Preparation of Lucas reagent of enhanced utility and its use in

Details Preparation of Lucas reagent of enhanced utility and its use in Preparation of Lucas reagent of enhanced utility and its use in

1998-09-09

2000-02-01

Wood, Elizabeth D

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Halogen or compound containing same

502224, B01J 27138

Patent

active

06020284&

ABSTRACT:
Gaseous anhydrous hydrogen chloride is introduced into an aqueous solution of zinc chloride under conditions effective to produce a more efficient Lucas reagent than a Lucas reagent made by mixing solid, anhydrous zinc chloride with 38% hydrochloric acid. For example, the reaction rate of such Lucas reagent with levo-menthol is much faster and requires a much shorter reaction period than Lucas reagent formed in the conventional manner from anhydrous, solid zinc chloride and concentrated (38%) hydrochloric acid. Also, the conversion to levo-menthyl chloride was higher when using Lucas reagent formed using gaseous anhydrous hydrogen chloride and aqueous zinc chloride solution. Also, Lucas reagent made in this manner is highly amenable to recycling, and requires only addition thereto of hydrogen chloride to replenish the catalyst for an ensuing run.

REFERENCES:
patent: 4073816 (1978-02-01), Herrmann
patent: 4238365 (1980-12-01), Antos
patent: 4430198 (1984-02-01), Heck et al.
patent: 5132476 (1992-07-01), Osterburg et al.
Chemistry of Organic Compounds, Carl R. Noller, 1965, chapter 8, p. 148. No month available.
Roberts and Caserio, Basic Principles of Organic Chemistry, W. A. Benjamin, Inc., 1965, p. 392. No month available.
Chaudhary, Abdul J., et al., "Heavy Metals in the Environment. Part IV: An Investigation into the Solubility of Metal Chlorides in HCl-Saturated Solutions and The Recycling of High-Aluminum Zinc Residues in the Zinc Chloride Process", J. of Chem. Tech. and Biotechnology, vol. 61(4), 1994, pp. 287-292.
Abstract of Russian literature reference: Lovtsova, et al., "Reaction of Cyclohexanol-1-13C With Hydrochloric Acid and Lucas Reagent", Izv. Akad. Nauk SSSR, Ser. Khim., 1972, vol. 3, pp. 618-619. No month available.

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