CN1099500C - Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem - Google Patents
Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem Download PDFInfo
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- CN1099500C CN1099500C CN00123278A CN00123278A CN1099500C CN 1099500 C CN1099500 C CN 1099500C CN 00123278 A CN00123278 A CN 00123278A CN 00123278 A CN00123278 A CN 00123278A CN 1099500 C CN1099500 C CN 1099500C
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- hemp stem
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Abstract
The present invention belongs to a paper making technology, particularly to a method for producing bleached pulp completely without chlorine, paper and a paper board by a whole hemp stem. In the method for producing the pulp completely without chlorine by the whole hemp stem, the whole hemp stem is used as a raw material, and the whole hemp stem is placed into a boiler after cut, dedusted and immersed in advance. A boiling agent uses ammonium sulfite and potassium sulfate, a buffering agent uses urea, and an auxiliary agent can use anthraquinone or sulfur. The whole hemp stem is bleached. The present invention is a technology for activating hydrogen peroxide by the urea. Novel neutral sulfite is used as the boiling agent, industrial waste liquid is easy to process in a biochemical mode and can be comprehensively used, and the technology is good for environment protection.
Description
The invention belongs to paper technology, a kind of method of utilizing cannabis total-bar to make total chlorine free bleaching paper pulp, paper and cardboard of saying so more accurately.
Paper industry adopts the long fiber needlebush usually, moderate fiber length leaf wood, bamboo, reed and staple fibre rice wheat straw etc. are the papermaking base stock, manufacturing technique adopts traditional chemical pulping method usually, mainly be alkaline cooking and acid cooking technology, utilize alkali or acid as main digestant, it is C/DEH tri-stage bleaching technology that general hypochlorite single stage bleaching H of employing or chlorination C or chlorine dioxide D-alkali treatment E-hypochlorite H are handled in bleaching, the industrial bleaching waste liquid that above-mentioned technical process produces contains the carcinogen dioxin and is difficult for purified treatment, this industrial wastewater serious harm ecological environment and human health.
Given this; the object of the present invention is to provide a kind of method of utilizing cannabis total-bar to make total chlorine free bleaching paper pulp; adopt cannabis total-bar as a kind of new paper making raw material among the present invention; the neutral sulfite that utilizes innovation is as digestant; industrial wastes is easy to biochemical treatment; and can fully utilize, help environmental protection.Urea activation hydrogen peroxide two-stage or multistage technology are adopted in bleaching, realize total chlorine free bleaching paper pulp, and bleaching waste liquor and goods do not contain the environment-friendly quality that dioxin helps improving paper pulp and paper products.
Purpose of the present invention is achieved through the following technical solutions: a kind of method of utilizing the cannabis total-bar manufacturing completely without chlorine paper pulp is a raw material with the cannabis total-bar, through cut-out, dedusting, give soak after, drop into boiling vessel; Digestant adopts, and ammonium sulfite and potassium sulfate, buffer are urea, and auxiliary agent, and auxiliary agent can be anthraquinone or sulphur, bleaching process, and the present invention activates hydrogen peroxide process with urea; Wherein each chemicals to the percentage by weight of hemp raw material is:
With ammonium sulfite and potassium sulfate is main digestant,
Ammonium sulfite 10-40%
Potassium sulfate 7-25%
Urea 2-6%
Anthraquinone 0.05-1%, or sulphur 0.5-3%
The rotary spherical digester digesting technoloy is a liquor ratio: 2.3-3.4, and heating-up time 0.45-1.5 hour, be warming up to 145-185 ℃, be incubated 0.5-3.5 hour;
Association with pulp bleaching adopts the hydrogen peroxide bleaching technology of urea activation, and process conditions are:
Get hydrogen peroxide 1-4%
Urea 0.5-4.5%
Magnesium sulfate 0.05-1%
Sodium metasilicate 2-5%
NaOH 1-2%
Pulp density 4-10%
Handled 1 hour down at 70-90 ℃, bleaching process can repeat by multistage.
In this bleaching process process, because urea can improve pulp brightness and protection sheet slurry viscosity to the activation of hydrogen peroxide.Because bleaching agent used in the whole bleaching process is not chloride, so be referred to as total chlorine free bleaching.
Be main digestant with sulphite ammonium and potassium sulfate and mixing afterreaction product potassium sulfite thereof among the present invention, its industrial wastes is nitrogenous fertilizer and potash fertilizer, can realize effective comprehensive utilization, helps environmental protection simultaneously and increases economic benefit.With the buffer of urea as adjusting cooking liquor pH value, helping preventing the corrosion of carbon steel digesting apparatus among the present invention, have positive effect for prolonging service life of equipment, also is nitrogenous fertilizer simultaneously.Bleaching process of the present invention is a total chlorine free bleaching, and paper products and industrial wastewater do not contain dioxin, helps improving the paper products environment-friendly quality, reduces environmental pollution to greatest extent.
Embodiment 1, is raw material with the cannabis total-bar, through cut-out, dedusting, give soak after, drop into boiling vessel, medicine to the percentage by weight of hemp raw material is:
Ammonium sulfite 25%
Potassium sulfate 15%
Urea 4%
Anthraquinone 0.3%
The rotary spherical digester digesting technoloy is a liquor ratio: 2.8, and 1 hour heating-up time, be warming up to 175 ℃, be incubated 2 hours;
Association with pulp bleaching adopts the hydrogen peroxide bleaching technology of urea activation, and process conditions are:
Medicine to floating the paper pulp percentage by weight is not
Hydrogen peroxide 2%
Urea 2%
Magnesium sulfate 0.3%
Sodium metasilicate 3%
NaOH 1.5%
Pulp density 8%
Handled 1 hour down at 80 ℃, promptly get total chlorine free bleaching paper pulp, paper or cardboard.
