Patent ID: 7498457

Claim:
A process for preparing solid particles comprising an essentially crystalline form of a compound of the formula (I): Wherein One of R 1 and R 2 independently of one another represents hydrogen or C 1 -C 4 alkyl and the other one represents C 3 -C 4 alkyl; x represents zero (direct bond) or a numeral from one to three; and Y represents groups of the partial formulae: Wherein One of R 1 ′ and R 2 ′ independently of one another represents hydrogen or C 1 -C 4 alkyl and the other one represents C 3 -C 4 alkyl; x represents zero (direct bond) or a numeral from one to three; y represents a numeral from two to ten; and z represents a numeral from two to six; characterized in that solid particles are prepared from a melt of a compound (I) by disintegration followed by full or partial solidification, the solid particles are added to a mixture of an organic water-miscible solvent and water to form a dispersion, and the crystals obtained from the dispersion are separated.