Process for separating iodine and its compounds from the carbony

Details Process for separating iodine and its compounds from the carbony Process for separating iodine and its compounds from the carbony

1984-08-06

1987-05-12

Bascomb, Wilbur

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 38, 260546, 260549, 560232, 560248, 562608, C07C 5144, C07C 51573, C07C 6754

Patent

active

046647538

ABSTRACT:
The disclosure relates to a process for separating iodine and its compounds from the carbonlyation products acetic acid, acetic anhydride or ethylidene diacetate obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction. For reducing the quantity of total iodine contaminating the carbonlyation products to less than 20 ppb iodine, the disclosure provides for the carbonylation products to be treated at temperatures of 20.degree. to 250.degree. C. with an alkyl or aryl phosphine or a heterocyclic aromatic nitrogen compound and at least one of the metals copper, silver, zinc or cadmium or their compounds and to be distillatively separated from the iodine thereby fixed in non-volatile form.

REFERENCES:
patent: 3084109 (1963-04-01), Ure et al.
patent: 3709795 (1973-01-01), Singleton
patent: 3772156 (1973-11-01), Johnson et al.
patent: 3884965 (1975-05-01), Kollar
patent: 4115444 (1978-09-01), Rizkalla
patent: 4246195 (1981-01-01), Szecsi
patent: 4333884 (1982-06-01), Kubbeler et al.
patent: 4430273 (1984-02-01), Erpenbach et al.
patent: 4497747 (1985-02-01), Vogt et al.

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