Embodiment 2, are raw material with the cannabis total-bar, through cut-out, dedusting, give soak after, drop into boiling vessel, medicine to the percentage by weight of hemp raw material is:
Ammonium sulfite 25%
Potassium sulfate 15%
Urea 4%
Sulphur 1%
The rotary spherical digester digesting technoloy is a liquor ratio: 2.8, and 1 hour heating-up time, be warming up to 175 ℃, be incubated 2 hours;
Association with pulp bleaching adopts the hydrogen peroxide bleaching technology of urea activation, and process conditions are:
Medicine to floating the paper pulp percentage by weight is not
Hydrogen peroxide 2%
Urea 2%
Magnesium sulfate 0.3%
Sodium metasilicate 3%
NaOH 1.5%
Pulp density 8%
Handled 1 hour down at 80 ℃, promptly get total chlorine free bleaching paper pulp, paper or cardboard.
Claims (1)
1, a kind of method of utilizing the cannabis total-bar manufacturing completely without chlorine paper pulp is characterized in that: digestant adopts ammonium sulfite and potassium sulfate, and buffer is a urea, and auxiliary agent, and auxiliary agent can be anthraquinone or sulphur, and following boiling chemicals to hemp raw material weight percentage is:
Ammonium sulfite 10-40%
Potassium sulfate 7-25%
Urea 2-6%
Anthraquinone 0.05-1, or the following bleached chemical medicine of sulphur 0.5-3% to floating the paper pulp percentage by weight is not:
Hydrogen peroxide 1-4%
Urea 0.5-4.5%
Magnesium sulfate 0.05-1%
Sodium metasilicate 2-5%
NaOH 1-2% rotary spherical digester digesting technoloy is:
Liquor ratio 2.3-3.4
Heating-up time 0.45-1.5 hour, rise
Bleaching process was in temperature retention time 0.5-3.5 hour: handled 1 hour down at 70-90 ℃, bleaching process can multistage repeats manufacture method and be: be raw material with the cannabis total-bar, through cut-out, dedusting, give soak after, drop into
Boiling vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00123278A CN1099500C (en) | 2000-11-21 | 2000-11-21 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00123278A CN1099500C (en) | 2000-11-21 | 2000-11-21 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290786A CN1290786A (en) | 2001-04-11 |
| CN1099500C true CN1099500C (en) | 2003-01-22 |
Family
ID=4589736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00123278A Expired - Fee Related CN1099500C (en) | 2000-11-21 | 2000-11-21 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099500C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295396C (en) * | 2004-10-26 | 2007-01-17 | 田新 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
| CN102108644B (en) * | 2009-12-24 | 2012-08-08 | 深圳市美中现代科技发展有限公司 | Pollution-free production process of plant fiber pulp |
| CN102363929A (en) * | 2011-11-30 | 2012-02-29 | 中冶纸业银河有限公司 | Method for improving hydrogen peroxide bleaching efficiency of paper pulp |
| CN102644211B (en) * | 2012-05-22 | 2014-05-28 | 云南聚恒科技有限公司 | Preparation method of industrial hemp full stalk bleaching chemical pulp |
| CN103161091A (en) * | 2013-03-14 | 2013-06-19 | 牡丹江恒丰纸业股份有限公司 | Production method of full hemp hand-rolled paper |
| CN103726382B (en) * | 2013-12-31 | 2016-08-17 | 安徽泾县千年古宣宣纸有限公司 | A kind of pure straw Chinese art paper and chloride-free bleaching production process thereof |
| CN106368030B (en) * | 2016-09-19 | 2018-12-14 | 昆明理工大学 | The method that hemp's woody-core total chlorine free bleaching slurry prepares food wrapper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101264A (en) * | 1987-12-26 | 1988-07-27 | 武汉市纺织科学研究所 | The efficient chemical degumming of hemp method of removing lignin |
| CN1131713A (en) * | 1995-09-21 | 1996-09-25 | 河北省国营大曹庄农场造纸厂 | Production of high-strength corrugated base paper with straw pulp by neutral ammonium sulfite process |
| CN1247914A (en) * | 1998-09-11 | 2000-03-22 | 李占争 | Digestant for solving the problem of paper-making pollution |
-
2000
- 2000-11-21 CN CN00123278A patent/CN1099500C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101264A (en) * | 1987-12-26 | 1988-07-27 | 武汉市纺织科学研究所 | The efficient chemical degumming of hemp method of removing lignin |
| CN1131713A (en) * | 1995-09-21 | 1996-09-25 | 河北省国营大曹庄农场造纸厂 | Production of high-strength corrugated base paper with straw pulp by neutral ammonium sulfite process |
| CN1247914A (en) * | 1998-09-11 | 2000-03-22 | 李占争 | Digestant for solving the problem of paper-making pollution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1290786A (en) | 2001-04-11 |
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Owner name: TIAN XIN Free format text: FORMER OWNER: SHENYANG CITY NATURAL FIBER INST. Effective date: 20040827 |
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Effective date of registration: 20040827 Address after: 110035 No. 4 Taibai Mountain Road, Huanggu District, Liaoning, Shenyang Patentee after: Tian Xin Address before: 110035 No. 4 Taibai Mountain Road, Huanggu District, Liaoning, Shenyang Patentee before: Shenyang City Natural Fiber Inst. |
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Granted publication date: 20030122 Termination date: 20091221 |