WO2017058057A1 - Способ повышения качества и реакционной способности целлюлозы - Google Patents
Способ повышения качества и реакционной способности целлюлозы Download PDFInfo
- Publication number
- WO2017058057A1 WO2017058057A1 PCT/RU2016/000644 RU2016000644W WO2017058057A1 WO 2017058057 A1 WO2017058057 A1 WO 2017058057A1 RU 2016000644 W RU2016000644 W RU 2016000644W WO 2017058057 A1 WO2017058057 A1 WO 2017058057A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cellulose
- vacuum
- hydrolysis
- hydrolysis solution
- reactivity
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/02—Rendering cellulose suitable for esterification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/006—Preparation of cuprammonium cellulose solutions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/08—Fractionation of cellulose, e.g. separation of cellulose crystallites
Definitions
- the invention relates to the production of celluloses with enhanced reactivity and quality, and can be used in their chemical processing, including finished batches, to produce nitrocellulose and other products.
- Cellulose has a structure that consists of crystalline and amorphous parts. As a result, the lack of pre-treatment of cellulose, the replacement of hydroxyl groups located in the crystalline parts, is difficult.
- the need for additional activation of cellulose, including ready-made batches, is associated with a rather low content of their indicators and, in particular, in the content of ⁇ -cellulose for wood, flax pulp is 93-95%, while the lignin content in the finished batches of cellulose reaches 2.5-4.5%.
- the content of a-cellulose in lint cotton pulp reaches 98%.
- the quality of cellulose is determined by the properties of the feedstock and the technology of processing cellulose-containing raw materials into cellulose. Fluctuations in the technological parameters of the processes of cooking, bleaching, washing and instrumentation of the processes affect the output characteristics of the batches of pulp produced in factories.
- Improving the output parameters of cellulose is important not only to improve their quality, but also cellulose nitrates produced on its basis and, accordingly, gunpowder, varnishes and enamels and other materials.
- Activating agents are usually used simultaneously with substitute compounds and are solutions of hydroxides, such as metal hydroxides (e.g. sodium hydroxide), ammonia, amines, dimethylformamides, dimethyl sulfoxides, acetic acid.
- hydroxides such as metal hydroxides (e.g. sodium hydroxide), ammonia, amines, dimethylformamides, dimethyl sulfoxides, acetic acid.
- Sodium hydroxide is most often used as an activating agent.
- One of the methods for activating cellulose for various types of processing is a method for activating cellulose (USSR author's certificate N ° 335954 IPC ⁇ 08 ⁇ 1/00 with priority dated 07/21/1969), based on the treatment of cellulose with water, followed by displacement with a displacing reagent, such as acetic acid, moreover, the displacement of water is carried out in vacuum by vapors of the displacing reagent.
- the activation of cellulose is achieved by filling with an agent that causes swelling of the cellulose, ultramicroscopic spaces between the crystalline sections of the cellulose and the subsequent displacement of this agent with an organic solvent or its vapors.
- an agent that causes swelling of the cellulose, ultramicroscopic spaces between the crystalline sections of the cellulose and the subsequent displacement of this agent with an organic solvent or its vapors As a result of this treatment, the pulp chains are not densified, i.e. the active surface of cellulose increases and its availability in subsequent chemical processing.
- the main disadvantage of this method is the high consumption of displacing reagent. So, when displacing water from the swollen cellulose with acetic acid, at least a hundred times the amount of glacial acetic acid is required by weight of the cellulose.
- the disadvantage of this method is the relatively high consumption of the displacing reagent, which leads to an increase in the cost of the process.
- treatment of cellulose with anhydride of carbonic, sulfuric or acetic acids at elevated pressure can create an explosive and fire hazard situation.
- a method for producing reactive cellulose was selected (RF patent Jfe 2202558 (p. 5) IPC ⁇ 08 ⁇ 1 / 00, ⁇ 08 ⁇ 1 / 02, ⁇ 08 ⁇ 1 / 06 with priority dated 04/03/1998).
- the method includes the following steps: activation of cellulose by treatment with an activating agent, partial removal of the activating agent until its residual mass content is lower than 10 wt.%, Introduction of the activated cellulose obtained above into reaction with an organic compound or carbon disulfide, possible removal of the remainder of the activating agent and by-products of the substitution reaction .
- the disadvantage of this method of producing reactive cellulose is the use of additional chemicals that require subsequent removal and increase the duration of the process due to purification, as well as deterioration in the quality of cellulose due to incomplete removal of the used organic compounds.
