WO1993024798A1 - Verfahren zur entwässerung von feinteiligen feststoffsuspensionen - Google Patents
Verfahren zur entwässerung von feinteiligen feststoffsuspensionen Download PDFInfo
- Publication number
- WO1993024798A1 WO1993024798A1 PCT/EP1993/001297 EP9301297W WO9324798A1 WO 1993024798 A1 WO1993024798 A1 WO 1993024798A1 EP 9301297 W EP9301297 W EP 9301297W WO 9324798 A1 WO9324798 A1 WO 9324798A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon atoms
- mixed ethers
- hydroxy mixed
- finely divided
- divided solid
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/005—Drying solid materials or objects by processes not involving the application of heat by dipping them into or mixing them with a chemical liquid, e.g. organic; chemical, e.g. organic, dewatering aids
Definitions
- the invention relates to a process for dewatering finely divided solid dispersions, in which internal hydroxy mixed ethers are used as auxiliaries.
- German Offenlegungsschrift DE-Al-39 18 274 discloses alkyl-end group-capped ⁇ -hydroxyalkyl ethers, so-called hydroxy mixed ethers, which are prepared by ring opening of alpha-olefin epoxides with fatty alcohol ethoxylates and are used as low-foam auxiliaries in the dewatering of solid suspensions. Although good results are obtained with these agents in solids dewatering, they have the disadvantage of unsatisfactory cold behavior. Especially when stored outdoors, crystals can form at temperatures of 15 to 20 ° C, which significantly impairs the pumping and flow behavior of these products and thus their intended use. The object of the invention was therefore to provide hydroxy mixed ethers which, with the same application performance, have improved low-temperature behavior.
- the invention relates to a process for dewatering finely divided solid suspensions, in which internal hydroxy mixed ethers of the formula (I) are used as auxiliaries,
- R 1 and R 2 independently of one another represent linear alkyl radicals having 1 to 17 carbon atoms, with the proviso that the sum of the carbon atoms of both radicals is 5 to 17,
- R 3 represents a linear or branched alkyl radical having 1 to 12 carbon atoms and n numbers from 1 to 20.
- Internal hydroxy mixed ethers can be prepared analogously to the terminal hydroxy mixed ethers by ring opening internal olefin epoxides with fatty alcohol ethoxylates or glycols. With regard to the details of the synthesis, reference is made to German Offenlegungsschrift DE-Al-37 23 323 (Henkel).
- Internal hydroxy mixed ethers which can be used in the context of the invention are ring opening products of internal olefin epoxides having 6 to 18 carbon atoms with ethylene glycol, diethylene glycol and its higher homologues, and addition products of on average 1 to 20 mol of ethylene oxide (EO) to 1 mol of a linear or branched primary alcohol with 1 to 12 carbon atoms.
- EO ethylene oxide
- Typical examples are ring opening products of technical internal C 10 -C 14 olefin epoxides with ethylene glycol, diethylene glycol, isopropyl alcohol-3EO, n-butanol-4EO, n-butanol-5E0, n-octanol-4E0 and n-decanol-10EO.
- the use of internal hydroxy mixed ethers of the formula (I) in which the sum of the carbon atoms in R 1 and R 2 is 9 to 13, R 3 for an alkyl radical with 3 to 8 carbon atoms and n for numbers 1 has proven to be particularly advantageous to 10. It should be pointed out that technical internal olefins always represent mixtures of different isomers and that the internal hydroxy mixed ethers to be used according to the invention therefore also include technical mixtures of the different positional isomers.
- the internal hydroxy mixed ethers of the formula (I) must be water-dispersible. It is possible that there is no satisfactory water dispersibility in those cases in which low values of the degree of ethoxylation are opposed by long-chain radicals R 1 , R 2 and / or R 3 . However, the required water dispersibility can be easily achieved by increasing the value of n within the above-mentioned range.
- the internal hydroxy mixed ethers to be used according to the invention can be used individually; for the dewatering of certain solids, however, it can be advantageous to combine products of different chain lengths or different degrees of ethoxylation with one another in order to exploit synergies in their physicochemical properties. In the same way, it can be advantageous to use combinations of the internal hydroxy mixed ethers with other already known ionic or nonionic drainage aids.
