WO1995000610A1 - Method for obtaining improved-purity fat derivatives from aqueous emulsions or dispersions - Google Patents
Method for obtaining improved-purity fat derivatives from aqueous emulsions or dispersions Download PDFInfo
- Publication number
- WO1995000610A1 WO1995000610A1 PCT/EP1994/001947 EP9401947W WO9500610A1 WO 1995000610 A1 WO1995000610 A1 WO 1995000610A1 EP 9401947 W EP9401947 W EP 9401947W WO 9500610 A1 WO9500610 A1 WO 9500610A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dispersions
- emulsions
- aqueous emulsions
- oils
- aqueous
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B13/00—Recovery of fats, fatty oils or fatty acids from waste materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Definitions
- the invention relates to a process for obtaining fatty substances with improved purity from aqueous emulsions or dispersions, in which aqueous emulsions or dispersions of natural fats and oils are cleaved by adding alkyl sulfates and the organic valuable phase is separated off.
- Natural fats and oils are valuable starting materials for the production of chemical intermediates such as fatty acids and fatty acid esters, as well as end products such as surfactants.
- the native raw materials cannot be used directly, rather a series of refining steps are required, of which the " Degumming "has a special meaning. This involves bringing the raw triglyceride into contact with acids with the aim of separating and washing out disruptive impurities in this way. To the derailment mung often includes "filling", a treatment
- Bleaching earth which should improve the color of the goods.
- triglycerides can be freed from phosphatides by first adding acids or acid anhydrides and then treating the acidic oils with aqueous alkalis below 70 ° C.
- European patent application EP-A2 0 478 090 supplements this teaching in that the neutralized oil can additionally be mixed with amorphous silicon dioxide.
- the object of the invention was therefore to develop a process by means of which valuable fatty substances can be separated from aqueous emulsions or dispersions quickly and in high purity and, on the other hand, the COD value of the waste water obtained can be improved.
- the invention relates to a process for obtaining fatty substances with improved purity from aqueous emulsions or dispersions, in which the aqueous emulsions or dispersions of natural fats and oils are mixed with alkyl sulfates of the formula (I),
- R 1 represents a linear or branched alkyl radical having 6 to 12 carbon atoms and X represents an alkali metal, splits and recovers the valuable materials in a manner known per se.
- the invention includes the knowledge that the organic materials recovered from the emulsions or dispersions, in particular fats and oils, have a particularly low ash content, which is synonymous with an unusually high quality.
- z. B. recover large parts of the valuable substances emulsified or dispersed in the wastewater from the degumming of triglycerides and at the same time improve the COD value of the wastewater by reducing the organic load.
- the process according to the invention is suitable for practically any mixing ratio of fat and water.
- aqueous emulsions or dispersions to which the process according to the invention can be applied include, for. B. those systems into consideration which are formed in the acid degumming of natural fats and oils and which have a water content of 1 to 10 wt .-%. These are therefore mixtures with a high fat and a low water content.
- aqueous emulsions or dispersions which are obtained as waste water (“Sauerwas ⁇ water”) in the acid degumming of fats and oils mentioned have a water content of 95 to 99.95% by weight and thus only own very low proportions of organic cargo.
- aqueous emulsions or dispersions can be used which contain 0.1 to 5% by weight of lipophilic components, for example mono-, di- and triglycerides, fatty acids and phosphatides and, if appropriate, metal impurities - in particular nickel - contain.
- Emulsions or dispersions of this type are preferably obtained in the acid degumming of natural fats and oils or as residues in the hardening.
- Capryl sulfate, lauryl sulfate and, in particular, decyl sulfate sodium salt can be considered for cleaving the emulsions or dispersions mentioned.
- technical mixtures can also be used, such as those obtained by sulfating so-called Cg-C ⁇ o -Vor - running fatty alcohols can be obtained.
- the alkyl sulfates are preferably used in the form of aqueous solutions or pastes with a solids content of 25 to 60% by weight. The amount added can be 0.005 to 5, preferably 0.05 to 0.1% by weight, based on the emulsions or dispersions.
- the splitting of the emulsions or dispersions generally takes place spontaneously and is completed within a few minutes.
- the temperature is a largely uncritical parameter for carrying out the method; it can be between 20 and 110 ° C.
- the emulsion or dispersion can be split in batches or in continuous operation. Separators, centrifuges, separators, separation pits or mixer-settler batteries, from which the valuable materials can be separated, are considered as components for this purpose.