- the aim of the invention is to improve the quality indicators of the manufactured pulp, including those characterizing its reactivity, while accelerating the activation process.
- the goal is achieved by the fact that in the method of improving the quality and reactivity of cellulose by activating, according to the invention, the activation of cellulose includes the following stages of exposure to cellulose: impregnation and hydrolysis of cellulose in a hydrolysis solution medium, filtering cellulose from the hydrolysis solution, washing, spinning and drying, moreover, the stages of impregnation and hydrolysis of cellulose in the medium of the hydrolysis solution, filtration from the hydrolysis solution, washing, spinning and drying are carried out simultaneously with a thermal vacuum pulse exposure to cycles, each of which includes heating cellulose to a temperature of not more than 115 ° C, high-speed pulsed exposure to vacuum within a pressure range of not more than 100 mm Hg. Art. in less than 10 seconds, followed by exposure of the pulp to a vacuum and vacuum discharge.
- the activation of the cellulosic material supplied from the pulp mill is carried out after releasing it from the wrapping material, followed by breaking in the hydrolysis solution during the impregnation and hydrolysis.
- the cellulose is preliminarily dried to a moisture content of not more than 12%.
- High-speed pulsed vacuum can be produced from a receiver with a quick-acting valve.
- the receiver in turn, must be connected to a vacuum source (vacuum pump).
- the goal is achieved due to the fact that the steps of activating cellulose (impregnation, hydrolysis, filtration, washing, filtering, drying) are carried out using thermal vacuum pulsed actions in these modes.
- steps of activating cellulose impregnation, hydrolysis, filtration, washing, filtering, drying
- thermal vacuum pulsed actions During pulsed evacuation of heated cellulose, sorbed gases are removed from the surface of the cellulose and its capillaries, and when cellulose is impregnated with a hydrolyzing solution, the wettability of cellulose increases and its degree of impregnation increases in volume cellulose. This also makes it possible to impregnate the finished pulp when it arrives at the plant after it is released from the wrapping material.
- a thermal vacuum-pulsed effect a moisture content of less than 12% is achieved and the cellulose capillaries do not slam.
- a hydrolysis solution with intensive boiling in vacuum achieves a more complete dissolution of lignin, pectin, resins and other compounds contained in cellulose, in which the content of ⁇ -cellulose increases, which frees up ultramicroscopic spaces between crystalline regions and increases its reactivity.
- the proposed method of cellulose activation can be implemented either at the cellulose manufacturer at the end of the technological process, or before the subsequent use of the finished pulp.
- the activation method of the finished pulp is as follows.
- the finished cellulosic material is placed in the cooking apparatus (hydrolyzer) and is subjected to the following technological processes in succession: drying to a moisture content of not more than 12% (if necessary), impregnation and hydrolysis in the hydrolysis solution medium, cellulose filtration from the hydrolysis solution, cellulose washing after hydrolysis, subsequent extraction and drying.
- the indicated technological processes of impregnation and hydrolysis of cellulose in a hydrolysis solution medium, filtration of cellulose from a hydrolysis solution, washing after hydrolysis, extraction and drying are carried out with the use of thermal vacuum pulsed cycles, including heating the cellulose to a temperature of not more than 115 ° C, high-speed pulse evacuation of the cooking apparatus with cellulose loaded into it, for a time of less than 10 seconds to a pressure of not more than 100 mm RT.
- thermal vacuum pulsed cycles including heating the cellulose to a temperature of not more than 115 ° C, high-speed pulse evacuation of the cooking apparatus with cellulose loaded into it, for a time of less than 10 seconds to a pressure of not more than 100 mm RT.
- High-speed pulse exposure to vacuum is carried out from a vacuum source - a vacuum receiver through a high-speed valve. Provides a vacuum in the receiver connected to it a vacuum pump.
