Purification of tertiary hydroperoxides containing primary and secondary hydroperoxide contaminants
First Claim
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1. A process for purifying a tertiary hydroperoxide composition comprised of a tertiary hydroperoxide and an undesired primary or secondary hydroperoxide contaminant which comprises the steps of:
- (A) contacting the tertiary hydroperoxide composition with(a) a basic compound selected from the group consisting of alkali metal oxides, alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates, alkaline earth oxides, alkaline earth hydroxides, alkaline earth carbonates, alkaline earth bicarbonates, and amines, and(b) a carboxylic acid derivative selected from the group consisting of anhydrides, esters, acid halides, and amides at a temperature of between about 20°
C. and 175°
C. and for a period of from about 30 seconds to 1 hour to decompose said primary or secondary hydroperoxide contaminant, and(B) separating a purified tertiary hydroperoxide composition from said basic compound, said carboxylic acid derivative, and said primary or secondary hydroperoxide decomposition product.
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Abstract
Primary and secondary hydroperoxide contaminants in a tertiary hydroperoxide composition obtained by oxidation of a branched hydrocarbon are removed by contacting the tertiary hydroperoxide with a carboxylic acid derivative such as an anhydride and a basic compound such as sodium hydroxide. A tertiary hydroperoxide such as tertiary butyl hydroperoxide is purified with minimal loss of the desired tertiary hydroperoxide.
11 Citations
19 Claims
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1. A process for purifying a tertiary hydroperoxide composition comprised of a tertiary hydroperoxide and an undesired primary or secondary hydroperoxide contaminant which comprises the steps of:
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(A) contacting the tertiary hydroperoxide composition with (a) a basic compound selected from the group consisting of alkali metal oxides, alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates, alkaline earth oxides, alkaline earth hydroxides, alkaline earth carbonates, alkaline earth bicarbonates, and amines, and (b) a carboxylic acid derivative selected from the group consisting of anhydrides, esters, acid halides, and amides at a temperature of between about 20°
C. and 175°
C. and for a period of from about 30 seconds to 1 hour to decompose said primary or secondary hydroperoxide contaminant, and(B) separating a purified tertiary hydroperoxide composition from said basic compound, said carboxylic acid derivative, and said primary or secondary hydroperoxide decomposition product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for purifying a tertiary butyl hydroperoxide composition comprising tertiary butyl hydroperoxide and an undesired primary or secondary hydroperoxide contaminant which comprises the steps of:
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(A) contacting the tertiary butyl hydroperoxide composition with (a) from about 0.3 to 5.0 milliequivalents of a carboxylic acid anhydride per gram of total hydroperoxide present and (b) from about 1.5 to 3.5 milliequivalents of an alkali metal hydroxide per milliequivalent of said carboxylic acid anhydride at a temperature of between about 20°
C. and 175°
C. for a period of from about 30 seconds to 1 hour to decompose said primary or secondary hydroperoxide contaminant; and(B) separating a purified tertiary butyl hydroperoxide composition from said carboxylic acid anhydride, said alkali metal hydroxide, and primary or secondary hydroperoxide decomposition product. - View Dependent Claims (13, 14, 15, 16)
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17. A process for purifying a tertiary butyl hydroperoxide composition comprising tertiary butyl hydroperoxide and an undesired primary or secondary hydroperoxide contaminant which comprises the steps of:
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(A) contacting the tertiary butyl hydroperoxide composition with (a) from about 0.3 to 5.0 milliequivalents of maleic anhydride per gram of total hydroperoxide present and (b) from about 1.5 to 3.5 milliequivalents of sodium hydroxide per milliequivalent of maleic anhydride at a temperature of between about 30°
C. to 80°
C. for a period of from about 1 to 30 minutes to decompose said primary or secondary hydroperoxide contaminant; and(B) separating a purified tertiary butyl hydroperoxide composition from said maleic anhydride, said sodium hydroxide, and said primary or secondary hydroperoxide decomposition product. - View Dependent Claims (18, 19)
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Specification