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Isomerization catalyst as well as preparation method and application thereof

A catalyst and isomerization technology, which can be used in catalyst activation/preparation, isomerization to produce hydrocarbons, catalysts in physical/chemical processes, etc. It can solve the problem of catalyst activity decline, reduce reaction by-products, and achieve high conversion activity and stability. good effect

Active Publication Date: 2021-08-24
润和科华催化剂上海有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the excessive dehydration of the catalyst will make the directly catalytic B acid center convert to the L acid center, which will also lead to a decrease in catalyst activity; Activity of dehydration catalyst

Method used

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  • Isomerization catalyst as well as preparation method and application thereof
  • Isomerization catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] In this embodiment, the precursor of the high pore volume of the present invention is prepared, i.e., high porous hydrogen oxide dry rubber powder. Continuously dropped with sodium aluminate solution (alumina) solution (alumina 10M%) of aluminum aluminum aluminum aluminum aluminum aluminum aluminum sulfate solution (alumina) solution (aluminum oxide 10 m%), and the control flow rate is washed under the conditions of the pH of 8.5 to 9.5. , High porous hydrogen oxide powder dry rubber powder obtained after drying.

Embodiment 2

[0089] In this embodiment, the microcrystalline silica aluminum oxide zeolite precursor is prepared. Referring to the prior art USP3130007 (FAU structure zeolite), USP3308069 (BEA structure zeolite), USP3130006 (LTL structure zeolite), USP4076842 (TON structure zeolite), USP3702886 (MFI structure zeolite) Patent Document Embodiments In Examples Step, obtain different structural types of hydrated silicon aluminum oxide such as FAU, BEA, MOR, LTL, TON, MFI, and placed in a crystallization in crystalline.

[0090] According to the law of the crystallization curve of the three S type during the zeolite crystalization process, the crystalline crystal is stopped when the crystalline crystalline is stopped, and the hydrothermal oxide of the zeolite crystal is stopped. Body, filtration, dry after washing, which is presented in an XRD diffraction pattern.

[0091] The filtered solid was adjusted under acidic conditions of pH 3.5 to 4 under acidic conditions of pH 3.5 to 4, and the hydrothe...

Embodiment 3

[0093] This example is prepared in the SO in the present invention 4 ＝ / Zro 2 Solid super acid, ie, zirconium hydroxide after acidification of sulfate. Zirconium chloride (ZroCl) 2 .8h 2 O) A 5M% aqueous solution, slowly added a concentration of 25 m% of ammonia water while stirring, adjusting the pH to 8 to 9.5, and the resulting zirconium hydroxide precipitate is transferred to the autoclave seal, and water at 130 ° C The heat treatment was 24 hours; the solid was filtered and washed with detached water until CL was detected in the filtrate. - It was dried at 110 ° C for 24 hours to produce zirconium hydroxide powder.

[0094] The solution of 0.5 mole / liter of sulfuric acid was impregnated with 0.5 mol / liter sulfuric acid in a liquid / solid mass ratio of 1 to 1.2, and the SO of the present invention was obtained. 4 ＝ / Zro 2 Solid super acid precursor, zirconium hydroxide after acidification of sulfate.

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Abstract

The invention relates to an isomerization catalyst, and belongs to the technical field of petrochemical engineering. The catalyst is prepared by the following steps: acidifying and mixing SO4<=> / ZrO2 solid superacid, high-pore-volume macroporous alumina, silica sol and a microcrystal silicon-aluminum zeolite precursor according to a dry basis mass ratio of 100:(25-30):(1-3):(3-5) to form a composite solid acid porous carrier; and loading a VIII group metal element accounting for 0.2-0.4 m% of the total dry basis of the catalyst and a rare earth element accounting for 0.1-2.0 m% of the total dry basis of the catalyst. The mass ratio of the silicon oxide to the aluminum oxide in the catalyst is 1:(9-11), and the mass ratio of the sulfur oxide to the zirconium oxide is 1:(9-11); the tetragonal phase / monoclinic phase of ZrO2 in the catalyst is greater than 70%; the catalyst has two strong acid center distribution characteristics that the Hammett acidity function Ho value pKa is less than -8.2 and the pKa is less than -11.9; the specific surface area is 120-150 m<2> / g, the pore volume is 0.1-0.4 ml / g, the pore size distribution is 5.0-6.0 nanometers, the volume phase density is 1.0-1.5 g / cm<3>, and the strength is greater than 16.0 Newton / mm; and in the C4-C7 alkane isomerization reaction, the catalyst has high activity, high selectivity and long service life.

Description

Technical field [0001] The present invention relates to an isomerization catalyst and a preparation method thereof, in particular, to a alkane isomerization catalyst containing precious metal and composite solid acid and a preparation method and application thereof, belonging to the field of petrochemical technology. Background technique [0002] During the processing of crude oil, it will accompany the production of C 4 ~ C 7 The alkane is some of the light hydrocarbon fractions of the main component. These low-carbon linear lightly alkane feedstocks generate a branched alkane by hydrogenation to increase its octane, and is an important process method in oil refining processing. [0003] With the increasing demand of environmental protection, the product quality upgrade to reduce the environmental impact, has become an important factor in the economic development. Along with the continuous acceleration of domestic gasoline upgrades and rapid development of the petrochemical indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/22B01J29/12B01J29/44B01J29/74B01J27/053B01J27/055B01J35/10B01J37/10B01J37/02B01J37/30C10G35/095C10G45/64C07C5/27C07C9/12C07C9/18C07C9/16
CPCB01J29/22B01J29/126B01J29/44B01J29/7415B01J27/053B01J27/055B01J37/10B01J37/0201B01J37/30C10G35/095C10G45/64C07C5/2781C07C5/2775B01J2229/186C10G2300/70C10G2400/02C10G2300/305C10G2300/1081B01J35/633B01J35/647B01J35/615C07C9/12C07C9/18C07C9/16
Inventor 卓润生王洪飞施宗波刘兵刘新生
Owner 润和科华催化剂上海有限公司