Cargill Inc.

Sanofi

Jean-Pierre Lhonneur

Jacques André Christian Mazoyer

Jacques Mazoyer

Jacky Lefrancois

There is provided a process for the preparation of purified &#x3b2;-(1,3)-D-glucans, comprising the steps of providing an aqueous &#x3b2;-(1,3)-D-glucan initial solution having a pH of above 11.0, filtering the aqueous &#x3b2;-(1,3)-D-glucan initial solution to obtain a &#x3b2;-(1,3)-D-glucan containing filtrate, adjusting the pH of the &#x3b2;-(1,3)-D-glucan containing filtrate with an acid to a pH of below 5.0 to obtain an acidic &#x3b2;-(1,3)-D-glucan solution, and heating the acidic &#x3b2;-(1,3)-D-glucan solution to a temperature in the range of 60 to 160&#xb0; C.

Process for the preparation of purified &#x3b2;-(1,3)-D-glucans

There is provided a process for the preparation of purified &#x3b2;-(1,3)-D-glucans, comprising the steps of providing an aqueous &#x3b2;-(1,3)-D-glucan initial solution having a pH of above 11.0, filtering the aqueous &#x3b2;-(1,3)-D-glucan initial solution to obtain a &#x3b2;-(1,3)-D-glucan containing filtrate, adjusting the pH of the &#x3b2;-(1,3)-D-glucan containing filtrate with an acid to a pH of below 5.0 to obtain an acidic &#x3b2;-(1,3)-D-glucan solution, and heating the acidic &#x3b2;-(1,3)-D-glucan solution to a temperature in the range of 60 to 160&#xb0;C.

There is provided a process for the preparation of purified &#x3b2;-(1,3)-D-glucans, comprising the steps of providing an aqueous &#x3b2;-(1,3)-D-glucan initial solution having a to pH of above 11.0, filtering the aqueous &#x3b2;-(1,3)-D-glucan initial solution to obtain a &#x3b2;-(1,3)-D-glucan containing filtrate, adjusting the pH of the &#x3b2;-(1,3)-D-glucan containing filtrate with an acid to a pH of below 5.0 to obtain an acidic &#x3b2;-(1,3)-D-glucan solution, and heating the acidic &#x3b2;-(1,3)-D-glucan solution to a temperature in the range of 60 to 160&#xb0; C.

The invention relates to a method of drying carrageenans extracted from red algae by alkaline treatment in an aqueous medium. This method consists in subjecting the moist fibers to the action of microwaves at 100 to 10,000 MHz in such a way that the temperature of the mass does not exceed 100.degree. C. Application: preparation of carrageenans.

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Carentan, France

Jean-Pierre Lhonneur