WO2008139431A2 - A method and composition for treating raw sugar juice - Google Patents

A method and composition for treating raw sugar juice Download PDF

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Publication number
WO2008139431A2
WO2008139431A2 PCT/IB2008/051940 IB2008051940W WO2008139431A2 WO 2008139431 A2 WO2008139431 A2 WO 2008139431A2 IB 2008051940 W IB2008051940 W IB 2008051940W WO 2008139431 A2 WO2008139431 A2 WO 2008139431A2
Authority
WO
WIPO (PCT)
Prior art keywords
composition
raw sugar
sugar juice
mass
polyamide
Prior art date
Application number
PCT/IB2008/051940
Other languages
French (fr)
Other versions
WO2008139431A3 (en
Inventor
Stefano Paolo Gabba
Original Assignee
Gabba, Lorenzo Francesco
Gabba, Gabriele Maria
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gabba, Lorenzo Francesco, Gabba, Gabriele Maria filed Critical Gabba, Lorenzo Francesco
Publication of WO2008139431A2 publication Critical patent/WO2008139431A2/en
Publication of WO2008139431A3 publication Critical patent/WO2008139431A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B20/00—Purification of sugar juices
    • C13B20/005—Purification of sugar juices using chemicals not provided for in groups C13B20/02 - C13B20/14
    • 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
    • C13B20/10—Purification of sugar juices by oxidation or reduction using sulfur dioxide or sulfites
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B20/00—Purification of sugar juices
    • C13B20/12—Purification of sugar juices using adsorption agents, e.g. active carbon
    • C13B20/123—Inorganic agents, e.g. active carbon