- Fatty substances of surprisingly high quality, in particular low ash content can be produced by the process according to the invention.
- the method can be used both on aqueous emulsions or dispersions with very high and very low fat content. For example, 25 to 80% by weight of the organic materials contained in waste water from the acid removal of fats and oils can be recovered.
- the wastewater shows a v improved COD value by 10 to 40% compared to the standard.
- Comparative example 1 was repeated, but 175 g - corresponding to 0.05% by weight, based on the amount of waste water - of decyl sulfate sodium salt in the form of a 30% by weight aqueous solution was added to the waste water. A spontaneous phase separation began, which was completed after 5 minutes. In this way, 780 g - corresponding to 75% of the theoretical amount - could be separated off as the organic phase. The COD value of the aqueous phase was 35% based on Comparative Example VI.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fats And Perfumes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94920453A EP0705323A1 (en) | 1993-06-24 | 1994-06-15 | Method for obtaining improved-purity fat derivatives from aqueous emulsions or dispersions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4321023.6 | 1993-06-24 | ||
DE19934321023 DE4321023C1 (en) | 1993-06-24 | 1993-06-24 | Recovery of fats and oils with improved purity from emulsions or dispersion - comprises adding alkyl sulphate and then separating by known methods |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995000610A1 true WO1995000610A1 (en) | 1995-01-05 |
Family
ID=6491139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001947 WO1995000610A1 (en) | 1993-06-24 | 1994-06-15 | Method for obtaining improved-purity fat derivatives from aqueous emulsions or dispersions |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0705323A1 (en) |
DE (1) | DE4321023C1 (en) |
WO (1) | WO1995000610A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5378001B2 (en) * | 2009-02-17 | 2013-12-25 | 花王株式会社 | Method for purifying fatty acid alkyl ester |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3464976A (en) * | 1966-10-06 | 1969-09-02 | Brown Citrus Machinery Corp | Citrus oil recovery from emulsions |
JPS51138055A (en) * | 1975-05-23 | 1976-11-29 | Taihoo Kogyo Kk | Separation method of oil and water |
JPS57195A (en) * | 1980-06-04 | 1982-01-05 | Nippon Oils & Fats Co Ltd | Fractionation of fatty substance |
GB2173508A (en) * | 1984-06-08 | 1986-10-15 | Bristol Myers Co | Hard surface cleaning composition |
WO1991010718A1 (en) * | 1990-01-20 | 1991-07-25 | Henkel Kommanditgesellschaft Auf Aktien | Anti-froth cleaning agents and use thereof |
-
1993
- 1993-06-24 DE DE19934321023 patent/DE4321023C1/en not_active Expired - Fee Related
-
1994
- 1994-06-15 WO PCT/EP1994/001947 patent/WO1995000610A1/en not_active Application Discontinuation
- 1994-06-15 EP EP94920453A patent/EP0705323A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3464976A (en) * | 1966-10-06 | 1969-09-02 | Brown Citrus Machinery Corp | Citrus oil recovery from emulsions |
JPS51138055A (en) * | 1975-05-23 | 1976-11-29 | Taihoo Kogyo Kk | Separation method of oil and water |
JPS57195A (en) * | 1980-06-04 | 1982-01-05 | Nippon Oils & Fats Co Ltd | Fractionation of fatty substance |
GB2173508A (en) * | 1984-06-08 | 1986-10-15 | Bristol Myers Co | Hard surface cleaning composition |
WO1991010718A1 (en) * | 1990-01-20 | 1991-07-25 | Henkel Kommanditgesellschaft Auf Aktien | Anti-froth cleaning agents and use thereof |
Non-Patent Citations (4)
Title |
---|
DATABASE WPI Week 6600, Derwent World Patents Index; AN 66-39136F * |
DATABASE WPI Week 7703, Derwent World Patents Index; AN 77-04460Y * |
DATABASE WPI Week 8207, Derwent World Patents Index; AN 82-12441E * |
S. USUI ET AL.: "Destabilization of oil-in-water emulsion with inorganic electrolytes in the absence and in the presence of sodium dodecyl sulfate", JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, vol. 8, no. 4, 1987, pages 359 - 384 * |
Also Published As
Publication number | Publication date |
---|---|
EP0705323A1 (en) | 1996-04-10 |
DE4321023C1 (en) | 1994-02-10 |
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