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Sulfur-proof deoxidizing agent and its preparing and use

A deoxidizer and sulfur-resistant technology, used in other chemical processes, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of difficult sulfur-resistant deoxidation, poor anti-toxicity, and complicated preparation processes

Active Publication Date: 2007-01-24
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned deoxidizers for industrial use have poor performance while those with good performance are expensive, and their anti-toxicity is very poor.
For various industrial coal raw materials containing sulfur and CO (water gas, semi-water gas, coke oven gas, etc.), the above-mentioned deoxidizers are very easy to poison, and it is difficult to carry out sulfur-resistant deoxidation
[0009] Chinese patent ZL 02135207.0 discloses a low-cost sulfur-tolerant shift deoxidizer. The deoxidizer is prepared from waste sulfur-tolerant shift catalysts. The price is low, but the activity is not high and the service life is less than one year.
Chinese patent ZL93112631.2 discloses the preparation of a molybdenum-based deoxidizer, which can be used for sulfur-resistant deoxidation in industrial shift gas, but its cost is high, the preparation process is complicated, and its service life is short, only about one year

Method used

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  • Sulfur-proof deoxidizing agent and its preparing and use

Examples

Experimental program
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Embodiment 1

[0041] Preparation of sulfur resistant deoxidizer

[0042] 8 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 3 g Co(NO 3 ) 2 ·6H 2 O, 2 grams K 2 CO 3 , mixed and added to 20 grams of water, adding mass concentration of 10% NH 3 The aqueous solution is adjusted to pH=9-12, heated and stirred to obtain an active component impregnation solution; the impregnation solution is poured into 30 grams of dried spherical γ-Al 2 o 3 Immerse in the carrier for 4 hours; dry the impregnated material at 110°C for 6 hours, and roast at 350°C for 4 hours; then activate it at 200-500°C for 20 hours in nitrogen containing 10% (volume) hydrogen; Obtain the said sulfur-resistant deoxidizer of the present invention, numbering is R-1, and its composition mass ratio is:

[0043] Carrier: γ-Al 2 o 3 , 74% (mass), deoxygenation active substance composition: 26% (mass).

[0044] The composition mass percent of deoxidizing active component is:

[0045] Mo: 45%; Co: 17%; K: 13%; O: 25%.

Embodiment 2

[0047] Preparation of sulfur resistant deoxidizer

[0048] 8 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 3 g Co(NO 3 ) 2 ·6H 2 O, 2 grams K 2 CO 3 , mixed and added to 20 grams of water, adding mass concentration of 10% NH 3 The aqueous solution is adjusted to pH=9-12, heated and stirred to obtain an active component impregnation solution; the impregnation solution is poured into 30 grams of dried spherical γ-Al 2 o 3 Carrier, impregnated for 4 hours; the impregnated material was dried at 110°C for 6 hours, and calcined at 350°C for 4 hours; 2 10% (volume), containing H 2 S 1.0% (volume), surplus is in the mixed gas of nitrogen, 200~500 ℃ activation treatment 20 hours; Can obtain said sulfur resistant deoxidizer of the present invention equally, number is R-2, and its composition mass ratio is:

[0049] Carrier: γ-Al2 o 3 , 74% (mass), deoxygenation active substance composition: 26% (mass).

[0050] The composition mass percent of deoxidizing active component is:

[0051] Mo...

Embodiment 3

[0053] Preparation of sulfur resistant deoxidizer

[0054] 6 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 4 g Ni(NO 3 ) 2 ·6H 2 O, 2 g Co(NO 3 ) 2 ·6H 2 O, 2 g Na 2 CO 3 , mixed and added to 20 grams of water, adding mass concentration of 10% NH 3 The aqueous solution is adjusted to pH=9-12, heated and stirred to obtain an active component impregnation solution; the impregnation solution is poured into 30 grams of dried spherical γ-Al 2 o 3 In the carrier, impregnated for 10 hours; the impregnated material was dried at 110°C for 8 hours, and calcined at 400°C for 8 hours; 2 10% (volume), containing H 2 S 1.0% (volume), surplus is nitrogen in the mixed gas, 200~500 ℃ activation treatment 20 hours, make the said sulfur-resistant deoxidizer of the present invention, numbering is R-3, and its composition mass ratio is:

[0055] Carrier: γ-Al 2 o 3 , 72% (mass), composition of deoxidizing active substances: 28% (mass).

[0056] The composition mass percent of deoxidizing active...

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Abstract

The present invention discloses a kind of sulfur resistant deoxidizing agent and its preparation and application. The active component of the sulfur resistant deoxidizing agent is composition comprising Mo in 10-50 wt%, Co and / or Ni, Zn, K and / or Na, O and S elements; and the carrier is spherical gamma-Al2O3. The sulfur resistant deoxidizing agent is prepared through a soaking process includes three steps of compounding homogeneous active component solution, dipping active component solution, and drying and roasting. The sulfur resistant deoxidizing agent of the present invention, after being reduced and activated, is suitable for the catalytic deoxidizing of various kind of industrial water gas, semi-water gas, coke oven gas, etc containing S and CO, and possesses the features of high heat stability, high antitoxic ability, high activity, low cost, residual oxygen amount lower than 10x10<-6>, service life of 1.5-3 years, etc.

Description

technical field [0001] The invention relates to a spherical γ-Al with molybdenum, cobalt or / and nickel, zinc, potassium or / and sodium as active metals 2 o 3 The preparation method and application of the sulfur-resistant deoxidizer as a carrier. Background technique [0002] The existing mature industrial deoxidizers in China are: [0003] 1) Iron-based deoxidizer: mainly used for food preservation, with poor deoxidation accuracy and deoxidation capacity. [0004] 2) Copper-based deoxidizer: at a temperature of 180-240°C and a space velocity of 1000-3000 hours -1 Under this condition, general hydrogen and general nitrogen can be deoxidized to 10×10 -6 , Deoxidation capacity 10ml oxygen / (gram deoxidizer). [0005] 3) Silver-based deoxidizer: Deoxidation accuracy at room temperature is 1×10 -6 , deoxygenation capacity 10 ml O 2 / (g deoxidizer). [0006] 4) Precious metal deoxidizer: Platinum palladium is used as the deoxidation active component, and the deoxidation accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J27/051
Inventor 胡典明孔渝华王先厚肖安陆钱胜涛刘华伟
Owner HAISO TECH