Definitions

  • This invention relates to a method of treating raw sugar juice. It relates also to a composition for use in the treatment of raw sugar juice.
  • raw sugar juice any reference herein to "raw sugar juice” must be interpreted to mean a reference to sugar juice which is at a stage in a sugar extraction process prior to clarification of the sugar juice.
  • composition for use in the treatment of raw sugar juice which includes the following active ingredients in the following percentages by mass:
  • the composition may include 40% to 60% by mass of the polyamide flocculating component and 30% to 55% by mass of the sodium bentonite.
  • the polyamide flocculating component may be in the form of a cationic polyacrylamide.
  • the polyamide flocculating component may be in the form of an anionic polyacrylamide.
  • the decolourizing agent may be activated carbon. More specifically, the composition may include 1 to 5% of the activated carbon.
  • the composition may include a reducing agent. More specifically, the reducing agent may be in the form of a sulphite compound. Yet more specifically, the sulphite compound may be in the form of potassium metabisulphite.
  • composition may include the following active ingredients in the following percentages by mass:
  • a method of treating raw sugar juice which includes:
  • compositions as defined hereinabove in accordance with the first aspect of the invention combining the composition as defined hereinabove in accordance with the first aspect of the invention, and water to form a diluted dosing composition;
  • the method may include combining the composition and the water to form said dosing composition containing 0.03% to 0.08% by mass of the composition.
  • the method may include combining the composition and the water to form said dosing composition containing about 0.05% by mass of the composition.
  • the method may include dosing the raw sugar juice by adding said effective amount of the dosing composition to the raw sugar juice, in which the amount of the composition added to the raw sugar juice is between 4 and 7 milligrams of the composition per litre of the raw sugar juice.
  • a method of treating raw sugar juice which includes dosing the raw sugar juice by adding the following active ingredients to the raw sugar juice:
  • a decolourizing agent wherein the total amount of the active ingredients added to the raw sugar juice is between 4 and 7 milligrams per litre of the raw sugar juice, and wherein the polyamide flocculating component constitutes 20% to 70% by mass, the sodium bentonite constitutes 20% to 70% by mass and the activated carbon constitutes 1 % to 20% by mass of the total amount of the active ingredients added to the raw sugar juice, the polyamide flocculating component and the sodium bentonite being flocculating agents which combine to flocculate impurities in suspension in the raw sugar juice.
  • the polyamide flocculating component may be in the form of a cationic polyacrylamide.
  • the polyamide flocculating component may be in the form of an anionic polyacrylamide.
  • the decolourizing agent may be activated carbon.
  • the activated carbon which is added to the raw sugar juice may constitute 1 % to 5% by mass of the active ingredients added to the raw sugar juice.
  • the method may include additionally adding a reducing agent to the raw sugar juice.
  • the reducing agent may be in the form of a sulphite compound.
  • the sulphite compound may be in the form of potassium metabisulphite.
  • the method may include dosing the raw sugar by adding the following active ingredients in the following percentages by mass of the total amount of the active ingredients added to the raw sugar juice:
  • the composition in accordance with the invention is specifically formulated for use in the treatment of raw sugar juice prior to clarification of the juice in a sugar extraction process at a sugar mill.
  • Raw sugar juice typically contains a number of suspended impurities, such as waxes, gums, calcium phosphates, pigments and proteins.
  • the raw sugar juice often has an excess of colour due to pigmentation and/or oxidation, which needs to be reduced significantly.
  • the composition is particularly effective in clarifying the raw sugar juice and for causing adsorption and flocculation of the impurities thereby to facilitate their removal from the raw sugar juice.
  • the composition includes the following active ingredients in the following percentages by mass:
  • the composition includes the following active ingredients in the following percentages by mass: Anionic polyacrylamide 50%
  • the polyacrylamide and the sodium bentonite are flocculating agents which combine to fragment and cause flocculation of impurities, particularly protein- based impurities, in the raw sugar juice.
  • the Applicant has found that the anionic polyacrylamide supplied by Beijing Hengju, China, under the product codes "61418", “64026”, “64814" and “64876" are suitable for this purpose.
  • composition in this example includes the following active ingredients in the following percentages by mass:
  • the Applicant has found the cationic polyacrylamide supplied by Beijing Hengju, China, under the product code "81207" as being suitable.
  • the activated carbon is a decolourizing agent which has the effect of reducing colour and turbidity in the raw sugar juice.
  • the potassium metabisulphite is a reducing agent.
  • the invention extends to a method of treatment of raw sugar juice which includes combining the composition as described hereinabove and water to form a diluted composition. An effective amount of the diluted composition is thereafter added to the raw sugar juice for treating the raw sugar juice as described above.
  • the composition is combined with water to form the diluted composition containing about 0.05% by mass of the composition.
  • the Applicant envisages that the composition will, in use, be combined with the water to form the diluted composition containing 0.03% to 0.08% by mass of the composition.
  • the actual amount of the composition in the diluted composition will depend on the amount of impurities in the raw sugar juice which are to be removed.
  • the method includes dosing the raw sugar juice by adding an effective amount of the diluted composition to the raw sugar juice, in which the amount of the composition added to the raw sugar juice is between 4 and 7 milligrams of the composition per litre of the raw sugar juice.
  • the invention extends to a method of treatment of raw sugar juice which includes dosing the raw sugar juice by adding the following ingredients to the raw sugar juice: one of cationic and anionic polyacrylamide; sodium bentonite; activated carbon; and potassium metabisulphite
  • the total amount of the active ingredients which are added to the raw sugar juice is between 4 and 7 milligrams per litre of the raw sugar juice, wherein the polyacrylamide constitutes 50% by mass, the sodium bentonite constitutes 42% by mass, the activated carbon constitutes 2% by mass and the potassium metabisulphite constitutes 6% by mass of the total amount of the active ingredients added to the raw sugar juice.

Abstract

A writing training aid comprising a writing training kit for use in training persons to write. The writing training kit includes a planar member (10) having at least one slot (20) formed therein that defines a symbol which the person is to be trained to form in writing. The writing training kit includes an elongate body representing a writing instrument. The planar member has entrance and exit openings (22, 24) defined therein which lead into the slot (20) and which define initiation and termination positions, respectively, for the symbol to be formed. The planar member and the elongate body are configured to permit insertion of an end of the elongate body into an entrance opening, displacement of the elongate body along the slot and removal of the elongate body from an exit opening but to prevent removal of the elongate body from the slot intermediate the entrance and exit openings.

