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Desulfurization catalyst, its preparation method and use

A technology of desulfurization catalyst and iron oxide, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem of insufficient desulfurization accuracy, insufficient desulfurization accuracy of desulfurizer, and no mention of dicalcium ferrite, etc. question

Inactive Publication Date: 2007-03-21
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desulfurization precision of the desulfurizer in CN1067828A is not high enough; the sulfur capacity of the desulfurizer in CN1068356A is not large enough, and the desulfurization precision is not high enough, so it takes two steps to desulfurize to ≤1ppm
However, the patent application does not mention that dicalcium ferrite can be used as a catalyst to convert mercaptans

Method used

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  • Desulfurization catalyst, its preparation method and use
  • Desulfurization catalyst, its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (Example 1, desulfurization catalyst and preparation method)

[0034] Take Fe 2 o 3 58 grams of powder, 42 grams of CaO powder, add water, stir, knead, extrude, dry at about 100°C for about 2 hours, bake at 900°C in an oxidizing atmosphere for 3 hours, cool and immerse in water for 1 hour, take it out and dry it. Desulfurization catalyst A.

Embodiment 2

[0035] (Example 2, desulfurization catalyst and preparation method)

[0036] Take Fe 2 o 3 48 grams of powder, 50 grams of CaO powder, add water, stir, knead, extrude, dry at about 100°C for about 2 hours, bake at 1000°C in an oxidizing atmosphere for 2 hours, immerse in water for 0.5 hours after cooling, take it out and dry it. Desulfurization catalyst B.

Embodiment 3

[0037] (Example 3, desulfurization catalyst and preparation method)

[0038] Take Fe 2 o 3 61.5 grams of powder, 51 grams of CaO powder, add water, stir, knead, extrude, dry at about 100°C for about 2 hours, bake at 900°C for 3 hours in an oxidative atmosphere, immerse in water for 20 minutes after cooling, take out and dry, Obtain desulfurization catalyst C.

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Abstract

A desulfurizing catalyst (3CaO.Fe2O3.6H2O) for removing hydrogen sulfide from gas or liquid and / or transforming the thiol in gas or liquid is prepared through proportionally mixing the powdered mixture of iron oxide and / or iron hydroxide and / or iron nitrate with the powdered mixture of calcium oxide and / or calcium hydroxide and / or calcium dicarbonate and / or calcium carbonate where mole ratio of Fe-Ca is 1:1 to 1:1.5, adding water, stirring, shaping, drying, calcining at 700-1100 deg.C for 0.5-24 hr under oxidizing atmosphere to obtain iron-calcium oxide and reacting with water.

Description

technical field [0001] The invention relates to a method for removing H from gaseous materials or liquid materials. 2 A desulfurization catalyst for converting S or mercaptans and its preparation method and application, especially a high-efficiency desulfurization catalyst with hydrated calcium iron oxide as an effective active component, its preparation method and application. Background technique [0002] H contained in the process of producing chemical raw materials from coal or petroleum and in oil refining 2 S will poison and deactivate the catalyst in the subsequent section. A lot of industrial wastewater and waste gas also contain a lot of H 2 S, direct discharge will pollute the environment or cause human and animal poisoning. The materials in oil refining contain a certain amount of sulfides, including inorganic sulfides such as hydrogen sulfide and elemental sulfur, and organic sulfides such as mercaptans, among which hydrogen sulfide, mercaptans, and nascent el...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01D53/52B01D53/86
Inventor 吴志强白波刘振义
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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