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Method for preparing isooctane

A technology of isooctane and isooctene, which is applied in the field of preparing isooctane, can solve the problems of high utilization value and economic disadvantages of octane isomers, and achieve the effect of economical advantage and simple process

Inactive Publication Date: 2005-06-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, although the direct hydrogenation of mixed octene obtained from butene oligomerization can also obtain a mixture of various isomeric octanes, only trimethylpentane is the best additive to increase the octane number of gasoline, while mixed The dimethylhexene and methylheptene contained in octene are converted into corresponding alkanes by hydrogenation, and their utilization value is far lower than that of trimethylpentane, and further separation of various octane isomers is economical. It's not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a stainless steel autoclave with an inner volume of 70ml, add 0.2345g of cobalt acetate (Co(CH 3 COO) 2 4H 2 O, Beijing Yili Fine Chemicals Co., Ltd. product), 1.3130g triphenylphosphine oxide (Ph 3 PO, product of Beijing Hongyu Chemical Company), 15ml (10.5g) mixed octene and 5ml methanol (solvent). After sealing the reactor, fill the reactor with synthesis gas (CO / H 2 =1 / 1) to 3MPa, and then release the pressure to normal pressure, repeating this three times to replace the air in the reactor. Heat the reactor to 160°C under normal pressure, then fill the reactor with synthetic gas (CO / H 2 =1 / 1) to 8MPa, react at 160°C for 2.5 hours under stirring, during the reaction, continuously supply synthesis gas and keep the pressure stable at 8MPa. After the hydroformylation reaction, stop the pressure supply, cool the reaction kettle to room temperature and reduce the pressure in the kettle to normal pressure, then take out the mixed liquid in the kettle and carry out ...

Embodiment 2

[0027] Except that the reaction temperature is 140° C., other operations are the same as in Example 1. The reaction results are listed in Table 1.

Embodiment 3

[0029] Except that the reaction temperature is 120° C., other operations are the same as in Example 1. The reaction results are listed in Table 1.

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PUM

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Abstract

The invention relates to a method for preparing isooctane which belongs to oil chemical field. Use mixed octane (mix C8 olefin ) as the raw material, in the friendly reacting condition, use titanium catalyzer or rhodium catalyzer to make hydroformylation, obtaining isononaldehyde, and the isooctylen remained generates isooctane by adding hydrogen, and its catalyzer is palladium active carbon catalyzer. The invention combines the mixed octylen hydroformylation technique with adding hydrogen technique which uses the isooctylen remained as raw material, so that can generate isononaldehyde and isooctane at the same time, which can generate the two products with high additive value by making good use of the raw material, with economic benefit, simple technique and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for preparing isooctane, which belongs to the field of fine petrochemical industry. The method is based on mixed octene (mixed C 8 ene) as a raw material, first through the hydroformylation reaction to obtain isononanal (mixed C 9 After aldehyde), the unreacted isooctene (trimethylpentene) is further hydrogenated to obtain isooctane (trimethylpentane). Background technique [0002] Isooctane is an important organic chemical used as a gasoline additive to increase the octane number of gasoline. Industrially, isooctane-rich C can be obtained by hydrogenation of mixed octene 8 Alkane mixture (such as Chinese Patent Publication No. 1381549, US Patent US 08-975867). Mixed octene can be obtained by oligomerization of butene. Due to the different catalysts and processes used, the types and quantities of various isomers contained in mixed octene after butene oligomerization are also different, mainly containing trimethylp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/00C07C5/03C07C9/16C07C45/49C07C47/02
Inventor 贺德华魏岚董国利
Owner TSINGHUA UNIV