Process and apparatus for contacting reactants with an intermittently moving catalyst bed while controlling reaction temperatures

摘要

Process and apparatus for contacting reactants with a particulate catalyst while indirectly contacting the reactants and the particulate catalyst with a heat exchange medium and while intermittently withdrawing and replacing particulate catalyst by an operation that sequentially restricts reactant flow while moving catalyst through reaction stacks in which the reactant flow has been restricted. The invention permits a change out of catalyst in a channel type reactor arrangement that would normally restrict catalyst flow during operation and allows the movement of catalyst through a heat exchange type reactor having reactant and heat exchange channels, thereby enabling control of catalyst activity as well as reaction temperatures.