Description

A METHOD AND COMPOSITION FOR TREATING RAW SUGAR JUICE
FIELD OF INVENTION
This invention relates to a method of treating raw sugar juice. It relates also to a composition for use in the treatment of raw sugar juice.
Any reference herein to "raw sugar juice" must be interpreted to mean a reference to sugar juice which is at a stage in a sugar extraction process prior to clarification of the sugar juice.
SUMMARY OF INVENTION
According to a first aspect of the invention, there is provided a composition for use in the treatment of raw sugar juice, which includes the following active ingredients in the following percentages by mass:
20% - 70% of a polyamide flocculating component; and
20% - 70% of sodium bentonite; 1 % to 20% of a decolourizing agent, the polyamide flocculating component and the sodium bentonite being flocculating agents which combine to flocculate impurities in suspension in the raw sugar juice.
More specifically, the composition may include 40% to 60% by mass of the polyamide flocculating component and 30% to 55% by mass of the sodium bentonite.
The polyamide flocculating component may be in the form of a cationic polyacrylamide.
The polyamide flocculating component may be in the form of an anionic polyacrylamide.
The decolourizing agent may be activated carbon. More specifically, the composition may include 1 to 5% of the activated carbon.
The composition may include a reducing agent. More specifically, the reducing agent may be in the form of a sulphite compound. Yet more specifically, the sulphite compound may be in the form of potassium metabisulphite.
The composition may include the following active ingredients in the following percentages by mass:
50% polyacrylamide flocculating component;
42% sodium bentonite;
2% activated carbon; and
6% potassium metabisulphite. According to a second aspect of the invention, there is provided a method of treating raw sugar juice, which includes:
combining the composition as defined hereinabove in accordance with the first aspect of the invention, and water to form a diluted dosing composition; and
adding a predetermined effective amount of the dosing composition to the raw sugar juice.
The method may include combining the composition and the water to form said dosing composition containing 0.03% to 0.08% by mass of the composition.
The method may include combining the composition and the water to form said dosing composition containing about 0.05% by mass of the composition.
The method may include dosing the raw sugar juice by adding said effective amount of the dosing composition to the raw sugar juice, in which the amount of the composition added to the raw sugar juice is between 4 and 7 milligrams of the composition per litre of the raw sugar juice.
According to a third aspect of the invention there is provided a method of treating raw sugar juice, which includes dosing the raw sugar juice by adding the following active ingredients to the raw sugar juice:
a polyamide flocculating component;
of sodium bentonite; and
a decolourizing agent; wherein the total amount of the active ingredients added to the raw sugar juice is between 4 and 7 milligrams per litre of the raw sugar juice, and wherein the polyamide flocculating component constitutes 20% to 70% by mass, the sodium bentonite constitutes 20% to 70% by mass and the activated carbon constitutes 1 % to 20% by mass of the total amount of the active ingredients added to the raw sugar juice, the polyamide flocculating component and the sodium bentonite being flocculating agents which combine to flocculate impurities in suspension in the raw sugar juice.
The polyamide flocculating component may be in the form of a cationic polyacrylamide. Alternatively, the polyamide flocculating component may be in the form of an anionic polyacrylamide.
The decolourizing agent may be activated carbon.
The activated carbon which is added to the raw sugar juice may constitute 1 % to 5% by mass of the active ingredients added to the raw sugar juice.
The method may include additionally adding a reducing agent to the raw sugar juice.
The reducing agent may be in the form of a sulphite compound.
The sulphite compound may be in the form of potassium metabisulphite.
The method may include dosing the raw sugar by adding the following active ingredients in the following percentages by mass of the total amount of the active ingredients added to the raw sugar juice:
50% polyacrylamide flocculating component;
42% sodium bentonite;
2% activated carbon; and
6% potassium metabisulphite. DESCRIPTION OF PREFERRED EMBODIMENTS
The composition in accordance with the invention is specifically formulated for use in the treatment of raw sugar juice prior to clarification of the juice in a sugar extraction process at a sugar mill. Raw sugar juice typically contains a number of suspended impurities, such as waxes, gums, calcium phosphates, pigments and proteins. The raw sugar juice often has an excess of colour due to pigmentation and/or oxidation, which needs to be reduced significantly. The composition is particularly effective in clarifying the raw sugar juice and for causing adsorption and flocculation of the impurities thereby to facilitate their removal from the raw sugar juice. The composition includes the following active ingredients in the following percentages by mass:
Polyacrylamide 20% - 70%
Sodium bentonite 20% - 70%
Activated carbon 1 % - 20%
Potassium metabisulphite 1 % - 20%
Example 1
In a particular example wherein the composition is added to the raw sugar juice so as to cause impurities suspended in the sugar juice to flocculate and settle to the bottom of a vessel in which the sugar juice is held thereby facilitating the removal of the impurities, the composition includes the following active ingredients in the following percentages by mass: Anionic polyacrylamide 50%
Sodium bentonite 42%
Activated carbon 2%
Potassium metabisulphite 6%
The polyacrylamide and the sodium bentonite are flocculating agents which combine to fragment and cause flocculation of impurities, particularly protein- based impurities, in the raw sugar juice. The Applicant has found that the anionic polyacrylamide supplied by Beijing Hengju, China, under the product codes "61418", "64026", "64814" and "64876" are suitable for this purpose.
Example 2
In another example wherein the composition is added to raw sugar juice held in a flotation tank, the composition is added to the sugar juice causing flocculation and subsequent flotation of the impurities to the surface of the flotation tank where they can be skimmed off. The composition in this example includes the following active ingredients in the following percentages by mass:
Cationic polyacrylamide 50%
Sodium bentonite 42%
Activated carbon 2%
Potassium metabisulphite 6%
The Applicant has found the cationic polyacrylamide supplied by Beijing Hengju, China, under the product code "81207" as being suitable. The activated carbon is a decolourizing agent which has the effect of reducing colour and turbidity in the raw sugar juice.
The potassium metabisulphite is a reducing agent.
The invention extends to a method of treatment of raw sugar juice which includes combining the composition as described hereinabove and water to form a diluted composition. An effective amount of the diluted composition is thereafter added to the raw sugar juice for treating the raw sugar juice as described above.
Typically, the composition is combined with water to form the diluted composition containing about 0.05% by mass of the composition. The Applicant envisages that the composition will, in use, be combined with the water to form the diluted composition containing 0.03% to 0.08% by mass of the composition. The actual amount of the composition in the diluted composition will depend on the amount of impurities in the raw sugar juice which are to be removed.
The method includes dosing the raw sugar juice by adding an effective amount of the diluted composition to the raw sugar juice, in which the amount of the composition added to the raw sugar juice is between 4 and 7 milligrams of the composition per litre of the raw sugar juice. In accordance with another aspect of the invention, the invention extends to a method of treatment of raw sugar juice which includes dosing the raw sugar juice by adding the following ingredients to the raw sugar juice: one of cationic and anionic polyacrylamide; sodium bentonite; activated carbon; and potassium metabisulphite
The total amount of the active ingredients which are added to the raw sugar juice is between 4 and 7 milligrams per litre of the raw sugar juice, wherein the polyacrylamide constitutes 50% by mass, the sodium bentonite constitutes 42% by mass, the activated carbon constitutes 2% by mass and the potassium metabisulphite constitutes 6% by mass of the total amount of the active ingredients added to the raw sugar juice.

