WO1999055918A2 - Verfahren zur entfärbung eines zuckersaftes - Google Patents
Verfahren zur entfärbung eines zuckersaftes Download PDFInfo
- Publication number
- WO1999055918A2 WO1999055918A2 PCT/IB1999/001156 IB9901156W WO9955918A2 WO 1999055918 A2 WO1999055918 A2 WO 1999055918A2 IB 9901156 W IB9901156 W IB 9901156W WO 9955918 A2 WO9955918 A2 WO 9955918A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sugar juice
- sugar
- ozone
- juice
- container
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
- C13B20/08—Purification of sugar juices by oxidation or reduction
Definitions
- the present invention relates to a method for at least partial decolorization of a sugar juice and an apparatus for use in this method.
- a “sugar juice” is understood to mean a sugar-containing juice which is obtained in the production of sugar, for example in the production of sugar from sugar cane or sugar beets.
- the sugar juice is usually a cane sugar or beet sugar juice.
- the juice stream can come from a sugar refinery. This can be, for example, a fine juice, a carbonated juice, a sulfited juice or a raw melt.
- Such juices and juice streams are generally not colorless and are usually decolorized as part of the refining process.
- the method according to the invention is particularly suitable for decoloring raw sugar melt.
- decolorization processes for decolorizing sugar juices include Processes such as carbonation (decolorization of sugar juice using carbon dioxide gas and lime), phosphatation (decolorization of sugar juice using phosphoric acid and lime), sulfitation (decolorization of sugar juice using sulfur dioxide gas and lime), the use of activated carbon Use of ion exchange resins and combinations of these processes.
- These color removal methods are hereinafter referred to as conventional color removal methods or methods.
- two of the above methods are generally used in succession.
- the color of a sugar juice is usually measured by determining the UV absorbance of the juice according to the ICUMSA 420 color test using a UV spectrophotometer and is expressed in ICUMSA color units. Generally, a crystal sugar color of 30 to 40 ICUMSA color units is acceptable. The color of a sugar juice from sugar production before decolorization is generally about 1000 to 2000 ICUMSA color units. ICUMSA is the acronym for International Commission for Uniform Methods of Sugar Analysis.
- the sugar concentration of a sugar juice is generally determined using a Brix saccharometer or a Balling saccharometer and is expressed in degrees Brix. Degrees Brix is defined as the percentage by mass of dissolved substances in a solution at a certain temperature. Since the juices used in refining are generally very pure, it can be assumed that the solids dissolved are practically exclusively sucrose. In the refining process, an aqueous solution with a Brixer value of 65 contains 65% (m / m) sucrose. According to a first aspect of the invention, a
- a method for at least partial decolorization of a sugar juice containing coloring substances in which one adds so much ozone to the sugar juice that the sugar juice is at least partially decolorized; and allows the ozone to react with at least some of the coloring substances in the sugar juice, whereby the sugar juice is at least partially decolorized.
- the sugar juice containing the coloring substances usually has a color of about 1000 to 2000 ICUMSA color units before decolorization.
- the ozone can be added to the sugar juice in an amount that corresponds to 50 to 400 ppm of the amount of sugar in the sugar juice. So you can, for example, with a sugar content of
- the ozone can be passed directly to an existing refining device or a custom-made ozonization loop that originates from an existing tank or line in a refinery and either to the same tank or line or to a downstream of the tank or Line located point can lead back.
- the amount of ozone supplied naturally depends on the intensity of the color of the sugar juice to be decolorized and the degree of decolorization required.
- Color of a maximum of 40 ICUMSA color units after the subsequent conventional color removal methods usually requires a reduction in the color of the sugar juice by about 10 to 90%. This amount of color reduction depends on the intensity of the initial color in the sugar juice, the position of the ozone feed point during refining, various economic factors and the required color level in the refined sugar.
- an important aspect of the invention is that the ozone reacts with the coloring substances present in the sugar juice, which makes them easier to remove in subsequent conventional color removal processes. Ozonation alone does not necessarily lead to a complete decolorization of the coloring substances, but to improved color removal in subsequent conventional color removal methods.
- the method can therefore include at least one subsequent color removal step for the further removal of unreacted or unmodified coloring substances, the decomposition products of ozonization and the coloring substances modified by ozonization.
