CN100335715C - Microwave method for preprocessing pulping raw material - Google Patents
Microwave method for preprocessing pulping raw material Download PDFInfo
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- CN100335715C CN100335715C CNB2005100186247A CN200510018624A CN100335715C CN 100335715 C CN100335715 C CN 100335715C CN B2005100186247 A CNB2005100186247 A CN B2005100186247A CN 200510018624 A CN200510018624 A CN 200510018624A CN 100335715 C CN100335715 C CN 100335715C
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Abstract
The present invention relates to a microwave method for pre-processing pulping raw materials, which is characterized in that material pieces of traditional pulping plant raw materials are eradiated and processed by microwaves, and a physical structure channel in the plant raw materials which are correspondingly closed can be improved after the material pieces of the plant raw materials are eradiated and processed by the microwaves so as to be beneficial to the fast and homogeneous permeation of pulping chemicals. Macromolecules of lignin can be activated so as to be beneficial to the reaction for chemically separating the lignin, and an active group with a cellulose chemical structure is 'passivated 'so as to be beneficial to the protection of the cellulose; thereby, the pulp quality can be improved.
Description
Technical field
The present invention relates in a kind of system paper pulp the plant material tablet be carried out pretreated technology, be applied to adopt plant fiber material to carry out the pulp and paper technology field of slurrying.
Background technology
In the chemical treating process of traditional chemical method (comprising half chemical method and chemical mechanical pulping) pulping technique, because of chemicals and plant material to contact osmotic evenness poor, and cause paper pulp yield and quality to reduce.Improving one's methods of using at present is the chemical method of adding auxiliary agent, as adding anthraquinone, surfactant, strengthens slurrying delignification chemical reaction and the infiltration that improves chemicals.The toxicity that has anthraquinone causes the harm to human body, and many bubbles property of surfactant has increased slurrying subsequent treatment difficulty and aggravated environmental pollution.
Do not find by retrieval a kind of with microwave to the plant material tablet carry out the radiation preliminary treatment again the method for slurrying be disclosed or use.
Summary of the invention
In order to improve paper pulp yield and quality, overcome the defective that present interpolation auxiliary agent method exists, the invention provides a kind of microwave method for preprocessing of paper pulp raw material, be a kind of physical method that does not increase chemical contamination, can effectively improve pulping yield and quality.
Technical scheme of the present invention is: the microwave method for preprocessing of pulping raw material is characterized in that: the tablet to the plant material of traditional slurrying, carry out radiation treatment with microwave in advance.Tablet after the radiation treatment, the chemical reaction that carries out traditional chemical method (comprising half chemical method and chemical mechanical pulping) slurrying again.The plant material tablet is after microwave radiation processing, and the plant material internal physical structure passage of relative closure is improved, and helps the quick uniformly penetrating of pulping chemistry medicine; Lignin macromolecule is activated, and helps chemical delignification reaction; The active group of cellulose chemistry structure " passivation " helps protecting cellulose, improves pulp quality.
The microwave method for preprocessing of aforesaid pulping raw material is characterized in that: the microwave frequency of radiation treatment is 1500-5000MHz, and when the weight of tablet was the 100-1000 gram, microwave power was 500-1000 watt, and the radiation treatment time is 1-5 minute.
The preprocess method of aforesaid paper pulp raw material is characterized in that: the microwave frequency of radiation treatment is 2450MHz, and the radiation treatment time is 3 minutes.
Beneficial effect
Carry out the radiation preliminary treatment paper pulp of slurrying again through microwave, compare with carry out the direct slurrying of radiation preliminary treatment without microwave, its paper pulp yield improves 2%～4%; Pulp hardness (K value) reduces by 1～5; Former pulp brightness improves 2%～8%; Slurry paper fracture length improves 3%～18%; Slurry paper folding strength improves 3%～15%.
Carry out the radiation preliminary treatment paper pulp of slurrying again through microwave, compare with carry out the direct slurrying of radiation preliminary treatment without microwave, its bleachability obviously increases.Adopt same chemical bleaching condition contrast, its bleached pulp whiteness improves 2%～8%.
