In a process for producing an olefin polymer, at least one olefin monomer is polymerized in a polymerization reactor to produce a particulate polymer product containing hydrocarbon impurities including unreacted monomer and other C.sub.1 to C.sub.8 hydrocarbons. The polymer product is contacted with a gas-containing stream in a stripping vessel under conditions effective to strip hydrocarbon impurities from the polymer product and produce a stripped particulate polymer product and a gaseous first effluent stream containing inert gas and hydrocarbon impurities. The stripped particulate polymer product is recovered and the atmosphere adjacent the stripped particulate polymer product is sensed with a photoionization detector configured to ionize C.sub.4 to C.sub.8 hydrocarbons. The amount of the gas-containing stream supplied to the stripping vessel is then adjusted based upon such sensing.

In a process for producing an olefin polymer, at least one olefin monomer is polymerized in a polymerization reactor to produce a particulate polymer product containing hydrocarbon impurities including unreacted monomer and other C.sub.1 to C.sub.8 hydrocarbons. The polymer product is contacted with a gas-containing stream in a stripping vessel under conditions effective to strip hydrocarbon impurities from the polymer product and produce a stripped particulate polymer product and a gaseous first effluent stream containing inert gas and hydrocarbon impurities. The stripped particulate polymer product is recovered and the atmosphere adjacent the stripped particulate polymer product is sensed with a photoionization detector configured to ionize C.sub.4 to C.sub.8 hydrocarbons. The amount of the gas-containing stream supplied to the stripping vessel is then adjusted based upon such sensing.

In a process for producing an olefin polymer, at least one olefin monomer is polymerized in a polymerization reactor to produce a particulate polymer product containing hydrocarbon impurities including unreacted monomer and other C.sub.1 to C.sub.8 hydrocarbons. The polymer product is contacted with a gas-containing stream in a stripping vessel under conditions effective to strip hydrocarbon impurities from the polymer product and produce a stripped particulate polymer product and a gaseous first effluent stream containing inert gas and hydrocarbon impurities. The stripped particulate polymer product is recovered and the atmosphere adjacent the stripped particulate polymer product is sensed with a photoionization detector configured to ionize C.sub.4 to C.sub.8 hydrocarbons. The amount of the gas-containing stream supplied to the stripping vessel is then adjusted based upon such sensing.

Disclosed herein are polymerization processes where recycled polymeric material is fed to polymerization process to produce a blend of virgin polymer with recycled polymeric content.

Disclosed herein are polymerization processes where recycled polymeric material is fed to polymerization process to produce a blend of virgin polymer with recycled polymeric content.

The present invention relates to a process for reducing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process by means of a gas stream, which is heated and/or free of wax, introduced into the one or more recycle coolers and the use of a heated gas stream for removing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process.

The present invention relates to a process for reducing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process by means of a gas stream, which is heated and/or free of wax, introduced into the one or more recycle coolers and the use of a heated gas stream for removing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process.

The present invention relates to a process for reducing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process by means of a gas stream, which is heated and/or free of wax, introduced into the one or more recycle coolers and the use of a heated gas stream for removing low molecular weight oligomers and wax build-up in one or more recycle coolers in a high pressure polymerization process.

Provided herein are methods and systems for at least partially deactivating at least one component of a reactor effluent from gas phase polyolefin polymerization processes utilizing at least one glycol.

Provided herein are methods and systems for at least partially deactivating at least one component of a reactor effluent from gas phase polyolefin polymerization processes utilizing at least one glycol.