US2082425A - Process for decolorizing sugar juices - Google Patents
Process for decolorizing sugar juices Download PDFInfo
- Publication number
- US2082425A US2082425A US739282A US73928234A US2082425A US 2082425 A US2082425 A US 2082425A US 739282 A US739282 A US 739282A US 73928234 A US73928234 A US 73928234A US 2082425 A US2082425 A US 2082425A
- Authority
- US
- United States
- Prior art keywords
- hydrogen peroxide
- sugar
- juices
- decolorizing
- sugar juices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000011389 fruit/vegetable juice Nutrition 0.000 title description 50
- 238000000034 method Methods 0.000 title description 22
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 78
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 34
- 239000000126 substance Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000004042 decolorization Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- 235000020374 simple syrup Nutrition 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 229960004793 sucrose Drugs 0.000 description 2
- 235000020357 syrup Nutrition 0.000 description 2
- 239000006188 syrup Substances 0.000 description 2
- 241000219310 Beta vulgaris subsp. vulgaris Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CZMRCDWAGMRECN-UHFFFAOYSA-N Rohrzucker Natural products OCC1OC(CO)(OC2OC(CO)C(O)C(O)C2O)C(O)C1O CZMRCDWAGMRECN-UHFFFAOYSA-N 0.000 description 1
- 235000021536 Sugar beet Nutrition 0.000 description 1
- SRBFZHDQGSBBOR-LECHCGJUSA-N alpha-D-xylose Chemical compound O[C@@H]1CO[C@H](O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-LECHCGJUSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229960003487 xylose Drugs 0.000 description 1
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 invention relates to the decolorizing of sugar juices of different kinds, for instance, raw sugar beet juice, cane sugar juice and the like.
- the sugar juice is heated, for instance, to a temperature of to 90 centigrade and then passed through a-fllter consisting of, or containing activated substances, for instance, an activated carbon filter, after a small quantity of hydrogen peroxide has been added to the juice before entering the filter.
- a-fllter consisting of, or containing activated substances, for instance, an activated carbon filter
- Mynew process may be applied tojuices of various origin as long as they are suitable for re-
- cane sugar, beet sugar, wood sugar juices and others may be purified in accordance with my invention.
- concentration of the sugar juices utilized may also vary within wide limits.
- Thin juices as well as syrups of a thick consistency can be decolorized by the process of this invention. I regulate the quantity of the hydrogen peroxide to be added ad- I vantageously in such a manner that the hydrogen peroxide has been used up after the juice leaves the carbon filter. Otherwise, the juice may turn yellow on being further evaporated.
- the most favorable consumption of hydrogen peroxide when purifying thickened raw sugar juice, starch sugar syrup and the like at about 0.1 to 0.15
- the process according to my invention may also be carried out by mixing the substances of large surface action such as activated charcoal with the hydrogen peroxide solution adding the mixture to the sugar juice, for instance, by stirring it into the latter and filtering off the charcoal from the sugar juice after some time.
- substances of large surface action such as activated charcoal
- Example 1 The juice of starch sugar syrup coming from the thin juice filter presses at a temperature of about centigrade, after it has been thickened, is mixed before it enters the second bone charcoal filter with .1 to .15% of 30% a necessary.
- raw juice coming from the filter presses may be mixed with small quantities of to centigrade with small quantities ofhydrogen peroxide (30% byvolum'e) the quantity being about .1 to .15% of the weight of the juice, adding simultaneously such activated carbons as are known as decolorizing carbons.
- the duration of the action is about 15 minutes.
- the decolorizing action obtained when applying .5% of the said carbons and .1% of hydrogen peroxide solution 30% is a better one than when working with 2% of carbon without the addition of hydrogen peroxide.
- the action as regards decolorization is approximately the same as when applying 2% or the carbon alone.
