US3481783A - Molasses purification - Google Patents

Molasses purification Download PDF

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Publication number
US3481783A
US3481783A US662878A US3481783DA US3481783A US 3481783 A US3481783 A US 3481783A US 662878 A US662878 A US 662878A US 3481783D A US3481783D A US 3481783DA US 3481783 A US3481783 A US 3481783A
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US
United States
Prior art keywords
molasses
mud
sugars
sugar
lime
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
Application number
US662878A
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English (en)
Inventor
Hans-Jurgen Von Der Linde
Wilhelm Haberich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BMA Braunschweigische Maschinenbauanstalt AG
Original Assignee
BMA Braunschweigische Maschinenbauanstalt AG
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.)
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Publication date
Application filed by BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Application granted granted Critical
Publication of US3481783A publication Critical patent/US3481783A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B35/00—Extraction of sucrose from molasses
    • C13B35/02—Extraction of sucrose from molasses by chemical means
    • C13B35/06—Extraction of sucrose from molasses by chemical means using ion exchange

Definitions

  • Liquid sugar is obtained from cane molasses by subecting the molasses to two defeco-saturation treatments at different pH before they are passed into an ion exchanger.
  • This invention relates to the production of an only slightly colored liquid sugar of high purity from cane molasses by means of ion exchange resins.
  • molasses contain a number of various coloring agents the constitution of which is not completely known. Part of such coloring agents is retained by ion exchangers; however, certain coloring agents which are found especially in cane molasses, are not bound by ion exchangers and impart an intense yellow color to the juices from which the salts have been removed by ion exchangers.
  • said objects are attained by applying to the cane molasses, before they are subjected to an ion exchanger purification, the following pretreatment:
  • the molasses is diluted to about 35 Bx. and the mud substances contained therein are removed, preferably by separation;
  • a defeco-saturation is carried out at a temperature up to 45 C., preferably below 40 C., with lime and carbon dioxide at a pH of -12, preferably about 10.5, with an amount of lime corresponding to 30 to 60 percent of CaO, calcu- 3,481,783 Patented Dec.
  • the formed mud is filtered off, and finally the filtrate is brought, by a second defecosaturation with lime and carbon dioxide, to a pH of 8- 8.5, whereby 3 to 6, preferably 5% of lime, calculated on the non-sugars of the original molasses, are used and filtered again.
  • the invention is based on the discovery that it is possible to remove, prior to the treatment with ion exchange resins, a considerable amount of the non-sugars and the major part of coloring substances not removed by the ion exchangers, when the juice is subjected to a specific prepurification procedure.
  • the first step the removal of the mud substances contained in the molasses by dilution of the molasses to about 35 Bx. and subsequent separation, filtration, or decantation can be carried out in apparatus known for this purpose, preferably in separators, and with advantage at room temperature.
  • the second step i.e. the defecosaturation with lime and carbon dioxide at a pH of 10-12, preferably 10.5
  • a pH of 10-12 preferably 10.5
  • a temperature adjustment to a bout 45 C., preferably below 40 C. has the result that a decomposition of the invert sugar in the alkaline range, in which new coloring substances and water soluble calcium salts are formed, is substantially avoided.
  • the subsequent treatment of the juice consists in a treatment with cation-anion exchangers, as described for instance, in the journal Zucker, vol. 15 (1962), pp. 340-345.
  • the deionized juice is concentrated to about BX., e.g., by means of flash boilers.
  • the sugar containing waste waters of the muds below about Bx. and those of the ion exchange plant, as far as not incorporated in the purified juice, are used to dilute the molasses.
  • a single defeco-saturation at a pH below 10 does not retain sufiiciently those coloring substances which are difiiculty removed in the ion exchangers.
  • the degree of the nonsugar removal and juice decoloration can be widely varied during the pre-purification by the amount of the lime added.
  • liquid sugar of a purity up to 99% total sugar/TS and a color of 3-5 St. are obtained.
  • Such products known on the market as Golden syrup, are used in the food and beverage industry.
  • the solutions fed into the ion exchangers are completely free of colloids, fats, and waxes, thereby preventing capacity losses of the ion exchange plant by irreversible loads.
  • the solution is separated in a mud separator at C. After removal of the mud, the solution has still 44.4%
  • the solution is defeco-saturated with 50% CaO, calculated on the non-sugars of the starting molasses at a pH of 10.7 and a temperature of 2532 C., and with CO and the mud is filtered ofi.
  • the filtrate contains of non-sugars/TS and has a color of 320 St.
  • the removed amount of non-sugars corresponds to percent of the original content.
  • the filtrate is defeco-saturated with 3% of CaO, calculated on non-sugars of the starting molasses, and CO thereby, the pH value gradually drops to 8.5.
  • the filtrate of the mud contains 32.5 percent of non-sugars/TS and has a color of 330 St.
  • the thus obtained juice is desalted in cation-anion exchangers, concentrated in vacuo at 70 to 80 C. to 75 Bx. and produces a liquid sugar of 98.9 percent total sugar purity and a color of 7.4 St.
  • a process of preparing liquid sugar of high purity and low color from cane molasses comprising diluting cane molasses to 35 Brix, removing mud substances, then subjecting the diluted molasses to a defeco-saturation at a temperature not higher than C.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US662878A 1966-08-25 1967-08-24 Molasses purification Expired - Lifetime US3481783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0088619 1966-08-25

Publications (1)

Publication Number Publication Date
US3481783A true US3481783A (en) 1969-12-02

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US662878A Expired - Lifetime US3481783A (en) 1966-08-25 1967-08-24 Molasses purification

Country Status (3)

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US (1) US3481783A (de)
AT (1) AT268165B (de)
DE (1) DE1567248A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975205A (en) * 1973-12-14 1976-08-17 Suddeutsche Zucker-Aktiengesellschaft Process for working up molasses
US4193817A (en) * 1979-03-22 1980-03-18 Illinois Water Treatment Production of bottler's liquid sugar

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727738A (en) * 1926-09-13 1929-09-10 Gerhard Elias Van Nes Purification of liquids containing sugar
US2075127A (en) * 1936-04-27 1937-03-30 Nat Grain Yeast Corp Clarification of molasses
US2093759A (en) * 1936-04-14 1937-09-21 Petree & Dorr Engineers Inc Sugar juice clarification
US2697049A (en) * 1949-06-03 1954-12-14 Brieghel-Muller Arne Vigand Lime-carbonation method of refining sugar solutions
US2774693A (en) * 1950-03-24 1956-12-18 Danske Sukkerfab Method for purifying sugar juices by liming and carbonation
US2868677A (en) * 1956-07-30 1959-01-13 Ultra Sucro Company Clarification and demineralization process for b-molasses and similar materials containing concentrated impurities
US2916404A (en) * 1954-12-06 1959-12-08 Battistoni Giovanni Process for extracting sugar from molasses
US3257236A (en) * 1964-07-07 1966-06-21 Nat Sugar Refining Company Method of making sugar

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727738A (en) * 1926-09-13 1929-09-10 Gerhard Elias Van Nes Purification of liquids containing sugar
US2093759A (en) * 1936-04-14 1937-09-21 Petree & Dorr Engineers Inc Sugar juice clarification
US2075127A (en) * 1936-04-27 1937-03-30 Nat Grain Yeast Corp Clarification of molasses
US2697049A (en) * 1949-06-03 1954-12-14 Brieghel-Muller Arne Vigand Lime-carbonation method of refining sugar solutions
US2774693A (en) * 1950-03-24 1956-12-18 Danske Sukkerfab Method for purifying sugar juices by liming and carbonation
US2916404A (en) * 1954-12-06 1959-12-08 Battistoni Giovanni Process for extracting sugar from molasses
US2868677A (en) * 1956-07-30 1959-01-13 Ultra Sucro Company Clarification and demineralization process for b-molasses and similar materials containing concentrated impurities
US3257236A (en) * 1964-07-07 1966-06-21 Nat Sugar Refining Company Method of making sugar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975205A (en) * 1973-12-14 1976-08-17 Suddeutsche Zucker-Aktiengesellschaft Process for working up molasses
US4193817A (en) * 1979-03-22 1980-03-18 Illinois Water Treatment Production of bottler's liquid sugar

Also Published As

Publication number Publication date
DE1567248A1 (de) 1970-06-25
AT268165B (de) 1969-02-10

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