Olefin Oligomerization Process

A diesel engine, a range of technology, applied in chemical instruments and methods, processing hydrocarbon oils, hydrocarbon oil processing products, etc., capable of solving problems affecting the relative kinetics of linear and branched chain growth, limiting the degree of branching, etc.

Inactive Publication Date: 2011-12-28
BP OIL INT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to obtain high-quality products, the degree of branching needs to be limited
To this end, two strategies have been proposed in the prior art: controlling and modifying the catalytic sites in the catalyst (such as the strength of its acidity or the nature of its local environment), and using specific zeolite catalysts as follows, which The microporous structure of zeolite catalysts imparts 'shape selectivity' to the oligomerization process, affecting the relative kinetics of linear and branched chain growth

Method used

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  • Olefin Oligomerization Process
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  • Olefin Oligomerization Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Na,K-θ-1 zeolite (Si / Al=25, Na / Al=0.15, K / Al=0.70, and crystal size 200 nm) was treated with NH using the following procedure 4 Cl is exchanged to obtain the hydrogen form: 3 g of zeolite in 80 ml of NH 4 Cl aqueous solution (4.03g NH 4 Cl), at 353K, stirred at reflux for 2 hours. Then, the obtained slurry was filtered, washed and dried at 373K for 12h. Finally it was calcined at 773K for 3 hours.

Embodiment 2

[0052] Zeolite θ-1 in its hydrogen form (Si / Al=50, and rod-shaped crystallites of 200×800 nm) was treated with 0.016M NaNO 3 The solution was exchanged at 353K for 15 hours at reflux with vigorous stirring, using a solution / solid weight ratio of 10. The solid was then isolated by filtration, washed with distilled water and dried overnight at 373K. Finally, the partially exchanged sample was calcined at 773 K for 3 h. The sample prepared in this way had 10 mol % of aluminum (ion exchange sites) which was neutralized by Na (Na / Al=0.10).

Embodiment 3

[0054] Zeolite θ-1 in its hydrogen form (Si / Al=50, and rod-shaped crystallites of 200×800 nm) was treated with 0.008M KNO 3 The solution was exchanged at 353K for 15 hours at reflux with vigorous stirring, using a solution / solid weight ratio of 10. The solid was then isolated by filtration, washed with distilled water and dried overnight at 373K. Finally, the partially exchanged sample was calcined at 773 K for 3 h. The sample prepared in this way had 17 mol% of its aluminum neutralized by K (K / Al=0.17).

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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 C 2 to C 10 alkenes with a zeolite catalyst having partially neutralised acidity and a one-dimensional or two dimensional micropore structure consisting of channels made from rings containing between 10 and 12 silicon/aluminium atoms at a temperature in the range 373 to 773 K and pressure in the range 0.1 to 200 bar characterised in that the partially neutralized zeolite catalyst contains both protons and basic cations. The basic cations are preferably selected from the group comprising Group IA and IIA cations (preferably sodium, potassium, caesium or mixtures thereof). Relative to their equivalent fully protonic forms the partially neutralized zeolite catalysts described show improved catalyst life and selectivity to hydrocarbons

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 a process using as catalyst a zeolite of the MFI or TON type, most preferably theta-1 (TON) type, which has a partially neutralized acidity. 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 processes, depending on the exact nature of the catalyst and its operating conditions, allow the preparation of mixtures of olefins in the gasoline or diesel boiling range. For example, it is known that high temperature (>300°C) and low pressure (≤30 bar) will increase gasoline yield, while lower temperature and higher pressure will favor the formation of heavier oligomers in the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00
CPCB01J2229/186C10G2300/1088C10L1/08B01J29/70C10G2400/04C10G50/00C10G2300/4018B01J37/30
Inventor 阿韦利诺·科尔马卡尼奥斯克里斯蒂娜·马丁尼兹埃里克·多斯科奇尔乔治·亚鲁里斯
Owner BP OIL INT LTD
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