CN103319611B - Production process of 2000s/v nitrocotton - Google Patents
Production process of 2000s/v nitrocotton Download PDFInfo
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- CN103319611B CN103319611B CN201310261996.7A CN201310261996A CN103319611B CN 103319611 B CN103319611 B CN 103319611B CN 201310261996 A CN201310261996 A CN 201310261996A CN 103319611 B CN103319611 B CN 103319611B
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Abstract
The invention relates to a production process of nitrocotton, and particularly relates to a production process of 2000s/v nitrocotton. The production process comprises the following steps of: under the heating of hot air, conveying refined cotton into a nitrating chamber, nitrating the refined cotton into the nitrocotton for washing, carrying out boiling after washing, conveying the water-contained nitrocotton into a centrifugal machine for dewatering by a cotton conveying pump after the nitrocotton is boiled, conveying the nitrocotton into a wine cotton groove by the discharging port of the centrifugal machine, carrying out stirring and alcoholizing, after the nitrocotton is alcoholized, conveying the nitrocotton into a horizontal type centrifugal defibering and alcoholizing machine, carrying out refined wine replacement for removing water, collecting the nitrocotton prepared in the step and carrying out conventional package. Compared with the traditional nitrocotton, the production process has the advantages that the viscosity of the prepared nitrocotton measured by a falling-ball method reaches more than 2000 seconds, the wide application in binding agents of electronic products can be achieved, and the defect without the technology in China is made up.
Description
Technical field
The present invention relates to nitro-cotton production technique, be specifically related to the production technique of a kind of 2000 seconds degree nitro-cottons.
Background technology
Nitro-cotton is white or micro-yellow flocculence, can be dissolved in acetone.Formal name used at school cellulose nitrate, is once called as nitrocotton, nitro-cotton.NC is a polymkeric substance.Its molecular weight is very large.Its molecular formula is C6H7O2 (ONO2) a (OH) 3-an, and wherein a is gamma value, and n is the polymerization degree.Degree of esterification is represented traditionally with nitrogen content percentage ratio.Nitro-cotton has high flammability and explosivity, and its hazard level is determined according to degree of nitration, and the nitro-cotton of nitrogen content more than 12.5% is greatly dangerous, meets fire and namely burns.Can be accelerated it decompose and spontaneous combustion when temperature is more than 40 DEG C.Although the nitro-cotton of nitrogen content less than 12.5% is more stable, is heated or stores with the passing of time, decompose gradually and release acid, reducing point of ignition, also have the possibility of self-firing and self-explosion.
About family more than ten of domestic nitro-cotton manufacturer, and production viscosity is more than 2000 seconds.Domestic at present also do not have.Along with domestic electronic product high speed development, and the nitro-cotton of viscosity more than 2000 seconds is promoted by electron production producer just rapidly as the binding agent of electronic product.Prior art selects the high purified cotton of viscosity can improve the viscosity of nitro-cotton usually.So far, the domestic nitro-cotton product also not having other producers can produce 2000 seconds degree, although can the physical and chemical index of fertile product as all conformance with standard such as degree of nitrification, stability, but but can not ensure its 2000 seconds degree viscosity indexes, this is the technical difficult problem to be solved such as during current nitro-cotton is produced.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes the production technique of a kind of 2000 seconds degree nitro-cottons, record viscosity through falling ball method and reaching more than 2000 seconds.
In order to reach foregoing invention object, the present invention proposes following technical scheme:
The production technique of 2000 seconds degree nitro-cottons, specifically see following steps:
1. purified cotton is under the heating of hot blast, is transported to nitrated room;
2. purified cotton carries out nitrated in nitrated indoor acid, room temperature reaction 15-25 minute;
3. purified cotton is after nitrated, becoming nitro-cotton to wash, rinsing to can't smell tart flavour with clear water;
4., after nitro-cotton washing, carry out boiling washing, nitro-cotton is carried out 5 minutes low temperature 2.5Mpa high pressure steam and boil and wash;
5., after nitro-cotton boils and washes, dewater in moisture nitro-cotton feeding whizzer with cotton transport pump;
6., after nitro-cotton dehydration, the discharge port of whizzer is delivered to nitro-cotton in cotton groove, carries out stirring, refining;
7. after nitro-cotton alcoholization, be transported in horizontal centrifugal defibering alcoholization machine with transferpump, carry out smart wine displacement expelling water;
8. collect the obtained nitro-cotton of upper step and carry out routine packaging.
The production technique of 2000 seconds described degree nitro-cottons, the 2. the acid described in step be concentrated nitric acid and vitriol oil mixed solution, concentrated nitric acid: the vitriol oil=1:3-4.
The production technique of 2000 seconds described degree nitro-cottons, the 5. in step nitro-cotton dehydration after nitro-cotton water content be less than 30%.
The production technique of 2000 seconds described degree nitro-cottons, the 6. in step in cotton groove alcohol configuration concentration be 75-80%, nitro-cotton and alcohol ratio are 7:93, and the alcoholization time is 3-5 minute, cotton groove liquid level 75-80%, refine complete, the moisture 2-3% of nitro-cotton.
Advantage of the present invention is compared with traditional nitro-cotton, and the present invention obtains nitro-cotton and records viscosity through falling ball method and reach more than 2000 seconds, can be widely used in the application of the binding agent of electronic product, compensate for the domestic shortcoming not having this technology.
