US 12,030,849 B2
Liquid isomerization for methathesis process
Steven Evitt, Houston, TX (US); Cornelis F. Van Egmond, Houston, TX (US); Veronique Reich, Le Trait (FR); Yvon Simon, Le Trait (FR); and Bruno Destour, Le Trait (FR)
Assigned to TECHNIP PROCESS TECHNOLOGY, INC., Houston, TX (US)
Appl. No. 16/613,790
Filed by Technip Process Technology, Inc., Houston, TX (US)
PCT Filed Feb. 13, 2018, PCT No. PCT/US2018/017957
§ 371(c)(1), (2) Date Nov. 14, 2019,
PCT Pub. No. WO2018/212812, PCT Pub. Date Nov. 22, 2018.
Claims priority of provisional application 62/506,047, filed on May 15, 2017.
Prior Publication US 2020/0071245 A1, Mar. 5, 2020
Int. Cl. C07C 6/04 (2006.01); C07C 5/25 (2006.01); C07C 7/04 (2006.01); C07C 11/06 (2006.01); C07C 11/08 (2006.01)
CPC C07C 6/04 (2013.01) [C07C 7/04 (2013.01); C07C 5/25 (2013.01); C07C 11/06 (2013.01); C07C 11/08 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for the production of propylene from ethylene and butene comprising:
(i) isomerizing under liquid phase conditions a hydrocarbon stream in an isomerization reactor vessel, thereby producing an isomerized hydrocarbon stream;
(ii) providing a feedstock comprising the isomerized hydrocarbon stream to a metathesis reactor vessel without distilling the isomerized hydrocarbon stream before the metathesis reactor vessel; and
(iii) contacting the feedstock comprising the isomerized hydrocarbon stream with a metathesis catalyst in the metathesis reactor vessel to form a product stream,
wherein (1) the isomerization reactor vessel that converts a portion of 1-butene to 2-butene is located on a butene concentrated recycle stream for making the feedstock to the metathesis reactor vessel comprising a Raffinate mixture, ethylene and the isomerized hydrocarbon stream, the Raffinate mixture having 2-butene/1-butene mole ratio between 10 and 20, or (2) the isomerization reactor vessel that converts a portion of 1-butene to 2-butene is located on a fresh feed stream for making the feedstock to the metathesis reactor vessel comprising a Raffinate mixture, ethylene and the isomerized hydrocarbon stream, the Raffinate mixture having 2-butene/1-butene mole ratio less than 10,
wherein the hydrocarbon stream comprises n-butenes and paraffins in which butadiene is limited to a maximum of about 0.5 weight percent and isobutylene is limited to maximum of about 10 weight percent, and
wherein the isomerization reactor vessel is external and separate from the metathesis reactor vessel.