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Alkene oligomerization process

A technology of olefins and hydrocarbon fractions, which is applied in the field of olefin oligomerization, and can solve problems such as limiting the degree of branching

Active Publication Date: 2012-05-23
BP OIL INT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain high quality products, the degree of branching needs to be limited

Method used

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  • Alkene oligomerization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 3 g of hydrogen form θ-1 zeolite (H-θ-1, Si / Al=50) was suspended in 100 ml of 0.2 M aqueous sodium hydroxide solution and vigorously stirred at 80° C. for 30 minutes. The reaction was then quenched by cooling in an ice bath. The remaining solid was isolated by filtration, washed with distilled water and dried overnight at 100°C. Then, at 83 °C with 0.1 M NH 4 NO 3 The solution was exchanged three times continuously for 2 hours with a liquid-solid weight ratio of 20 to convert the alkali-treated θ-1 into its acid form. Finally the samples were fired at 450°C for 5 hours. This modified zeolite catalyst exhibits distinct mesoporous (V 介孔 =0.107cm 3 g -1 ).

Embodiment 2

[0049] 3 g of theta-1 zeolite in the hydrogen form (H-θ-1, Si / Al=50) was suspended in 100 ml of 0.2 M aqueous sodium hydroxide solution and vigorously stirred at 85° C. for 30 minutes. The reaction was then quenched by cooling in an ice bath. The remaining solid was isolated by filtration, washed with distilled water and dried overnight at 100°C. Next, the base-treated θ-1 was suspended in a 2.0 M aqueous solution of oxalic acid (liquid / solid ratio 10 w / w) and stirred at 70° C. for 2 hours. The solid was isolated by filtration, washed with distilled water and dried overnight at 100°C. Finally the samples were fired at 375°C for 3 hours. The modified zeolite catalyst exhibits mesoporous (V 介孔 =0.117cm 3 g -1 ).

Embodiment 3

[0051] 3 g of zeolite in hydrogen form θ-1 (H-θ-1, Si / Al=25) was suspended in 100 ml of 0.2 M aqueous sodium hydroxide solution and vigorously stirred at 85° C. for 30 minutes. The reaction was then quenched by cooling in an ice bath. The remaining solid was isolated by filtration, washed with distilled water and dried overnight at 100°C. Next, at 80 °C with 0.1 M NH 4 NO 3 The solution was exchanged three times continuously for 2 hours with a liquid-solid weight ratio of 20 to convert the alkali-treated θ-1 into its acid form. Finally the samples were fired at 450°C for 5 hours. The modified zeolite catalyst exhibits mesoporous (V 介孔 =0.067cm 3 g -1 ).

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Abstract

Disclosed is a process for producing a hydrocarbon fraction rich in components boiling in the range typical for diesel fuel comprising contacting a feedstock comprising one or more C2 to C10 alkenes with a modified zeolite catalyst having a one-dimensional micropore structure consisting of channels made from rings containing between 8 and 12 silicon / aluminium atoms at a temperature in the range 100 to 5000C and pressure in the range 0.1 to 200 bar characterised in that the modified zeolite catalyst is one which has been prepared by treating a corresponding zeolite precursor with an alkaline solution. The alkaline solution used to treat the zeolite precursor can be for example aqueous sodium hydroxide solution. Relative to equivalent untreated zeolites the modified zeolite catalysts described show improved catalyst life and selectivity to hydrocarbons boiling in the range 250 to 3500C.

Description

technical field [0001] The present invention relates to a heterogeneous process for the oligomerization of olefins to produce hydrocarbon fractions suitable for use as diesel fuel. In particular, the present invention relates to processes using basic solution-treated zeolites as catalysts. Background technique [0002] Oligomerization of light olefins such as propylene and butene represents an important industrial route to produce environmentally friendly synthetic liquid fuels free of sulfur and aromatics. These methods can produce mixtures of olefins in the gasoline or diesel boiling range, depending on the exact nature of the catalyst and operating conditions. For example high temperature (>300°C) and low pressure (≤30 bar) are known to increase gasoline yield, while low temperature and high pressure promote the formation of high carbon oligomers in the diesel fraction. [0003] Acid-catalyzed oligomerization of light olefins to diesel range products, typically via a...

Claims

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Application Information

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IPC IPC(8): C10G50/00B01J29/70
CPCC10G2400/04C10G50/00B01J29/7042C10G2300/70B01J2229/16C10G2300/4018C10L1/08B01J2229/38B01J2229/22C10G2300/1088B01J29/06B01J35/1061B01J35/647
Inventor 阿韦利诺·科玛克里斯蒂娜·马蒂内兹埃里克·J·多斯科奇尔乔治·亚路里斯
Owner BP OIL INT LTD
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