Enzymatic process for treating xanthan gums in order to improve the filterability of their aqueous solutions
US4904586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | May 5, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P19/06
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Process for treating a xanthan gum in order to improve the filterability of its aqueous solutions, comprising an enzymatic treatment of an aqueous solution of xanthan gum containing, as dissolved salts, a proportion of alkali and/or alkaline-earth metals of at least 10.sup.-2 equivalent/liter, said treatment being performed by means of two enzyme extracts of different types, a so-called PG enzyme having as main activity a polygalacturonase activity and a so-called P enzyme extract whose main activity is a protease activity, in conditions compatible with the activity of said enzyme extracts. The obtained xanthan gum powder or solution can be used as enhanced oil recovery agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.