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Nickel base crouse vent gas hydrogenation catalysts and coprecipitation manufacturing method

A hydrogenation catalyst, Claus tail gas technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of expensive catalysts and achieve good Low-temperature catalytic activity, reduced construction and operating costs, low-cost effects

Inactive Publication Date: 2008-01-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Co(Ni)Mo / Al 2 o 3 Catalysts are more expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A nickel-based Claus tail gas hydrogenation catalyst, which consists of main active components NiO, alumina (Al 2 o 3 ) components, the mass percentage of each component is: the main active component NiO 25%, aluminum oxide 75%. See NA-1 of Table 2.

[0021] A kind of coprecipitation preparation method of nickel-based Claus tail gas hydrogenation catalyst, it comprises the steps:

[0022] 1) Dissolve a certain amount of nickel nitrate and aluminum nitrate (see NA-1 in Table 1 for the specific addition amount, 9.73 grams of nickel nitrate, and 27.58 grams of aluminum nitrate) in 250 ml of deionized water to form a mixed solution A;

[0023] 2) Prepare an aqueous solution B of polyethylene glycol with a mass concentration of 10%, wherein the molecular weight of polyethylene glycol is 2000, and set aside;

[0024] 3) Under constant stirring at 60°C, add ammonia solution and mixed solution A with a mass concentration of 10% to 250ml aqueous solution B at the same time, c...

Embodiment 2

[0030] A nickel-based Claus tail gas hydrogenation catalyst, which is composed of three components: main active component, auxiliary active component and alumina, and the mass percentage of each component is: main active component 25%, auxiliary active The composition is 3%, and the aluminum oxide is 72%. Among them, the main active component is nickel oxide, and the auxiliary active component is copper oxide.

[0031] A kind of coprecipitation preparation method of nickel-based Claus tail gas hydrogenation catalyst, it comprises the steps:

[0032] 1) Dissolve a certain amount of nickel nitrate, aluminum nitrate and auxiliary components in 250ml deionized water (see NA-2 in Table 1, 9.73 grams of nickel nitrate, 0.90 grams of copper nitrate, 26.48 grams of aluminum nitrate) in 250 ml of deionized water to prepare Mixed solution A; the auxiliary component is copper nitrate;

[0033]2) Prepare an aqueous solution B of polyethylene glycol with a mass concentration of 10%, where...

Embodiment 3

[0038] A nickel-based Claus tail gas hydrogenation catalyst, which is composed of three components: main active component, auxiliary active component and alumina, and the mass percentage of each component is: main active component 30%, auxiliary active Component 4%, alumina 66%; wherein, the main active component is nickel oxide, the auxiliary active components are chromium oxide and copper oxide, and the mass percentages of chromium oxide and copper oxide are: chromium oxide 3%, copper oxide 1 %.

[0039] A kind of coprecipitation preparation method of nickel-based Claus tail gas hydrogenation catalyst, it comprises the steps:

[0040] 1) A certain amount (see NA-3 in Table 1 for the specific addition amount, 11.68 grams of nickel nitrate, 0.30 grams of copper nitrate, 0.79 grams of chromium nitrate, 24.27 grams of aluminum nitrate) nickel nitrate, aluminum nitrate and auxiliary components were dissolved in 250ml In deionized water, mixed solution A is made, and the auxiliar...

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PUM

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Abstract

The invention relates to a hydrogenation catalyst for the tail gas of Crouse sulphur recycle device and the preparation method. A nickel pyridyl Crouse tail gas hydrogenation catalyst is characterized in that: the catalyst is mainly composed of an active component, an assistance active component and alumina three components, the quality per centage of each component is: the main active component is 20.1 to 60 per cent, the assistance active component 0 to 10 per cent, the alumina 40 to 79.9 per cent, the sum of the three components is 100 per cent; wherein, the main active component is nickel oxide, the assistance active component is one of chrome oxide, aerugo and iron oxide or a mixture of one or two in above three substances, when being a mixture of one or two in above three substances, the mixture ratio among the oxide is random. The invention has the characters of good low temperature catalyzing activity and low cost.

Description

technical field [0001] The invention relates to a hydrogenation catalyst for tail gas of a Claus sulfur recovery unit and a preparation method thereof. Background technique [0002] The recovery of sulfur from industrial waste gases such as petroleum refining, natural gas purification and coking by using the Claus process has been widely used. The Claus reaction is limited by thermodynamics and process conditions, and the sulfur recovery rate generally does not exceed 97%, so the tail gas needs to be treated before it can be discharged. One of its treatment methods is to convert the residual SO 2 Reduction to H by catalytic hydrogenation 2 After S, it is passed to the Claus device for recycling. [0003] At present, the Claus tail gas hydrogenation catalyst is generally Co(Ni)Mo / Al 2 o 3 . For example, the Japanese patent (patent No. JP06127907 A2) on May 10, 1994 disclosed a sulfur-containing Claus tail gas hydrotreating process and catalyst, in which CoMo / Al 2 o 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/70B01J23/86B01D53/50
Inventor 雷家珩方伟钱菁郭丽萍童辉
Owner WUHAN UNIV OF TECH
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