CN103317612A - Cellulose wet grinding production method - Google Patents
Cellulose wet grinding production method Download PDFInfo
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- CN103317612A CN103317612A CN2013102378335A CN201310237833A CN103317612A CN 103317612 A CN103317612 A CN 103317612A CN 2013102378335 A CN2013102378335 A CN 2013102378335A CN 201310237833 A CN201310237833 A CN 201310237833A CN 103317612 A CN103317612 A CN 103317612A
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Abstract
The invention discloses a cellulose wet grinding production method which mainly comprises the following steps of: directly pouring a wet cellulose material subjected to alkalization, etherification and neutralization reaction in a pulverizer, carrying out wet grinding, and filtering; and drying the wet cellulose material in an airflow dryer, and then packaging after treating. The cellulose wet grinding production method has the beneficial effects that because the cellulose material is ground in a wet state, dust is not generated in a grinding process, and environment protection is facilitated; the cellulose material is ground in the wet state, the energy consumption is low, tests prove that compared with the dry grinding, the wet grinding of the cellulose has the advantages that the electricity consumption is reduced by 125 kilowatt-hour per ton and the steam consumption is reduced by 0.6t, and therefore, the production processing cost of the cellulose can be greatly lowered on the whole.
Description
Technical field
The present invention relates to cellulose production processing technique field.
Background technology
Cellulose is a kind of polysaccharide that the occurring in nature distribution is the widest, content is maximum, accounts for more than 50% of plant kingdom's carbon content.Fiber crops, straw, straw, bagasse etc. all are cellulosic abundant sources.Cellulose is important paper making raw material.In addition, the product take cellulose as raw material also is widely used in the aspects such as plastics, explosive, electrician and Scientific Research Equipments.Cellulose in the food (being dietary fiber) also has important effect to the health of human body.Present known cellulose raw production. art mostly is first cellulose to be filtered, wet fiber element after filtering carries out drying through pneumatic drier to be processed, dry cellulosic after drying is processed enters pulverizer again and carries out pulverization process, and the cellulose after the pulverizing can be packed and dispatch from the factory.There is following major defect in this production technology: what pulverize in the disintegrating process step is dried cellulose, so the crushing process dust is many, contaminated environment; The energy consumption that needs when dry cellulose is pulverized in addition is high, increases production cost.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of energy-conserving and environment-protective, the broken production method of cellulose wet-milling that cost is low.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The broken production method of a kind of cellulose wet-milling, its key step is as follows:
(1) alkalization: aqueous isopropanol is added in the reactor, and drop into the alkali sheet, then cellulose substances is added in the reactor, vacuumize quaternization a period of time;
(2) etherificate: after quaternization finishes, in reactor, add oxirane take nitrogen as carrier, etherificate a period of time under the room temperature, then evenly be warming up to uniform temperature after, after constant temperature etherificate a period of time, uniform decrease in temperature to is decided to be temperature;
(3) neutralization: add acidic materials, neutralization reaction a period of time in the material after above-mentioned etherificate cooling;
(4) wet-milling is broken: directly pour pulverizer with above-mentioned into through the element of the wet fiber after neutralization reaction material, carry out wet-milling broken;
(5) filter: the wet fiber element material after above-mentioned process wet-milling is broken is poured filter into and is filtered;
(6) drying cartridge bag: the wet fiber element material after the above-mentioned process filtration is put into pneumatic drier carry out the drying processing, fill after being disposed and wrap.
A period of time in the described step (1) is 0.5～1.5 hour.
Ambient temperature in the described step (2) is 20～25 ℃, and the uniform temperature that evenly is warming up to is 70 ℃, and a period of time of constant temperature is 2～2.5 hours, and uniform decrease in temperature uniform temperature extremely is 30～40 ℃.
Acidic materials in the described step (3) are hydrochloric acid or acetic acid; A period of time of neutralization reaction is 20～30 minutes.
The broken production method of cellulose wet-milling of the present invention also comprises above-mentioned filtration step and wet pulverising step exchange order.
Beneficial effect of the present invention is as follows:
(1) because cellulose substances is to pulverize under the wet condition of undried, crushing process does not produce dust, is conducive to environmental protection;
(2) cellulose substances is pulverized under wet condition, energy consumption is low, obtains the wet comminution ratio dry grinding power consumption per ton of cellulose through test and reduces by 125 kilowatt hours, and steam consumption reduces by 0.6 ton, therefore, the method for the invention can reduce cellulosic production and processing cost on the whole greatly.
(3) in addition, it is broken that method of the present invention is carried out first wet-milling, and the material after the pulverizing enters pneumatic drier when dry again, and particle is trickle, can easier drying, and dry speed is also faster, can significantly reduce the energy consumption of pneumatic drier.
The specific embodiment
Embodiment 1
The broken production method of a kind of cellulose wet-milling, its concrete steps are as follows:
(1) alkalization: aqueous isopropanol is added in the reactor, and drop into the alkali sheet, then cellulose substances is added in the reactor, vacuumize quaternization 0.5～1.5 hour;
(2) etherificate: after quaternization finishes, in reactor, add oxirane take nitrogen as carrier, room temperature (20～25 ℃) lower etherificate a period of time, then evenly be warming up to 70 ℃, the constant temperature etherificate is after 2～2.5 hours, uniform decrease in temperature to 30～40 ℃;
(3) neutralization: add hydrochloric acid or acetic acid in the material after above-mentioned etherificate cooling, the pH value of control material is 5～7, neutralization reaction 20～30 minutes;
(4) wet-milling is broken: directly pour pulverizer with above-mentioned into through the element of the wet fiber after neutralization reaction material, carry out wet-milling broken;
(5) filter: the wet fiber element material after above-mentioned process wet-milling is broken is poured filter into and is filtered;
(6) drying cartridge bag: the wet fiber element material after the above-mentioned process filtration is put into pneumatic drier carry out the drying processing, fill after being disposed and wrap.
