A method for converting olefins with four to six carbon atoms to produce propylene

Abstract

The invention relates to a method for transforming and producing propylene by employing olefin with 4-6 carbon atoms, and provides a technique for transforming and producing propylene by employing C4 to C6 olefin components contained in liquefied gas and light petrol. According to the method, the olefin oligomerization cracking reaction process is changed by transforming the olefin into corresponding alcohol or ether; generation of low-valent by-products such as dry gas and coke in the reaction process is inhibited; the target product selectivity is improved; the material circulation in the process is reduced; and the energy consumption in the process is reduced.

Description

technical field

[0001] The present invention relates to a process for the conversion of olefins having four to six carbon atoms to produce propylene, in particular a process for the at least partial conversion of a hydrocarbon feed comprising olefins having a carbon number between 4 and 6 to propylene , the fraction that will be referred to as the C4 / C6 fraction in the rest of the text most often comes from an FCC (Fluid Catalytic Cracking) unit or a steam cracking unit. Background technique

[0002] Propylene is an important petrochemical raw material. With the continuous development of new varieties of downstream derivatives of propylene, the demand for propylene has been strong in recent years. At present, 54% of propylene in my country comes from steam cracking of naphtha, and 42% of propylene is a by-product of catalytic cracking unit. It is of great practical significance to develop new propylene production technology and further expand the source of propylene. [00...

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