Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Patent
1999-08-19
2000-08-08
Geist, Gary
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
127 463, C07B 6300, C07C22912
Patent
active
060996544
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a process for recovering betaine, and more particularly to a process for recovering high-purity betaine from waste in the beet sugar industry. Herein, the term "waste in the beet sugar industry" indicates waste produced in the course of separation and recovery of sucrose from sugar beet extract or sugar beet molasses with a 2-component separation simulated moving bed chromatographic separator using a strongly acidic cation exchange resin in a salt form as chromatographic packing. The term "from sugar beet extract" as used in the present invention is intended to mean "starting from extract" obtained through the extraction step during the course of refining and recovery of sucrose from sugar beet according to a variety of process comprising a series of steps of cutting, extraction, filtration, softening, chromatographic separation, etc. Thus, a solution to be subjected to the above-mentioned step of chromatographic separation is of course a solution obtained after various necessary steps taken beforehand. In this respect, the term "from sugar beet molasses" is intended to have the same meaning as described above. Incidentally, betaine is a substance occurring in roots, grains and stems of various plants and contained in a comparatively large amount in sugar beet in particular, and is a useful substance which is used as animal feed, a starting material of pharmaceutical preparations, a staring material of cosmetic preparations, etc.
BACKGROUND ART
The following 3 methods are known as examples of the conventional betaine recovery methods.
A method (1) is one as disclosed in claim 1 of Japanese Patent Publication No. 50,895/1990 wherein diluted molasses having a solids content of 20 to 50 wt. % is batchwise passed through a chromatographic column packed with a strongly acidic cation exchange resin (crosslinked with 2 to 12 wt. % of divinylbenzene) in the form of an alkaline metal salt at a resin bed height of 2.5 to 10 m to recover a betaine fraction (see the flow chart of FIG. 2 for further particulars).
A method (2) is one as disclosed in claims 2 and 3 of Japanese Patent Publication No. 50,895/1990 wherein a crude betaine solution (betaine fraction) obtained according to the foregoing method of claim 1 is batchwise passed through the foregoing chromatographic column (claim 2) to recover a higher-purity betaine fraction while a lower-purity betaine fraction obtained at this time is also separately recovered and recirculated (claim 3) to recover betaine in this fraction as well (see the flow chart of FIG. 3 for further particulars).
A method (3) is one as disclosed in Proceedings of the Research Society of Japan Sugar Refineries' Technologists, Vol. 41 pp. 29-36 (1993) wherein molasses produced in a beet sugar factory where a method of manufacturing sucrose by ion exchange refining is adopted is separated with a multi-component separation simulated moving bed chromatographic separator to recover betaine (see the flow chart of FIG. 4 for further particulars).
The foregoing conventional methods of recovering betaine are all used for a solution having a comparatively low salts concentration with no consideration given to the fact that the ionic form of the cation exchange resin is changed by salts.
However, waste produced in the course of separation and recovery of sucrose from sugar beet extract or sugar beet molasses with a 2-component separation simulated moving bed chromatographic separator using a strongly acidic cation exchange resin in a salt form as chromatographic packing contains 5-20 wt. % sucrose, 40-75 wt. % salts, 5-20 wt. % betaine, 1-10 wt. % monosaccharides and 0.5-5 wt. % unknown substances based on solids (i.e., based on dry solids). Thus, when this waste is concentrated to a solids content of about 50% (weight/solution weight), the salts concentration of the resulting concentrate becomes several in normality.
When such salts-rich waste derived from a plant (e.g., beet) or its concentrate is passed as a starting solution material through a ch
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Database WPI, Section Ch, Week 9420, Derwent Publications Ltd., London, G.B.; Class D13, An 94-163887, XP002098451, & JP 06 107611 (Hokuren Nogyo Kyodo Kumiai), Apr. 19, 1994.
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Kaneko Kikuzo
Masuda Takayuki
Matsuda Fumihiko
Sato Kohei
Tanikawa Kouji
Geist Gary
Maier Leigh C.
Organo Corporation
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