Embodiment
The production technique of 2000 seconds degree nitro-cottons, specifically see following steps:
1. purified cotton is under the heating of hot blast, is transported to nitrated room;
2. purified cotton carries out nitrated in nitrated indoor acid, room temperature reaction 15-25 minute, and acid is concentrated nitric acid and vitriol oil mixed solution, concentrated nitric acid: the vitriol oil=1:3-4;
3. purified cotton is after nitrated, becoming nitro-cotton to wash, rinsing to can't smell tart flavour with clear water;
4., after nitro-cotton washing, carry out boiling washing, nitro-cotton is carried out 5 minutes low temperature 2.5Mpa high pressure steam and boil and wash;
5., after nitro-cotton boils and washes, dewater in moisture nitro-cotton feeding whizzer with cotton transport pump, after the dehydration of nitro-cotton, nitro-cotton water content is less than 30%;
6. after nitro-cotton dehydration, the discharge port of whizzer is delivered to nitro-cotton in cotton groove, carry out stirring, refining, in cotton groove, alcohol configuration concentration is 75-80%, nitro-cotton and alcohol ratio are 7:93, and the alcoholization time is 3-5 minute, cotton groove liquid level 75-80%, refine complete, the moisture 2-3% of nitro-cotton;
7. after nitro-cotton alcoholization, be transported in horizontal centrifugal defibering alcoholization machine with transferpump, carry out smart wine displacement expelling water;
8. collect the obtained nitro-cotton of upper step and carry out routine packaging.
Claims (1)
- The production technique of 1.2000 seconds degree nitro-cottons, is characterized in that following steps:1) purified cotton is under the heating of hot blast, is transported to nitrated room;2) purified cotton carries out nitrated in nitrated indoor acid, room temperature reaction 15-25 minute;3) purified cotton is after nitrated, becoming nitro-cotton to wash, rinsing to can't smell tart flavour with clear water;4), after nitro-cotton washing, carry out boiling washing, nitro-cotton is carried out 5 minutes low temperature 2.5Mpa high pressure steam and boil and wash;5), after nitro-cotton boils and washes, dewater in moisture nitro-cotton feeding whizzer with cotton transport pump;6), after nitro-cotton dehydration, the discharge port of whizzer is delivered to nitro-cotton in cotton groove, carries out stirring, refining;7) after nitro-cotton alcoholization, be transported to horizontal centrifuge with transferpump and discongest in alcoholization machine, carry out smart wine displacement expelling water;8) nitro-cotton that in collection, step is obtained carries out routine packaging;2nd) acid described in step is concentrated nitric acid and vitriol oil mixed solution, concentrated nitric acid: the vitriol oil=1:3-4; 5th) in step nitro-cotton dehydration after nitro-cotton water content be less than 30%; 6th) in step, in cotton groove, alcohol configuration concentration is 75-80%, and nitro-cotton and alcohol ratio are 7:93, and the alcoholization time is 3-5 minute, and cotton groove liquid level 75-80% refines complete, the moisture 2-3% of nitro-cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310261996.7A CN103319611B (en) | 2013-06-27 | 2013-06-27 | Production process of 2000s/v nitrocotton |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310261996.7A CN103319611B (en) | 2013-06-27 | 2013-06-27 | Production process of 2000s/v nitrocotton |
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| CN103319611A CN103319611A (en) | 2013-09-25 |
| CN103319611B true CN103319611B (en) | 2015-06-24 |
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| CN201310261996.7A Active CN103319611B (en) | 2013-06-27 | 2013-06-27 | Production process of 2000s/v nitrocotton |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106188312A (en) * | 2016-07-19 | 2016-12-07 | 南通泰利达化工有限公司 | A kind of production technology of 300 seconds degree nitrocottons |
| CN109627358B (en) * | 2018-12-26 | 2021-05-25 | 西北大学 | Preparation method and application of nitrated chitosan |
| CN111763265A (en) * | 2020-07-14 | 2020-10-13 | 北京理工大学 | Method for refining nitration bamboo cellulose crude product |
| CN112321725B (en) * | 2020-11-24 | 2022-11-18 | 北方化学工业股份有限公司 | Production method of 10000 second-degree nitrocotton |
| CN112321727B (en) * | 2020-11-25 | 2022-10-04 | 北方化学工业股份有限公司 | Water-removing method for energy-containing nitrocotton |
| CN112500501A (en) * | 2020-11-25 | 2021-03-16 | 北方化学工业股份有限公司 | Method for removing water from low-moisture nitrocotton |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436793A (en) * | 2003-03-21 | 2003-08-20 | 泸州北方化学工业有限公司 | Continuous nitrocotton dewatering process and apparatus |
| CN102219862A (en) * | 2011-05-30 | 2011-10-19 | 四川北方硝化棉股份有限公司 | Method for preparing superhigh-viscosity energy-containing cellulose nitrate |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436793A (en) * | 2003-03-21 | 2003-08-20 | 泸州北方化学工业有限公司 | Continuous nitrocotton dewatering process and apparatus |
| CN102219862A (en) * | 2011-05-30 | 2011-10-19 | 四川北方硝化棉股份有限公司 | Method for preparing superhigh-viscosity energy-containing cellulose nitrate |
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| CN103319611A (en) | 2013-09-25 |
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