Methods for preparing detergent-type alkylaryl sulfonates include the steps of dehydrogenating normal paraffins to form mono-olefins, reacting the mono-olefins with a monocyclic aryl compound such as benzene, and sulfonating the resulting alkylaryl hydrocarbon. Dehydrogenation catalysts comprising one or...
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One of the molds has no perforations for the passage of vapor and the other of the molds has: (1) perforations for the passage of a vapor; and (ii) at least two chambers which divide the perforations for the passage of vapor into perforations which permit the entrance of steam into the...
One of the molds has no perforations for the passage of vapor and the other of the molds has: (1) perforations for the passage of a vapor; and (ii) at least two chambers which divide the perforations for the passage of vapor into perforations which permit the entrance of steam into the...