- a process of decolorizing sugar juices which comprises subjecting said juices to the simultaneous action of hydrogen peroxide and a substance of increased surfaceaction selected from the group which consists of activated charcoal,
- bone charcoal and silica gel at a temperature within the range 60-90 C., the quantity of hydrogen peroxide present being such that the sugar juices, at the termination of the decolorizing process are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises subjecting said juices to the simultaneous action of hydrogen peroxide and a substance of increased surface. action selected from the group which consists of activated charcoal, bone charcoal and silica gel at a tempera-P ture of approximately '75, C., the quantity of hydrogen peroxide present being such that the sugar juices, at the termination of the decolorizing process are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises subjecting the juices simultaneously to the conjoint action of hydrogen peroxide and activated carbon at an elevated temperature, within the range 60-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises subjecting said juices simultaneously to the conjoint action of hydrogen peroxide and bone charcoal at an elevated temperature, within the range Gil-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises subjecting said juices simultaneously to the conjoint action of hydrogen peroxide and silica gel at an elevatedtemperature, within the range 60-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises adding hydrogen peroxide thereto and passing the mixture through a filter containing a substance of increased surface action selected from the group which consists of activated charcoal, bone charcoal and silica gel, said mixture of hydrogen peroxide and sugar juices being maintained at an elevated temperature, within the range Gil-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
- a process for decolorizing sugar juices which comprises the steps of adding hydrogen peroxide to said juices, and passing said juices through a filter which contains'a substance of increased surface action selected from the group which consists of activated charcoal, bone charcoal and silica gel, the temperature of the sugar juices being maintained within the range 60-90 C. during the decolorizing process, and the quantity of hydrogen peroxide added being substantially 0.1% to 0.15% by weight of 30% hydrogen peroxide solution, this amount being based on the weight of the sugar juices treated.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Non-Alcoholic Beverages (AREA)
Description
Patented June 1, 1937 UNITED STATES PATENT OFFICE 2,082,425 raocsss roa DEOOLORIZING SUGAR JUICES No Drawing.
Application August 10, 1934, Serial No. 739,282. In Germany July 10, 1933' 7 Claims.
The invention relates to the decolorizing of sugar juices of different kinds, for instance, raw sugar beet juice, cane sugar juice and the like.
It is well known that sugar juices or solutions of sugar are unstable at higher temperatures and decompose with generation of acid products. This decomposition is accelerated by contacting substances with great surfaces, even active charcoal acting as such. Hydrogen peroxide also acts in the same direction. Sugar solutions to which hydrogen peroxide has been added become yellow on heating and soon show strong acid reaction. On the other hand, the addition of hydrogen peroxide to colored sugar solution at ordinary temperature shows a progressing decolorization with time so that after standing for several days a-complete colorlessness of the solution may be obtained. 7
In consequence, it has been suggested, to purify sugar solutions by treating them at a low temperature, for instance, in a cooled mash tub with hydrogen peroxide. After the hydrogen peroxide has reacted for some time and has been used up either completely or to a greater part which may be judged by the progressing decolorization the solution containing sugar is heated almost to boiling point. This working method, therefore requires a considerable length of time and for this reason cannot be carried into effect technically and economically.
Furthermore it has been suggested to utilize activated charcoal simultaneously with the hydrogen peroxide for the decolorization of sugar juices. This treatment, however, had to be carried out at room temperature in order to avoid decompositions, and in consequence necessitates the considerable time of from 5 to 6 hours. Only after the oxidation was finished the syrup was heated to temperatures of'80 to 90 centigrade. The effect obtained by this process, although in itself a very satisfactory one required a considerable time and therefore also was of no practical value.
The processes mentioned above for the purification and decolorization of sugar juices by utilizing hydrogen peroxide alone or simultaneously with activated charcoal were found on the consideration that hydrogen peroxide reacts at higher temperatures unfavorably upon sugar and therefore gave the prescription that the solutions should not be heated before the oxidation is fin- .ished that means until the hydrogen peroxide had been used up.
I have found to my surprise that sugar juices may be decolorized in a very short time by the fining purposes.
simultaneous application of hydrogen peroxide and substances of great surface such as activated charcoal, bone charcoal, activated silica or the like by working at elevated temperatures. For this purpose the sugar juice is heated, for instance, to a temperature of to 90 centigrade and then passed through a-fllter consisting of, or containing activated substances, for instance, an activated carbon filter, after a small quantity of hydrogen peroxide has been added to the juice before entering the filter.
Mynew process may be applied tojuices of various origin as long as they are suitable for re- Thus, cane sugar, beet sugar, wood sugar juices and others may be purified in accordance with my invention. The concentration of the sugar juices utilized may also vary within wide limits. Thin juices as well as syrups of a thick consistency can be decolorized by the process of this invention. I regulate the quantity of the hydrogen peroxide to be added ad- I vantageously in such a manner that the hydrogen peroxide has been used up after the juice leaves the carbon filter. Otherwise, the juice may turn yellow on being further evaporated. The most favorable consumption of hydrogen peroxide when purifying thickened raw sugar juice, starch sugar syrup and the like at about 0.1 to 0.15
of hydrogen peroxide (30% by weight) to the weight of the juice. When more hydrogen per,- oxide is used its efliciency is only slightly increased. My new process not only shortens considerably the time of reaction but also increases the efiicacy of the carbon as regards decolorization. In this way it is possible ,to prolong the efficiency of the activated charcoal.
The process according to my invention may also be carried out by mixing the substances of large surface action such as activated charcoal with the hydrogen peroxide solution adding the mixture to the sugar juice, for instance, by stirring it into the latter and filtering off the charcoal from the sugar juice after some time.
Examples Example 1.-The juice of starch sugar syrup coming from the thin juice filter presses at a temperature of about centigrade, after it has been thickened, is mixed before it enters the second bone charcoal filter with .1 to .15% of 30% a necessary.
. In the same way raw juice coming from the filter presses may be mixed with small quantities of to centigrade with small quantities ofhydrogen peroxide (30% byvolum'e) the quantity being about .1 to .15% of the weight of the juice, adding simultaneously such activated carbons as are known as decolorizing carbons. The duration of the action is about 15 minutes. The decolorizing action obtained when applying .5% of the said carbons and .1% of hydrogen peroxide solution 30% is a better one than when working with 2% of carbon without the addition of hydrogen peroxide. By the application of .5% of the decolorizing carbon simultaneously-with .05% hydrogen peroxide solution the action as regards decolorization is approximately the same as when applying 2% or the carbon alone.
What I claim is:
1. A process of decolorizing sugar juices which comprises subjecting said juices to the simultaneous action of hydrogen peroxide and a substance of increased surfaceaction selected from the group which consists of activated charcoal,
bone charcoal and silica gel at a temperature within the range 60-90 C., the quantity of hydrogen peroxide present being such that the sugar juices, at the termination of the decolorizing process are substantially free from undecomposed hydrogen peroxide.
2. A process for decolorizing sugar juices which comprises subjecting said juices to the simultaneous action of hydrogen peroxide and a substance of increased surface. action selected from the group which consists of activated charcoal, bone charcoal and silica gel at a tempera-P ture of approximately '75, C., the quantity of hydrogen peroxide present being such that the sugar juices, at the termination of the decolorizing process are substantially free from undecomposed hydrogen peroxide.
3. A process for decolorizing sugar juices which comprises subjecting the juices simultaneously to the conjoint action of hydrogen peroxide and activated carbon at an elevated temperature, within the range 60-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
4. A process for decolorizing sugar juices which comprises subjecting said juices simultaneously to the conjoint action of hydrogen peroxide and bone charcoal at an elevated temperature, within the range Gil-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
5. A process for decolorizing sugar juices which comprises subjecting said juices simultaneously to the conjoint action of hydrogen peroxide and silica gel at an elevatedtemperature, within the range 60-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
6. A process for decolorizing sugar juices which comprises adding hydrogen peroxide thereto and passing the mixture through a filter containing a substance of increased surface action selected from the group which consists of activated charcoal, bone charcoal and silica gel, said mixture of hydrogen peroxide and sugar juices being maintained at an elevated temperature, within the range Gil-90 C., the quantity of hydrogen peroxide which is added to said sugar juices being such that at the termination of the decolorizing process said sugar juices are substantially free from undecomposed hydrogen peroxide.
7. A process for decolorizing sugar juices which comprises the steps of adding hydrogen peroxide to said juices, and passing said juices through a filter which contains'a substance of increased surface action selected from the group which consists of activated charcoal, bone charcoal and silica gel, the temperature of the sugar juices being maintained within the range 60-90 C. during the decolorizing process, and the quantity of hydrogen peroxide added being substantially 0.1% to 0.15% by weight of 30% hydrogen peroxide solution, this amount being based on the weight of the sugar juices treated.
EMIL BCHELLER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2082425X | 1933-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2082425A true US2082425A (en) | 1937-06-01 |
Family
ID=7984047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US739282A Expired - Lifetime US2082425A (en) | 1933-07-10 | 1934-08-10 | Process for decolorizing sugar juices |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2082425A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2759023A (en) * | 1952-11-03 | 1956-08-14 | Scholten Chemische Fab | Process of manufacturing polyhydric alcohols by catalytic reduction of carbohydrates |
| WO2014133741A1 (en) | 2013-02-26 | 2014-09-04 | Emd Millipore Corporation | Selective removal of a protein from a mixture of proteins using activated carbon by adjusting solution conditions |
-
1934
- 1934-08-10 US US739282A patent/US2082425A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2759023A (en) * | 1952-11-03 | 1956-08-14 | Scholten Chemische Fab | Process of manufacturing polyhydric alcohols by catalytic reduction of carbohydrates |
| WO2014133741A1 (en) | 2013-02-26 | 2014-09-04 | Emd Millipore Corporation | Selective removal of a protein from a mixture of proteins using activated carbon by adjusting solution conditions |
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