Process for improved yields of high molecular weight olefins form lower molecular weight olefines

Abstract

A process for improved yields of heavier olefins from a substantially narrow range of lighter hydrocarbon feed stock containing olefins in a reaction distillation column comprising feeding a narrow range of hydrocarbon feed stock containing olefin into a reaction distillation column at a point between its bottom and top, contacting the olefins at the point of feed with a disproportionation catalyst in alternating arrangement with an isomerization catalyst or a mixture thereof and keeping the reaction mixture in a state of vapor-liquid equilibrium for concentrating the lighter reaction products in the vapor phase and the heavier reaction products in the liquid phase by maintaining a controlled pressure and temperature profile in the reactive distillation column and for reactively creating the desired heavier molecular weight olefins over the catalysts and collecting it as bottoms product and removing the lighter molecular weight olefins overhead from the top of the reactive distillation column.

Description

technical field [0001] This application is a continuation-in-part of Application Serial No. 09 / 828,771, filed April 9,2001. [0002] The present invention relates to a controlled method of increasing the production of heavier olefins by using a hydrocarbon feedstock containing a substantially narrow range of lighter olefins, which feedstock is introduced into a reactive distillation column at predetermined points relative to those containing the narrow range The feed point of the hydrocarbon feedstock of lighter olefins is predetermined, and the isomerization and disproportionation catalysts are placed in different forms. The control method maintains the reaction mixture in a state of vapor / liquid equilibrium in order to separate the lighter products at the top from the heavier reaction products collected at the bottom by maintaining a controlled pressure and temperature profile. The pressure and temperature profiles are related to the hydrocarbon feedstock used containing a ...

AI Technical Summary

Problems solved by technology

[0010] In addition, the existing technology only uses the disproportionation and heterogeneous metal catalysts alone or in combination. As for the position of the catalyst relative to the input point of the raw material, or which catalyst reacts with the raw material first, there is no difference in the prior art

Images