The specific embodiment
Example 1:
Raw material tablet: poplar sheet 800G (oven dry weight)
Microwave treatment conditions: 2450MHz; 650W; 3min
Cooking schedule:
The method soda processes
Alkali charge 22%
165 ℃ of maximum temperatures
Temperature retention time 30min
Liquor ratio 1: 6
Bleaching conditions
Method hypochlorite single stage bleaching
Chlorine dosage 5%
Starch dense 5%
39 ℃ of temperature
The boiling result:
Yield 55.20% (improving 2.98%) than untreated samples
Permanganate number 16.89 (reducing by 2.70) than untreated samples
Former pulp brightness 29.38% (improving 3.82%) than untreated samples
Bleaching results: whiteness 52.67% (improving 3.75%) than untreated samples
Brown stock handsheet performance: (28.6 ° of SR of beating degree)
Quantitative 60.51g/m
2
Fracture length 4259m (improving 14.78%) than untreated samples
Folding strength 14.75 (improving 11.23%) than untreated samples
Example 2:
Raw material tablet: pine 750G (oven dry weight)
Microwave treatment conditions: 2450MHz; 700W; 3min
Cooking schedule:
The method sulfate process
Alkali charge 26%
Sulphidity 25%
170 ℃ of maximum temperatures
Temperature retention time 60min
Liquor ratio 1: 6
Bleaching conditions:
Method hypochlorite single stage bleaching
Chlorine dosage 5%
Starch dense 5%
39 ℃ of temperature
Boiling result: yield 54.60% (improving 3.60%) than untreated samples
Permanganate number 20.36 (reducing by 4.22) than untreated samples
Former pulp brightness 25.38% (improving 3.98%) than untreated samples
Bleaching results: whiteness 49.66% (improving 4.01%) than untreated samples
Brown stock handsheet performance: (38.66 ° of SR of beating degree)
Quantitative 60.27g/m
2
Fracture length 5683m (improving 12.36%) than untreated samples
Folding strength 16.5 (improving 10.33%) than untreated samples
Example 3:
Raw material: reed 700G (oven dry weight)
Microwave treatment conditions: 2450MHz; 700W; 1.2min
Cooking schedule:
The method soda processes
Alkali charge 18%
160 ℃ of maximum temperatures
Temperature retention time 20min
Liquor ratio 1: 6
Bleaching conditions
Method hypochlorite single stage bleaching
Chlorine dosage 5%
Starch dense 5%
39 ℃ of temperature
The boiling result:
Yield 53.64% (improving 3.98%) than untreated samples
Permanganate number 7.82 (reducing by 3.23) than untreated samples
Former pulp brightness 31.95% (improving 4.88%) than untreated samples
Bleaching results: whiteness 71.81% (improving 5.63%) than untreated samples
Brown stock handsheet performance: (27.02 ° of SR of beating degree)
Quantitative 60.11g/m
2
Fracture length 3859m (improving 8.96%) than untreated samples
Folding strength 9.5 (improving 9.65%) than untreated samples
Claims (2)
1, the microwave method for preprocessing of pulping raw material, tablet to the plant material of traditional slurrying, carry out radiation treatment with microwave in advance, the microwave frequency of radiation treatment is 1500-5000MHz, it is characterized in that: when the weight of tablet is the 100-1000 gram, microwave power is 500-1000 watt, and the radiation treatment time is 1-5 minute.
2, the microwave method for preprocessing of paper pulp raw material as claimed in claim 1 is characterized in that: the microwave frequency of radiation treatment is 2450MHz, and the radiation treatment time is 3 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100186247A CN100335715C (en) | 2005-04-28 | 2005-04-28 | Microwave method for preprocessing pulping raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100186247A CN100335715C (en) | 2005-04-28 | 2005-04-28 | Microwave method for preprocessing pulping raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1696396A CN1696396A (en) | 2005-11-16 |
| CN100335715C true CN100335715C (en) | 2007-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100186247A Expired - Fee Related CN100335715C (en) | 2005-04-28 | 2005-04-28 | Microwave method for preprocessing pulping raw material |
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| CN (1) | CN100335715C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509209B (en) * | 2009-03-10 | 2011-02-09 | 中国林业科学研究院林产化学工业研究所 | Method of preparing clubbed nano-cellulose |
| CN103498375B (en) * | 2013-09-24 | 2015-06-03 | 昆明理工大学 | Method for pulping by broussonetia papyrifera white-bark |
| CN104005248B (en) * | 2014-05-20 | 2016-08-24 | 陕西科技大学 | A kind of plant fiber pretreatment method improving alkylation modification efficiency and alkylation modification method thereof |
| CN109722934A (en) * | 2017-10-31 | 2019-05-07 | 株洲千金药业股份有限公司 | A kind of bioanalysis dregs of a decoction pulping process |
| CN109718294A (en) * | 2017-10-31 | 2019-05-07 | 株洲千金药业股份有限公司 | A kind of prescriptions worth thousand gold dregs of a decoction resource regeneration prepares fiber and its method |
| CN109914098A (en) * | 2017-12-12 | 2019-06-21 | 株洲千金药业股份有限公司 | A kind of preparation method of dreg fibers material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4000032A (en) * | 1974-09-27 | 1976-12-28 | Mo Och Domsjo | Process of freeing cellulose fibers from lignocellulosic material by irradiation |
| CN1146512A (en) * | 1996-08-07 | 1997-04-02 | 南智军 | Pollution-free papermaking process by wave pressure pulping |
| JP2004285532A (en) * | 2003-03-25 | 2004-10-14 | Nippon Paper Industries Co Ltd | Method for acid treatment of kraft pulp |
-
2005
- 2005-04-28 CN CNB2005100186247A patent/CN100335715C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4000032A (en) * | 1974-09-27 | 1976-12-28 | Mo Och Domsjo | Process of freeing cellulose fibers from lignocellulosic material by irradiation |
| CN1146512A (en) * | 1996-08-07 | 1997-04-02 | 南智军 | Pollution-free papermaking process by wave pressure pulping |
| JP2004285532A (en) * | 2003-03-25 | 2004-10-14 | Nippon Paper Industries Co Ltd | Method for acid treatment of kraft pulp |
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| CN1696396A (en) | 2005-11-16 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhan Chenming Hanyang Paper Co., Ltd. Assignor: Hubei Industry University Contract fulfillment period: 2009.6.19 to 2015.6.19 contract change Contract record no.: 2009420010046 Denomination of invention: Microwave method for preprocessing pulping raw material Granted publication date: 20070905 License type: Exclusive license Record date: 2009.7.29 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.19 TO 2015.6.19; CHANGE OF CONTRACT Name of requester: WUHAN CHENMING HANYANG PAPER INDUSTRY CO., LTD. Effective date: 20090729 |
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Granted publication date: 20070905 Termination date: 20130428 |