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A macroporous alumina-based catalyst suitable for pressurized sulfur recovery process and its preparation method

A macroporous alumina and catalyst technology, applied in the direction of sulfur preparation/purification, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problems of deactivation and blocked pores, and achieve Effects of long service life, enlarged pore size, and good Claus reactivity

Active Publication Date: 2021-03-30
青岛联信催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the specific surface area of ​​ordinary alumina catalyst is about 250m 2 / g, the pore volume is about 0.4cm 3 / g, but its average pore size is only about 5-10nm. The pore size of the catalyst is relatively small. Under pressurized conditions, sulfur vapor will condense in the pores of the catalyst and block the pores or even deactivate them. Therefore, it is necessary to develop a macroporous oxidation catalyst. Aluminum-based sulfur recovery catalyst is necessary

Method used

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  • A macroporous alumina-based catalyst suitable for pressurized sulfur recovery process and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Weigh pseudo-boehmite 100g, magnesium aluminum spinel (MgAl 2 o 4 ) powder 10g, squat powder 5g, and starch 5g were uniformly mixed, mixed with 3% nitric acid solution, rolled into balls, and calcined at 550°C for 3h to obtain a catalyst. The catalyst number was Q-1. The chemical composition of the catalyst is: Al 2 o 3 87.5%, MgAl 2 o 4 12.5%, the strength, specific surface area and average pore diameter data of the catalyst are shown in Table 1, and the activity evaluation is shown in Table 2.

Embodiment 2

[0018] Weigh pseudo-boehmite 100g, MgAl 2 o 4 Mix 20g of powder, 10g of turnip powder, and 10g of cellulose evenly, mix with 3% nitric acid solution, roll into balls, and roast at 550°C for 3h to prepare the catalyst. The catalyst number is Q-2. The chemical composition of the catalyst is: Al 2 o 3 77.8%, MgAl 2 o 4 22.2%, the strength, specific surface area and average pore diameter data of the catalyst are shown in Table 1, and the activity evaluation is shown in Table 2.

Embodiment 3

[0020] Weigh pseudo-boehmite 100g, MgAl 2 o 4 Powder 5g, γ-Al 2 o 3 Mix 10 g and 10 g of scallop powder evenly, mix with 3% nitric acid solution + 5% polyvinyl alcohol aqueous solution, roll into a ball, and roast at 550°C for 3 hours to obtain a catalyst. The catalyst number is Q-3. The chemical composition of the catalyst is: Al 2 o 3 94.1%, MgAl 2 o 4 5.9%, the strength, specific surface area, average pore diameter and other data of the catalyst are shown in Table 1, and the activity evaluation is shown in Table 2.

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Abstract

The invention provides a macroporous alumina-based sulfur recovery catalyst suitable for pressurized sulfur recovery processes and a preparation method. The catalyst uses an inorganic pore-forming agent to increase the macropore fraction of the catalyst, so that the catalyst not only has a large average pore diameter, It has the characteristics of reasonable pore size distribution and good structural stability, and avoids the condensation of sulfur vapor in the catalyst pores, which may lead to pore blockage or even deactivation. It also has high Claus reaction activity, strong organic sulfur hydrolysis performance and long service life. It is especially suitable for Pressurized sulfur recovery process.

Description

technical field [0001] The invention relates to a catalyst for a pressurized sulfur recovery process and a preparation method thereof, in particular to a macroporous alumina-based sulfur recovery catalyst and a preparation method thereof. Background technique [0002] At present, the domestic sulfur recovery and tail gas treatment technology mainly adopts the Claus sulfur recovery process of high temperature thermal reaction and two-stage catalytic reaction. The operating pressure of this process is extremely low, about 10-60kPa, and the pressure drop of the whole device is 40 ~50kPa, most of them are filled with common alumina catalysts. With the continuous development of sulfur recovery technology, in the coal chemical process sulfur recovery device, the pressurized sulfur recovery technology makes full use of the 90-120kPa acid gas pressure provided by the upstream, without decompression process, directly under higher pressure Carrying out the Claus reaction has the adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/10B01J21/04B01J35/10C01B17/04
CPCC01B17/0426B01J21/04B01J23/04B01J35/615B01J35/647Y02P20/584
Inventor 高明月纵秋云高辉张晋王晓红孙波袁洪娟
Owner 青岛联信催化材料有限公司
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