The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2014
Filed:
Jul. 01, 2011
George J. Merz, Iii, Mobile, AL (US);
Michelle F. Walasavage, Orwigsburg, PA (US);
Berth Jan Deelman, DW Kapelle, NL;
Maarten D. K. Boele, GP Goes, NL;
Andrew R. Goddard, Malvern, PA (US);
William D. Honnick, Exton, PA (US);
George J. Merz, III, Mobile, AL (US);
Michelle F. Walasavage, Orwigsburg, PA (US);
Berth Jan Deelman, DW Kapelle, NL;
Maarten D. K. Boele, GP Goes, NL;
Andrew R. Goddard, Malvern, PA (US);
William D. Honnick, Exton, PA (US);
PMC Organometallix, Inc., Mt. Laurel, NJ (US);
Abstract
The invention provides a process for producing monoalkyltin trihalide or a mixture of monoalkyltin trihalide and dialkyltin dihalide by: (a) contacting dialkyltin dihalide with an alkylation agent and, optionally, tin tetrahalide, to form a tetraalkyltin mixture comprising tetraalkyltin, trialkyltin halide, and dialkyltin dihalide; (b) reacting the tetraalkyltin mixture with tin tetrahalide to form a monoalkyltin trihalide mixture comprising monoalkyltin trihalide, dialkyltin dihalide and optionally triaklyltin halide; (c) processing the monoalkyltin trihalide mixture to separately recover the monoalkyltin trihalide and a dialkyltin dihalide stream optionally containing trialkyltin halide; and (d) recycling at least a portion of the dialkyltin dihalide stream recovered in step (c) to the contacting step (a).