US 7,396,970 B1 · Monitoring and control of processes for making 1-hexene

Abstract

Processes, methods and apparatus relating to olefin oligomerization include the use of Raman spectrometry to monitor the concentration of reactants, products or other chemical components. One or more oligomerization conditions are adjusted in response to those monitored concentrations. The present processes, methods and apparatus are capable of monitoring olefin oligomerization with the use of low resolution Raman spectrometry equipment, even where there is some degree of overlap between Raman spectral peaks. Apparatus for olefin oligomerization reactions have at least one Raman probe located in the oligomerization equipment, the Raman probe providing an output signal, and Raman spectrometry equipment located outside the oligomerization equipment and operatively connected to at least one Raman probe.

Claims23

Dependent claims

A process for olefin oligomerization in a reactor, the process comprising:

providing a reaction mixture in the reactor, the reaction mixture comprising:
at least one reactant comprising at least one olefin monomer and optionally hydrogen, wherein the olefin monomer comprises ethylene;
and
a catalyst system suitable for the oligomerization of olefin monomers;
contacting the olefin monomer and the catalyst system in a reaction zone;
monitoring an olefin oligomerization reaction by using low-resolution Raman spectrometry equipment to provide an output signal representative of ethylene or 1-hexene, or a combination thereof, wherein the oligomerization reaction comprises a trimerization reaction;
recovering an oligomer, wherein the oligomer comprises 1-hexene;
and
adjusting the olefin oligomerization reaction in response to the output signal provided by the Raman spectrometry equipment.

6 more elements

Dependencies are inferred from the claim text.

Monitoring and control of processes for making 1-hexene

Life of this patent

Monitoring and control of processes for making 1-hexene

Life of this patent

Abstract

Claims23