lower than 5 percent.
Description
Technical field
The present invention relates to chemical field, particularly use the production method of carboxymethyl cellulose from cotton stem.
Background technology
Carboxymethyl cellulose is widely used as food thickener, mud stablizer, tablet disintegrant, the anti-heavy again agent of washing powder, printing gum, paper making additive, ceramic binder etc.The raw material of producing carboxymethyl cellulose is the material of various cellulose, and according to the difference of reaction media, the production method of carboxymethyl cellulose can be divided into two big classes, promptly is the hydrophily method of reaction medium with water and is the solvent method of reaction medium with the organic solvent.The present invention adopts the cotton stalk to make raw material, utilizes ethanol to prepare carboxymethyl cellulose as dispersion agent, and sufficient raw is with low cost.
Summary of the invention
Raw material and main agents raw material: dried cotton stalk requires clean inclusion-free.Main agents: sodium hydroxide, Mono Chloro Acetic Acid, ethanol, hydrogen peroxide, clorox.Technical process: the processing of raw material--alkalization--etherificate--washing, drying--waste water utilization.
The present invention seeks to utilize the obtained carboxymethyl cellulose of cotton stalk, the viscosity of 2% solution is 400-600MPas, is benchmark with the cotton stalk, and product yield is more than 85%.
Technique effect
The product appearance that the present invention makes is a white powder, viscosity (2% solution) 400-600MPas, and sodium chloride content is less than 3%, and pH value is 7.0-8.0, and water-content is less than 5%.
Embodiment:
1, the processing of raw material: select the cotton stalk that does not go mouldy, clean and dry, pulverize with pulverizer.At 100 ℃ of left and right sides prehydrolysis 1-2h, carry out alkaline boiling, the concentration 10%-20% of alkali, cooking time 3-5h in 100 ℃ then.Clorox and hydrogen peroxide are mixed by a certain percentage, and impouring is immediately controlled pH value 8-10 with in the slurry of aqueous suspension, 35-40 ℃ of temperature, bleaching time 35-40min is with dilute hydrochloric acid acidifying 10min, the water thorough washing dries to neutral, promptly makes required Mierocrystalline cellulose.
2, alkalization: the Mierocrystalline cellulose that makes is put into kneader, add a certain amount of 20% sodium hydroxide, add 95% an amount of ethanol simultaneously.During beginning, kneader chuck water flowing cooling after alkali lye adds, feeds hot water control alkalization temperature and is 35-40 ℃, alkalization time 2.5h.
3, etherificate: after quaternization is finished, add saturated Mono Chloro Acetic Acid ethanolic soln in proportion.Etherificate initial stage water flowing cooling changes logical hot water after etherifying agent adds, make 70 ℃ of the temperature maintenance of system, and about etherificate time 2h, the terminal point sample of taking a sample to check should be water-soluble, is transparence.
4, washing, drying: open kneader, take out the carboxymethyl cellulose crude product, add dilute hydrochloric acid and transfer to neutrality.With the washing of 70 ethanolic soln, use the whizzer dealcoholysis again, the carboxymethyl cellulose water ratio after the dealcoholysis is about 20%, must finished product after the drying.
5, waste water utilization: wash used waste ethanol, owing to contain salts substances, not directly recycle after each the using, must be purified in distillation.
Claims (3)
1, a kind of production method with carboxymethyl cellulose from cotton stem is characterized in that technical process: the processing of raw material, and----etherificate--washing, drying--waste water utilization alkalizes.
2, a kind of production method as claimed in claim 1 with carboxymethyl cellulose from cotton stem, it is characterized in that alkalization: the Mierocrystalline cellulose that makes is put into kneader, add a certain amount of 20% sodium hydroxide, add 95% an amount of ethanol simultaneously, during beginning, kneader chuck water flowing cooling is after alkali lye adds, feed hot water control alkalization temperature and be 35-40 ℃, alkalization time 2.5h.
3, a kind of production method as claimed in claim 1 with carboxymethyl cellulose from cotton stem, it is characterized in that etherificate: after quaternization is finished, add saturated Mono Chloro Acetic Acid ethanolic soln in proportion, the water flowing cooling of etherificate initial stage, change logical hot water after etherifying agent adds, make 70 ℃ of the temperature maintenance of system, about etherificate time 2h, taking a sample to check the terminal point sample should be water-soluble, is transparence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101145154A CN101434658A (en) | 2007-11-13 | 2007-11-13 | Method for producing carboxymethyl cellulose from cotton stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101145154A CN101434658A (en) | 2007-11-13 | 2007-11-13 | Method for producing carboxymethyl cellulose from cotton stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101434658A true CN101434658A (en) | 2009-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101145154A Pending CN101434658A (en) | 2007-11-13 | 2007-11-13 | Method for producing carboxymethyl cellulose from cotton stem |
Country Status (1)
| Country | Link |
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| CN (1) | CN101434658A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020718A (en) * | 2011-01-13 | 2011-04-20 | 宝鸡彩虹科技有限责任公司 | Production process of sodium carboxymethyl cellulose |
| CN105218686A (en) * | 2015-10-20 | 2016-01-06 | 湖州博仁纺织品有限公司 | A kind of preparation method of new reactive dyes stamp thickening material |
| CN105777912A (en) * | 2016-05-18 | 2016-07-20 | 河北茂源化工有限公司 | Preparation method and application of sodium carboxymethylcellulose thickening rheological agent for dry powder putty |
| CN107903327A (en) * | 2017-10-30 | 2018-04-13 | 山东金正新科农业发展有限公司 | The method that stalk cellulose component separates and prepares carboxymethyl cellulose |
| CN114478123A (en) * | 2022-02-24 | 2022-05-13 | 内蒙古科学技术研究院 | Degradable bioactive liquid mulching film and preparation method thereof |
-
2007
- 2007-11-13 CN CNA2007101145154A patent/CN101434658A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020718A (en) * | 2011-01-13 | 2011-04-20 | 宝鸡彩虹科技有限责任公司 | Production process of sodium carboxymethyl cellulose |
| CN105218686A (en) * | 2015-10-20 | 2016-01-06 | 湖州博仁纺织品有限公司 | A kind of preparation method of new reactive dyes stamp thickening material |
| CN105777912A (en) * | 2016-05-18 | 2016-07-20 | 河北茂源化工有限公司 | Preparation method and application of sodium carboxymethylcellulose thickening rheological agent for dry powder putty |
| CN105777912B (en) * | 2016-05-18 | 2018-02-23 | 河北茂源化工有限公司 | The preparation method and application of dry-powder putty sodium carboxymethylcellulose thickener rheology agent |
| CN107903327A (en) * | 2017-10-30 | 2018-04-13 | 山东金正新科农业发展有限公司 | The method that stalk cellulose component separates and prepares carboxymethyl cellulose |
| CN114478123A (en) * | 2022-02-24 | 2022-05-13 | 内蒙古科学技术研究院 | Degradable bioactive liquid mulching film and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090520 |