Catalyst composition containing modified ZSM-11 zeolite and application of catalyst composition

A ZSM-11, catalyst technology, applied in the application field of the catalyst in the synthesis of p-methylethylbenzene from toluene and ethylene, can solve the problems of side reactions, low conversion rate of toluene, low selectivity of methylethylbenzene, etc. Achieve the effects of improving selectivity, suppressing side reactions such as alkylation transfer, and reducing operation difficulty and energy consumption

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a catalyst composition containing modified ZSM-11 zeolite and its application in the synthesis of p-methylethylbenzene from toluene and ethylene, which solves the problem of the insufficiency of toluene conversion in the prior art. High, low selectivity to methyl ethyl benzene, serious side reactions such as disproportionation reaction and isomerization reaction, etc., so as to improve the effect of toluene alkylation reaction

Method used

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Effect test

Embodiment 1

[0027] [Example 1] (if there is no special note below, the percentage content and composition are based on weight)

[0028] The preparation steps of catalyst composition of the present invention are as follows:

[0029] (1) Take 300 grams of ZSM-11 zeolite with a silicon-aluminum ratio (silica / alumina molar ratio, the same below) of 80, and prepare 450 milliliters of a magnesium chloride solution with a magnesium oxide content of 50 grams. The above solution containing magnesium chloride and ZSM-11 zeolite are fully mixed, dried at 110°C and calcined at 500°C for 4 hours, the composition of the obtained sample is: magnesium oxide / ZSM-11=1 / 6.

[0030] (2) Magnesium-modified ZSM-11 zeolite (350 grams) prepared in step (1), and then the n-hexane solution of polyphenylmethylsiloxane with a content of 25 grams in terms of silicon dioxide prepared 500 ml was impregnated, and left to stand after impregnated until the solvent was completely evaporated, dried and then roasted at 550°C t...

Embodiment 2

[0033] The preparation method of a kind of catalyst of the present invention is the same as embodiment 1, and the difference is that the silicon-alumina ratio of the ZSM-11 zeolite used is 38, and the composition of the catalyst obtained is: Na 2 O: 1.5%, SiO 2 : 5%, MgO: 10%, ZSM-11: 60%, binding agent: 23.5%, numbering is E-2, its reaction result in the selective alkylation of toluene and ethylene is shown in Table 1.

Embodiment 3

[0035] The preparation method of a kind of catalyst of the present invention is the same as embodiment 1, and difference is that used magnesium-containing compound is magnesium nitrate, and used binding agent is silica sol, and the composition of the catalyst that obtains is: Na 2 O: 1.5%, SiO 2 : 5%, MgO: 10%, ZSM-11: 60%, binding agent: 23.5%, numbering is E-3, its reaction result in the selective alkylation of toluene and ethylene is shown in Table 1.

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Abstract

The invention relates to a catalyst composition containing modified ZSM-11 zeolite and an application of the catalyst composition. The catalyst composition comprises the following components of: 30-85 percent of ZSM-11 zeolite, 10-60 percent of binding agent, 0.1-10 percent of alkali metal oxide, 1-20 percent of ZSM-11 zeolite modified additive SiO2 and 1-20 percent of ZSM-11 zeolite modified additive alkali metal oxide. The catalyst composition disclosed by the invention is used in a methylbenzene alkylation process for synthesizing p-methyl methylbenzene from methylbenzene and ethylene and is favorable in catalytic reaction effect.

Description

technical field [0001] The invention relates to a catalyst composition containing modified ZSM-11 zeolite and its application, especially the application of the catalyst in synthesizing p-methylethylbenzene from toluene and ethylene. Background technique [0002] Dehydrogenation of p-methylethylbenzene can produce p-methylstyrene, which can be polymerized to produce a new type of plastic, polymethylstyrene. The polymer is superior to existing polystyrene plastics in terms of specific gravity, heat resistance, transparency and shrinkage. In addition, p-methylstyrene can be copolymerized with other monomers, which can improve the heat resistance and flame retardancy of some polymers, and can be widely used in the manufacture of engineering plastics, alkyd resin coatings, etc., so it has been widely valued. For a long time, there is no satisfactory method for obtaining high-concentration p-methylethylbenzene. To obtain para-position products, there must be a shape-selective ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C15/02C07C2/66
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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