CN102926266A - Method for producing dissolving pulp by adopting wheat straw pulp as raw material - Google Patents
Method for producing dissolving pulp by adopting wheat straw pulp as raw material Download PDFInfo
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Abstract
The present invention discloses a method for producing dissolving pulp by adopting wheat straw pulp as a raw material, and belongs to the field of pulping. According to the present invention, #6 wheat straw pulp, sodium hypochlorite, hydrogen peroxide and caustic soda are adopted as raw materials, and an alkali treatment, washing dehydration, sodium hypochlorite bleaching, washing dehydration, hydrogen peroxide bleaching, washing dehydration, alkali refining, washing dehydration, hydrogen peroxide bleaching, filtration washing dehydration and other processes are performed to prepare the dissolving pulp. The method has the following advantages that: the low price wheat straw pulp is adopted to replace high price wood pulp or high price bamboo pulp to produce the dissolving pulp, such that production cost is effectively reduced, equipment is not required to be added, the production process is simple, and product quality is good.
Description
Technical field
The invention belongs to the slurrying field, relate in particular to a kind of take the method for Straw Pulp as primary industry production dissolving pulp.
Background technology
Paper pulp forms take certain plants as Raw material processing, and the plant that is generally used for pulping raw material can be divided into 4 large classes: lumber fibre class, stem fiber-like, bast fiber class, seed hair fiber class, wherein especially with lumber fibre class, stem fiber-like use at most.The slurry that makes according to used fibrous raw material generally is divided into wood pulp, straw pulp, jute pulp, reed pulp, sugarcane slurry, bamboo pulp etc., but commonly used be wood pulp and straw pulp.With the wood pulp made, straw pulp through bleaching, extract the paper pulp that obtains after the operation such as organic solvent out and be called Time of Fluff Slurry, through after the filtration, purer Time of Fluff Slurry is called dissolving pulp.Dissolving pulp claims again spoelalty pulp, or refined stock, its main application is that dissolving pulp also is the raw material of the products such as glassine paper, pharmaceuticals industry sterilising filtration paper, acetate fiber, nitrocellulose, acid methyl cellulose, microcrystalline cellulose, cellulose ether as the viscose of producing textile raw material.Dissolving pulp is a kind of purer and uniform high-quality chemical pulp, and its content of alphacellulose 90%-98%, hemicellulose and lignin substantially remove totally and (be lower than 2%).Produce viscose in the weaving changeable with the adapted ratio of dissolving pulp, be generally about 30%, also can produce viscose with 100% dissolving pulp, viscose is close with cotton on quality, the each side such as comfortableness, gas permeability, environmental protection all have a clear superiority in than synthetic fiber, so viscose becomes the inevitable choice that substitutes cotton.The usage ratio of (cotton, synthetic fiber, viscose) viscose is about 10% in the present domestic three major types cotton spinning raw material, tends to be promoted to 20%-25% the foreseeable future; The main raw material(s) of producing viscose is linter pulp and dissolving pulp (linter pulp derives from cotton stalk), in recent years since the sown areas of cotton increase seldom, the source of linter pulp is restricted, spinnability, the printing and dyeing property of the viscose of producing with dissolving pulp in addition are better than linter pulp, therefore, when the cost of dissolving pulp and linter pulp quite or when lower, viscose producer just is willing to use dissolving pulp, so dissolving pulp becomes the important source material of producing viscose.Early technology utilization timber or bamboo wood are produced dissolving pulp, two process routes are arranged: 1. prehydrolytic sulfate process, 2. sulphite process, two kinds of methods are compared, the content of alphacellulose of the fertile dissolving pulp of prehydrolysis sulfate is high than sulphite process, adaptability to raw material is also wide, so the prehydrolytic sulfate process use is more, but this route uses timber or bamboo wood to be raw material, timber or bamboo wood price are high, and the source is restricted.In order to overcome defects, the present invention is take the Straw Pulp cheap, that the source is abundant as primary industry production dissolving pulp, the method is a kind of new technical scheme that obtains by technological innovation in the process of producing dissolving pulp take timber as raw material, and it is low that its advantage is that raw material sources enrich price.The raw material that the present invention uses has 6# Straw Pulp, clorox, hydrogen peroxide, caustic soda, by making dissolving pulp after alkali treatment, washing dehydration, sodium hypochlorite bleaching, washing dehydration, hydrogen peroxide bleaching, washing dehydration, alkali refining, washing dehydration, hydrogen peroxide bleaching, the filtration washing dehydration, its advantage is to utilize cheap Straw Pulp to replace the higher wood pulp of price, bamboo pulp to produce dissolving pulp, effectively reduce production cost, and need not increase equipment, other simple, used raw material of production technology are versatile material, good product quality.
