Process to prepare maltose powder

• US 5,112,407 A
• Filed: 05/22/1990
• Issued: 05/12/1992
• Est. Priority Date: 05/29/1987
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kaguku Kenkyujo
• Original Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kaguku Kenkyujo
• Inventors: Akai, Hiroshi, Miyake, Toshio, Sakai, Shuzo
• Primary Examiner(s): Morris, Theodore
• Assistant Examiner(s): HAILEY, PATRICIA L
• Application Number:
  US07/526,958
• Time in Patent Office: 721 Days
• Field of Search: 127/58, 127/60, 127/61, 435/95, 435/99, 536/100, 536/124, 536/127
• US Class Current: 127/58
• CPC Class Codes: C13K 7/00 Maltose

Abstract

There is provided a process to prepare maltose powder containing crystalline beta-maltose hydrate, comprising concentrating an aqueous solution of a high-purity maltose having a maltose content of at least 85% DS to a moisture content below 10 w/w %, partially crystallizing alpha-maltose in the syrup, and crystallizing beta-maltose hydrate in the same syrup while converting the resultant crystalline alpha-maltose into crystalline beta-maltose hydrate. Use of the invention enables consistently high-quality maltose powders at a reduced drying cost.

Claims

1. A process for preparing crystalline β

-maltose hydrate consisting essentially of;

(a) concentrating an aqueous solution of a high=purity maltose having a maltose content of at least 85% by weight, on a dry solids basis, to a moisture content below 10% by weight;

(b) crystallizing α

-maltose in the resultant high=concentration syrup to increase the moisture content in the amorphous part of the syrup while maintaining the syrup at a temperature in the range of 60°

-120°

C. in the presence of crystalline α

-maltose seed or a mixture of crystalline α

-maltose seed with crystalline β

-maltose hydrate;

(c) converting said crystalline α

-maltose in the resultant mixture to β

-maltose hydrate while maintaining the mixture at a temperature below the temperature used in (b) in the range of 20-70°

C.; and

(d) pulverizing the mixture mainly composed of crystalline β

-maltose hydrate.

2. The process according to claim 1 wherein said high-concentration syrup has a moisture content in the range of 5.0 to 8.0% by weight.

3. A process for preparing cyrstalline β

-maltose hydrate consisting of;

(a) concentrating an aqueous solution of a high-purity maltose having a maltose content of at least 85% by weight, on a dry solids basis, to provide a high-concentration syrup having a moisture content below 10% by weight;

(b) crystallizing α

-maltose in the resultant high-concentration syrup to increase the moisture content in an amorphous part of the syrup while maintaining the syrup at a temperature in the range of 60°

-120°

C., said crystallizing being carried out in the presence of crystalline α

-maltose seed or a mixture of crystalline α

-maltose seed with crystalline β

-maltose hydrate;

(c) converting said crystalline α

-maltose in the resultant mixture to β

-maltose hydrate while maintaining the mixture at 20°

-70°

C.; and

(d) pulverizing the mixture mainly composed of crystalline β

-maltose hydrate.