Claims

CLAIMS:
1. A composition for use in the treatment of raw sugar juice, which includes the following active ingredients in the following percentages by mass:
20% to 70% of a polyamide flocculating component;
20% to 70% of sodium bentonite; and
1 % to 20% of a decolourizing agent, the polyamide flocculating component and the sodium bentonite being flocculating agents which combine to flocculate impurities in suspension in the raw sugar juice.
2. The composition as claimed in claim 1 , wherein the polyamide flocculating component is in the form of a cationic polyacrylamide.
3. The composition as claimed in claim 1 or claim 2, wherein the polyamide flocculating component is in the form of an anionic polyacrylamide.
4. The composition as claimed in claim 2 or claim 3, wherein the decolourizing agent is activated carbon.
5. The composition as claimed in claim 4, wherein the composition includes 1 to 5% of the activated carbon.
6. The composition as claimed in claim 5, wherein the composition includes a reducing agent.
7. The composition as claimed in claim 6, wherein the reducing agent is in the form of a sulphite compound.
8. The composition as claimed in claim 7, wherein the sulphite compound is in the form of potassium metabisulphite.
9. The composition as claimed in claim 8, which includes the following active ingredients in the following percentages by mass:
50% polyacrylamide flocculating component;
42% sodium bentonite;
2% activated carbon; and
6% potassium metabisulphite.
10. A method of treating raw sugar juice, which includes:
combining the composition as claimed in any one of claims 1 to 10 and water to form a diluted dosing composition; and
adding a predetermined effective amount of the dosing composition to the raw sugar juice.
1 1. The method as claimed in claim 10, which includes combining the composition and the water to form said dosing composition containing 0.03% to 0.08% by mass of the composition.
12. The method as claimed in claim 1 1 , which includes combining the composition and the water to form said dosing composition containing about 0.05% by mass of the composition.
13. The method as claimed in any one of claims 10 to 12, which includes dosing the raw sugar juice by adding said effective amount of said dosing composition to the raw sugar juice, in which the amount of the composition added to the raw sugar juice is between 4 and 7 milligrams of the composition per litre of the raw sugar juice.
14. A method of treating raw sugar juice, which includes dosing the raw sugar juice by adding the following active ingredients to the raw sugar juice:
a polyamide flocculating component;
of sodium bentonite; and
a decolourizing agent; wherein the total amount of the active ingredients added to the raw sugar juice is between 4 and 7 milligrams per litre of the raw sugar juice, and wherein the polyamide flocculating component constitutes 20% to 70% by mass, the sodium bentonite constitutes 20% to 70% by mass and the activated carbon constitutes 1 % to 20% by mass of the total amount of the active ingredients added to the raw sugar juice, the polyamide flocculating component and the sodium bentonite being flocculating agents which combine to flocculate impurities in suspension in the raw sugar juice.
15. The method as claimed in claim 14, wherein the polyamide flocculating component is in the form of a cationic polyacrylamide.
16. The method as claimed in claim 14 or claim 15, wherein the polyamide flocculating component is in the form of an anionic polyacrylamide.
17. The method as claimed in claim 15 or claim 16, wherein the decolourizing agent is activated carbon.
18. The method as claimed in claim 17, wherein the activated carbon which is added to the raw sugar juice constitutes 1 % to 5% by mass of the active ingredients added to the raw sugar juice.
19. The method as claimed in claim 18, which includes additionally adding a reducing agent to the raw sugar juice.
20. The method as claimed in claim 19, wherein the reducing agent is in the form of a sulphite compound.
21. The method as claimed in claim 20, wherein the sulphite compound is in the form of potassium metabisulphite.
22. The method as claimed in claim 21 , which includes dosing the raw sugar by adding the following active ingredients in the following percentages by mass of the total amount of the active ingredients added to the raw sugar juice:
50% polyacrylamide flocculating component;
42% sodium bentonite;
2% activated carbon; and
6% potassium metabisulphite.
PCT/IB2008/051940 2007-05-16 2008-05-16 A method and composition for treating raw sugar juice WO2008139431A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2007/03952 2007-05-16
ZA200703952 2007-05-16

