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Preparation method of C10<+> heavyweight aromatic hydrocarbon transalkylation catalyst

An aromatic hydrocarbon alkylation and catalyst technology, which is applied in the field of preparation of C10+ heavy aromatic hydrocarbon transalkylation catalysts, can solve the problems of hydrogen gas and catalyst deactivation, short life, low activity of heavy aromatics, and large alkyl loss, etc., to overcome Fast deactivation, short life, overcoming poor stability, and prolonging catalyst life

Active Publication Date: 2015-02-25
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Chinese patent CN102746093A uses hydrogen-type binderless ten-membered ring zeolite loaded with platinum or palladium as a catalyst, the reaction temperature is 320-450°C, the reaction pressure is 2-4MPa, and the weight hourly space velocity of hydrocarbon raw materials is 1-4h -1 , under the reaction conditions of 3-10:1 molar ratio of hydrogen hydrocarbon raw materials, heavy aromatics are subjected to hydrocracking reaction, and the BTX content in the product is above 57%, C 9 About 20% aromatics, but at least 11-15% low-carbon non-aromatics, with large loss of alkyl groups
[0012] The above method works for C 10 + The activity of heavy aromatics is not high, mainly used to deal with C 9 + Aromatic hydrocarbons (mainly including C 9 and part C 10 Aromatics), and the loss of alkyl groups is large, and a large amount of low-carbon non-aromatics are generated, which is a major defect of the current heavy aromatics lightening technology
[0013] The purpose of the present invention is to overcome the disadvantages of poor flexibility in the conversion of aromatic hydrocarbons in the prior art, and generally the shortcomings of the need to consume a large amount of hydrogen in the reaction to hydrogen and the shortcoming of catalyst deactivation and short life, and provide a C 10 + Non-hydrogenated transalkylation catalyst for heavy aromatics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 140g (calculated on a dry basis, the same below) HY molecular sieve with a grain size of 100 nanometers and 60g of alumina and 6.7g of scallop powder, mix evenly, and knead with dilute nitric acid with a mass percentage concentration of 4% as a solvent to knead and extrude. After natural drying at 120°C for 12 hours, the temperature was programmed to rise to 550°C for 4 hours to obtain a semi-finished catalyst. Then weigh 12.14g of lead nitrate to prepare a mixed aqueous solution, impregnate the obtained semi-finished catalyst with equal volume at room temperature for 24 hours, dry at 120°C for 12 hours, and then heat up to 550°C for 4 hours to obtain catalyst B.

Embodiment 2

[0041] Take 140g of HY molecular sieve with a grain size of 80nm, mix it with 60 alumina and 4.5g of turnip powder evenly, knead and extrude it with dilute nitric acid with a concentration of 4% by mass as a solvent, and dry it at 120°C after natural drying After 12 hours, the temperature was programmed to rise to 550° C. and calcined for 4 hours to obtain a semi-finished catalyst. Then weigh 9.21g of ammonium metamolybdate to prepare a mixed aqueous solution, impregnate it with the obtained semi-finished catalyst at room temperature for 24 hours, dry at 120°C for 12 hours, and then heat up to 550°C for 4 hours to obtain catalyst C.

Embodiment 3

[0043] Take 140g of HY molecular sieve with a grain size of 50 nanometers, mix with 60g of alumina and 3.3g of turnip powder, knead and extrude it with dilute nitric acid with a mass percentage concentration of 4% as a solvent, and dry it naturally at 120°C for 12 hours Afterwards, the temperature was programmed to rise to 550° C. for 4 hours to obtain a semi-finished catalyst. Then weighed 10.37g of nickel nitrate to prepare a mixed aqueous solution, impregnated it with the obtained semi-finished catalyst at room temperature for 24 hours, dried at 120°C for 12 hours, and then programmed the temperature to 550°C for 4 hours to obtain catalyst D.

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Abstract

The invention discloses a preparation method of a C10<+> heavyweight aromatic hydrocarbon transalkylation catalyst. The preparation method is characterized in that firstly, the catalyst is prepared from a main active component named a HY molecular sieve with the mass percentage of 50-80% and the grain size of 30-100 nanometers, an adhesion agent named aluminum oxide of 15-40% and a modifying agent component named metal or a metallic oxide of 1-8%; secondly, the catalyst is prepared by the following steps: 1) mixing the nano HY molecular sieve with aluminum oxide, adding a squeeze aid, a pore-enlarging agent or an intensity additive with the mass percentage of no more than 5%, carrying out extrusion molding with a dilute nitric acid solution with mass percentage concentration of 4%, airing naturally, drying at 100-120 DEG C for 10-15 hours, then carrying out temperature programming to 550 DEG C, and roasting for 4-6 hours, thereby preparing a semi-finished catalyst; and 2) adding the product in the step 1) into a metal salt solution of the modifying agent component, dipping at room temperature with the equal volume for 6-30 hours, drying at 100-120 DEG C for 10-15 hours, then carrying out temperature programming to 550 DEG C, and roasting for 4-6 hours, thereby obtaining the finished product of the catalyst.

Description

technical field [0001] The present invention relates to a C 10 + Process for the preparation of heavy aromatic hydrocarbon transalkylation catalysts, especially with regard to C 10 A or / and C 11 + A preparation method of a catalyst for preparing light aromatics such as benzene, toluene and xylene through transalkylation of heavy aromatics (A is referred to as aromatics, the same below). Background technique [0002] Heavy aromatics are a valuable petrochemical resource, mainly derived from the by-products of light oil cracking to produce ethylene units, the extracted aromatics from catalytic reforming in refineries, and the by-products of toluene disproportionation and transalkylation units. In recent years, with the continuous improvement of my country's oil refining capacity and the successive commissioning of continuous reforming units in large petrochemical enterprises, the output of heavy aromatics has increased significantly. At the same time, with the development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J29/16B01J29/14C07C6/12C07C15/08
CPCY02P20/52
Inventor 于海斌吴青臧甲忠杨纪邢淑建秦会远范景新姜瑶刘冠锋兰晓光
Owner CHINA NAT OFFSHORE OIL CORP
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