Jump to main content
Jump to site search

Issue 26, 2018
Previous Article Next Article

Effect of surface scraping on chiral symmetry in seeded cooling crystallization of sodium chlorate

Author affiliations

Abstract

We report, for the first time, that the number of nuclei with opposite handedness to seed is directly related to the amount of scraping generated between baffle edge and wall surface in an oscillatory baffled crystalliser (OBC) and reaches an asymptotical maximum of 43.4%, when primary nucleation events due to scraping dominate over secondary nucleation by seeding in a daylong operation. The 6.6% shortfall to the theoretical symmetry of 50% : 50% of dextrorotatory to laevorotatory crystals could be a quantitative indication of the remaining effect of secondary nucleation. We examine the effect of scraping durations at a fixed seeding time and the effect of seeding times at a fixed oscillation period on chiral symmetry. Based on our experimental data, the rate of primary nucleation events due to scraping and the rate of secondary nucleation due to seeding are evaluated. We show that the relative importance of primary to secondary nucleation in seeded cooling crystallisation of sodium chlorate can be varied by the amount of scrapping in the OBC.

Graphical abstract: Effect of surface scraping on chiral symmetry in seeded cooling crystallization of sodium chlorate

Back to tab navigation

Publication details

The article was received on 18 Apr 2018, accepted on 06 Jun 2018 and first published on 06 Jun 2018


Article type: Paper
DOI: 10.1039/C8CE00626A
Citation: CrystEngComm, 2018,20, 3696-3701
  •   Request permissions

    Effect of surface scraping on chiral symmetry in seeded cooling crystallization of sodium chlorate

    R. Macleod and X. Ni, CrystEngComm, 2018, 20, 3696
    DOI: 10.1039/C8CE00626A

Search articles by author

Spotlight

Advertisements