초록 ▼

Extremely effective adsorbants are provided for removing color precursors from detergent range alkyl benzenes prior to sulfonation. The adsorbers provided are specific crystalline zeolites in a silica alumina matrix and bauxite clay having at least one material selected from the group consisting of

Extremely effective adsorbants are provided for removing color precursors from detergent range alkyl benzenes prior to sulfonation. The adsorbers provided are specific crystalline zeolites in a silica alumina matrix and bauxite clay having at least one material selected from the group consisting of ferric oxide, titanium dioxide and zirconium oxide which is activated by sulfuric acid then calcined to provide the effective adsorbant.

대표청구항 ▼

A method for removing precursors causing color in sulfonated alkyl benzene from said alkyl benzene prior to sulfonation comprising contacting non-sulfonated alkyl benzenes with a solid adsorbent to remove said precursors, where said adsorbent is at least one material selected from the group consisti

A method for removing precursors causing color in sulfonated alkyl benzene from said alkyl benzene prior to sulfonation comprising contacting non-sulfonated alkyl benzenes with a solid adsorbent to remove said precursors, where said adsorbent is at least one material selected from the group consisting of (1) bauxite clays containing from about 0.1 to about 20% by weight of at least one material selected from the group consisting of ferric oxide, titanium dioxide, and zirconium oxide, said clay contacted with from about 0.1 to about 20% by weight of sulfuric acid, then activated for removal of color precursors by calcining the mixture at a temperature and time sufficient to activate the adsorbent prior to use, and (2) crystalline zeolites suspended in a silica alumina matrix, wherein said adsorbent contains from about 5% to about 20% by weight of zeolite, based on the total weight of the adsorbent, and then activated for removal of color precursors by calcining the mixture at a temperature and time sufficient to activate the adsorbent prior to use.