Publications (2)

Publication Number Publication Date
WO2008139431A2 true WO2008139431A2 (en) 2008-11-20
WO2008139431A3 WO2008139431A3 (en) 2009-03-19

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ZA (1) ZA200908892B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108842007A (en) * 2018-06-28 2018-11-20 广西科技大学 A kind of process reducing intensity of sulfitation and separated powder active carbon

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336041A (en) * 1970-04-29 1973-11-07 Henkel & Cie Gmbh Flocculating aqueous suspensions
GB1376725A (en) * 1970-11-13 1974-12-11 Avila Sa Purification process of raw beet juice plant therefor and juice so purified
US5262328A (en) * 1991-01-17 1993-11-16 Louisiana State University Board Of Supervisors Composition for the clarification of sugar-bearing juices and related products
WO1999024623A2 (en) * 1997-11-03 1999-05-20 Süd-Chemie AG Method for purifying the raw juice resulting from sugar refining
WO2005090611A1 (en) * 2004-03-16 2005-09-29 E.I. Dupont De Nemours And Company Sugar cane juice clarification process
EP1748086A1 (en) * 2005-07-27 2007-01-31 Süd-Chemie Ag Adsorbent and method for purification of crude sugar juice

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336041A (en) * 1970-04-29 1973-11-07 Henkel & Cie Gmbh Flocculating aqueous suspensions
GB1376725A (en) * 1970-11-13 1974-12-11 Avila Sa Purification process of raw beet juice plant therefor and juice so purified
US5262328A (en) * 1991-01-17 1993-11-16 Louisiana State University Board Of Supervisors Composition for the clarification of sugar-bearing juices and related products
WO1999024623A2 (en) * 1997-11-03 1999-05-20 Süd-Chemie AG Method for purifying the raw juice resulting from sugar refining
WO2005090611A1 (en) * 2004-03-16 2005-09-29 E.I. Dupont De Nemours And Company Sugar cane juice clarification process
EP1748086A1 (en) * 2005-07-27 2007-01-31 Süd-Chemie Ag Adsorbent and method for purification of crude sugar juice

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108842007A (en) * 2018-06-28 2018-11-20 广西科技大学 A kind of process reducing intensity of sulfitation and separated powder active carbon
CN108842007B (en) * 2018-06-28 2021-09-24 广西科技大学 Process method for reducing stoving intensity and separating powdered activated carbon

Also Published As

Publication number Publication date
ZA200908892B (en) 2010-08-25
WO2008139431A3 (en) 2009-03-19

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