- the at least partially decolorized sugar juice can be subjected to at least one of the following processes: carbonation, sulfitation, phosphation, treatment with an ion exchange resin, treatment with activated carbon or combinations thereof.
- the method can thus include at least one further decolorization step, selected from carbonation ion, phosphate ion, sulfitation, treatment with an ion exchange resin, treatment with activated carbon and combinations thereof.
- the method can instead or in addition to this a filtration step to remove staining Include substances. It can include one or more of the above color removal steps as well as a filtration step.
- the pH of the sugar juice can be adjusted before ozonization.
- a base e.g. an alkali metal hydroxide, e.g. Sodium hydroxide.
- sodium hydroxide can be added to the sugar juice before ozonation in an amount which corresponds to 30 to 50 ppm of the amount of sugar in the sugar juice. So you can, for example, with a sugar content of
- the ozone can be any organic compound.
- Supply temperature from about 50 to 75 ° C.
- the invention also relates to an at least partially decolorized sugar juice, produced by a process as described above.
- a device for use in the at least partial decolorization of a sugar juice with a sugar juice container which defines a decolorization zone in which a sugar juice can be decolorized; a sugar juice supply for supplying sugar juice into the sugar juice container and an ozone supply for supplying ozone into the sugar juice container.
- the sugar juice container can be one
- Act reaction vessel can also be a gas absorption column through which the sugar juice flows, or instead part of a feed line or Flow system through which the sugar juice flows, for example is pumped through, for example in a sugar refinery.
- the device can have at least one storage container, e.g. a storage tank for at least partially decolorised sugar juice and at least one other storage container, e.g. contain at least one other storage tank for the sugar juice after the at least partial decolorization.
- the device contains feed or flow means for introducing the sugar juice into the decolorization zone and discharging the sugar juice from the decolorization zone.
- the ozone supply can contain an oxygen-fed ozone generator.
- the ozone can be supplied by any suitable gas supply method.
- the ozone supply can be selected from Venturi nozzles, injection nozzles, diffusers, ejector nozzles, own distributor rings, gas distributors and combinations thereof.
- the ozone supply can be arranged in such a way that the ozone is fed directly to the reaction vessel or also to a line entering the reaction vessel.
- the container should preferably be equipped with its own gas dispersion mixer or mixing stirrer, e.g. a shear mixer, e.g. a Silverson mixer, which provides a high-shear mixing of the sugar juice in the decolorization zone, so that the ozone supplied and the coloring substances are effectively dispersed in the sugar juice and come into contact and react with one another.
- a shear mixer e.g. a Silverson mixer
- the device can also contain conventional color removal agents, for example a saturator of the type used for conventional carbonation decolorization for the purpose of precipitating coloring substances. It can also contain filtering agents, for example a sand filter for filtering out precipitated coloring substances.
- the device can thus contain further paint removal agents, selected from carbonating agents, phosphating agents, sulfiting agents, ion exchange resin treatment agents, activated carbon treatment agents and Combinations of these included.
- the storage tank can be provided with supply means for supplying a base and / or a defoamer to the sugar juice in the storage tank.
- This can be a Venturi nozzle, for example.
- the sugar juice container defining the decolorization zone can be a storage tank, which thus acts as a reaction container.
- the storage tank can then be provided with ozone feeds for supplying ozone to the sugar juice in the storage tank, as described above.
- supply means for supplying a base and / or a defoamer, as described above. It can also be modified so that it has a
- Gas dispersion mixer as described above contains.
- the device can contain regulating devices for regulating the amount of ozone added to the sugar juice and optionally the amount of base and / or defoamer added.
- the control device can be a control valve.
- An appropriate degassing method should be used to remove the oxygen dissolved in and contained in the sugar juice as well as any unreacted ozone.
- the gas mixture of ozone and oxygen is generally saturated with water vapor. If it is determined or expected that the ozone concentration in this exhaust gas is above the maximum safe workplace concentration, a suitable ozone decomposer should be installed in the exhaust pipe. As an alternative to venting the gas, it could be used elsewhere in the factory, for example for cooling water treatment, wastewater treatment, sterilization of another process or for enriching oxygen in the feed gas of a power plant.
- FIGS. 1 and 2 are flow diagrams of inventive represent decolorization devices.
