초록 ▼

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 10-2 equivalent/liter, said treat

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 10-2 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.

대표청구항 ▼

A process of improving the filterability of an aqueous xanthan gum solution containing at least 10-2 equivalent/liter of a salt selected from the group consisting of alkali metal salts, alkaline earth-metal salts and mixtures thereof, comprising contacting said solution with an enzyme extract exhibi

A process of improving the filterability of an aqueous xanthan gum solution containing at least 10-2 equivalent/liter of a salt selected from the group consisting of alkali metal salts, alkaline earth-metal salts and mixtures thereof, comprising contacting said solution with an enzyme extract exhibiting predominately polygalacturonase activity and an enzyme extract exhibiting predominately protease activity to enzymatically treat said aqueous xanthan gum solution.