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Preparation method of C10-C13 long-chain normal paraffin hydrocarbon dehydrogenation catalyst supporter

A C10-C13, catalyst carrier technology, applied in the direction of catalyst carrier, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc.

Inactive Publication Date: 2013-04-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the development and replacement process of long-chain alkane dehydrogenation catalysts, it can be seen that domestic and foreign scientific research institutions and users have been researching and updating to tap the potential of catalysts, but only from the catalyst-supported components and the loading method of catalyst active components. , and the carrier selection is only limited to various alumina as carriers for research

Method used

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  • Preparation method of C10-C13 long-chain normal paraffin hydrocarbon dehydrogenation catalyst supporter
  • Preparation method of C10-C13 long-chain normal paraffin hydrocarbon dehydrogenation catalyst supporter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: MgAl 2 O 4 Preparation of the vector

[0022] Weigh Al(NO 3 ) 3 ·9H 2 O 187.5g1 and Mg(NO 3 ) 2 ·6H 2 O 64.1g is dissolved in 1L water, the temperature of the solution is controlled by a water bath at 40°C, then the concentrated ammonia solution is added dropwise to the solution and vigorously stirred (stirring speed 350r / min), until the pH of the solution reaches 10, the dropwise addition of ammonia water is stopped, and the stirring is stable for 60 minutes , the stirring solution was stopped at 40 °C for 1 h and then filtered. Washed with an equal volume of deionized water, the filtered colloid was extruded into strips, dried at a constant temperature, and then placed in an oven at 105 °C for 12 hours. The dried solid was heated in a muffle furnace at a heating rate of 1-20 / min. After reaching 600°C, the corresponding carrier was prepared by constant temperature calcination for 4 hours.

Embodiment 2

[0023] Example 2: Preparation of support for magnesium-aluminum composite

[0024] Weigh Al(NO 3 ) 3 ·9H 2 O 220.0g and Mg(NO 3 ) 2 ·6H 2 O 40.0g is dissolved in 1L water, the temperature of the solution is controlled by a water bath at 40°C, then the concentrated ammonia solution is added dropwise to the solution and vigorously stirred (stirring speed 350r / min), until the pH of the solution reaches 10, stop dripping ammonia water, and stir to stabilize for 60 minutes , the stirring solution was stopped at 40 °C for 1 h and then filtered. Washed with an equal volume of deionized water, the filtered colloid was extruded into strips, dried at a constant temperature, and then placed in an oven at 105 °C for 12 hours. The dried solid was heated in a muffle furnace at a heating rate of 1-20 / min. After reaching 600°C, the corresponding carrier was prepared by constant temperature calcination for 4 hours.

Embodiment 3

[0025] Example 3: Preparation of Alumina Support

[0026] Weigh Al(NO 3 ) 3 ·9H 2 O 250.0g was dissolved in 1L water, the temperature of the solution was controlled by a water bath at 40°C, then the concentrated ammonia solution was added dropwise to the solution and vigorously stirred (stirring speed 350r / min), until the pH of the solution reached 10, the dropwise addition of ammonia was stopped, and the stirring was stable for 60 minutes , the stirring solution was stopped at 40 °C for 1 h and then filtered. Washed with an equal volume of deionized water, the filtered colloid was extruded into strips, dried at a constant temperature, and then placed in an oven at 105 °C for 12 hours. The dried solid was heated in a muffle furnace at a heating rate of 1-20 / min. After reaching 600°C, the corresponding carrier was prepared by constant temperature calcination for 4 hours.

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Abstract

The invention relates to a supporter for a C10-C13 long-chain normal paraffin hydrocarbon dehydrogenation catalyst, which is prepared by a co-impregnation preparation method by using ammonia water as a precipitating agent. The supporter is a magnesium aluminum oxide composite. The catalyst prepared from the supporter by a vacuum impregnation method comprises the following active components: 0.2-0.5% of Pt and 0.4-4.0% of Sn. The catalyst is mainly used for preparing monoolefines by dehydrogenating C10-C13 long-chain normal paraffin hydrocarbons. Compared with the catalyst prepared from the aluminum oxide supporter by the same method, the catalyst prepared from the magnesium aluminum oxide composite supporter has obviously higher reaction activity and stability; and compared with the commercial catalyst NDC-8, the catalyst prepared from the magnesium aluminum oxide composite supporter also has higher activity and stability.

Description

technical field [0001] The present invention relates to a 10 -C 13 A preparation method of a long-chain n-alkane dehydrogenation catalyst carrier. This carrier is mainly used for long-chain alkanes (C 10 -C 13 ) in the process of preparing linear monoolefin catalyst by dehydrogenation. Background technique [0002] The dehydrogenation of long-chain alkanes to prepare linear monoolefins and the synthesis of linear alkyl benzene sulfonates are important synthetic detergent raw materials. Linear alkyl benzene sulfonates were first developed by UOP in the 1960s based on Pt Synthetic production of catalysts by catalytic long-chain alkane dehydrogenation process. In recent years, a lot of research has been done on improving the dehydrogenation reaction performance of catalysts, and great progress has been made. At present, the widely used long-chain alkane dehydrogenation catalysts are mostly Pt-Sn bimetallic catalysts, and the carrier is mostly alumina. Due to the existence...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/62C07C11/02C07C5/333
Inventor 孙承林赖玉龙何松波杨旭荣欣罗沙其他发明人请求不公开姓名
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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