Method for preparing paraxylene and isooctane from diisobutene

A technology for diisobutene and p-xylene, which is applied in the fields of isomerization to produce hydrocarbons, chemical instruments and methods, and hydrogenation to produce hydrocarbons, etc. The effect of efficiency

Active Publication Date: 2014-12-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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[0011] To sum up, these documents and patents do not involve simultaneous aro

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  • Method for preparing paraxylene and isooctane from diisobutene

Examples

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Example

[0030] Examples 1~6 Preparation of catalyst used

Example Embodiment

[0031] Example 1 (Cr 2 O 3 ) 0.05 (MgO) 0.01 Pd 0.02 (Al 2 O 3 ) 0.92 Preparation

[0032] The catalyst was prepared by the impregnation method according to the above metering ratio. 26.3g of chromium nitrate nonahydrate and 6.4g of magnesium nitrate hexahydrate were dissolved in 500mL of deionized water, and then 92g of γ-Al was added to the solution. 2 O 3 The carrier is immersed under stirring for 24h, evaporated to dryness, and then calcined in the air at 600°C for 4h; dissolve 5.0g of palladium nitrate in 500mL of deionized water to prepare a solution, and immerse the calcined solid in the palladium nitrate solution under stirring for 24h, Evaporate to dryness, then calcinate in air at 400°C for 4h. The above catalyst is obtained by introducing hydrogen and nitrogen mixed gas for reduction at 450°C.

Example Embodiment

[0033] Example 2 (Cr 2 O 3 ) 0.10 (K 2 O) 0.015 Ir 0.01 (Al 2 O 3 ) 0.875 Preparation

[0034] The catalyst was prepared by the sol-gel method according to the above measurement ratio. 350.5g of aluminum isopropoxide was dissolved in 500mL of absolute ethanol, 52.7g of chromium nitrate and 3.2g of potassium nitrate were dissolved in 200mL of deionized water. Alcohol solution of aluminum propoxide, adjust the pH to 7 with ammonia water, make the solution gel-like, and become a gel after standing for 24h; then calcinate in the air at 500℃ for 5h; take 2.3g ammonium chloroiridate and dissolve it in 500mL deionized water Solution, immerse the calcined solid in ammonium chloroiridate solution under stirring conditions, immerse for 24h, and calcinate in the air at 400℃ for 4h after drying. After calcination, pass hydrogen and nitrogen mixture to reduce at 450℃ to obtain the above Catalyst.

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Abstract

The invention discloses a method for highly selectively preparing paraxylene and isooctane from diisobutene. The method comprises the following steps: a catalytic reaction apparatus is filled with an aromatization-hydrogenation difunctional catalyst, a diisobutene material enters reactor to catalyze a bed reaction, and the obtained products are separated by a separation device to obtain isooctane and paraxylene. The reinforcement of a hydrogenation reaction makes a hydrogenation process and an aromatization process simultaneously carried out in the same reactor, so the technology is simplified, and paraxylene and isooctane are produced in a combined manner; and a paraxylene and isooctane product with different proportions can be obtained through control of the catalyst composition, the reaction temperature and a material cycle ratio, and the paraxylene and isooctane product can improve the economic benefit as a basic organic chemical product and a fuel additive.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for preparing p-xylene and isooctane (Olefin to Paraffin&p-Xylene, OTPX) from diisobutene with high selectivity. Background technique [0002] P-xylene is an important organic chemical raw material, mainly used for the production of ethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and poly(1,4-cyclohexanedimethanol) terephthalate Raw materials of polyesters such as esters (PCT, PETG) are widely used in many fields such as textiles, plastics, electronics, coatings, dyes and pesticides. The global demand for p-xylene has grown rapidly, reaching 28.2 million tons in 2007, increasing to 29.3 million tons in 2008, and further expanding to 31.52 million tons in 2009 (see: Chambor Zhang. p-xylene market and development prospects, chemical industry , 2010, 28(8):21-23). With the development of polyester industry in my country, the demand for paraxyl...

Claims

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Application Information

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IPC IPC(8): C07C5/31C07C9/16B01J23/652C07C5/03B01J23/36C07C15/08
CPCY02P20/52
Inventor 宋焕玲夏春谷朱刚利李品红
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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