CN102219910A - Novel technology of novel cellulose dissolving - Google Patents
Novel technology of novel cellulose dissolving Download PDFInfo
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- CN102219910A CN102219910A CN 201010146800 CN201010146800A CN102219910A CN 102219910 A CN102219910 A CN 102219910A CN 201010146800 CN201010146800 CN 201010146800 CN 201010146800 A CN201010146800 A CN 201010146800A CN 102219910 A CN102219910 A CN 102219910A
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- cellulose
- water
- catalyst
- solution
- cosolvent
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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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- Processes Of Treating Macromolecular Substances (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention is a novel technology of cellulose dissolving. The cellulose is dissolved by using a solid cosolvent (catalyst) insoluble in water and a sodium hydroxide water solution with different techniques at low temperature and normal temperature. The solid cosolvent (catalyst) insoluble in water can be the macromolecular compound with epoxide group, the macromolecular polymer with amide group, or the mixture of the materials. Different cosolvents (catalysts) and different amounts thereof make different solubilities of the cellulose in the sodium hydroxide water solution and different temperatures for dissolving. The cosolvent (catalyst) and the solution can be separated by simply filtering because the cosolvent (catalyst) is insoluble in water. Only one compound solution can be generated after subjecting coagulation bath to the cellulose solution and is easily recycled. In addition, the invention does not have the problem that the existence of the cosolvent (catalyst) is bad for cellulose regeneration.
Description
Technical field:
Mierocrystalline cellulose is inexhaustible Biological resources, is important chemical material, has biodegradability, belongs to environment-friendly material.The every field that is widely used in industry and agricultural, the present invention is a kind of cellulose dissolution technology of novel environmental protection.
Background technology:
Known in the world have a lot of cellulosic dissolving technologies, they or seriously polluted, or cost an arm and a leg, or the processing condition harshness, or waste liquid reclaims difficulty.The present invention is to be the dissolution with solvents Mierocrystalline cellulose with the aqueous sodium hydroxide solution, low price, and to adopt with the aqueous sodium hydroxide solution equally with other be that the cellulosic technology of dissolution with solvents is compared, waste liquid is single compound solution, reclaims to be very easy to.
Summary of the invention:
The present invention is a kind of novel cellulose dissolution new technology, with the solubility promoter (catalyzer) of water-insoluble solid, makes Mierocrystalline cellulose can be dissolved in aqueous sodium hydroxide solution by different technology with aqueous sodium hydroxide solution under low temperature and normal temperature.With water-fast macromolecular compound or polymkeric substance or mixture solid as solubility promoter (catalyzer), they can be the organic high molecular compound that has epoxide group (as various be the solid of major ingredient with Resins, epoxy), can be have amide group high molecular polymer (as various nylon solids, the urea-formaldehyde resin solid, crosslinked pyrrolidone solid), also can be the mixture of above-mentioned substance.Different solubility promoter (catalyzer) and different amounts thereof make the solubleness of Mierocrystalline cellulose in sodium hydroxide solution, dissolve temperature required condition difference to some extent.Because solubility promoter (catalyzer) is water insoluble, so simple filtering just can be with solubility promoter (catalyzer) and solution separating.After the cellulose solution process precipitation bath (sulphuric acid soln), can only produce a kind of compound solution (as sodium sulfate), reclaim and become very easy as 5%.
In addition, the existence of solubility promoter (catalyzer) is to be unfavorable for cellulosic regenerated, can influence cellulosic solidifying, and there is not this problem in the present invention.
Description of drawings:
Do not have.
Embodiment:
Because the spendable solubility promoter of the present invention (catalyzer) is very many, can only lift two example explanations:
1) adding 8-16wt% nylon solid is put into refrigerator together and is chilled to-4 ℃ in advance to-10 ℃ of taking-ups in the 4-12wt% sodium hydroxide solution, adds the Mierocrystalline cellulose of 2-8wt%, stirs the cellulose solution that gets final product transparently rapidly.
2) in the 3-10wt% sodium hydroxide solution, add 20-40wt% Resins, epoxy solid, add the Mierocrystalline cellulose of 2-8wt%, stir the cellulose solution that gets final product transparently rapidly.This dissolution process is finished at normal temperatures.
Claims (3)
1. novel cellulose dissolution new technology is characterized in that: can both make cellulose dissolution in aqueous sodium hydroxide solution by different technology with water-insoluble solid solubility promoter (catalyzer) and aqueous sodium hydroxide solution under low temperature and normal temperature.
2. cellulose dissolution new technology according to claim 1 is characterized in that: the solubility promoter that is adopted (catalyzer) is compound or the polymkeric substance or the mixture of water-insoluble solid.
3. cellulose dissolution new technology according to claim 1 is characterized in that: the solubility promoter that is adopted (catalyzer) is water-fast macromolecular compound or polymkeric substance or the mixture that contains epoxide group or amide group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146800 CN102219910A (en) | 2010-04-15 | 2010-04-15 | Novel technology of novel cellulose dissolving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146800 CN102219910A (en) | 2010-04-15 | 2010-04-15 | Novel technology of novel cellulose dissolving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102219910A true CN102219910A (en) | 2011-10-19 |
Family
ID=44776632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010146800 Pending CN102219910A (en) | 2010-04-15 | 2010-04-15 | Novel technology of novel cellulose dissolving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102219910A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397369A (en) * | 2008-09-26 | 2009-04-01 | 中国科学技术大学 | Water-based solvent system of cellulose and corresponding method for dissolving cellulose |
| EP2116557A1 (en) * | 2008-05-06 | 2009-11-11 | Tampereen teknillinen yliopisto | A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose |
-
2010
- 2010-04-15 CN CN 201010146800 patent/CN102219910A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2116557A1 (en) * | 2008-05-06 | 2009-11-11 | Tampereen teknillinen yliopisto | A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose |
| CN101397369A (en) * | 2008-09-26 | 2009-04-01 | 中国科学技术大学 | Water-based solvent system of cellulose and corresponding method for dissolving cellulose |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111019 |