Abstract:
A safety apparatus has been found for recovering an airborne hydrogen fluoride release in a hydrocarbon alkylation process. The safety apparatus comprising containment baffles and hydrogen fluoride detectors. Hydrogen fluoride detectors activate water flood means which discharge into the containment baffles. The water flood containing essentially all of the hydrogen fluoride release is recovered for disposal. Recoveries of 90 wt % have been demonstrated.
Abstract:
A hydrocracking process wherein heavy hydrocarbon oils having from about 10 to 50 percent boiling above 1,000*F. and containing appreciable amounts of sulfur, nitrogen, and metal-containing compounds as well as asphaltenes are converted into a minor fraction of low sulfur residual fuel oil and a major fraction of low sulfur gasoline. The process comprises hydrocracking the heavy oil with molecular hydrogen, at a temperature of about 700*-850*F. in the presence of a sulfur and nitrogen resistant hydrocracking catalyst comprising a hydrogenating component supported upon an amorphous inorganic oxide cracking base to convert the heavy hydrocarbon oil into a gas-oil fraction and a low sulfur residual fraction; separating the gas-oil fraction from the residual fraction; hydrocracking the gas-oil fraction with molecular hydrogen, at a temperature of 700*-780*F., in the presence of a sulfur and nitrogen resistant hydrocracking catalyst comprising a hydrogenation component supported upon a cation exchanged crystalline silica-alumina zeolitic molecular sieve cracking base to yield low sulfur, low nitrogen gasoline.