The present invention relates to a new process for the preparation of ammeline and/or ammelide from melamine by a solid-to-solid reaction in an aqueous reaction mixture comprising a biocatalyst, wherein the biocatalyst comprises at least one enzyme belonging to the amidohydrolase superfamily and having aminohydrolase activity towards 1,3,5-triazine compounds. The invention further relates a product obtainable by the process according to the invention, wherein the product comprises ammeline and/or ammelide.

The present invention relates to a new process for the preparation of ammeline and/or ammelide from melamine by a solid-to-solid reaction in an aqueous reaction mixture comprising a biocatalyst, wherein the biocatalyst comprises at least one enzyme belonging to the amidohydrolase superfamily and having aminohydrolase activity towards 1,3,5-triazine compounds. The invention further relates a product obtainable by the process according to the invention, wherein the product comprises ammeline and/or ammelide.