Screening for optimal yield in the crystallization of...

Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having growth from a solution comprising a solvent which is...

Reexamination Certificate

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C117S069000, C117S070000, C117S202000, C422S245100

Reexamination Certificate

active

07025828

ABSTRACT:
A method of determining the optimal yield of a target compound includes the steps of:(a) determining the initial composition of a mixture of compounds containing the target compound;(b) dissolving the mixture in a solvent;(c) placing a quantity of the solution in a plurality of vessels;(d) optionally, placing a portion of a different derivatising agent in each vessel;(e) causing crystallisation to occur;(f) analysing the contents of the vessels after the crystallisation has approached equilibrium to determine the compositions of the liquors and the compositions of the solids; and(g) comparing the compositions determined in step (f) to profile the performance of each system in terms of the projected maximum yield of target compound is an optimised crystallisation process.

REFERENCES:
patent: 0 553 539 (1993-08-01), None
Smith, A.A., Calculation of the efficiency of purification by crystallization of ideal multicomponent stereoisomeric mixtures; Tetrahedron: Asymmetry, Elsevier Science Publishers, Amsterdam, NL; vol. 9, No. 16; Aug. 1, 1998 pp. 2925-2937.

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