Process for producing a high-purity maltose
AssigneeKabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
InventorsToshio Miyake, Shuzo Sakai, Takashi Shibuya
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Abstract
High-purity maltose is produced by applying a feed starch sugar solution with a maltose content of at least 70% to a column packed with a strongly-acidic cation exchange resin of alkali metal- or alkaline earth metal-form; fractionating the feed solution by charging water thereto into a high-dextrin fraction, a high-dextrin.maltose fraction, a high-maltose fraction, a high-maltose.glucose fraction, and a high-glucose fraction, in the given order; and recovering the high-maltose fraction. This process constantly provides a fraction with a maltose content of 93% or higher, and enables industrial-scale production of a high-purity maltose much easier and at lower-cost than conventional processes.
Claims7
A process for the separation of maltose from a feed solution by the utilization of an ion exchange resin, comprising:
- (a) providing a feed solution containing at least 70% maltose based on the weight of the dry solid, the remainder consisting essentially of glucose and dextrins;
- (b) sequentially admitting predetermined volumes of the feed solution and water to a column of a strongly acidic cation exchange resin having sulphonyl groups of an alkali metal or alkaline earth metal form;
- (c) sequentially separating the effluents from the column into the following fractions:
- a first fraction rich in dextrins,
- a second fraction rich in dextrins, but highly contaminated with maltose,
- a third fraction of substantially pure maltose,
- a fourth fraction rich in maltose, but highly contaminated with glucose, and
- a fifth fraction rich in glucose;
- (d) recovering the third fraction of substantially pure maltose;
- (e) sequentially admitting into the column:
- the second fraction obtained in the step (c),
- a feed solution having a maltose content of at least 70% based on the weight of dry solid, and the remainder consisting essentially of glucose and dextrin,
- the fourth fraction obtained in the step (c), and
- water;
- and
- (f) repeating steps (c), (d) and (e) in a cyclic manner.
Dependencies are inferred from the claim text.