A method for preparing p-xylene and co-producing isooctane from diisobutylene

A diisobutene and p-xylene technology, applied in the direction of isomerization hydrocarbon production, chemical instruments and methods, hydrogenation hydrocarbon production, etc., can solve the problems not involving p-xylene and isooctane processes, etc., and achieve improved aromatization efficiency effect

Active Publication Date: 2016-09-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] To sum up, these documents and patents do not involve simultaneous aromatization and hydrogenation in the same unit to obtain p-xylene and isooctane

Method used

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  • A method for preparing p-xylene and co-producing isooctane from diisobutylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0030] Embodiment 1~6 prepares the catalyst used

Embodiment 1

[0031] Embodiment 1 (Cr 2 o 3 ) 0.05 (MgO) 0.01 PD 0.02 (Al 2 o 3 ) 0.92 preparation of

[0032] Prepare the catalyst by impregnation method according to the above metering ratio, dissolve 26.3g of chromium nitrate nonahydrate and 6.4g of magnesium nitrate hexahydrate in 500mL of deionized water, and then add 92g of γ-Al to the solution 2 o 3 The carrier was impregnated with stirring for 24 hours, evaporated to dryness, and then calcined at 600°C in the air for 4 hours; 5.0 g of palladium nitrate was dissolved in 500 mL of deionized water to prepare a solution, and the calcined solid was immersed in the palladium nitrate solution under stirring conditions for 24 hours. Evaporated to dryness, and then calcined in air at 400°C for 4h. At 450°C, pass through hydrogen-nitrogen mixed gas for reduction to obtain the above-mentioned catalyst.

Embodiment 2

[0033] Embodiment 2 (Cr 2 o 3 ) 0.10 (K 2 O) 0.015 Ir 0.01 (Al 2 o 3 ) 0.875 preparation of

[0034] Prepare the catalyst by the sol-gel method according to the above metering ratio, dissolve 350.5g of aluminum isopropoxide in 500mL of absolute ethanol, dissolve 52.7g of chromium nitrate and 3.2g of potassium nitrate in 200mL of deionized water, and drop into isopropoxide under rapid stirring. Aluminum propoxide ethanol solution, adjust the pH to 7 with ammonia water, make the solution into a gel, and become a gel after standing for 24 hours; then calcined in the air at 500°C for 5 hours; take 2.3g of ammonium chloroiridate dissolved in 500mL of deionized water to prepare Solution, the calcined solid is immersed in the ammonium chloroiridate solution under stirring conditions, soaked for 24 hours, dried and calcined in the air at 400°C for 4h, after the calcining is completed, the hydrogen-nitrogen mixture gas is introduced at 450°C for reduction, and the above-mention...

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Abstract

The invention discloses a method for preparing p-xylene and isooctane from diisobutene with high selectivity. A catalytic reaction device is filled with an aromatization-hydrogenation bifunctional catalyst, and the diisobutene material enters the catalytic bed of the reactor to react, Isooctane and p-xylene are obtained after the product is separated by a separation device. By strengthening the hydrogenation reaction, the present invention enables the hydrogenation process and the aromatization process to be carried out simultaneously in the same reactor, simplifies the process, can co-produce p-xylene and isooctane, and controls the composition and reaction of the catalyst. Different ratios of paraxylene and isooctane can be obtained depending on temperature and material circulation ratio, which can be used as basic organic chemicals and fuel additives to improve economic benefits.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/08C07C9/16C07C5/31C07C5/03B01J23/652B01J23/36
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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