Hydrodealkylation process with catalyst of group vib metals promoted by tin oxide or lead oxide

Abstract

Abstract A process for the hydrodealkylation of alkyl-substituted aromatic hydrocarbons, including contacting the alkyl-substituted aromatic hydrocarbons with a catalyst comprising a metal of Group VIB of the Periodic System, such as chromium, molybdenum and tungsten, in an amount from about 5 to 15 percent by weight based on the finished catalyst and a promoter comprising a metal of Group IVA of the Periodic System, such as tin and lead, in an amount between about 1 to 15 percent by weight of the final catalyst, both deposited on an inert oxide support, such as gamma aluminas, silica-alumina, magnesia-alumina, etc., at a temperature of about 1,050* to 1,200* F, a pressure of about 100 to 1,000 psig., a liquid hourly space velocity of about 0.1 to 5 and a hydrogen-to-hydrocarbon mole ratio between about 3 and 15 to 1. A second promoting agent selected from the Group consisting of alkali metals, alkaline earth metals, and rare earth metals, such as potassium, rubidium, cesium, calcium, strontium, barium, cerium, thorium, etc., may also be deposited on the carrier.

Inventors

• 👤 Ronald A Kmecak
• 👤 Stephen M Kovach
• 👤 Ralph E Patrick

Bibliographic Details