Process for preparing monoalkyltin halides and dialkyltin...

Details Process for preparing monoalkyltin halides and dialkyltin... Process for preparing monoalkyltin halides and dialkyltin...

2005-01-25

2005-01-25

Nazario-Gonzalez, Porfirio (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C556S095000, C556S102000

Reexamination Certificate

active

06846944

ABSTRACT:
The invention relates to a process for the direct preparation of mixtures of monoalkyltin trichlorides RSnCl3and dialkyltin dichlorides R2SnCl2in one reaction step by partial alkylation of tin tetrachloride using alkylaluminum compounds in the form of their ether donor complexes, wherein an amount of ether greater than that required for stoichiometric formation of the donor complex is used in the reaction.

REFERENCES:
patent: 3248411 (1966-04-01), Neumann et al.
patent: 3894066 (1975-07-01), Buschhoff et al.
patent: 1161893 (1964-01-01), None
patent: 2304617 (1974-08-01), None
patent: 2444786 (1976-04-01), None
patent: 1 389 620 (2004-02-01), None
patent: 1501673 (1978-02-01), None
patent: 2055576 (1981-03-01), None

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