Preparation method of medium temperature ferric oxide desulfurizer

An iron oxide desulfurizer, medium temperature technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of many process steps, cumbersome operation, time-consuming, etc., and achieve simple process, good desulfurization effect and low production cost low effect

Active Publication Date: 2009-12-02
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 process first prepares γ-FeOOH through liquid phase reaction, and γ-FeOOH is heated to obtain γ-Fe through a certain temperature program. 2 o 3 , and then add a certain amount of structural additives and modulating additives, kneading, extruding, drying and other processes to obtain the medium and low temperature high-activity molding desulfurizer, so this process has many process steps, Disadvantages of time-consuming and cumbersome operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: with 150 gram ferrous sulfate heptahydrate (purity 83.9%), 40 gram calcium hydroxide (purity 88%), 10 gram attapulgite, 2 gram graphite, mix, knead, extrude, dry, Roasted at 400°C for 2 hours to obtain a strip-shaped product with a diameter of 4mm, a lateral compressive strength of 87N / cm, and a bulk specific gravity of 0.71Kg / L.

Embodiment 2

[0014] Embodiment 2: 143 grams of ferrous sulfate heptahydrate (purity 83.9%), 40 grams of calcium hydroxide (purity 88%), 9.5 grams of attapulgite were mixed, kneaded, extruded, dried, and roasted at 400 ° C for 2 hours The finished product has a lateral compressive strength of 76N / cm and a bulk specific gravity of 0.85Kg / L. .

Embodiment 3

[0015] Embodiment 3: 200 grams of ferrous sulfate heptahydrate (purity 88.3%) are mixed with 63.2 grams of calcium hydroxide (purity 89.3%), add 100 grams of water (calcium: iron=1.2: 1), knead, and air dry , add 12 grams of attapulgite and an appropriate amount of water, knead, extrude, dry, and roast at 400°C for 2 hours to obtain a finished product with a lateral compressive strength of 42N / cm and a bulk specific gravity of 0.82Kg / L.

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PUM

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Abstract

The invention provides a preparation method of a medium temperature ferric oxide desulfurizer, and the active component of the medium temperature ferric oxide desulfurizer is amorphous ferric oxide of high activity. The preparation method of the medium temperature ferric oxide desulfurizer comprises the steps of directly kneading soluble ferrite, calcium hydroxide and a binder, extruding, drying and roasting. The desulfurizer obtained by using the preparation method of the invention has high content of ferric oxide, high sulphur capacity and good desulfurizing property; in addition, the preparation method of the invention has the advantages of simple process, low cost and suitability for industrialized mass production. The desulfurizer of the invention is mainly used for medium temperature desulfurization of hydrogen sulfide in chemical fertilizer industry synthesis gas.

Description

technical field [0001] The invention relates to a method for preparing a medium-temperature iron oxide desulfurizer, belonging to the fields of gas purification and desulfurizer preparation. Background technique [0002] Zinc oxide desulfurizer is widely used in synthetic ammonia, hydrogen production, coal chemical industry, petroleum refining and other industries. The disadvantage of being expensive. [0003] In recent years, the research on iron oxide as a medium temperature desulfurizer has gradually increased. For example, in the Chinese patent document CN1183996C, an iron oxide composite desulfurizer and its preparation method are disclosed. The desulfurizer is composed of iron oxide, zinc oxide and special additives. , the preparation method is to neutralize and precipitate ferrous sulfate solution and ammonium bicarbonate solution to obtain insoluble iron salt; iron salt, zinc salt and special additives are pressed into tablets to obtain the desulfurizer. This proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/48
Inventor 刘凤仁刘振义喻永生
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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