Catalytic steam dealkylation of alkyl phenols
AssigneeHydrocarbon Research, Inc.
InventorFrancis P. Daly
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Abstract
This invention provides a method for the selective dealkylation of alkylated phenols, which method comprises reacting a feed solution comprising a mixture of alkylated phenols with steam in the presence of a catalyst comprising a hydrous carrier, at least one catalyst deactivation suppressor, and at least one promoter. A salt of an alkali metal may be added to the feed to enhance the selectivity of phenol in the product.
Claims11
A process of dealkylating alkyl phenol to form a phenol product comprising reacting a feed solution comprising a mixture of alkyl phenols with steam in the presence of a catalyst, the catalyst comprising a hydrous carrier, from about 0.1 to about 10% by weight of at least one catalyst deactivation suppressor selected from the group consisting of Group I-A and Group II-A metals, and from about 0.1 to about 20% by weight of at least one promoter selected from the group consisting of Group VIII metals and Group VI-B metal oxides, the mole ratio of steam to alkyl phenols being from about 1:1 to about 15:1, the reaction being carried out at a temperature of from about 250.degree. to about 700.degree. C. and at a pressure of from about 1 to about 50 atmospheres, the weight hourly space velocity of the alkyl phenols is from about 0.1 to about 5.0 gm phenol/hr/gram catalyst.
A process of dealkylating alkyl phenol to form a phenol product comprising reacting a feed solution comprising from about 0.1 to about 18% by weight of an alkali metal salt and a mixture of alkyl phenols with steam in the presence of a catalyst, the catalyst comprising a hydrous carrier, from about 0.1 to about 10% by weight of at least one catalyst deactivation suppressor selected from the group consisting of Group I-A and Group II-A metals, and from about 0.1 to about 20% by weight of at least one promoter selected from the group consisting of Group VIII metals and Group VI-B metal oxides, the mole ratio of steam to alkyl phenols being from about 1:1 to about 15:1, the reaction being carried out at a temperature of from about 250.degree. to about 700.degree. C. and at a pressure of from about 1 to about 50 atmospheres, the weight hourly space velocity being from about 0.1 to about 5.0 gm phenol/hr/gram catalyst.
Dependencies are inferred from the claim text.