Abstract: A hydrocarbon feed stream may be processed by a method that may include catalytically cracking a hydrocarbon feed stream in a counter-current reactor to produce a first effluent stream, and processing a portion or all of the first effluent stream by at least one or more separations. The at least one or more separations may form at least a second effluent stream including at least 95 wt. % C4-C6 hydrocarbons, and a third effluent stream including at least 95 wt. % of ethane, propane, or a combination thereof. In some embodiments, the method may further include catalytically cracking a portion or all of the second effluent stream in a second reactor to form a second reactor effluent stream, combining a portion of all of the second reactor effluent stream with the first effluent stream, steam cracking a portion or all of the third effluent stream to form a steam cracked effluent stream, and combining a portion or all of the steam cracked effluent stream with the first effluent.

Abstract: An exercise assembly for practicing in-line skating includes a base that has an upper surface with a smooth texture to provide minimal friction to sliding. Each of a pair of front tubes and each of a pair of rear tubes extends perpendicularly from a respective opposing side of the base. A crossbar extends between the pair of front tubes distal from the base. Each front tube comprises a plurality of nested sections. Each rear tube comprises a plurality of nested segments. The front tubes and the rear tubes are selectively extensible from the base. Each of a pair of side bars extends between a respective front tube and an associated rear tube. The side bars and the crossbar are selectively positionable relative to the base and are configured to be grasped in hands of a user to support the user exercising on the base.

Abstract: An exercise assembly for practicing in-line skating includes a base that has an upper surface with a smooth texture to provide minimal friction to sliding. Each of a pair of front tubes and each of a pair of rear tubes extends perpendicularly from a respective opposing side of the base. A crossbar extends between the pair of front tubes distal from the base. Each front tube comprises a plurality of nested sections. Each rear tube comprises a plurality of nested segments. The front tubes and the rear tubes are selectively extensible from the base. Each of a pair of side bars extends between a respective front tube and an associated rear tube. The side bar and the crossbar are selectively positionable relative to the base and are configured to be grasped in hands of a user to support the user exercising on the base.