Stabilization of phenols
Abstract
Abstract 1,163,540. Stabilizing phenols. HOOKER CHEMICAL CORP. 29 Nov., 1966 [30 Nov., 1965], No. 14551/69. Divided out of 1,163,539. Heading C2C. Phenols are stabilized against oxidation by incorporating a small proportion of at least one trivalent arsenic compound, e.g. arsenic trioxide or sodium arsenite. The arsenic compound may be used alone or in association with (a) an aromatic o-hydroxycarboxylic acid of the formula in which X denotes a hydrogen atom, an alkyl group of 1-5 carbon atoms or a carboxyl group, and (or) (b) a saturated aliphatic polycarboxylic acid. Specified acids of these types include salicylic, hydroxyisophthalic, oxalic and citric acids. The composition may also include a chelating agent, e.g. 1,2-diaminocyclohexane- N,N,N<SP>1</SP>,N<SP>1</SP>-tetraacetic acid. Specified phenols which may be stabilized include phenol, chloro- and bromo-phenols, alkylphenols, naphthols, dihydroxydiphenylmethanes, resorcinol and pyrogallol. Comparative examples are given.
Inventors
- 👤 Hans L Schlichting
- 👤 Ellis I Lichtblau
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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