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Method and device for preparing poly-alpha-olefin

A technology for olefins and olefin monomers, which is applied in the field of preparing polyalpha-olefins and devices thereof, and can solve the problems of slow output, low total product yield, low output and the like

Pending Publication Date: 2022-05-27
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, many oligomerization processes have low yields and low overall product yields due to complex reactor setups, such as polymers with cellulosic feed type filter units due to the slow flow of feed through the filter unit. flow slows production

Method used

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  • Method and device for preparing poly-alpha-olefin
  • Method and device for preparing poly-alpha-olefin
  • Method and device for preparing poly-alpha-olefin

Examples

Experimental program
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Embodiment 1

[0240] Example 1: Using dimethylsilylbis(4,5,6,7-tetrahydroindenyl)zirconium dimethyl, N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate and Two dimer samples were produced from the dimerization of 1-decene with tri-n-octylaluminum (TNOA) as a catalyst / activator system. The samples were then distilled without addition of bulk feed or filtration to yield >98% dimer. Initial NMR was performed to confirm the distribution of vinylidene groups to trisubstituted olefins. The samples were then heated to 270°C under nitrogen while stirring for over 22 hours and multiple samples were removed from the tank. All samples were analyzed by NMR and the resulting ratios of trisubstituted olefins to vinylidene olefins are reported in Figure 4 middle. The initial ratio of trisubstituted olefin to vinylidene olefin was about 1:1, but significant isomerization of the olefin to the trisubstituted olefin occurred within 2 hours, resulting in a 9:1 ratio.

Embodiment 2

[0241] Example 2: In the filtered sample, the cellulosic body feed was added and the slurry was filtered to remove all polar components. The sample was then distilled to yield >98% dimer. Initial NMR was performed to confirm the distribution of vinylidene groups to trisubstituted olefins. The samples were then heated to 270°C under nitrogen while stirring for over 14 hours and multiple samples were removed from the jar. All samples were analyzed by NMR. A comparison of trisubstituted dimers at similar reaction times is shown in Figure 5 middle. Figure 5 It was illustrated that dimer samples produced by bypassing the filtration resulted in significant isomerization to produce higher trisubstituted olefins. Figure 5 It was further shown that dimer samples subjected to filtration prior to isomerization showed no change in the amount of trisubstituted olefins.

Embodiment 3

[0242] Example 3: The dimer product from Example 1 was mixed with 0.7 wt% Amberlyst 15 catalyst and heated under nitrogen while stirring to 100°C for over 22 hours. NMR spectroscopy confirmed a ~1:1 distribution of vinylidene to trisubstituted vinylidene olefin. After 22 hours, the ratio by NMR was 1:29 vinylidene to trisubstituted vinylidene olefin. Filtration removes key species involved in the isomerization of vinylidene olefins to trisubstituted olefins. Reintroduction of Lewis acid species, such as Amberlyst catalyst, allows the isomerization to proceed to form predominantly trisubstituted vinylidene olefins.

[0243] In general, the present disclosure provides methods and apparatus for forming polyalpha-olefins by isomerizing a feed to form a feed having a high trisubstituted olefin dimer content. Isomerization of vinylidene dimers to trisubstituted olefin dimers provided higher overall yields of trimers. It has been found that vinylidene dimers can be isomerized in th...

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Abstract

The present disclosure provides a process and apparatus for producing a poly-alpha-olefin. In at least one embodiment, a method of producing a poly alpha-olefin includes introducing a first olefin monomer into a first catalyst and an activator in a first reactor to form a first reactor effluent comprising an olefin dimer and an olefin trimer. The method includes heating the first reactor effluent to form an isomerization product and introducing the isomerization product into a filtration unit to form a filtered effluent. The method may include introducing the filtered effluent into a first distillation unit to form a first distilled effluent. The method may include introducing the first distillation effluent into a second distillation unit to form a second distillation effluent. The process includes introducing the first distillation effluent and / or the second distillation effluent into a second catalyst in a second reactor to form a second reactor effluent comprising olefin trimers.

Description

[0001] Inventors: Monica D. Lotz, Jennifer L. Rapp, Patrick C. Chen and Md Safatul Islam [0002] CROSS-REFERENCE TO RELATED APPLICATIONS [0003] This application claims the benefit of U.S. Provisional Application 62 / 885014, filed August 9, 2019, entitled "Method and Apparatus for Making Polyalpha-Olefins," the entire contents of which are incorporated herein by reference. [0004] This application is related to USSN 62 / 884991, (2019EM298), filed on August 9, 2019, entitled "Methods for the Preparation of Polyalpha-olefins and Methods and Apparatus for Analyzing the Same". technical field [0005] The present disclosure provides methods and apparatus for producing polyalphaolefins. Background technique [0006] Efforts in the petroleum industry to improve lubricant basestock properties through the oligomerization of hydrocarbon fluids have been ongoing for over fifty years. These efforts have led to the introduction of many synthetic lubricant base stocks to the market. ...

Claims

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Application Information

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IPC IPC(8): C07C2/34C07C7/04C07C11/02B01D3/00B01D3/14
CPCC07C2/34C07C7/04B01D3/009B01D3/143C07C2531/22C07C11/02C07C5/25C07C2531/10C07C2531/14C10M177/00C10M2205/0285
Inventor M·D·洛特兹J·L·拉普P·C·陈M·S·伊斯兰姆
Owner EXXONMOBIL CHEM PAT INC
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