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Analytical Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018515789A JP2018529819A (ja) | 2015-09-28 | 2016-09-27 | セルロースの品質及び反応性を改善する方法 |
US15/763,459 US20180291118A1 (en) | 2015-09-28 | 2016-09-27 | Method for improving quality and reactivity of cellulose |
CN201680062346.1A CN108350088A (zh) | 2015-09-28 | 2016-09-27 | 提高纤维素的质量和反应活性的方法 |
KR1020187012163A KR20180075534A (ko) | 2015-09-28 | 2016-09-27 | 셀룰로스의 품질 및 반응성을 개선시키기 위한 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2015141106 | 2015-09-28 | ||
RU2015141106A RU2609803C1 (ru) | 2015-09-28 | 2015-09-28 | Способ повышения качества и реакционной способности целлюлозы |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017058057A1 true WO2017058057A1 (ru) | 2017-04-06 |
Family
ID=58423939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2016/000644 WO2017058057A1 (ru) | 2015-09-28 | 2016-09-27 | Способ повышения качества и реакционной способности целлюлозы |
Country Status (6)
Country | Link |
---|---|
US (1) | US20180291118A1 (ru) |
JP (1) | JP2018529819A (ru) |
KR (1) | KR20180075534A (ru) |
CN (1) | CN108350088A (ru) |
RU (1) | RU2609803C1 (ru) |
WO (1) | WO2017058057A1 (ru) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2684020C1 (ru) * | 2018-05-30 | 2019-04-03 | Юрий Петрович Келлер | Способ активации целлюлозы методом парового взрыва в щелочной среде |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU952852A1 (ru) * | 1981-02-19 | 1982-08-23 | Ордена Трудового Красного Знамени Институт Химии Древесины Ан Латвсср | Способ активации целлюлозы |
WO1993025584A2 (en) * | 1992-06-11 | 1993-12-23 | Eastman Kodak Co | Process for activation of cellulose |
RU2202558C2 (ru) * | 1997-04-25 | 2003-04-20 | Родиа Ацетов | Реакционноспособная целлюлоза и способ ее получения |
RU2448118C1 (ru) * | 2010-11-09 | 2012-04-20 | Учреждение Российской академии наук Институт проблем химико-энергетических технологий Сибирского отделения РАН (ИПХЭТ СО РАН) | Способ получения целлюлозы из недревесного растительного сырья с содержанием нативной целлюлозы не более 50% и способ получения из нее карбоксиметилцеллюлозы |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE533805A (ru) * | 1954-02-08 | |||
US4018908A (en) * | 1972-01-28 | 1977-04-19 | Gross George E | Vacuum treatment to remove vaporized liquid from unfrozen cellular substances while keeping the cell walls thereof intact |
SU1437369A1 (ru) * | 1985-06-24 | 1988-11-15 | Институт химии древесины АН ЛатвССР | Способ активации целлюлозы |
US5461108A (en) * | 1993-08-31 | 1995-10-24 | Polymer Wood Processors, Inc. | Preservation of wood with phenol formaldehyde resorcinol resins |
WO2004106624A1 (en) * | 2003-06-03 | 2004-12-09 | Pacific Pulp Resources Inc. | Method for producing pulp and lignin |
RU2456394C1 (ru) * | 2010-12-08 | 2012-07-20 | Федеральное государственное бюджетное учреждение науки Институт проблем химико-энергетических технологий Сибирского отделения Российской академии наук (ИПХЭТ СО РАН) | Способ переработки целлюлозосодержащего сырья |
-
2015
- 2015-09-28 RU RU2015141106A patent/RU2609803C1/ru active
-
2016
- 2016-09-27 JP JP2018515789A patent/JP2018529819A/ja active Pending
- 2016-09-27 WO PCT/RU2016/000644 patent/WO2017058057A1/ru active Application Filing
- 2016-09-27 US US15/763,459 patent/US20180291118A1/en not_active Abandoned
- 2016-09-27 CN CN201680062346.1A patent/CN108350088A/zh active Pending
- 2016-09-27 KR KR1020187012163A patent/KR20180075534A/ko unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU952852A1 (ru) * | 1981-02-19 | 1982-08-23 | Ордена Трудового Красного Знамени Институт Химии Древесины Ан Латвсср | Способ активации целлюлозы |
WO1993025584A2 (en) * | 1992-06-11 | 1993-12-23 | Eastman Kodak Co | Process for activation of cellulose |
RU2202558C2 (ru) * | 1997-04-25 | 2003-04-20 | Родиа Ацетов | Реакционноспособная целлюлоза и способ ее получения |
RU2448118C1 (ru) * | 2010-11-09 | 2012-04-20 | Учреждение Российской академии наук Институт проблем химико-энергетических технологий Сибирского отделения РАН (ИПХЭТ СО РАН) | Способ получения целлюлозы из недревесного растительного сырья с содержанием нативной целлюлозы не более 50% и способ получения из нее карбоксиметилцеллюлозы |
Also Published As
Publication number | Publication date |
---|---|
RU2609803C1 (ru) | 2017-02-06 |
CN108350088A (zh) | 2018-07-31 |
JP2018529819A (ja) | 2018-10-11 |
KR20180075534A (ko) | 2018-07-04 |
US20180291118A1 (en) | 2018-10-11 |
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