- reference numeral 10 generally designates a decolorizing device for decoloring sugar juice.
- the device is shown schematically in the drawing.
- the apparatus 10 includes a raw sugar source 12, a melt tank 14, a lime mixer 16, a carbon dioxide saturator 18, a carbonation filter arrangement 20, a sulfitation container 22 and a filter arrangement 24 for sulfited juice.
- Supply lines which are shown schematically by lines 26, 28,
- a feed line 37 extends from a carbon dioxide source 38 to the carbon dioxide saturator 18, and a feed line 39 extends from a sulfur dioxide source 40 to the sulfitation tank 22.
- a feed line 41 extends from the filter arrangement 24 to a crystallization device, not shown.
- An input line 11 extends to the raw sugar source 12.
- the supply line 28 between the melt tank 14 and the lime mixer 16 is made via an supply line 43 from an ozone source 45, the supply line 34 between the carbonation filter arrangement 20 and the sulfitation container 22 via a supply line 46 an ozone source 48 or the feed line 41 after the filter arrangement 24 for sulfited juice via a feed line 50 from an ozone source 52 to ozone.
- the ozone sources 45, 48, 52 are each an ozone generator. Ozone is added to the sugar juice in an amount of about 50 to 400 ppm of the amount of sugar in the sugar juice.
- reference numeral 100 generally designates another embodiment of a decolorizing device for Decolorization of sugar juice.
- the device is also shown schematically in the drawing.
- Device 100 includes a storage tank 102, which may be part of an existing device in a refinery, such as a melt tank, or a new tank dedicated to the decolorization device, a contact or reaction container 104, a post-ozonation storage tank 106 and a further conventional paint removal device 108.
- the contact container 104 is provided with a shear mixer or gas dispersion mixer, not shown.
- a metering container 110 for controlling the pH value is connected to the storage tank 102 via a feed line 112.
- a defoamer supply container 114 is connected to the storage tank 102 via a feed line 116.
- the two supply lines 112 and 116 are each equipped with control devices, not shown, such as Valve assemblies to control the flow of a pH control agent (such as an aqueous sodium hydroxide solution) and a defoamer, e.g. BEVALOID 2261 (trade name) for storage tank 102.
- An ozone generator 118 is connected to the contact container 104 via an ozone supply line 120.
- a sugar juice supply line 122 extends from a sugar juice source to the storage tank 102. Further supply lines 124, 126, 128 extend from the storage tank 102 to the contact container 104, from the contact container 104 to the post-ozonization storage container 106 or from the container 106 to the conventional paint removal device 108. An ozone return supply line 130 extends from the post-ozonization storage tank 106 back to the ozone generator 118. Decolorized sugar juice is fed through a feed line 132, which starts from the conventional paint removal device 108, for example flowed or pumped into a storage tank, not shown.
- the sugar juice stream in various embodiments of the invention can be a fine juice, a carbonated juice, a sulfited juice, a phosphated juice or a raw melt.
- the sugar juice flows through the feed line 122 into the storage tank 102, in which the pH of the juice is optionally adjusted to 6.8 to 7.2 by adding sodium hydroxide from the dosing container 110 to control the pH via the feed line 112 and, if appropriate, the defoamer from the defoamer supply container 114 is added via the feed line 116.
- the sugar juice, the pH of which has optionally been set, flows via the feed line 124 into the contact container 104. There, the sugar juice is then mixed with feed line 120 from the ozone generator 118.
- the ozone is fed via a feed line from the ozone generator 118 to the feed line 124, which takes place with the aid of a suitable gas feed mechanism, not shown, the contacting of the ozone and the sugar juice being promoted with the aid of the shear mixer or gas dispersion mixer.
- Ozone is added to the sugar juice in an amount of about 50 to 400 ppm of the amount of sugar in the sugar juice.
- the decolorized sugar juice passes from the contact container 104 via the feed line 126 into the post-ozonization storage tank 106.
- the post-ozonization storage tank 106 is a storage tank pressurized for the best possible ozone adsorption or a degassing tank for removing undissolved ozone / Oxygen mixture, which is optionally returned to the ozone generator 118 via the ozone return line 130.
- the undissolved ozone / oxygen mixture is either released into the atmosphere via an appropriate mechanism or used elsewhere in the factory where oxygen and / or ozone can be advantageous for the process (not shown).
