Global Patent Index - EP 1056782 A1

EP 1056782 A1 2000-12-06 - METHOD FOR PRODUCING PRECIPITATED STARCH ESTERS

Title (en)

METHOD FOR PRODUCING PRECIPITATED STARCH ESTERS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON GEFÄLLTEN STÄRKEESTERN

Title (fr)

PROCEDE DE PREPARATION D'ESTERS D'AMIDON PRECIPITES

Publication

EP 1056782 A1 (DE)

Application

EP 99967879 A

Priority

  • DE 9903943 W
  • DE 19857995 A

Abstract (en)

[origin: DE19857995A1] The invention relates to a cost-effective method for producing precipitated starch esters consisting of carboxylic reaction solutions. The starch esters obtained by the inventive method are particularly suitable for producing dry blends or for further processing in the form of a dispersion by virtue of the large surface of the starch ester particles. The method is characterised in that the main portion of the carboxylic acid is reduced to a radical carboxylic acid content greater than 0.5 percent by weight carboxylic acidic esters reaction mixtures in a predrying step and in that a dispersion of the acidic ester particles is produced by means of subsequent water treatment or processing with C1 to C4 alcohol. Said dispersion contains only small amounts of carboxylic acid. Fine, porous starch ester particles with a large surface and good processing properties are obtained by separating, washing and drying said dispersion.

IPC 1-7 (main, further and additional classification)

C08B 31/04

IPC 8 full level (invention and additional information)

C08B 31/04 (2006.01); C08B 37/00 (2006.01)

CPC (invention and additional information)

C08B 31/04 (2013.01); C08B 37/0003 (2013.01)

Citation (search report)

See references of WO 0035958A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19857995 A1 20000621; EP 1056782 A1 20001206; WO 0035958 A1 20000622

INPADOC legal status


2002-06-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20011026

2001-08-01 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010615

2000-12-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000912

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE