METHOD OF PRODUCTION OF PARTICLES Russian patent published in 2006 - IPC B01J2/02 

FIELD: chemical industry; other industries; methods of production of the particles with the preset size and /or the certain crystalline form.

SUBSTANCE: the invention is pertaining to the method of production of the particles, in particular, to production of the particles having the preset size and-or the certain crystalline form. The method provides for: (1) making the contact with the first dissolvent of the composition containing the indicated substance and the second dissolvent in the flow-running mixer, in the result of which the second dissolvent is separated from the substance with the help of the first dissolvent; (2) as the alternative the method provides for making the contact with the first dissolvent of the indicated substance with formation of the mixture and separation of the indicated mixture by means of the process causing extraction of at least some amount of the indicated substance from the first dissolvent. At that the process of separation includes transition of the mixture from the first zone with the pressure of P₁ in the second zone with pressure_{ofP2, at that the value of P1 exceeds the value ofP2. At realization of the complex of the (1) and (2) operations the first dissolvent making the contact with the composition or the substance represents fluorinated C1-C4 hydrocarbon in the liquid state. The invention ensures production of the particles of the substance without breakup of the crystalline form of the material.}

EFFECT: the invention ensures production of the particles of the substance without breakup of the crystalline form of the material.

21 cl, 2 dwg, 2 ex