- the internal hydroxy mixed ethers to be used according to the invention support the dewatering of solid suspensions, are readily biodegradable and are characterized by low pour points. They are therefore suitable for dewatering suspensions of various solids, such as iron ore concentrates, quartz sand, hard coal or coke. Another important area of application is the use of the internal hydroxy mixed ethers to be used according to the invention as aids in the dewatering of solid suspensions which are used in waste paper processing, e.g. B. in the de-inking process or filler flotation.
- the internal hydroxy mixed ethers are used in amounts of 10 to 500, preferably 100 to 400 and in particular 150 to 250 g, based on solids content, per ton of solid.
- the hydroxy mixed ethers A to G are according to the invention and were produced on the basis of internal olefin epoxides.
- the chain length of the starting epoxide results from the sum of the carbon atoms (R 1 + R 2 + 1). Since the olefins used are technical-grade mixtures, the hydroxy mixed ethers according to the invention also represent mixtures of the various positional isomers.
- the product Z is a terminal hydroxy mixed ether based on an alpha-C13 / 14-01efine epoxide according to DE-Al-39 18 274 and is used for comparison.
- Quartz sand of the following grain size was used for the drainage tests:
- the tests were carried out in a cup centrifuge, with which centrifuge parameters from 15 to 2000 can be achieved.
- Perforated plates with sieve openings of 0.1 ⁇ 2 mm were used as the sieve covering.
- the drainage aids were used in aqueous solutions; all concentration data are based on the solids content of these solutions.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93912771A EP0642650A1 (de) | 1992-06-01 | 1993-05-24 | Verfahren zur entwässerung von feinteiligen feststoffsuspensionen |
US08/347,324 US5545332A (en) | 1992-06-01 | 1993-05-24 | Process for dewatering fine-particle solids suspensions |
FI945643A FI945643A0 (fi) | 1992-06-01 | 1994-11-30 | Menetelmä veden poistamiseksi hienojakoisista kiintoainesuspensioista |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4218050.3 | 1992-06-01 | ||
DE4218050A DE4218050A1 (de) | 1992-06-01 | 1992-06-01 | Verfahren zur Entwässerung von feinteiligen Feststoffsuspensionen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993024798A1 true WO1993024798A1 (de) | 1993-12-09 |
Family
ID=6460155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/001297 WO1993024798A1 (de) | 1992-06-01 | 1993-05-24 | Verfahren zur entwässerung von feinteiligen feststoffsuspensionen |
Country Status (7)
Country | Link |
---|---|
US (1) | US5545332A (de) |
EP (1) | EP0642650A1 (de) |
CA (1) | CA2137134A1 (de) |
DE (1) | DE4218050A1 (de) |
FI (1) | FI945643A0 (de) |
WO (1) | WO1993024798A1 (de) |
ZA (1) | ZA933797B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012035278A1 (fr) * | 2010-09-16 | 2012-03-22 | Lafarge | Procede de drainage d'eau d'un amas de granulats |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19962883A1 (de) * | 1999-12-24 | 2001-07-12 | Cognis Deutschland Gmbh | Waschmitteltabletten |
DE19962859A1 (de) * | 1999-12-24 | 2001-07-12 | Cognis Deutschland Gmbh | Feste Waschmittel |
DE19962885A1 (de) * | 1999-12-24 | 2001-07-05 | Cognis Deutschland Gmbh | Wasch- und Reinigungsmittelformkörper mit verbesserten Zerfallseigenschaften |
DE19962886A1 (de) * | 1999-12-24 | 2001-07-05 | Cognis Deutschland Gmbh | Tensidgranulate mit verbesserter Auflösegeschwindigkeit |
