Catalytic reforming catalyst containing LTL type molecular sieve

A catalytic reforming and molecular sieve technology, applied in the reforming of naphtha, petroleum industry, etc., can solve the problems of device equipment and pipeline corrosion, pump valve blockage, easy loss of Cl element, etc., achieve high reactivity and reduce device operation The effect of safety hazards

Inactive Publication Date: 2018-07-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the reaction process, the necessary Cl element on the alumina-type catalytic reforming catalyst is easy to lose, so it is necessary to continuously add chlorine-containing organic matter in the raw material, which causes corrosion of equipment and pipelines, and the Cl-containing crystals are easy to cause Blockage of the pump valve, which brings hidden dangers to smooth operation and safe production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Linde Type L molecular sieve (also called L zeolite) was purchased from the market and placed in La(NO 3 ) 3 In the aqueous solution, fully stir for 1 hour to realize ion exchange, after washing, drying and roasting at 550°C, then exchange, wash, dry and roast twice under the same conditions, the 100mol% K in the L-type molecular sieve is determined + By La 3+ Alternate, H + The content is 0. The ion-exchanged molecular sieve was placed in chloroplatinic acid solution, and Pt was loaded on the molecular sieve by impregnation method. After drying, it was pressed into tablets and crushed to form granular catalyst 1 with a Pt content of 0.3 wt%.

Embodiment 2

[0033] L zeolite was synthesized in the laboratory and placed in Eu(NO 3 ) 3 In dilute nitric acid solution, fully stir for 5 hours to realize ion exchange, after washing, drying and roasting at 550°C, the K in L-type molecular sieve is determined to be 80mol%. + By Eu 3+ Alternative, 5mol% K + By H + substitute. Place the ion-exchanged molecular sieve in IrCl 3In the solution, Ir is loaded onto the molecular sieve by impregnation method, dried and ground into a powder catalyst, and pseudo-boehmite (precursor of γ-alumina) 9 times the weight of L zeolite is added as a binder, and then Nitric acid, citric acid, and squash rubber powder of 0.2 times the weight of L zeolite are used as extrusion / pore-enlarging agents. They are formed into a clover shape in an extruder, and catalyst 2 is finally obtained after drying, breaking, and roasting at 550 ° C. The obtained Ir content is 0.1wt%, the gamma-alumina in the carrier accounts for 90wt%, and the L zeolite accounts for 10wt%...

Embodiment 3

[0035] L zeolite was synthesized in the laboratory and placed in Ce(NO 3 ) 3 solution, fully stirred for 1 hour to realize ion exchange, after washing, drying and roasting at 550°C, the 5mol% K in the L-type molecular sieve was determined + By Ce 3+ substitute. The ion-exchanged molecular sieves were placed in PdCl 3 In dilute hydrochloric acid solution, Pd is loaded on the molecular sieve by impregnation method, after drying, it is pressed into tablets and crushed to form granular catalyst 3, and the measured Pd content is 50wt%.

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PUM

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Abstract

The invention relates to a catalytic reforming catalyst containing an LTL type molecular sieve. The catalytic reforming catalyst comprises the following components: (1) a catalyst carrier composed of10-100wt% of an LTL type molecular sieve and 0-90wt% of a binding agent; (2) lanthanide metal ions exchanging and replacing 5-100mol% of positive ions in the LTL type molecular sieve, wherein the content of the lanthanide metal ions is higher than or equal to 5mol% of the total amount of the positive ions, and the content of H<+> in the LTL type molecular sieve is less than 5mol% of the total amount of the positive ions; and (3) at least one VIIIB group metal contained on the catalyst, wherein the content of the VIIIB group metal on the catalyst accounts for 0.1-50wt% of the carrier. The catalytic reforming catalyst provided by the invention can realize dehydrogenation, dehydrocyclization, aromatization and the like and has relatively high reaction activity, selectivity and stability.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, and relates to a catalytic reforming catalyst containing LTL molecular sieves exchanged by lanthanide metal ions, which is used for dehydrogenation of raw materials such as naphtha and light hydrocarbons in petroleum refining and petrochemical Cyclization and aromatization reactions. Background technique [0002] Catalytic reforming is an important process for producing high-octane gasoline and light aromatics mainly from naphtha. Currently, commercial catalytic reforming catalysts use mesoporous alumina (Al 2 o 3 ) as a carrier, supporting halogens such as Cl and noble metal elements such as Pt, so as to realize the dehydroaromatization process of naphtha raw materials. In recent years, metal additives Re or Sn have been added to the catalyst to improve catalytic selectivity and stability. Such related catalyst patents include US3915845, EP0901814A1, CN96103410.6, CN02809057....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/095
Inventor 张鹏胡长禄李知春韩晓琳喻昊李金吕雉龚奇菡崔佳潘晖华桂鹏张上
Owner PETROCHINA CO LTD
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