- the ozonated juice then reaches the conventional color removal device 108 via the feed line 128, in which the coloring substances are removed.
- the conventional color removal device 108 includes a filtration device, not shown, for filtering out precipitated coloring substances.
- the ozonated sugar juice is returned to the storage tank 102.
- the advantages of the illustrated invention are: reduced coloration of refined sugar; reduced content of bacteria, fungi and mold in the end product; Improved refining capacity in off-harvest refining where coal is burned as a C0 2 source for a carbonation decolorizing device; less recycling of sugar and thus improved plant capacity; in general, sugar can be packed from at least one additional cycle instead of being recycled; no significant increase in the content of organic acids in the end product; Since color precursors are removed or destroyed by the ozonization, only little color regression occurs in the subsequent cooking steps; no problems with the discharge of the discharge stream; no regeneration problems; the system is easy to install, operate and control; no harmful additives remain in the end product; ozonization is considered an environmentally friendly method.
- Another advantage of the described invention is that the ozonization process according to the invention can be used in conjunction with known decolorization methods, such as carbonation, phosphatation, sulfitation and ion exchange. It has been found that the process according to the invention is particularly suitable for decolorization of sugar juices which are colored more strongly than usual, for example sugar juices from sugar cane grown under arid conditions.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Saccharide Compounds (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9910022-3A BR9910022A (pt) | 1998-04-28 | 1999-04-15 | Método de descoloramento de um licor de açúcar |
AU40553/99A AU4055399A (en) | 1998-04-28 | 1999-04-15 | Method for decolorizing sugar juice |
EP99923825A EP1076724A2 (de) | 1998-04-28 | 1999-04-15 | Verfahren zur entfärbung eines zuckersaftes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA98/3555 | 1998-04-28 | ||
ZA983555A ZA983555B (en) | 1998-04-28 | 1998-04-28 | A method of decolourising a sugar liquor |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999055918A2 true WO1999055918A2 (de) | 1999-11-04 |
WO1999055918A3 WO1999055918A3 (de) | 2000-02-03 |
Family
ID=25586981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1999/001156 WO1999055918A2 (de) | 1998-04-28 | 1999-04-15 | Verfahren zur entfärbung eines zuckersaftes |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1076724A2 (de) |
AU (1) | AU4055399A (de) |
BR (1) | BR9910022A (de) |
WO (1) | WO1999055918A2 (de) |
ZA (1) | ZA983555B (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003050313A2 (es) * | 2001-12-13 | 2003-06-19 | Centro Nacional De Investigaciones Cientificas (Cnic) | Sistema de decoloracion de licores clarificados de la industria azucarera con ozono |
EP2499267A1 (de) * | 2009-11-11 | 2012-09-19 | Carbo - UA Limited | Zusammensetzungen und verfahren für verbesserte phosphatierungsklärung von zuckerlaugen und sirups |
GB2522777A (en) * | 2013-12-23 | 2015-08-05 | T & L Sugars Ltd | Novel purification processes |
US9163292B2 (en) | 2009-11-11 | 2015-10-20 | Carbo-UA Limited | Compositions and process for improving carbonatation clarification of sugar liquors and syrups |
US9175358B2 (en) | 2009-11-11 | 2015-11-03 | Carbo-UA Limited | Compositions and processes for sugar treatment |
US9605324B2 (en) | 2009-12-23 | 2017-03-28 | Carbo-UA Limited | Compositions and processes for clarification of sugar juices and syrups in sugar mills |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103710468B (zh) * | 2013-09-30 | 2016-01-13 | 广西大学 | 一种使用臭氧脱色技术的甘蔗制糖澄清方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL12990C (de) * | ||||
