CN104631179A - Method for removing ink of waste paper - Google Patents
Method for removing ink of waste paper Download PDFInfo
- Publication number
- CN104631179A CN104631179A CN201310558004.7A CN201310558004A CN104631179A CN 104631179 A CN104631179 A CN 104631179A CN 201310558004 A CN201310558004 A CN 201310558004A CN 104631179 A CN104631179 A CN 104631179A
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- China
- Prior art keywords
- waste paper
- deinking
- ink
- steps
- pulping
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
- D21C5/027—Chemicals therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Paper (AREA)
Abstract
The invention discloses a method for removing ink of waste paper, which comprises the following steps: removing ink of waste paper through repulping; removing slag and concentrating; and floating to remove ink. An ink removal agent is added in the process of removing ink through waste paper repulping, the ink removal agent is prepared through the following steps: weighing the following components according to weight percentage: 10-15% of fatty alcohol polyoxyethylene ether, 43-46% of sodium dodecyl benzene sulfonate, 2-5% of tween 80 and balance of water. In the process of floating to remove ink, a trapping agent is added, a method for preparing the trapping agent comprises the following steps: weighing the following components according to weight percentage: 20-30% of sodium stearate, 5-8% of polyoxyethylene ether phosphomonoester, and 65-70% of water. According to the method, under whiteness guarantee condition, the residual amount of ink on the recycled paper is little, and secondary fiber yield is high.
Description
Technical field
The present invention relates to pulp and paper technology field, specifically disclose a kind of deinking process for waste paper.
Background technology
The blank sheet of paper slurry of production requirement is met in order to make the waste paper of printing become, improve the use value of secondary stock and produce the rank of paper, need from waste paper except removal ink, resin etc., the process of having carried out this process is deinking, and the whole process of deinking is broadly divided into following 3 steps: discongest defibre; Ink is departed from from fiber; The ink particle deviate from is removed from slurry.The process of deinking is the process of a chemistry and physics, makes ink and fiber problem soak, expand, come off, disperse, trap removing by deinking chemicals.
The deinking agent used in conventional deinking methods only overweights and removes ink and sicker, and polluting again of ignoring that deinking agent causes environment the infringement of regenerated fiber and self, the even biological degradability extreme difference had, enters rivers very harmful.
Summary of the invention
The object of the invention is to: for Problems existing in above-mentioned traditional deinking technique; a kind of deinking process for waste paper is provided; kinds of surfactants used is few, and the biological degradability of surfactant, all more than 90%, solves the protection of regenerated fiber and the problem of self environmental pollution.
To achieve these goals, the technical solution used in the present invention is:
A kind of deinking process for waste paper, comprises the following steps:
S1, the deinking of waste paper pulping: waste paper is put into pulper, add deinking agent and other chemical industry auxiliary material successively in pulper, add hot water and be 15 ~ 18% by pulp consistency control, pulping temperature is 65 ~ 70 DEG C, pulping time 25 ~ 30min;
S2, slagging-off concentrate: the slurry after pulping is put into scummer and removed the gred, and the slurry after slagging-off enters thickener, carries out removing Waste water concentrating;
S3, floatation and ink removing: enter flotation cell after the pulp dilution after concentrated, add trapping agent in flotation cell, carry out floatation and ink removing, then enter high-speed pulp washer pulp washing, make good slurry.
In step S1, described deinking agent obtains according to following steps: according to percentage by weight, take following component: fatty alcohol-polyoxyethylene ether is 10 ~ 15%, neopelex is 43 ~ 46%, and Tween 80 is 2 ~ 5%, and all the other are water; Then be uniformly mixed and form.
In step S1, the addition of described deinking agent is 1.3 ~ 1.7 ‰ of waste paper by weight percentage.
In step S1, the addition of described chemical industry auxiliary material is 5 ~ 7% of waste paper by weight percentage, and this chemical industry auxiliary material comprises caustic soda, waterglass, hydrogen peroxide, and weight ratio is 2:3:1.
In step S3, described trapping agent obtains according to following steps: according to percentage by weight, take following component: odium stearate is 20 ~ 30%, polyoxyethylene ether phosphate monoester is 5 ~ 8%, and all the other are water; Then be uniformly mixed and form.
