Patent ID: 8357302
Filing Date: 2013-01-22
Classification: B01D

Abstract:
1. A process for producing a solid organic chemical reaction product from starting materials that react to produce a product mixture comprising said reaction product and impurities, said process comprising: (a) reacting said starting materials in a liquid reaction medium to produce said product mixture and crystallizing reaction product from said product mixture; (b) filtering said product mixture to produce (i) a filter cake containing said crystallized reaction product and (ii) a filtrate containing dissolved solutes including dissolved reaction product and dissolved impurities; (c) passing said dissolved solutes through a simulated moving bed chromatography system to produce a first liquid stream depleted in said dissolved reaction product and a second liquid stream depleted in said dissolved impurities; (d) continuously recycling said second liquid stream to said liquid reaction medium of step (a); and (e) recovering said crystallized reaction product.