US6797180B2 (en) * | 2002-05-01 | 2004-09-28 | Ge Betz, Inc. | Dewatering sand with surfactants |
US20080260744A1 (en) * | 2002-09-09 | 2008-10-23 | Omeros Corporation | G protein coupled receptors and uses thereof |
DE102007027371A1 (de) * | 2007-06-11 | 2008-12-18 | Cognis Oleochemicals Gmbh | Verfahren zur Herstellung einer Verbindung aufweisend mindestens eine Ester-Gruppe |
EP2477707B8 (de) | 2009-09-15 | 2017-07-26 | Suncor Energy Inc. | Verfahren zur trocknung von bruchfeinmaterial |
CA3050234C (en) | 2009-09-15 | 2022-11-08 | Suncor Energy Inc. | Techniques for flocculating and dewatering fine tailings |
WO2011050440A1 (en) | 2009-10-30 | 2011-05-05 | Suncor Energy Inc. | Depositing and farming methods for drying oil sand mature fine tailings |
IN2012DE02211A (de) * | 2012-07-17 | 2015-09-25 | Gen Electric |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723323A1 (de) * | 1987-07-15 | 1989-01-26 | Henkel Kgaa | Hydroxy-mischether, verfahren zu deren herstellung sowie deren verwendung |
DE3918274A1 (de) * | 1989-06-05 | 1990-12-06 | Henkel Kgaa | Verwendung von hydroxymischethern als hilfsmittel fuer die feststoffentwaesserung |
WO1991019556A1 (de) * | 1990-06-15 | 1991-12-26 | Henkel Kommanditgesellschaft Auf Aktien | Hilfsmittel bei der filtration und/oder entwässerung von mineral- und kohlesuspensionen |
WO1992004092A1 (de) * | 1990-09-04 | 1992-03-19 | Henkel Kommanditgesellschaft Auf Aktien | Verwendung von glycerinethern als hilfsmittel für die feststoffentwässerung |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2266954A (en) * | 1939-08-26 | 1941-12-23 | American Cyanamid Co | Wetting agent in settling of oe pulps |
-
1992
- 1992-06-01 DE DE4218050A patent/DE4218050A1/de not_active Withdrawn
-
1993
- 1993-05-24 CA CA002137134A patent/CA2137134A1/en not_active Abandoned
- 1993-05-24 WO PCT/EP1993/001297 patent/WO1993024798A1/de not_active Application Discontinuation
- 1993-05-24 US US08/347,324 patent/US5545332A/en not_active Expired - Fee Related
- 1993-05-24 EP EP93912771A patent/EP0642650A1/de not_active Withdrawn
- 1993-05-28 ZA ZA933797A patent/ZA933797B/xx unknown
-
1994
- 1994-11-30 FI FI945643A patent/FI945643A0/fi not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723323A1 (de) * | 1987-07-15 | 1989-01-26 | Henkel Kgaa | Hydroxy-mischether, verfahren zu deren herstellung sowie deren verwendung |
DE3918274A1 (de) * | 1989-06-05 | 1990-12-06 | Henkel Kgaa | Verwendung von hydroxymischethern als hilfsmittel fuer die feststoffentwaesserung |
WO1991019556A1 (de) * | 1990-06-15 | 1991-12-26 | Henkel Kommanditgesellschaft Auf Aktien | Hilfsmittel bei der filtration und/oder entwässerung von mineral- und kohlesuspensionen |
WO1992004092A1 (de) * | 1990-09-04 | 1992-03-19 | Henkel Kommanditgesellschaft Auf Aktien | Verwendung von glycerinethern als hilfsmittel für die feststoffentwässerung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012035278A1 (fr) * | 2010-09-16 | 2012-03-22 | Lafarge | Procede de drainage d'eau d'un amas de granulats |
FR2964883A1 (fr) * | 2010-09-16 | 2012-03-23 | Lafarge Sa | Procede d'acceleration et/ou d'augmentation du drainage d'eau d'un amas de granulats |
Also Published As
Publication number | Publication date |
---|---|
DE4218050A1 (de) | 1993-12-02 |
FI945643A (fi) | 1994-11-30 |
FI945643A0 (fi) | 1994-11-30 |
CA2137134A1 (en) | 1993-12-02 |
ZA933797B (en) | 1993-12-01 |
US5545332A (en) | 1996-08-13 |
EP0642650A1 (de) | 1995-03-15 |
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