CN100390353C - Environment protection pulping and papermaking method - Google Patents
Environment protection pulping and papermaking method Download PDFInfo
- Publication number
- CN100390353C CN100390353C CNB2005100227590A CN200510022759A CN100390353C CN 100390353 C CN100390353 C CN 100390353C CN B2005100227590 A CNB2005100227590 A CN B2005100227590A CN 200510022759 A CN200510022759 A CN 200510022759A CN 100390353 C CN100390353 C CN 100390353C
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- CN
- China
- Prior art keywords
- timber
- hydrofluoric acid
- crop straw
- acid
- environment protection
- Prior art date
- 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 present invention relates to an environment protection method for making paper and making pulp. A new additive substitutes for alkali, acid and salt which are widely used, and little wastewater is produced without artificially added acid, alkali and salt which subsequently become waste liquid residues. The present invention uses hydrofluoric acid as an additive in the process of making pulp, and the use concentration of the hydrofluoric acid is from 0.1% to 100%. Foreign substances are removed from pulverized crop straw or timber which is added to a container for resisting hydrofluoric acid erosion; after the hydrofluoric acid is added, the crop straw or the timber is heated in a boiling water bath until the straw or the timber is transparent and is softened, and the crop straw or the timber is dried and blown after being taken out; finally, the crop straw or the timber goes into other paper making steps.
Description
One, technical field:
The present invention relates to a kind of pulping and papermaking method, especially relate to a kind of environment protection pulping and papermaking method.
Two, background technology:
The method that present paper-making pulping adopts, before the paper making raw material boiling, add extra elements such as sodium, sulphur, ammonia usually, after high temperature, autoclaving, cause containing in the papermaking wastewater a large amount of restored acid, alkali and salt of being difficult to, causing originally, variable color appears in colourless raw material components.Silicon ribbon in the raw material comes thickness, need add chemical silica removal agent single-minded, that be not hydrofluoric acid separately.
Three, summary of the invention:
The present invention is in order to solve the weak point in the above-mentioned background technology, a kind of environment protection pulping and papermaking method is provided, it adopts new additive to replace widely used alkali, acid and salt, and the waste water of generation is few, inartificial that add, then become acid, alkali and the salt of waste liquid residue.
For achieving the above object, the technical solution used in the present invention is:
A kind of environment protection pulping and papermaking method, it is characterized in that: adopt hydrofluoric acid as the additive in the pulping process, through agricultural crop straw or the timber of pulverizing, remove foreign matter, join then in the container that hydrofluoric acid resistant corrodes, adding volume ratio again is 1: the volumetric concentration of 1-1.5 is 40% hydrofluoric acid solution, is heated to see that stalk or timber are transparent and softening in boiling water bath, pull the back out and drench dried, blowing, enter other papermaking operation at last.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, the present invention is except H
+In addition, do not increase any other element in the raw material.
2, the waste water that produces of the present invention is few, inartificial that add, then become acid, alkali and the salt of waste liquid residue.
Four, the specific embodiment:
Production technology of the present invention comprises: raw material pulverizing, removal of impurities, add acid, other follow-up technology of boiling.
Principle of the present invention is: the silicon in stalk, the timber is one of reason that produces fibrous material hardness and waste water thickness.At first by hydrofluoric acid silica removal softening fibre material, fluorine and silicon very easily form the silicon fluoride of gaseous state behind the chemical combination and the effusion boiling container dissolves in the soda ash solution by conduit.The H of hydrofluoric acid
+Hydrolysis removes delignification and hemicellulose.
Have only " fluorine " and " hydrogen " two kinds of elements in the hydrofluoric acid molecule, the silicon in fluorine and stalk, the timber is combined into the silicon fluoride of gaseous state, thereby thoroughly leaves stalk and timber, the H in the hydrofluoric acid
+Just in time be hydrolyst and the reductant that cellulose, lignin and hemicellulose are separated.And along with the chemical combination of fluorine in the hydrofluoric acid and the silicon in the stalk, dissociating of hydrofluoric acid progressively strengthened, and makes the weak acid effect of hydrofluoric acid progressively strengthen being the strong acid effect.
Embodiment:
Wheat stalk is ground into the 1-2cm size, removes dust, foreign matter.Put into the Plastic Drum compacting of 100 ℃ of high temperature of ability, add 1: 40% (V/V) hydrofluoric acid solution of 1-1.5 (V/V), putting into boiling water bath heats while stirring, transparent up to stalk, the cellulose that can be clearly seen that parallel distribution is for extremely, the silicon fluoride gas that heating process is discharged is concentrated preservation by conduit, and absorbs with soda ash.The cellulose pulled out enters other conventional operation such as defibrination after air-dry through simple Lin Xi.The liquid that stays is looked its viscosity, and low viscous liquid can be once more as the hydrolysis of stalk, and the fluorine in liquid disappears fully.The liquid of thickness can be used as the separation and Extraction of lignin, half fiber.
Claims (1)
1. environment protection pulping and papermaking method, it is characterized in that: adopt hydrofluoric acid as the additive in the pulping process, through agricultural crop straw or the timber of pulverizing, remove foreign matter, join then in the container that hydrofluoric acid resistant corrodes, adding volume ratio again is 1: the volumetric concentration of 1-1.5 is 40% hydrofluoric acid solution, is heated to see that stalk or timber are transparent and softening in boiling water bath, pull the back out and drench dried, blowing, enter other papermaking operation at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227590A CN100390353C (en) | 2005-12-29 | 2005-12-29 | Environment protection pulping and papermaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227590A CN100390353C (en) | 2005-12-29 | 2005-12-29 | Environment protection pulping and papermaking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1793493A CN1793493A (en) | 2006-06-28 |
| CN100390353C true CN100390353C (en) | 2008-05-28 |
Family
ID=36805132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100227590A Expired - Fee Related CN100390353C (en) | 2005-12-29 | 2005-12-29 | Environment protection pulping and papermaking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100390353C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839556A (en) * | 2011-06-23 | 2012-12-26 | 陈培豪 | Method for preprocessing plant cellulose raw material |
| CN107905012A (en) * | 2017-11-24 | 2018-04-13 | 广西博白焕发工艺品有限公司 | A kind of materials recycling processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB438643A (en) * | 1934-03-13 | 1935-11-20 | British Celanese | Improvements in or relating to the manufacture of cellulose |
-
2005
- 2005-12-29 CN CNB2005100227590A patent/CN100390353C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB438643A (en) * | 1934-03-13 | 1935-11-20 | British Celanese | Improvements in or relating to the manufacture of cellulose |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1793493A (en) | 2006-06-28 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |