Crystalline mixture solid containing maltitol and a process for

Details Crystalline mixture solid containing maltitol and a process for Crystalline mixture solid containing maltitol and a process for

1992-02-24

1994-10-11

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

127 15, 127 16, 127 30, 127 58, 127 60, 568863, 568872, 426658, 426660, C07H 1504, C07H 304

Patent

active

053548566

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a crystalline mixture solid containing maltitol and a process for producing it. Particularly, the present invention relates to a crystalline mixture solid containing maltitol having an improved physical properties and a process for producing it.


BACKGROUND ARTS

Sugar alcohols such as sorbitol and mannitol have hitherto been known to have crystals or crystalline mixture solids, and a variety of methods for producing them have already been known.
In contrast with mannitol or sorbitol of which cystals have hitherto been known, maltitol tends to form a supersaturated state more readily and thus hardly forms a crystal. The methods for producing a crystal or a crystalline mixture solid of it have been invented only recently, and it was believed impossible to produce a crystal from maltitol prior to this invention as described by JIRO NIKUNI, DENPUN KAGAKU HANDBOOK, lines 14 and 17-18 of p. 461 (published from ASAKURA SHOTEN, Jul. 20, 1977).
The crystals of maltitol or the crystalline mixture solid containing maltitol have been prepared for the first time on 1981, and the method for producing them are disclosed in TOKKYO-KOKOKU-KOHO (Publication for Opposition of Examined Patent Application) SHOWA 63(1988)--2439.
The crystalline mixture solid containing maltitol holds a place in its commercial market more important than crystals obtained by the fractional crystallization method because of its excellent properties and economical reasons.
The crystalline mixture solid containing maltitol, however, has many ambiguous points on the physical behaviors for producing its crystalline mixture solid, as it is not long since the discovery of the crystalline mixture solid containing maltitol and it tends to form a supersaturated state very easily. Therefore, the crystalline mixture solid containing maltitol was produced only by a limited method.
The method for producing the crystalline mixture solid containing maltitol disclosed in the aforementioned TOKKYO-KOKOKU-KOHO comprises dissolving maltitol having a purity of 65% or more (unless otherwise described, % means % by weight hereinafter) into water to form an aqueous solution of maltitol having a concentration of about 65-95%, and forming a mascuite by the co-existence of a seed crystal. Such method in itself is provided for any one of the well-known methods of a block grinding method, a fluidized drying method or a spray-drying method.
For example, the spray-drying method is generally a method which comprises spraying a mascuite having a concentration of about 70-85% and a crystallization rate in the range of about 25-60% from a nozzle of a high-pressure pump and maturing the sprayed mascuite under the hot air at a temperature of 60.degree.-100.degree. C. which will not cause the melting of crystalline powder for about 1-20 hours.
The block grinding method is generally a method which comprises standing a mascuite having a water of about 5-15% and a crystallization rate in the range of 10-60% for 0.5-5 days to crystallize and solidify the whole of the mascuite in the form of a block, which is then ground by a grinding or cutting method and dried.
Among these methods, the block grinding method, in spite of its complicated processes, is used as a major method for producing the crystalline mixture solid containing maltitol for the reasons that each process can be carried out relatively readily and that the scale of the installation and the process costs are cheaper as compared with those of the other two methods.
The crystalline mixture solid containing maltitol obtained by these methods had an apparent specific gravity in the range of about 0.43-0.59 in the form of a powder having a particle size of 20-50 mesh and was lighter than the other sugar alcohols such as sorbitol or the like. Furthermore, the crystalline mixture solid containing maltitol had a high oil absorptivity in the range of 15-22%, and a relatively thin porous crystalline structure was observed with a scanning electron micrograph having a magnification of a

REFERENCES:
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patent: 5045340 (1991-09-01), Kohler
patent: 5133807 (1992-07-01), DeCremoux
patent: 5141859 (1992-08-01), Niimi et al.

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