CN101215795B - Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass - Google Patents
Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass Download PDFInfo
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- CN101215795B CN101215795B CN2008100520142A CN200810052014A CN101215795B CN 101215795 B CN101215795 B CN 101215795B CN 2008100520142 A CN2008100520142 A CN 2008100520142A CN 200810052014 A CN200810052014 A CN 200810052014A CN 101215795 B CN101215795 B CN 101215795B
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- wheat straw
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- ethanol
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Abstract
The invention belongs to paper making field of ryegrass pulping, which particularly relates to a pulping process of ryegrass which utilizes sulphuric acid to catalyze alcohol. The process comprises adopting sulphuric acid to be acid catalyst, optimally preparing cooking liquor, utilizing optimum liquid ratio, reaction temperature and boiling time, and adopting optimum scouring process. The process improves the boiling efficiency, which overcomes the difficult problem of autocatalysis and alkaline alcoholic pulping. Thereby the invention can greatly improve economic benefits of alcohol method pulping paper making enterprises.
Description
Technical field
The invention belongs to the straw pulping paper-making field, particularly relate to the sulfuric acid catalysis ethanol pulping process of wheat straw.
Background technology
Wheat straw ethanol pulping technology is considered to one of cleaning pulping technology of tool potentiality.Because ethanol is because its resource is extensive, pollutional load of medicament own and toxicity are less, and have good active through the pretreated raw material substrate of Ethanol Method, enzyme hydrolysis efficient, thereby the extremely favor of organic solvent preconditioning technique research field.The Ethanol Method preliminary treatment can be divided into several classifications such as self-catalysis, base catalysis, acid catalysis.
Yet; When adopting self-catalysis or base catalysis, the pH value of cooking liquor is higher, can not effectively stop the stripping of institute's silicon oxide-containing in the fibrous raw material; Cause having the silicon interference problem in the subsequent treatment of pulping and digesting raffinate; And the energy utilization rate in the pulping process is low, and the recovery of chemicals is also relatively more difficult.
The objective of the invention is in order to solve the problems of the technologies described above.
Summary of the invention
In order further to develop wheat straw ethanol pulping technology and to overcome the difficult problem in self-catalysis, the base catalysis ethanol pulping technique, the invention provides the sulfuric acid catalysis ethanol pulping process of a kind of wheat straw.
The process technology scheme that the present invention is adopted for its technical problem of solution mainly comprises boiling and washing step:
1 boiling:
With the wheat straw sheet that is cut to about 30mm; After 14 mesh sieves screening back balance moisture is got the raw materials ready; Put into the boiling vessel boiling, the amount of alcohol of employing is an ethanol: water=40%～65% (percent by volume), liquor ratio are wheat straw raw material: liquid=1: 4～8 (kg/l); Add sulfuric acid in the boiling and make acid catalyst, the acid material is than being sulfuric acid: wheat straw=0.8～1.2% (percent by volume).170～205 ℃ of boiling temperatures, temperature retention time 45～75min fully dissolves wheat straw, obtains paper pulp.
2 washings:
Cleaning solution is the alcohol of 60%～70% (volume ratio) for the concentration by liquor ratio 1: 7～9 (volume ratio) preparation.The washing of employing normal temperature and pressure is washed with ethanol earlier, uses the clear water wash clean then.
Effect of the present invention: reduced reaction temperature and pressure, compared with autocatalytic method, the reflection temperature can descend 20～30 ℃, delignification doubles, and this method good to adaptability to raw material, shortened ethanol pulping boiling and slurry washing time greatly.
In order further to understand content of the present invention, characteristics, specify as follows:
Specific embodiment
1 boiling:
(testing used wheat straw, to take from Hebei electrodeless, stored three months for the wheat straw that will pass through gets the raw materials ready prepares.Get the raw materials ready and adopt the laboratory cutting grass knife to be cut to the blade about 30mm; Warp 14 mesh sieves screening back balance moisture) boiling in the boiling vessel of packing into; The amount of alcohol that adopts is an ethanol: water=40%～65% (percent by volume); Liquor ratio is a wheat straw raw material: liquid=1: 4～8 (kg/l), adding sulfuric acid in the boiling and make acid catalyst, the acid material is than being sulfuric acid: wheat straw=0.8～1.2% (percent by volume).170～205 ℃ of boiling temperatures, temperature retention time 45～75min fully dissolves wheat straw, obtains paper pulp.
2 washings:
Cleaning solution is the alcohol of 60%～70% (volume ratio) for the concentration by liquor ratio 1: 7～9 (volume ratio) preparation.The washing of employing normal temperature and pressure is washed with ethanol earlier, uses the clear water wash clean then.
Claims (1)
1. the sulfuric acid catalysis ethanol method pulping process of a wheat straw is with the wheat straw sheet that is cut to 30mm, after 14 mesh sieves screening back balance moisture is got the raw materials ready; Put into the boiling vessel boiling, cooking liquor is configured to ethanol: water=40%～65%, liquor ratio are wheat straw raw material: liquid=1: 4～8kg/l; Add sulfuric acid in the boiling and make acid catalyst; The acid material is than being sulfuric acid: wheat straw=0.8～1.2%, 170～205 ℃ of boiling temperatures, temperature retention time 45～75min; After accomplishing cooking process, with the cleaning solution washing, washing to the concentration by liquor ratio 1: 7～9 preparations is 60%～70% alcohol, and the normal temperature and pressure washing is adopted in washing, washes with ethanol earlier, uses the clear water wash clean then; Be the kg/l except that cooking liquor than unit in the above-mentioned pulping process, other proportionate relationship all is a volume ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100520142A CN101215795B (en) | 2008-01-09 | 2008-01-09 | Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100520142A CN101215795B (en) | 2008-01-09 | 2008-01-09 | Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101215795A CN101215795A (en) | 2008-07-09 |
| CN101215795B true CN101215795B (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100520142A Expired - Fee Related CN101215795B (en) | 2008-01-09 | 2008-01-09 | Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass |
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| CN (1) | CN101215795B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733223B (en) * | 2012-06-18 | 2015-03-18 | 中国科学院广州能源研究所 | Pulping method by catalysis of low boiling point solvent with diluted acid generated from xylose residue and furfural residue |
| CN108043124A (en) * | 2017-12-18 | 2018-05-18 | 安徽新立滤清器有限公司 | A kind of car air filtering core device wood-fibred filter core |
| CN109680532B (en) * | 2019-01-20 | 2021-12-10 | 王忠良 | Method for cooking and pulping vinasse ethanol by organic solvent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281074A (en) * | 1999-07-19 | 2001-01-24 | 西北轻工业学院 | Diwei self-catalyzing alcohol process for pulping |
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2008
- 2008-01-09 CN CN2008100520142A patent/CN101215795B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281074A (en) * | 1999-07-19 | 2001-01-24 | 西北轻工业学院 | Diwei self-catalyzing alcohol process for pulping |
Non-Patent Citations (1)
| Title |
|---|
| 张美云 等.非木材纤维自催化乙醇制浆的研究进展.《中华纸业》.2007,第28卷(第6期),77-79. * |
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| Publication number | Publication date |
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| CN101215795A (en) | 2008-07-09 |
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Addressee: Liu Zhong Document name: Notification of Publication of the Application for Invention |
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