Catalyst used for heavy arene lightenation and alkyl transfer and its preparation method

A technology for transalkylation and heavy aromatic hydrocarbons, which is used in catalyst activation/preparation, physical/chemical process catalysts, hydrocarbon cracking to produce hydrocarbons, etc. The problems of lightening heavy aromatic hydrocarbons and transalkylation catalysts can achieve the effects of high conversion rate, increased acid strength and acid content, and good technical effects.

Inactive Publication Date: 2007-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] One of the technical problems to be solved by the present invention is to overcome the low conversion rate of the single pure zeolite molecular sieve catalyst used in the prior art for the lightening of heavy aromatics and transalkylation reactions, the need to support precious metals and the requirements for raw material composition Strict technical problem, to provide a new catalyst for lightening and transalkylation of heavy aromatics
[0020] The second technical problem to be solved by the present invention is that there is a problem in the prior art that symbiotic molecular sieves are not made into catalysts for the lightening of heavy aromatics and transalkylation reactions, and a new catalyst for lightening heavy aromatics is provided And the preparation method of transalkylation catalyst

Method used

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  • Catalyst used for heavy arene lightenation and alkyl transfer and its preparation method
  • Catalyst used for heavy arene lightenation and alkyl transfer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0038] Synthesis of BEA / MOR intergrowth molecular sieve used in the present invention

[0039] The BEA / MOR symbiotic molecular sieve used is synthesized according to Chinese patent ZL 02120815.8.

[0040] According to a certain proportion, sodium aluminate (analytically pure, commercially available), silica sol (industrial product, content 25% by weight), tetraethylammonium bromide (content 98% by weight, chemically pure), ammonia water (containing NH 3 25% by weight, analytically pure, commercially available), tetraethylammonium hydroxide (content 25% by weight, commercially available), sodium fluoride (analytically pure, commercially available), sodium hydroxide (analytically pure, commercially available product) to form a reaction system, mix evenly, transfer to a stainless steel crystallization kettle, and crystallize at 140-160°C for 1-3 days. After the crystallization, suction filtration, washing, and drying were carried out to obtain BEA / MOR intergrowth molecular siev...

Embodiment 6～10

[0044] Take the five different BEA / MOR symbiotic molecular sieves prepared in Examples 1-5, and exchange them with 1.0 M ammonium nitrate solution at 90° C. for 4 hours at a constant temperature; after filtering, repeat 3 times, and wash the filter cake with deionized water. The filter cake was dried at 110°C to obtain ammonium-type BEA / MOR symbiotic zeolite molecular sieves A1, B1, C1, D1, and E1.

[0045] A1, B1, C1, D1, E1 were respectively calcined at 550°C for 4 hours to prepare hydrogen-form BEA / MOR symbiotic zeolite molecular sieves A2, B2, C2, D2, E2.

[0046] Take 77.8 grams each of A2, B2, C2, D2, and E2, and combine them with Na 2 42.9 grams of pseudo-boehmite with an O content of less than 0.15% and a weight loss on ignition of 30% and an appropriate amount of extrusion aid scallop powder are mixed evenly, and 2 milliliters of chemically pure nitric acid and 60 milliliters of deionized water are added, fully mixed, kneaded, and carried out The catalysts A, B, C, D...

Embodiment 11

[0048] Take the BEA / MOR symbiotic molecular sieve prepared in Example 1, and exchange it with 1.0 M ammonium chloride solution at 90° C. for 2 hours at a constant temperature; after filtering, repeat 3 times, and wash the filter cake with deionized water. The filter cake was dried at 110°C to obtain ammonium-type BEA / MOR co-generated zeolite molecular sieve F1.

[0049] Take 44.4 grams of F1 molecular sieve and γ-Al 2 o 3 85.7 grams and an appropriate amount of extrusion aid Selina powder are mixed uniformly, add 2 milliliters of chemically pure nitric acid, and 60 milliliters of deionized water, fully mix, knead evenly, carry out extruding molding, drying, pelletizing, roasting and activating, and catalyst F is obtained .

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Abstract

A catalyst for lightening heavy arylhydrocarbon and transferring alkyl with high transform rate and low cost is prepared from the beta-zeolite and mordenite symbiotic molecular sieve (10-80 Wt%) and at least one inorganic adhesive chosen from gamma- Al2O3, alpha-AlO(OH), SiO3, silicon aluminum oxide, bentone, kaolinite, diatomite and montmorillonite through ammonium salt exchange to said symbiotic molecular sieve, calcining to become hydrogen-type symbiotic molecular sieve, mixing it with said adhesive, shaping, drying, and calcining.

Description

technical field [0001] The invention relates to a catalyst for lightening and transalkylation of heavy aromatics and a preparation method thereof, in particular to a catalyst for lightening and transalkylation of heavy aromatics with carbon nine and above and a preparation method thereof. Background technique [0002] Heavy aromatics (or heavy aromatics) refer to the by-products of carbon nine and above aromatics in the process of petroleum and coal processing, mainly from the by-products of light oil cracking to produce ethylene; aromatics extracted from catalytic reforming in refineries; polyester raw material plants Distillate catalytic reforming unit by-product C 10 (C10) heavy aromatics; by-products of toluene disproportionation and transalkylation units; by-products of ethylene tar from ethylene units. With the increase of refining capacity, the construction of a large-scale ethylene production base with a million tons level and the large-scale aromatics complex, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/18B01J37/30B01J37/08B01J37/00C07C4/06C07C4/00
Inventor 祁晓岚孔德金王东辉朱志荣
Owner CHINA PETROLEUM & CHEM CORP
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