In step S3, the addition of described trapping agent is 0.3 ~ 0.7 ‰ of waste paper by weight percentage.
Owing to have employed technique scheme, the invention has the beneficial effects as follows:
A kind of deinking process for waste paper of the present invention, kinds of surfactants used is few, and the biological degradability of surfactant, all more than 90%, is well protected regenerated fiber, and self is also very little to the pollution of environment; The main technological steps adopted, for adding deinking agent and trapping agent, effectively simplifies technological process, economize energy; When ensureing whiteness, the recycled writing paper ink remaining quantity obtained is few, and regenerated fiber yield is high.
Detailed description of the invention
The invention will be further elaborated by the following examples:
The preparation method of the deinking agent described in following examples is: water is heated to 40 DEG C ± 2 DEG C, then adds alkyl polyoxyethylene ether while stirring to all dissolving; Add neopelex to all dissolving; Adding Tween 80 again to all dissolving, being deinking agent.The preparation method of trapping agent is: polyoxyethylene ether and phosphorus pentoxide at a certain temperature esterification are occurred, and generates polyoxyethylene ether phosphate monoester; Heat water to 60 DEG C ± 2 DEG C the odium stearate powder of 20 ~ 30% ratios stirred dissolve after, then the polyoxyethylene ether phosphate monoester of corresponding proportion is added, dissolves, be trapping agent.
Embodiment 1:
S1, the deinking of waste paper pulping: waste paper is put into pulper, add deinking agent and other chemical industry auxiliary material successively in pulper, add hot water and be 15% by pulp consistency control, pulping temperature is 65 DEG C, pulping time 25min.The addition of this deinking agent is 1.3 ‰ of waste paper by weight percentage; The addition of described chemical industry auxiliary material is 5% of waste paper by weight percentage, and this chemical industry auxiliary material comprises caustic soda, waterglass, hydrogen peroxide, and weight ratio is 2:3:1.Deinking agent obtains according to following steps: according to percentage by weight, take following component: fatty alcohol-polyoxyethylene ether is 12%, neopelex is 43%, and Tween 80 is 2%, and water is 43%; Then be uniformly mixed and form.
S2, slagging-off concentrate: the slurry after pulping is put into scummer and removed the gred, and the slurry after slagging-off enters thickener, carries out removing Waste water concentrating.
S3, floatation and ink removing: enter flotation cell after the pulp dilution after concentrated, add trapping agent in flotation cell, carry out floatation and ink removing, then enter high-speed pulp washer pulp washing, make good slurry.The addition of trapping agent is 0.3 ‰ of waste paper by weight percentage.Trapping agent obtains according to following steps: according to percentage by weight, take following component: odium stearate is 25%, polyoxyethylene ether phosphate monoester is 7%, and water is 68%; Then be uniformly mixed and form.
Embodiment 2:
S1, the deinking of waste paper pulping: waste paper is put into pulper, add deinking agent and other chemical industry auxiliary material successively in pulper, add hot water and be 17% by pulp consistency control, pulping temperature is 68 DEG C, pulping time 30min.The addition of this deinking agent is 1.5 ‰ of waste paper by weight percentage; The addition of described chemical industry auxiliary material is 6% of waste paper by weight percentage, and this chemical industry auxiliary material comprises caustic soda, waterglass, hydrogen peroxide, and weight ratio is 2:3:1.Deinking agent obtains according to following steps: according to percentage by weight, take following component: fatty alcohol-polyoxyethylene ether is 15%, neopelex is 43%, and Tween 80 is 2%, and water is 40%; Then be uniformly mixed and form.
S2, slagging-off concentrate: the slurry after pulping is put into scummer and removed the gred, and the slurry after slagging-off enters thickener, carries out removing Waste water concentrating.
