Provided herein in is a method of removing phosphorus from a liquid hydrocarbon that includes the steps of (a) contacting the liquid hydrocarbon with an aqueous solution that comprises an oxidizing agent to form a reaction mixture that comprises an aqueous component and a hydrocarbon component, wherein the liquid hydrocarbon comprises at least an alkene.sub.(C4-30), and a phosphine.sub.(C?30); (b) reacting the oxidizing agent with the phosphine.sub.(C?30) to form the corresponding phosphine oxide.sub.(C?30); and (c) separating the aqueous component from the hydrocarbon component, thereby removing the phosphine oxide.sub.(C?30) from the liquid hydrocarbon.

A catalytic conversion process for producing propylene includes the steps of: 1) providing a starting material comprising olefin(s) having 4 or more carbon atoms; 2) pretreating the starting material to obtain a propylene precursor comprising olefin(s) having 32.sup.n carbon atoms, wherein n is an integer greater than or equal to 1; and 3) subjecting the propylene precursor to a catalytic cracking reaction to obtain a reaction product comprising propylene.

A catalytic conversion process for producing propylene includes the steps of: 1) providing a starting material comprising olefin(s) having 4 or more carbon atoms; 2) pretreating the starting material to obtain a propylene precursor comprising olefin(s) having 32.sup.n carbon atoms, wherein n is an integer greater than or equal to 1; and 3) subjecting the propylene precursor to a catalytic cracking reaction to obtain a reaction product comprising propylene.

A resist composition comprising a base polymer and a 2,5,8,9-tetraaza-1-phosphabicyclo[3.3.3]undecane salt compound offers a high dissolution contrast, minimal LWR, and dimensional stability on PPD.

A process provides oligomerization feed stream comprising C.sub.5 hydrocarbons and olefins along with C.sub.4 olefins to an oligomerization zone. The oligomerization feed stream may be obtained from cracked FCC products. Unreacted C.sub.5 hydrocarbons can be recycled to the oligomerization zone to maintain the liquid phase therein.

A process provides oligomerization feed stream comprising C.sub.5 hydrocarbons and olefins along with C.sub.4 olefins to an oligomerization zone. The oligomerization feed stream may be obtained from cracked FCC products. Unreacted C.sub.5 hydrocarbons can be recycled to the oligomerization zone to maintain the liquid phase therein.

A process provides oligomerization feed stream comprising C.sub.5 hydrocarbons and olefins along with C.sub.4 olefins to an oligomerization zone. The oligomerization feed stream may be obtained from cracked FCC products. Unreacted C.sub.5 hydrocarbons can be recycled to the oligomerization zone to maintain the liquid phase therein.

The present invention provides an olefin oligomerization process comprising the steps of: i) reducing the level of acetonitrile in an olefin feed by contacting the feed with a non-zeolitic metal oxide; and ii) contacting the olefin feed with reduced level of acetonitrile with an olefin oligomerization catalyst under conditions suitable to oligomerize the olefin.

The present invention provides an olefin oligomerization process comprising the steps of: i) reducing the level of acetonitrile in an olefin feed by contacting the feed with a non-zeolitic metal oxide; and ii) contacting the olefin feed with reduced level of acetonitrile with an olefin oligomerization catalyst under conditions suitable to oligomerize the olefin.