Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1995-12-22
1997-12-30
Nazario-Gonzalez, Porfirio
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
556 87, 556105, C07F 730
Patent
active
057032599
ABSTRACT:
A synthetic method for generating pure carboxyethyl germanium sesquioxide in the absence of toxic impurities. In the method germanium dioxide and metallic germanium are not used as starting materials. The method involves steps which ensure (a) absence of any residual germanium tetrachloride to ensure none is available to form germanium dioxide, (b) removal of any germanium dioxide, (c) removal of any germanium tetrachloride later produced from any germanium dioxide and (d) final removal of any germanium dioxide. In an alternative method, intermediate TPA is prepared by direct precipitation from a concentrated solution with a halogenated solvent preferably dichloromethane when poured into a non-polar alkyl solvent preferably hexane at ambient temperature and then converted to carboxyethyl germanium sesquioxide.
REFERENCES:
patent: 3793455 (1974-02-01), Asai et al.
patent: 4066678 (1978-01-01), Sato et al.
patent: 4473581 (1984-09-01), Ishida et al.
patent: 4898882 (1990-02-01), Nagahama et al.
patent: 4956272 (1990-09-01), Kakimoto et al.
patent: 4973553 (1990-11-01), Miyao et al.
patent: 5386046 (1995-01-01), Arnold
patent: 5550266 (1996-08-01), Arnold
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