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Dimer selective metallocene catalyst, non-aromatic hydrocarbon soluble activator, and method for preparing poly alpha-olefin oligomer using same

A metallocene compound, dimer technology, applied in the direction of carbon compound catalysts, chemical instruments and methods, catalysts, etc., can solve problems such as operator and downtime cost and efficiency burden

Pending Publication Date: 2022-08-02
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the additional equipment, operators and downtime involved in the separation phase can be a cost and efficiency burden

Method used

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  • Dimer selective metallocene catalyst, non-aromatic hydrocarbon soluble activator, and method for preparing poly alpha-olefin oligomer using same
  • Dimer selective metallocene catalyst, non-aromatic hydrocarbon soluble activator, and method for preparing poly alpha-olefin oligomer using same
  • Dimer selective metallocene catalyst, non-aromatic hydrocarbon soluble activator, and method for preparing poly alpha-olefin oligomer using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[1254] Example - Metallocene Dimer Selective Process

[1255] All catalysts synthesized in N 2 Purge the oven using standard air-sensitive procedures. Celite (Sigma-Aldrich) and Molecular sieves (Sigma-Aldrich or Acros) were dried in a vacuum oven at 250°C for 3 days. with N 2 Purge solvent and dry and store in on molecular sieves. NMR solvents were dried and stored in on molecular sieves. MeMgI (in Et 2 3M in O, Sigma-Aldrich), CH 3 I (Sigma-Aldrich), isobutyl bromide (Sigma-Aldrich), n-hexyl bromide (Sigma-Aldrich), n-butyl bromide (Sigma-Aldrich), 1,2,3,5-tetrahydro-s-prime GLSyntech is used as received. Pentamethylcyclopentadienyl hafnium trichloride (Me 5 CpHfCl 3 ) was purchased from Strem Chemicals or synthesized in a manner analogous to that described in Journal of Organometallic Chemistry, (1988), v. 340, pp. 37-40.

[1256]

[1257]Activator A-1, N-di-octadecyl-N-methylanilinium tetrakis(perfluorophenyl)borate, obtained from Boulder Scientific Comp...

Embodiment 4

[1293] Oligomerization Example 4: Continuously stirred oligomerization using a 2 gallon pressurized Parr reactor. The reactor has inlet lines for various types of linear alpha-olefins and a drip tube for catalyst batch injection. The reactor was equipped with an external heater as well as an internal cooling loop to control the reaction temperature. 77 grams of Activator A-1 were received at 11 wt% concentration in methylcyclohexane. The methylcyclohexane was evaporated in the glove box and after 24 hours, 15 grams of solution remained (8.5 grams of activator A-1 and 6.5 grams of methylcyclohexane). 19 g of 1-decene was added to the solution to reduce the concentration of the activator from 57% to 25%. 1.25 gallons of 1-decene were dried using a commercial sorbent. Load the sorbent into two sorbent beds in series and connect its outlet to the glove box to ensure that the 1-decene does not absorb any polar contaminants, such as moisture or oxygen, from the open-vessel proces...

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Abstract

The present disclosure generally relates to a process for preparing a poly alpha-olefin (PAO) comprising: a) introducing a first alpha-olefin into a first catalyst system comprising a non-aromatic hydrocarbon soluble activator and a metallocene compound in a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions, wherein the first alpha-olefin is introduced into the reactor, preferably at a flow rate of about 100 g / hr or more, to form a first reactor effluent comprising PAO (e.g., at least 60% by weight of PAO dimer and 40% by weight or less of higher oligomers, where the higher oligomers are oligomers having a degree of polymerization of 3 or more), to form a second reactor effluent comprising PAO (e.g., at least 60% by weight of PAO dimer and 40% by weight or less of higher oligomers, where the higher oligomers are oligomers having a degree of polymerization of 3 or more); and b) introducing the first reactor effluent and a second alpha-olefin into a second catalyst composition comprising an acid catalyst, such as BF3, in a second reactor to form a second reactor effluent comprising PAO trimer.

Description

[0001] Inventors: Jennifer L. Rapp, Patrick C. Chen, Jo Ann M. Canich, Mark H. Li, Jian Yang, Catherine A. Faler, Margaret T. Whalley; Andrew E. Atalla [0002] priority [0003] This application claims priority to and the benefit of US Patent Application Serial No. 62 / 926,969, filed October 28, 2019, the disclosure of which is incorporated herein by reference in its entirety. [0004] CROSS-REFERENCE TO RELATED APPLICATIONS [0005] This application is related to USSN 16 / 270,085, filed February 7, 2019. [0006] This application is related to USSN 16 / 394,166, filed April 25, 2019. [0007] This application is related to USSN 16 / 394,197, filed April 25, 2019. [0008] This application is related to USSN 16 / 537,364 filed August 9, 2019, USSN 16 / 537,349 filed August 9, 2019, USSN 16 / 537,381 filed August 9, 2019, and USSN filed August 9, 2019 62 / 885,103. [0009] This application is related to USSN 15 / 706,088, filed September 15, 2017 (published as US 2018 / 0094088). [0010] ...

Claims

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Application Information

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IPC IPC(8): C07C2/08C07C11/02
CPCC07C2/08C07C11/02C07C2531/38C08F210/16C08F2420/00C07C2/30B01J31/22C07C2/34C10M107/10
Inventor J·L·拉普P·C·陈J·A·M·卡尼奇M·H·李杨健C·A·菲勒M·T·威利A·E·阿塔拉
Owner EXXONMOBIL CHEM PAT INC
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