Summary of the invention
The problem that the present invention mainly solves provides a kind of take the method for Straw Pulp as primary industry production dissolving pulp, the method is a kind of new technical scheme that obtains by improvement in the process of producing dissolving pulp take timber, bamboo wood as raw material, its advantage is to utilize cheap Straw Pulp to replace higher wood pulp, the bamboo pulp of price to produce dissolving pulp, and the method is compared with former method to have need not increase that equipment, production technology are simple, raw material sources enrich the advantages such as price is low, good product quality.The raw material of producing this dissolving pulp use has: 6# Straw Pulp, water, clorox, hydrogen peroxide, caustic soda.
The present invention can be achieved through the following technical solutions:
A kind of production method of dissolving pulp is characterized in that being made of following steps:
1. with whiteness be 40.5%, ash content is that 2.73% 6# Straw Pulp is sent into to add and carried out alkali treatment in the alkali pool specialized, it is that 5% content is 17.5% caustic soda that adding accounts for total amount, temperature is 49 ℃-51 ℃ in the accent pond, stir process 1.4-1.6 hour, the parameter of starching after the alkali treatment was whiteness 48.5%, ash content 1.4%, alpha fibers content 77.96%.
2. the material after the alkali treatment is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration and added the clorox pool specialized, add that to account for total amount be 3% clorox, mixeding liquid temperature is 37 ℃-39 ℃ in the accent pond, stir to soak and carry out the bleaching first time, time is 1.9-2.1 hour, and the parameter of slurry is whiteness 80.4%, ash content 1.09%, alpha fibers content 72.12% after the bleaching for the first time.
3. the material after for the first time bleaching is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration and is added the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 3%, mixeding liquid temperature is 37 ℃-39 ℃ in the accent pond, stir to soak and carry out the bleaching second time, approximately 1.9-2.1 hour time, the parameter of slurry is whiteness 81%, ash content 1.02%, alpha fibers content 72.5% after the bleaching for the second time.
4. after the material after for the second time bleaching is sent to laundry and is washed the Water Extraction Machinery washing dehydration, send into to add and carry out alkali refining in the alkali pool specialized, add that to account for total amount be that 200% content is 17.5% caustic soda, temperature regulating is 54 ℃-56 ℃, reaction time is 0.725-0.775 hour, and the parameter of starching behind the alkali refining is whiteness 77.9%, ash content 1.32%, alpha fibers content 96.03%.
5. the material behind the alkali refining is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration and added the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 5%, bleach for the third time, temperature regulating is 44 ℃-46 ℃, reaction time is 1.4-1.6 hour, the parameter of slurry is whiteness 81.1%, ash content 1.1%, alpha fibers content 97.19% after the bleaching for the third time, sends to laundry after the slurry after for the third time bleaching is filtered to obtain dissolving pulp after washing the Water Extraction Machinery washing dehydration.
The invention has the beneficial effects as follows: provide a kind of take the method for Straw Pulp as primary industry production dissolving pulp, its advantage is to utilize cheap Straw Pulp to replace the higher wood pulp of price, bamboo pulp, effectively reduce production cost, and need not increase equipment, other simple, used raw material of production technology are versatile material, good product quality.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
With whiteness be 40.5%, ash content is that 2.73% 6# Straw Pulp is sent into to add and carried out alkali treatment in the alkali pool specialized, it is that 5% content is 17.5% caustic soda that adding accounts for total amount, temperature is 49 ℃ in the accent pond, stir process 1.6 hours, the parameter of starching after the alkali treatment are whiteness 48.5%, ash content 1.4%, alpha fibers content 77.96%; Material after the alkali treatment sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the clorox pool specialized, add that to account for total amount be 3% clorox, mixeding liquid temperature is 37 ℃ in the accent pond, stir to soak and carry out the bleaching first time, time is 2.1 hours, and the parameter of slurry is whiteness 80.4%, ash content 1.09%, alpha fibers content 72.12% after the bleaching for the first time; Material after for the first time bleaching sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 3%, mixeding liquid temperature is 37 ℃ in the accent pond, stir to soak and carry out the bleaching second time, approximately 2.1 hours time, the parameter of slurry is whiteness 81%, ash content 1.02%, alpha fibers content 72.5% after the bleaching for the second time; With the material after for the second time bleaching send to laundry wash the Water Extraction Machinery washing dehydration after, send into to add and carry out alkali refining in the alkali pool specialized, add that to account for total amount be that 200% content is 17.5% caustic soda, temperature regulating is 54 ℃, reaction time is 0.775 hour, and the parameter of starching behind the alkali refining is whiteness 77.9%, ash content 1.32%, alpha fibers content 96.03%; Material behind the alkali refining sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 5%, bleach for the third time, temperature regulating is 44 ℃, reaction time is 1.6 hours, the parameter of slurry is whiteness 81.1%, ash content 1.1%, alpha fibers content 97.19% after the bleaching for the third time, sends to laundry after the slurry after for the third time bleaching is filtered to obtain dissolving pulp after washing the Water Extraction Machinery washing dehydration.
