Preparing aqueous alkaline slurry of thallic oxide

Details Preparing aqueous alkaline slurry of thallic oxide Preparing aqueous alkaline slurry of thallic oxide

1976-08-24

1977-06-21

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

26034856, 260593R, C01G 1500

Patent

active

040311961

ABSTRACT:
In an aqueous alkaline solution having a pH greater than 11.9, thallous isobutyrate is oxidized by air in a temperature within a range from about 90.degree. C to about 250.degree. C to prepare a slurry of thallic oxide from which thallic oxide can be recovered. The alkaline isobutyrate solution can be treated with carbon dioxide under pressure to form a carbonate salt and isobutyric acid, which can be solvent extracted from the aqueous system. Such isobutyric acid can be employed in a 30 percent aqueous solution at 90.degree.-150.degree. C to dissolve thallic oxide and to prepare thallic triisobutyrate. This aqueous solution of thallic triisobutyrate can be employed for the oxidation of an organic compound susceptible to oxidation to desirable partially oxidized organic compounds, such as the oxidation of propylene to propylene oxide. The carbonate salt can be thermally decomposed to regenerate an alkaline metal hydroxide and carbon dioxide. The availability of this novel preparation of thallic oxide makes feasible the recycling of most components, so that the thallium ion is an intermediate useful for the oxidation of an organic compound indirectly using the oxygen of air through such cyclic processing of the thallium ion.

REFERENCES:
patent: 3048636 (1962-08-01), Grinstead
Berry, "Journal of the Chemical Soc.", vol. 123, 1923, pp. 1109-1114.
Mellor, "Comprehensive Treatise on Inorganic & Theoretical Chemistry", vol. 5, 1946, pp. 430-436.
Obara et al., "Chemical Absts.", vol. 83, 1975, abstract 34761c.

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