Embodiment 2
The broken production method of a kind of cellulose wet-milling, its concrete steps are as follows:
(1) alkalization: aqueous isopropanol is added in the reactor, and drop into the alkali sheet, then cellulose substances is added in the reactor, vacuumize quaternization 0.5～1.5 hour;
(2) etherificate: after quaternization finishes, in reactor, add oxirane take nitrogen as carrier, room temperature (20～25 ℃) lower etherificate a period of time, then evenly be warming up to 70 ℃, the constant temperature etherificate is after 2～2.5 hours, uniform decrease in temperature to 30～40 ℃;
(3) neutralization: add hydrochloric acid or acetic acid in the material after above-mentioned etherificate cooling, the pH value of control material is 5～7, neutralization reaction 20～30 minutes;
(4) filter: pour the wet fiber element material after the above-mentioned process neutralization reaction into filter and filter;
(5) wet-milling is broken: directly pour pulverizer with above-mentioned into through the element of the wet fiber after filtering material, carry out wet-milling broken;
(6) drying cartridge bag: the wet fiber element material after above-mentioned process wet-milling is broken is put into pneumatic drier and is carried out the drying processing, and dress wraps after being disposed.
Claims (8)
1. the broken production method of cellulose wet-milling is characterized in that, its method step is as follows:
(1) alkalization: aqueous isopropanol is added in the reactor, and drop into the alkali sheet, then cellulose substances is added in the reactor, vacuumize quaternization a period of time;
(2) etherificate: after quaternization finishes, in reactor, add oxirane take nitrogen as carrier, etherificate a period of time under the room temperature, then evenly be warming up to uniform temperature after, after constant temperature etherificate a period of time, uniform decrease in temperature to is decided to be temperature;
(3) neutralization: add acidic materials, neutralization reaction a period of time in the material after above-mentioned etherificate cooling;
(4) wet-milling is broken: directly pour pulverizer with above-mentioned into through the element of the wet fiber after neutralization reaction material, carry out wet-milling broken;
(5) filter: the wet fiber element material after above-mentioned process wet-milling is broken is poured filter into and is filtered;
(6) drying cartridge bag: the wet fiber element material after the above-mentioned process filtration is put into pneumatic drier carry out the drying processing, fill after being disposed and wrap.
2. the broken production method of cellulose wet-milling according to claim 1 is characterized in that, a period of time in the described step (1) is 0.5～1.5 hour.
3. the broken production method of cellulose wet-milling according to claim 1, it is characterized in that, the ambient temperature in the described step (2) is 20～25 ℃, and the uniform temperature that evenly is warming up to is 70 ℃, a period of time of constant temperature is 2～2.5 hours, and uniform decrease in temperature uniform temperature extremely is 30～40 ℃.
4. the broken production method of cellulose wet-milling according to claim 1 is characterized in that, the acidic materials in the described step (3) are hydrochloric acid or acetic acid; A period of time of neutralization reaction is 20～30 minutes.
5. the broken production method of cellulose wet-milling is characterized in that, its method step is as follows:
(1) alkalization: aqueous isopropanol is added in the reactor, and drop into the alkali sheet, then cellulose substances is added in the reactor, vacuumize quaternization a period of time;
(2) etherificate: after quaternization finishes, in reactor, add oxirane take nitrogen as carrier, etherificate a period of time under the room temperature, then evenly be warming up to uniform temperature after, after constant temperature etherificate a period of time, uniform decrease in temperature to is decided to be temperature;
(3) neutralization: add acidic materials, neutralization reaction a period of time in the material after above-mentioned etherificate cooling;
(4) filter: the wet fiber element material after above-mentioned process wet-milling is broken is poured filter into and is filtered;
(5) wet-milling is broken: directly pour pulverizer with above-mentioned into through the element of the wet fiber after neutralization reaction material, carry out wet-milling broken;
(6) drying cartridge bag: the wet fiber element material after the above-mentioned process filtration is put into pneumatic drier carry out the drying processing, fill after being disposed and wrap.
6. the broken production method of cellulose wet-milling according to claim 5 is characterized in that, a period of time in the described step (1) is 0.5～1.5 hour.
7. the broken production method of cellulose wet-milling according to claim 5, it is characterized in that, the ambient temperature in the described step (2) is 20～25 ℃, and the uniform temperature that evenly is warming up to is 70 ℃, a period of time of constant temperature is 2～2.5 hours, and uniform decrease in temperature uniform temperature extremely is 30～40 ℃.
8. the broken production method of cellulose wet-milling according to claim 5 is characterized in that, the acidic materials in the described step (3) are hydrochloric acid or acetic acid; A period of time of neutralization reaction is 20～30 minutes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519043A (en) * | 2016-11-19 | 2017-03-22 | 王芹 | Cellulose ether production technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260158A (en) * | 2008-04-14 | 2008-09-10 | 浙江中维药业有限公司 | Method for preparing hydroxypropylmethylcellulose |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260158A (en) * | 2008-04-14 | 2008-09-10 | 浙江中维药业有限公司 | Method for preparing hydroxypropylmethylcellulose |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519043A (en) * | 2016-11-19 | 2017-03-22 | 王芹 | Cellulose ether production technology |
| CN106519043B (en) * | 2016-11-19 | 2019-06-07 | 山东洲星生物技术有限公司 | A kind of production technology of cellulose ether |
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Application publication date: 20130925 |