Dsm IP Assets B.v.

Cap III B.v.

Robert Geertman

Johan Thomas Tinge

Igor Galaev

Geert Ekkelenkamp

Johannes Elisabeth Pierre Debeij

Peter Van Ysacker

Peter Ysacker Van

The present invention relates to a composition comprising one or more steviol glycosides which composition comprises kaurenoic acid in an amount of no more than 150 ppm. The invention also relates to a method for preparing a steviol glycoside composition, which method comprises: providing a steviol glycoside composition; combining the steviol glycoside composition with a solvent to form a steviol glycoside solution; and crystallizing a steviol glycoside composition from the steviol glycoside solution, wherein the crystallization is carried out at pH7.0 or below. The invention also relates to a method for reducing the kaurenoic acid content of a steviol glycoside composition, which method comprises: providing a steviol glycoside composition which comprises kaurenoic acid; combining the steviol glycoside composition with a solvent to form a steviol glycoside solution; and crystallizing a steviol glycoside composition from the steviol glycoside solution, wherein the crystallization is carried out at pH7.0, thereby to reduce the amount of kaurenoic acid in the steviol glycoside composition.

Steviol glycoside composition

The present invention relates to a composition comprising one or more steviol glycosides which composition comprises nitrogen in an amount of no more than about 1000 ppm. The invention also relates to a method for preparing a steviol glycoside composition, which method comprises: providing a steviol glycoside composition; combining the steviol glycoside composition with water to form a steviol glycoside solution; and crystallizing a steviol glycoside composition from the solution. The invention also relates to a method for reducing the nitrogen content of a steviol glycoside composition, which method comprises: providing a steviol glycoside composition which comprises nitrogen; combining the steviol glycoside composition with water to form a steviol glycoside solution; and crystallizing a steviol glycoside composition from the solution, thereby to reduce the amount of nitrogen in the steviol glycoside composition.

Method for preparing a steviol glycoside composition

The present invention provides a continuous process for producing ammonium sulfate crystals, wherein said process comprises: i) feeding to a series of crystallization sections, which crystallization sections are heat integrated in series, a solution of ammonium sulfate; ii) crystallizing ammonium sulfate crystals from said solution of ammonium sulfate; iii) purging a fraction of the solution of ammonium sulfate from each of said crystallization sections; and iv) discharging ammonium sulfate crystals from each crystallization section, characterized in that: a fraction of said solution of ammonium sulfate is purged from at least one crystallization section to at least one other crystallization section; and an apparatus suitable for producing ammonium sulfate crystals.

Process for producing ammonium sulfate crystals

The present invention provides a continuous process for producing ammonium sulfate crystals, wherein said process comprises: Further provided is apparatus suitable for producing ammonium sulfate crystals.

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Echt, Netherlands

Robert Geertman