S3, floatation and ink removing: enter flotation cell after the pulp dilution after concentrated, add trapping agent in flotation cell, carry out floatation and ink removing, then enter high-speed pulp washer pulp washing, make good slurry.The addition of trapping agent is 0.5 ‰ of waste paper by weight percentage.Trapping agent obtains according to following steps: according to percentage by weight, take following component: odium stearate is 22%, polyoxyethylene ether phosphate monoester is 8%, and water is 70%; Then be uniformly mixed and form.
Embodiment 3:
S1, the deinking of waste paper pulping: waste paper is put into pulper, add deinking agent and other chemical industry auxiliary material successively in pulper, add hot water and be 18% by pulp consistency control, pulping temperature is 65 DEG C, pulping time 28min.The addition of this deinking agent is 1.5 ‰ of waste paper by weight percentage; The addition of described chemical industry auxiliary material is 6% of waste paper by weight percentage, and this chemical industry auxiliary material comprises caustic soda, waterglass, hydrogen peroxide, and weight ratio is 2:3:1.Deinking agent obtains according to following steps: according to percentage by weight, take following component: fatty alcohol-polyoxyethylene ether is 10%, neopelex is 43%, and Tween 80 is 2%, and water is 45%; Then be uniformly mixed and form.
S2, slagging-off concentrate: the slurry after pulping is put into scummer and removed the gred, and the slurry after slagging-off enters thickener, carries out removing Waste water concentrating.
S3, floatation and ink removing: enter flotation cell after the pulp dilution after concentrated, add trapping agent in flotation cell, carry out floatation and ink removing, then enter high-speed pulp washer pulp washing, make good slurry.The addition of trapping agent is 0.5 ‰ of waste paper by weight percentage.Trapping agent obtains according to following steps: according to percentage by weight, take following component: odium stearate is 24%, polyoxyethylene ether phosphate monoester is 6%, and water is 70%; Then be uniformly mixed and form.
Carry out contrast experiment according to the method for above three embodiments and three kinds of waste paper deinking agents method conventionally of purchasing back from the market, obtained as following table data:
Experimental result shows, uses de-inking method of the present invention, and while guarantee deinking agent effect, fiber yield has obvious advantage, the residual quantity of ink significantly reduces simultaneously.
Claims (6)
1. a deinking process for waste paper, is characterized in that, comprises the following steps:
S1, the deinking of waste paper pulping: waste paper is put into pulper, add deinking agent and other chemical industry auxiliary material successively in pulper, add hot water and be 15 ~ 18% by pulp consistency control, pulping temperature is 65 ~ 70 DEG C, pulping time 25 ~ 30min;
S2, slagging-off concentrate: the slurry after pulping is put into scummer and removed the gred, and the slurry after slagging-off enters thickener, carries out removing Waste water concentrating;
S3, floatation and ink removing: enter flotation cell after the pulp dilution after concentrated, add trapping agent in flotation cell, carry out floatation and ink removing, then enter high-speed pulp washer pulp washing, make good slurry.
2. deinking process for waste paper according to claim 1, it is characterized in that, in step S1, described deinking agent obtains according to following steps: according to percentage by weight, take following component: fatty alcohol-polyoxyethylene ether is 10 ~ 15%, neopelex is 43 ~ 46%, and Tween 80 is 2 ~ 5%, and all the other are water; Then be uniformly mixed and form.
3. deinking process for waste paper according to claim 1 and 2, is characterized in that, in step S1, the addition of described deinking agent is 1.3 ~ 1.7 ‰ of waste paper by weight percentage.
4. deinking process for waste paper according to claim 1, is characterized in that, in step S1, the addition of described chemical industry auxiliary material is 5 ~ 7% of waste paper by weight percentage, and this chemical industry auxiliary material comprises caustic soda, waterglass, hydrogen peroxide, and weight ratio is 2:3:1.
5. deinking process for waste paper according to claim 1, is characterized in that, in step S3, described trapping agent obtains according to following steps: according to percentage by weight, take following component: odium stearate is 20 ~ 30%, polyoxyethylene ether phosphate monoester is 5 ~ 8%, and all the other are water; Then be uniformly mixed and form.