FR385639A (fr) * | 1907-12-27 | 1908-05-19 | Henri Steffens | Procédé concernant l'épuration des jus dans la fabrication du sucre de betteraves |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA775145B (en) * | 1977-08-25 | 1978-11-29 | Bateman Ltd E | Improvements in the treatment of effluents |
SU1730157A1 (ru) * | 1989-07-06 | 1992-04-30 | Курский филиал Всесоюзного научно-исследовательского института сахарной промышленности | Способ очистки диффузионного сока |
RU2036241C1 (ru) * | 1994-03-18 | 1995-05-27 | Юрий Николаевич Никифоров | Способ очистки желтого сахара |
-
1998
- 1998-04-28 ZA ZA983555A patent/ZA983555B/xx unknown
-
1999
- 1999-04-15 BR BR9910022-3A patent/BR9910022A/pt not_active Application Discontinuation
- 1999-04-15 AU AU40553/99A patent/AU4055399A/en not_active Abandoned
- 1999-04-15 WO PCT/IB1999/001156 patent/WO1999055918A2/de not_active Application Discontinuation
- 1999-04-15 EP EP99923825A patent/EP1076724A2/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL12990C (de) * | ||||
FR385639A (fr) * | 1907-12-27 | 1908-05-19 | Henri Steffens | Procédé concernant l'épuration des jus dans la fabrication du sucre de betteraves |
Non-Patent Citations (4)
Title |
---|
CHEMICAL ABSTRACTS, vol. 119, no. 12, 20. September 1993 (1993-09-20) Columbus, Ohio, US; abstract no. 119898, D.V.OZEROV ET AL.: "method for purification of diffusion juice" XP002121903 & SU 1 730 157 A * |
DATABASE WPI Section Ch, Week 197909 Derwent Publications Ltd., London, GB; Class D17, AN 1979-17985B XP002121905 & ZA 7 705 145 A (BATEMAN LTD E L), 9. Oktober 1978 (1978-10-09) * |
DATABASE WPI Section Ch, Week 199604 Derwent Publications Ltd., London, GB; Class D17, AN 1996-038616 XP002121904 & RU 2 036 241 C (NIKIFOROV YU N), 27. Mai 1995 (1995-05-27) * |
M.MOODLEY ET AL: "Full scale decolourisation trials with ozone" INTERNATIONAL SUGAR JOURNAL., Bd. 101, Nr. 1203, M{rz 1999 (1999-03), Seiten 165-171, XP002121923 THE INTERNATIONAL SUGAR JOURNAL LTD. HIGH WYCOMBE., GB ISSN: 0020-8841 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003050313A2 (es) * | 2001-12-13 | 2003-06-19 | Centro Nacional De Investigaciones Cientificas (Cnic) | Sistema de decoloracion de licores clarificados de la industria azucarera con ozono |
WO2003050313A3 (es) * | 2001-12-13 | 2003-10-23 | Cnic Ct Nac Investigaciones | Sistema de decoloracion de licores clarificados de la industria azucarera con ozono |
EP2499267A1 (de) * | 2009-11-11 | 2012-09-19 | Carbo - UA Limited | Zusammensetzungen und verfahren für verbesserte phosphatierungsklärung von zuckerlaugen und sirups |
EP2499267A4 (de) * | 2009-11-11 | 2014-03-26 | Carbo Ua Ltd | Zusammensetzungen und verfahren für verbesserte phosphatierungsklärung von zuckerlaugen und sirups |
US9163293B2 (en) | 2009-11-11 | 2015-10-20 | Carbo-UA Limited | Compositions and processes for improving phosphatation clarification of sugar liquors and syrups |
US9163292B2 (en) | 2009-11-11 | 2015-10-20 | Carbo-UA Limited | Compositions and process for improving carbonatation clarification of sugar liquors and syrups |
US9175358B2 (en) | 2009-11-11 | 2015-11-03 | Carbo-UA Limited | Compositions and processes for sugar treatment |
US9605324B2 (en) | 2009-12-23 | 2017-03-28 | Carbo-UA Limited | Compositions and processes for clarification of sugar juices and syrups in sugar mills |
GB2522777A (en) * | 2013-12-23 | 2015-08-05 | T & L Sugars Ltd | Novel purification processes |
WO2015097455A3 (en) * | 2013-12-23 | 2015-08-20 | T&L Sugars Limited | Novel purification processes |
US9976193B2 (en) | 2013-12-23 | 2018-05-22 | T&L Sugars Limited | Purification processes |
Also Published As
Publication number | Publication date |
---|---|
AU4055399A (en) | 1999-11-16 |
ZA983555B (en) | 1999-08-25 |
WO1999055918A3 (de) | 2000-02-03 |
BR9910022A (pt) | 2001-10-23 |
EP1076724A2 (de) | 2001-02-21 |
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