WO2006081955A1 - Verfahren zur formgebung von celluloseethern - Google Patents
Verfahren zur formgebung von celluloseethern Download PDFInfo
- Publication number
- WO2006081955A1 WO2006081955A1 PCT/EP2006/000528 EP2006000528W WO2006081955A1 WO 2006081955 A1 WO2006081955 A1 WO 2006081955A1 EP 2006000528 W EP2006000528 W EP 2006000528W WO 2006081955 A1 WO2006081955 A1 WO 2006081955A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cellulose ethers
- cellulose ether
- holes
- product
- cellulose
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B11/00—Preparation of cellulose ethers
- C08B11/02—Alkyl or cycloalkyl ethers
- C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
- C08B11/10—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
- C08B11/12—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals substituted with carboxylic radicals, e.g. carboxymethylcellulose [CMC]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B11/00—Preparation of cellulose ethers
- C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
- C08J2301/26—Cellulose ethers
Definitions
- the present invention relates to a process for the preparation of cellulose ethers having a higher bulk density and a narrower particle size distribution compared to known cellulose ethers, by forcing the cellulose ethers through a perforated plate.
- the shaping step represents an important process step for influencing the properties of the product.
- quality parameters such as the grading curve and bulk density are influenced in this step.
- This process step is usually carried out after product washing and before drying and grinding.
- shaping takes place by the buildup agglomeration in horizontal litter mixers, in which the moist product is agglomerated, compacted and compacted (see, for example, DE 20 28 310, DE 33 08 420 A1).
- the cellulose ether is passed into an apparatus in which an axis is arranged vertically.
- a fixed plate On the axis of a fixed plate (plate), which has holes with a defined ratio of diameter to length attached.
- On this plate run roles (Koller, wheels, rollers), which press the cellulose ether in the holes, whereby this is forced promoted.
- Below the plate the cellulose ether is separated by rotating scrapers and thereby divided into small pellets.
- a further embodiment of the invention in a flat die press, in which the circumferential Koller (wheels), based on a comparison with holes provided for die (plate) run, the cellulose ether is forced through the holes of the die. Underneath the die is a shearing device to bring the pellets to the desired length. At least one Koller runs in the pug mill. Usual are two Koller; but it can also be more than two Koller. This depends on the size of the unit and the diameter of the Koller.
- the cellulose ether is compressed as it passes through the holes.
- About the geometry of the holes can be set the degree of compression. This regulates the necessary energy for the compression process.
- the cross-sectional shape of the moldings is determined by the shape of the hole cross-section.
- the consistency of the densified cellulose ether depends on circular holes from the press ratio P from.
- P is defined as the ratio of the length of the hole to the diameter of the hole in the die.
- the pressing ratio P should be between 0.5 and 5.0, preferably between 2 and 4.0.
- the holes have a square, rectangular, oval or irregular shaped cross-section.
- the number of holes per unit area of the plate depends on the stability of the plate.
- Suitable cellulose ethers for carrying out the process according to the invention are, for example, ionic and nonionic cellulose ethers.
- ionic are, for example, to call
- Carboxymethylcellulose hydroxyethylcarboxymethylcellulose, carboxymethylsulfoethylcellulose and sulfoethylcellulose, preferably carboxymethylcellulose.
- examples which may be mentioned as nonionic are hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, ethylhydroxyethylcellulose, methylcellulose, preferably hydroxyethylmethylcellulose and hydroxypropylmethylcellulose.
- the cellulose ethers compacted by the process according to the invention have a higher bulk density with otherwise identical properties and form more stable granules than according to the prior art the art-treated cellulose ether.
- Typical bulk densities for the commercially valuable cellulose ethers compacted by the process according to the invention are from 400 g / l to 800 g / l.
- Typical particle size distributions of these cellulose ethers are from 125 ⁇ m to 1000 ⁇ m with an average particle size of 500 ⁇ m.
- the uncompressed material is added to the muller thread via a dosing device (eg screw, belt). It is also possible to render the pug mill inert, for example with nitrogen or carbon dioxide.
- a dosing device eg screw, belt
- the pug mill inert for example with nitrogen or carbon dioxide.
- Product CMC CRT 40000 (degree of substitution (DS) 0.9, product moisture 42%, viscosity of a 2% aqueous solution 40000 mP-s) is introduced as the fibrous, de-alcoholized drive in a horizontal mixer and continuously granulated.
- the granulate obtained is dried and subsequently milled in a batch apparatus' in a hammer mill with a screen basket to the required fineness.
- the product is screened off above 1 mm.