6. deinking process for waste paper according to claim 1 or 5, it is characterized in that, in step S3, the addition of described trapping agent is 0.3 ~ 0.7 ‰ of waste paper by weight percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558004.7A CN104631179A (en) | 2013-11-11 | 2013-11-11 | Method for removing ink of waste paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558004.7A CN104631179A (en) | 2013-11-11 | 2013-11-11 | Method for removing ink of waste paper |
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| CN104631179A true CN104631179A (en) | 2015-05-20 |
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| CN201310558004.7A Pending CN104631179A (en) | 2013-11-11 | 2013-11-11 | Method for removing ink of waste paper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419576A (en) * | 2017-08-08 | 2017-12-01 | 邓州市华鑫纸业有限公司 | The production method of deinking recycled writing paper |
| CN108729279A (en) * | 2018-06-07 | 2018-11-02 | 南阳中昊科技有限公司 | Waste paper resources clean utilization new method |
| CN109930414A (en) * | 2017-12-15 | 2019-06-25 | 中国制浆造纸研究院有限公司 | A kind of waste paper deinking agent based on cold alkali density waste liquid |
Citations (7)
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|---|---|---|---|---|
| EP0030057A1 (en) * | 1979-11-29 | 1981-06-10 | Chem-Y Fabriek Van Chemische Producten B.V. | Method of deinking paper pulp and paper products obtained employing this method |
| US5385639A (en) * | 1993-08-27 | 1995-01-31 | Hoechst Celanese Corporation | Deinking wastepaper printed with oil-based ink |
| CN101725069A (en) * | 2009-10-31 | 2010-06-09 | 华南理工大学 | Method for improving removal effect of ink in waste paper pulp |
| CN102108649A (en) * | 2010-12-01 | 2011-06-29 | 山东晨鸣纸业集团股份有限公司 | Waste paper deinking process method |
| CN102337692A (en) * | 2011-09-26 | 2012-02-01 | 山东轻工业学院 | Method for improving deinking performing of mixed office wastepaper |
| CN102493247A (en) * | 2011-12-14 | 2012-06-13 | 中冶美利浆纸有限公司 | Application of book paper to wastepaper deinking instead of office wastepaper |
| CN102803603A (en) * | 2009-06-17 | 2012-11-28 | 凯米罗总公司 | Deinking process |
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2013
- 2013-11-11 CN CN201310558004.7A patent/CN104631179A/en active Pending
Patent Citations (7)
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| EP0030057A1 (en) * | 1979-11-29 | 1981-06-10 | Chem-Y Fabriek Van Chemische Producten B.V. | Method of deinking paper pulp and paper products obtained employing this method |
| US5385639A (en) * | 1993-08-27 | 1995-01-31 | Hoechst Celanese Corporation | Deinking wastepaper printed with oil-based ink |
| CN102803603A (en) * | 2009-06-17 | 2012-11-28 | 凯米罗总公司 | Deinking process |
| CN101725069A (en) * | 2009-10-31 | 2010-06-09 | 华南理工大学 | Method for improving removal effect of ink in waste paper pulp |
| CN102108649A (en) * | 2010-12-01 | 2011-06-29 | 山东晨鸣纸业集团股份有限公司 | Waste paper deinking process method |
| CN102337692A (en) * | 2011-09-26 | 2012-02-01 | 山东轻工业学院 | Method for improving deinking performing of mixed office wastepaper |
| CN102493247A (en) * | 2011-12-14 | 2012-06-13 | 中冶美利浆纸有限公司 | Application of book paper to wastepaper deinking instead of office wastepaper |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419576A (en) * | 2017-08-08 | 2017-12-01 | 邓州市华鑫纸业有限公司 | The production method of deinking recycled writing paper |
| CN107419576B (en) * | 2017-08-08 | 2019-06-04 | 邓州市华鑫纸业有限公司 | The production method of deinking recycled writing paper |
| CN109930414A (en) * | 2017-12-15 | 2019-06-25 | 中国制浆造纸研究院有限公司 | A kind of waste paper deinking agent based on cold alkali density waste liquid |
| CN108729279A (en) * | 2018-06-07 | 2018-11-02 | 南阳中昊科技有限公司 | Waste paper resources clean utilization new method |
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Effective date of abandoning: 20170531 |