Patent ID: 9334202
Filing Date: 2016-05-10
CPC Classification: B01J,C07C,C10G,C12P,Y02E,Y02P

Claim Text:
1. A process comprising: a) introducing in a reactor (A) a stream comprising about 20 weight percent to 100 weight percent isobutanol, optionally water, optionally an inert component; b) contacting said stream with a catalyst (A1) in said reactor (A) at conditions effective to dehydrate the isobutanol to butenes; c) recovering from said reactor (A) an effluent comprising substantially butenes, optionally olefins other than butene, water, optionally unconverted alcohols, and optionally the inert component of step a); d) fractionating said effluent of step c) to remove a portion or all the water, optionally unconverted alcohols, optionally the inert component to get a stream (D) comprising butenes and optionally the inert component; e) introducing a feedstock comprising at least a part of said stream (D) in an OCP reactor; f) contacting said feedstock comprising said stream (D), optionally in combination with a stream (D1) comprising olefins having 4 carbon atoms or more, in said OCP reactor with a P-modified zeolite catalyst which is selective towards light olefins in the effluent, to produce an effluent with an olefin content of lower molecular weight than that of the feedstock; g) fractionating said effluent of step f) to produce at least an ethylene stream, a propylene stream and a fraction consisting essentially of hydrocarbons having 4 carbon atoms or more, optionally recycling the ethylene in whole or in part at an inlet of the OCP reactor of step f), or at an inlet of the reactor (A) or at the inlet of both the OCP reactor of step f) and the reactor (A), optionally recycling the fraction consisting essentially of hydrocarbons having 4 carbon atoms or more at the inlet of the OCP reactor; wherein a process for preparing the P-modified zeolite comprises the following sequential steps: