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Catalyst of toluene disproportionation and alkyl transference, and preparation method and application thereof

A technology of alkylation transfer and toluene disproportionation, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., to reduce secondary reactions, reduce carbon deposition, and improve performance

Active Publication Date: 2014-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, most of the existing toluene disproportionation and transalkylation catalysts use mordenite, Beta molecular sieve or ZSM-5 molecular sieve, and one or several necessary metal components or molecular sieves need special modification treatment at the same time. Performance needs to be further improved

Method used

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  • Catalyst of toluene disproportionation and alkyl transference, and preparation method and application thereof
  • Catalyst of toluene disproportionation and alkyl transference, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Synthesis and treatment of embodiment 1 EU-1 / Beta composite molecular sieve

[0043] (1) Synthesis of EU-1 / Beta Composite Molecular Sieve

[0044] Add sodium aluminate, distilled water, and tetraethylammonium hydroxide successively into the beaker, stir evenly, then add EU-1 molecular sieve, stir for 10 minutes, finally add white carbon black, stir for 30 minutes, and then put it into the synthesis kettle.

[0045] The ratio of materials in synthetic materials is:

[0046] EU-1 / SiO2 2 (g / g) = 0.35;

[0047] R / SiO 2 (mol / mol) = 0.50;

[0048] SiO 2 / Al 2 o 3 (mol / mol)=112;

[0049] Na 2 O / SiO 2 (mol / mol) = 0.52;

[0050] h 2 O / SiO 2 (mol / mol)=32.

[0051] The synthetic material was heated in an oven at 140°C for 4 days, the obtained product was filtered, washed with distilled water until neutral, dried, and calcined at 550°C for 5 hours to obtain EU-1 / Beta composite molecular sieve.

[0052] The XRD spectrum of this EU-1 / Beta composite molecular sieve is a...

Embodiment 2

[0057] The preparation of embodiment 2 carrier

[0058] Take 45 grams of the hydrogen-type EU-1 / Beta composite molecular sieve prepared in Example 1, 145.8 grams of SB powder, and 3.75 grams of scallop powder, mix well, then add 70ml of deionized water and 3.75ml of concentrated nitric acid (66.5wt%) in Fully kneaded on a roller compactor to make it into a paste-like plastic, extruded a cylindrical rod with a diameter of 1.5mm on an extruder, dried at 110°C for 8 hours, and then calcined at 550°C for 4 hours in an air atmosphere to obtain catalyst precursor D1.

[0059] Take 105 grams of the hydrogen-type EU-1 / Beta composite molecular sieve prepared in Example 1, 62.5 grams of SB powder, and 3.75 grams of sage powder, mix well, then add 100ml of deionized water and 3.75ml of concentrated nitric acid (66.5wt%) in the mill Fully knead on the press to make it into a paste-like plastic, extrude a cylindrical rod with a diameter of 1.5mm on the extruder, dry at 110°C for 8 hours, a...

Embodiment 3

[0061] Take the catalyst precursor D1 prepared in Example 2, soak it in the aqueous solution of bismuth nitrate for 24 hours, then dry it at 110° C. for 6 hours, and roast it at 540° C. for 4 hours to obtain the Bi-containing 2 o 3 0.2% by weight of catalyst E1. The catalyst composition and evaluation results are shown in Table 2.

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Abstract

The invention discloses a catalyst of toluene disproportionation and alkyl transference, and a preparation method and an application thereof. The catalyst comprises 10 wt%-90 wt% of hydrogen Eu-1 / Beta composite molecular sieve, 5 wt%-85 wt% of an inorganic refractory oxide, 0.1 wt%-10 wt% of bismuth oxide, and 0.1 wt%-10 wt% of one or more of molybdenum oxide, silver oxide, zirconium oxide, strontium oxide, lanthanum oxide, copper oxide and rhenium oxide. The composite molecular sieve catalyst of toluene disproportionation and alkyl transference has good usage performance without loading metal components, and has relatively high toluene conversion rate and relatively high selectivity of benzene and dimethylbenzene (B+C8A).

Description

technical field [0001] The invention relates to a toluene disproportionation and transalkylation catalyst and its preparation method and application, in particular to a toluene disproportionation and transalkylation catalyst using a composite molecular sieve and its preparation method and application. Background technique [0002] Toluene disproportionation and transalkylation technology is one of the most important processes in large-scale aromatics complexes, the purpose of which is to convert relatively surplus toluene and C 9 Aromatics are converted into benzene and xylenes, which are widely used but in short supply to meet market demand. In the chemical fiber-type modern aromatics complex, the toluene disproportionation unit plays a pivotal role, and its contribution of benzene and xylene accounts for 50% to 70% of the total benzene and xylene in the entire aromatics complex. [0003] Molecular sieve catalysts are usually used for the disproportionation of toluene and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C07C15/04C07C15/08C07C6/12
CPCY02P20/52
Inventor 贾立明张志智张喜文刘全杰徐会青王伟
Owner CHINA PETROLEUM & CHEM CORP
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