- Example 1 (according to the invention):
- Bulk density 711 g / l; Proportions less than 0.125 mm: 14% by weight, K 0.995
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Crushing And Grinding (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007553497A JP2008528773A (ja) | 2005-02-03 | 2006-01-21 | セルロースエーテルの成形方法 |
BRPI0605928-7A BRPI0605928A2 (pt) | 2005-02-03 | 2006-01-21 | processo para a moldagem de éteres de celulose |
CN2006800010257A CN101039961B (zh) | 2005-02-03 | 2006-01-21 | 纤维素醚的成形方法 |
EP06703567A EP1846456A1 (de) | 2005-02-03 | 2006-01-21 | Verfahren zur formgebung von celluloseethern |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005004893.5 | 2005-02-03 | ||
DE102005004893A DE102005004893B4 (de) | 2005-02-03 | 2005-02-03 | Verfahren zur Formgebung von Celluloseethern |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006081955A1 true WO2006081955A1 (de) | 2006-08-10 |
Family
ID=36061388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/000528 WO2006081955A1 (de) | 2005-02-03 | 2006-01-21 | Verfahren zur formgebung von celluloseethern |
Country Status (8)
Country | Link |
---|---|
US (1) | US20060205935A1 (de) |
EP (1) | EP1846456A1 (de) |
JP (1) | JP2008528773A (de) |
KR (1) | KR20070101236A (de) |
CN (1) | CN101039961B (de) |
BR (1) | BRPI0605928A2 (de) |
DE (1) | DE102005004893B4 (de) |
WO (1) | WO2006081955A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012522122A (ja) * | 2009-03-31 | 2012-09-20 | ダウ グローバル テクノロジーズ エルエルシー | 改良された性質を有するカルボキシメチルセルロース |
MX2016013830A (es) * | 2015-10-27 | 2017-05-10 | Shinetsu Chemical Co | Eter de celulosa porosa no ionico soluble en agua que tiene excelente solubilidad y metodo para producir el mismo. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1404986A1 (de) * | 1960-11-07 | 1969-07-31 | Rayonier Inc | Alkaliloesliche Hydroxyaethylcellulose in gekoernter Form |
DE2410789B1 (de) * | 1974-03-07 | 1975-09-11 | Hoechst Ag, 6000 Frankfurt | Verfahren zum Kaltmahlen von Cellulosederivaten |
DE3308420A1 (de) * | 1983-03-09 | 1984-09-13 | Wolff Walsrode Ag, 3030 Walsrode | Verfahren zur kontinuierlichen granulierung von carboxymethylcellulose |
EP0374867A1 (de) * | 1988-12-22 | 1990-06-27 | Hoechst Aktiengesellschaft | Verfahren zur Herstellung eines lagerstabilen, leicht löslichen Bleichaktivator-Granulats |
WO2000052058A1 (de) * | 1999-03-03 | 2000-09-08 | Wolff Walsrode Ag | Verfahren zur herstellung verdichteter rieselfähiger lackrohstoffe |
EP1127895A1 (de) * | 2000-02-28 | 2001-08-29 | Wolff Walsrode AG | Verfahren zur Herstellung von pulverförmigen wasserlöslichen Cellulosederivaten |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2038310C3 (de) * | 1970-08-01 | 1982-04-01 | Henkel KGaA, 4000 Düsseldorf | Verfahren und Vorrichtung zur kontinuierlichen Herstellung reiner und trockener Carboxymethylcellulose |
DE3038001A1 (de) * | 1980-10-08 | 1982-05-06 | Henkel KGaA, 4000 Düsseldorf | Verfahren zur herstellung von mikropulvern aus celluloseether oder cellulose |
US5488104A (en) * | 1994-06-30 | 1996-01-30 | The Dow Chemical Company | Process for comminuting cellulose ethers |
DE19637082A1 (de) * | 1996-09-12 | 1998-03-19 | Boehringer Mannheim Gmbh | Schnellzerfallende Pellets |
-
2005
- 2005-02-03 DE DE102005004893A patent/DE102005004893B4/de not_active Revoked
-
2006
- 2006-01-21 WO PCT/EP2006/000528 patent/WO2006081955A1/de active Application Filing
- 2006-01-21 BR BRPI0605928-7A patent/BRPI0605928A2/pt not_active IP Right Cessation
- 2006-01-21 CN CN2006800010257A patent/CN101039961B/zh not_active Expired - Fee Related
- 2006-01-21 JP JP2007553497A patent/JP2008528773A/ja active Pending
- 2006-01-21 EP EP06703567A patent/EP1846456A1/de not_active Withdrawn
- 2006-01-21 KR KR1020077009371A patent/KR20070101236A/ko not_active Application Discontinuation
- 2006-01-30 US US11/342,992 patent/US20060205935A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1404986A1 (de) * | 1960-11-07 | 1969-07-31 | Rayonier Inc | Alkaliloesliche Hydroxyaethylcellulose in gekoernter Form |
DE2410789B1 (de) * | 1974-03-07 | 1975-09-11 | Hoechst Ag, 6000 Frankfurt | Verfahren zum Kaltmahlen von Cellulosederivaten |
DE3308420A1 (de) * | 1983-03-09 | 1984-09-13 | Wolff Walsrode Ag, 3030 Walsrode | Verfahren zur kontinuierlichen granulierung von carboxymethylcellulose |
EP0374867A1 (de) * | 1988-12-22 | 1990-06-27 | Hoechst Aktiengesellschaft | Verfahren zur Herstellung eines lagerstabilen, leicht löslichen Bleichaktivator-Granulats |
WO2000052058A1 (de) * | 1999-03-03 | 2000-09-08 | Wolff Walsrode Ag | Verfahren zur herstellung verdichteter rieselfähiger lackrohstoffe |
EP1127895A1 (de) * | 2000-02-28 | 2001-08-29 | Wolff Walsrode AG | Verfahren zur Herstellung von pulverförmigen wasserlöslichen Cellulosederivaten |
Also Published As
Publication number | Publication date |
---|---|
DE102005004893B4 (de) | 2011-02-10 |
US20060205935A1 (en) | 2006-09-14 |
CN101039961B (zh) | 2010-08-18 |
EP1846456A1 (de) | 2007-10-24 |
JP2008528773A (ja) | 2008-07-31 |
KR20070101236A (ko) | 2007-10-16 |
CN101039961A (zh) | 2007-09-19 |
DE102005004893A1 (de) | 2006-08-10 |
BRPI0605928A2 (pt) | 2009-05-26 |
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