| 摘要 |
A process for the conversion of an alcohol mixture to make propylene may include introducing into a reactor a stream that includes the alcohol mixture. The alcohol mixture may include 20 to 100 weight percent isobutanol. The process may include contacting the stream with a single catalyst at a temperature above 450° C. in the reactor at conditions effective to dehydrate the isobutanol, forming C4+ olefins, and to catalytically crack the C4+ olefins. The single catalyst may be an acid catalyst adapted to cause both the dehydration and the catalytic cracking. The process may include recovering from the reactor an effluent that includes ethylene, propylene, water, and various hydrocarbons. The process may include fractionating the effluent to produce an ethylene stream, a propylene stream, a fraction of hydrocarbons having 4 carbon atoms or more, and water. |
| 主权项 |
1. A process for the conversion of an alcohol mixture comprising about 20 to 100 weight percent isobutanol to make essentially propylene, comprising:
a) introducing in a reactor a stream comprising the alcohol mixture, optionally water, optionally an inert component, b) contacting said stream with a single catalyst at a temperature above 450° C. in said reactor at conditions effective to dehydrate at least a part of the isobutanol and other alcohols, if any, forming C4+ olefins, and to catalytically crack the C4+ olefins, wherein the single catalyst is an acid catalyst adapted to cause both the dehydration and the catalytic cracking, wherein the single catalyst is a porous crystalline aluminophosphate containing at least one 10 and/or 12 member ring in the structure thereof, c) recovering from said reactor an effluent comprising: ethylene, propylene, water, optionally unconverted alcohols of the alcohol mixture, various hydrocarbons, and the optional inert component of step a), d) fractionating said effluent of step c) to produce at least an ethylene stream, a propylene stream, a fraction consisting essentially of hydrocarbons having 4 carbon atoms or more, water and the optional inert component of step a), optionally recycling ethylene in whole or in part at an inlet of the reactor, optionally recycling the fraction consisting essentially of hydrocarbons having 4 carbon atoms or more at the inlet of the reactor. |