Embodiment 2
With whiteness be 40.5%, ash content is that 2.73% 6# Straw Pulp is sent into to add and carried out alkali treatment in the alkali pool specialized, it is that 5% content is 17.5% caustic soda that adding accounts for total amount, temperature is 50 ℃ in the accent pond, stir process 1.5 hours, the parameter of starching after the alkali treatment are whiteness 48.5%, ash content 1.4%, alpha fibers content 77.96%; Material after the alkali treatment sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the clorox pool specialized, add that to account for total amount be 3% clorox, mixeding liquid temperature is 38 ℃ in the accent pond, stir to soak and carry out the bleaching first time, time is 2 hours, and the parameter of slurry is whiteness 80.4%, ash content 1.09%, alpha fibers content 72.12% after the bleaching for the first time; Material after for the first time bleaching sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 3%, mixeding liquid temperature is 38 ℃ in the accent pond, stir to soak and carry out the bleaching second time, approximately 2 hours time, the parameter of slurry is whiteness 81%, ash content 1.02%, alpha fibers content 72.5% after the bleaching for the second time; With the material after for the second time bleaching send to laundry wash the Water Extraction Machinery washing dehydration after, send into to add and carry out alkali refining in the alkali pool specialized, add that to account for total amount be that 200% content is 17.5% caustic soda, temperature regulating is 55 ℃, reaction time is 0.75 hour, and the parameter of starching behind the alkali refining is whiteness 77.9%, ash content 1.32%, alpha fibers content 96.03%; Material behind the alkali refining sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 5%, bleach for the third time, temperature regulating is 45 ℃, reaction time is 1.5 hours, the parameter of slurry is whiteness 81.1%, ash content 1.1%, alpha fibers content 97.19% after the bleaching for the third time, sends to laundry after the slurry after for the third time bleaching is filtered to obtain dissolving pulp after washing the Water Extraction Machinery washing dehydration.
Embodiment 3
With whiteness be 40.5%, ash content is that 2.73% 6# Straw Pulp is sent into to add and carried out alkali treatment in the alkali pool specialized, it is that 5% content is 17.5% caustic soda that adding accounts for total amount, temperature is 51 ℃ in the accent pond, stir process 1.4 hours, the parameter of starching after the alkali treatment are whiteness 48.5%, ash content 1.4%, alpha fibers content 77.96%; Material after the alkali treatment sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the clorox pool specialized, add that to account for total amount be 3% clorox, mixeding liquid temperature is 39 ℃ in the accent pond, stir to soak and carry out the bleaching first time, time is 1.9 hours, and the parameter of slurry is whiteness 80.4%, ash content 1.09%, alpha fibers content 72.12% after the bleaching for the first time; Material after for the first time bleaching sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 3%, mixeding liquid temperature is 39 ℃ in the accent pond, stir to soak and carry out the bleaching second time, approximately 1.9 hours time, the parameter of slurry is whiteness 81%, ash content 1.02%, alpha fibers content 72.5% after the bleaching for the second time; With the material after for the second time bleaching send to laundry wash the Water Extraction Machinery washing dehydration after, send into to add and carry out alkali refining in the alkali pool specialized, add that to account for total amount be that 200% content is 17.5% caustic soda, temperature regulating is 56 ℃, reaction time is 0.725 hour, and the parameter of starching behind the alkali refining is whiteness 77.9%, ash content 1.32%, alpha fibers content 96.03%; Material behind the alkali refining sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 5%, bleach for the third time, temperature regulating is 46 ℃, reaction time is 1.4 hours, the parameter of slurry is whiteness 81.1%, ash content 1.1%, alpha fibers content 97.19% after the bleaching for the third time, sends to laundry after the slurry after for the third time bleaching is filtered to obtain dissolving pulp after washing the Water Extraction Machinery washing dehydration.
Claims (6)
1. a method of producing dissolving pulp take Straw Pulp as raw material is characterized in that: take 6# Straw Pulp, water, clorox, hydrogen peroxide, caustic soda as raw material, obtain finished product by following steps.
2. a kind of method of producing dissolving pulp take Straw Pulp as raw material according to claim 1, the feature of its first step is: with whiteness be 40.5%, ash content is that 2.73% 6# Straw Pulp is sent into to add and carried out alkali treatment in the alkali pool specialized, it is that 5% content is 17.5% caustic soda that adding accounts for total amount, temperature is 49 ℃-51 ℃ in the accent pond, stir process 1.4-1.6 hour, the parameter of starching after the alkali treatment was whiteness 48.5%, ash content 1.4%, alpha fibers content 77.96%.
3. a kind of method of producing dissolving pulp take Straw Pulp as raw material according to claim 1, the feature of its second step is: the material after the alkali treatment is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the clorox pool specialized, add that to account for total amount be 3% clorox, mixeding liquid temperature is 37 ℃-39 ℃ in the accent pond, stir to soak and carry out the bleaching first time, time is 1.9-2.1 hour, and the parameter of slurry is whiteness 80.4%, ash content 1.09%, alpha fibers content 72.12% after the bleaching for the first time.
4. a kind of method of producing dissolving pulp take Straw Pulp as raw material according to claim 1, the feature in its 3rd step is: for the first time the material after the bleaching is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration and is added the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 3%, mixeding liquid temperature is 37 ℃-39 ℃ in the accent pond, stir to soak and carry out the bleaching second time, approximately 1.9-2.1 hour time, the parameter of slurry is whiteness 81%, ash content 1.02%, alpha fibers content 72.5% after the bleaching for the second time.
5. a kind of method of producing dissolving pulp take Straw Pulp as raw material according to claim 1, the feature in its 4th step is: after the material after the bleaching is sent to laundry and washed the Water Extraction Machinery washing dehydration for the second time, send into to add and carry out alkali refining in the alkali pool specialized, add that to account for total amount be that 200% content is 17.5% caustic soda, temperature regulating is 54 ℃-56 ℃, reaction time is 0.725-0.775 hour, and the parameter of starching behind the alkali refining is whiteness 77.9%, ash content 1.32%, alpha fibers content 96.03%.
6. a kind of method of producing dissolving pulp take Straw Pulp as raw material according to claim 1, the feature in its 5th step is: the material behind the alkali refining is sent to laundry to wash to send into behind the Water Extraction Machinery washing dehydration add the hydrogen peroxide pool specialized, add the hydrogen peroxide that accounts for total amount 5%, bleach for the third time, temperature regulating is 44 ℃-46 ℃, reaction time is 1.4-1.6 hour, the parameter of slurry is whiteness 81.1%, ash content 1.1%, alpha fibers content 97.19% after the bleaching for the third time, sends to laundry after the slurry after for the third time bleaching is filtered to obtain dissolving pulp after washing the Water Extraction Machinery washing dehydration.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343475A (en) * | 2013-07-16 | 2013-10-09 | 枣庄鸿润纸业有限公司 | Special puerpera paper and production process thereof |
| CN105111316A (en) * | 2015-09-24 | 2015-12-02 | 四川北方硝化棉股份有限公司 | Nitro-cotton and method for producing same |
| CN109629290A (en) * | 2018-12-25 | 2019-04-16 | 新疆富丽达纤维有限公司 | A kind of pulping production technology reducing dissolving pulp dosage |
| CN110093799A (en) * | 2019-05-09 | 2019-08-06 | 四川化工职业技术学院 | A kind of stalk fibre paper pulp, preparation method and applications |
| CN112726249A (en) * | 2020-12-29 | 2021-04-30 | 陕西科技大学 | Dissolving pulp prepared from corn straw skins and method |
| CN112779812A (en) * | 2020-12-31 | 2021-05-11 | 山东天和纸业有限公司 | Method for producing dissolving pulp from straw refined product |
-
2011
- 2011-08-09 CN CN 201110226823 patent/CN102926266A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343475A (en) * | 2013-07-16 | 2013-10-09 | 枣庄鸿润纸业有限公司 | Special puerpera paper and production process thereof |
| CN103343475B (en) * | 2013-07-16 | 2016-02-03 | 枣庄鸿润纸业有限公司 | A kind of special puerpera paper and production technology thereof |
| CN105111316A (en) * | 2015-09-24 | 2015-12-02 | 四川北方硝化棉股份有限公司 | Nitro-cotton and method for producing same |
| CN109629290A (en) * | 2018-12-25 | 2019-04-16 | 新疆富丽达纤维有限公司 | A kind of pulping production technology reducing dissolving pulp dosage |
| CN110093799A (en) * | 2019-05-09 | 2019-08-06 | 四川化工职业技术学院 | A kind of stalk fibre paper pulp, preparation method and applications |
| CN112726249A (en) * | 2020-12-29 | 2021-04-30 | 陕西科技大学 | Dissolving pulp prepared from corn straw skins and method |
| CN112779812A (en) * | 2020-12-31 | 2021-05-11 | 山东天和纸业有限公司 | Method for producing dissolving pulp from straw refined product |
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Application publication date: 20130213 |