Recycling method for waste CO sulfur-tolerant shift catalysts

A waste catalyst, sulfur-resistant shift technology, used in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of narrow active temperature range, very sensitive poisons, insufficient purity, etc., and achieve no secondary pollution. , the effect of saving molybdenum resources and improving sulfur resistance

Active Publication Date: 2015-02-18
湖北双雄催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More than 70 years ago, Fe-Cr series high-temperature shift catalyst was first used, and then Cu-Zn series low-temperature shift catalyst was developed. The disadvantage of being very sensitive to poisonous substances
By-product Al(OH) 3 The purity is not enough, the use value is not big
The by-product potassium

Method used

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  • Recycling method for waste CO sulfur-tolerant shift catalysts

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] A waste CO sulfur-tolerant shift catalyst, by X-ray fluorescence analysis, its composition is mass fraction (%): Co (calculated as CoO): 3.8%, Mo (calculated as MoO) 3 Total): 11.5%, K 2 O: 1.5%, S (in SO 2 Total): 14.1%, Al 2 O 3 : 69.1%. Crush the spent catalyst to 100 mesh, take 18kg of crushed spent catalyst, and 200kg Fe(OH) 3 (In Fe 2 O 3 Total mass fraction≥70%), 18kgCr(OH) 3 (In Cr 2 O 3 (Calculated mass fraction ≥ 61%)) milled together for 1 to 2 hours and then passed through an 8-mesh screen to make particles, calcined at a low temperature of 250°C to 300°C for 6 to 8 hours, cooled and then mixed with graphite to form a tablet to obtain a CO high temperature shift catalyst . Detected according to the national chemical industry standard HG / T 3546-2011, activity (calculated as carbon monoxide conversion rate): 61%; average particle radial crush resistance: 365N / cm; particle fraction below 160N / cm: 5% ; Abrasion rate: 3.2%; mass fraction of loss ...

Example Embodiment

[0020] Example 2

[0021] A waste CO sulfur tolerant shift catalyst, after X-ray fluorescence analysis, its composition is mass fraction (%): Co (calculated as CoO): 2.6%, Mo (calculated as MoO) 3 Total): 9.8%, K 2 O: 2.0%, S (in SO 2 Total): 11.7%, Al 2 O 3 : 73.9%. Crush the spent catalyst to 120 mesh, take 20kg of crushed spent catalyst, and 200kg Fe(OH) 3 (In Fe 2 O 3 Total mass fraction≥70%), 18kgCr(OH) 3 (In Cr 2 O 3 (Calculated mass fraction ≥ 61%)) milled together for 1 to 2 hours and then passed through an 8-mesh screen to make particles, calcined at a low temperature of 250°C to 300°C for 6 to 8 hours, cooled and then mixed with graphite to form a tablet to obtain a CO high temperature shift catalyst . Detected according to the national chemical industry standard HG / T 3546-2011, activity (calculated as carbon monoxide conversion rate): 62%; average particle radial crush resistance: 352N / cm; particle fraction below 160N / cm: 0% ; Abrasion rate: 3.0%; mass fraction of los...

Example Embodiment

[0022] Example 3

[0023] A waste CO sulfur tolerant shift catalyst, after X-ray fluorescence analysis, its composition is mass fraction (%): Co (calculated as CoO): 1.5%, Mo (calculated as MoO) 3 Total): 8.6%, K 2 O: 4.8%, S (in SO 2 Total): 9.2%, Al 2 O 3 : 75.9%. Crush the spent catalyst to 120 mesh, take 22kg of crushed spent catalyst, and 200kg Fe(OH) 3 (In Fe 2 O 3 Total mass fraction≥70%), 18kgCr(OH) 3 (In Cr 2 O 3 (Calculated mass fraction ≥ 61%)) milled together for 1 to 2 hours and then passed through an 8-mesh screen to make particles, calcined at a low temperature of 250°C to 300°C for 6 to 8 hours, cooled and then mixed with graphite to form a tablet to obtain a CO high temperature shift catalyst . Detected according to the national chemical industry standard HG / T 3546-2011, activity (calculated as carbon monoxide conversion rate): 60%; average particle radial crush resistance: 382N / cm; particle fraction below 160N / cm: 0% ; Abrasion rate: 2.8%; mass fraction of loss...

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Abstract

The invention relates to a recycling method for waste CO sulfur-tolerant shift catalysts. The recycling method comprises the following steps: crushing the waste CO sulfur-tolerant shift catalysts, milling the crushed waste CO sulfur-tolerant shift catalysts, Fe(OH)3 and Cr(OH)3 together for 1-2 hours to be made into particles through a 8-mesh screen cloth, roasting the particles for 6-8 hours at the low temperature of 250-300 DEG C, cooling the roasted particles, and then tabletting and shaping the cooled particles to obtain CO high-temperature shift catalysts. Through detection according to the national chemical industry standard HG/T 3546-2011, all the performance indexes are much higher than quality technology requirements of B116 type CO high-temperature shift catalysts which are sold in the market. Through the adoption of the recycling method, the resource utilization rate of the waste CO sulfur-tolerant shift catalysts reaches 100%, sulfur in waste catalysts does not need to be removed, SO2 waste gas, NO waste gas and NO2 waste gas are not generated in the whole recovery process, and waste liquid and waste residues are not generated, so that the purposes of zero secondary pollution and zero new 'three wastes' are really realized, and not only are molybdenum sources saved, but also the recycling method is environmental-friendly.

Description

technical field [0001] The invention relates to a method for recycling a waste CO sulfur-tolerant shift catalyst, belonging to the technical field of catalysts. Background technique [0002] CO sulfur-tolerant shift catalyst is an important catalyst for hydrogen production in ammonia, methanol and other industries. More than 70 years ago, Fe-Cr series high-temperature shift catalyst was first used, and then Cu-Zn series low-temperature shift catalyst was developed. Such as the shortcomings of being very sensitive to poisons. In order to solve these problems, Co-Mo series wide-temperature sulfur-tolerant shift catalysts have been developed. [0003] When using heavy oil, residual oil or coal as raw material to produce synthetic ammonia raw material gas, the use of Co-Mo series wide temperature shift catalyst can directly transform the sulfur-containing gas, and then undergo desulfurization and decarbonization, simplifying the process and significantly reducing energy consum...

Claims

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Application Information

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IPC IPC(8): B01J27/049B01J35/02C01B3/16
CPCY02P20/52
Inventor 周志斌黄远军肖辉亚程瑞徐晓毅
Owner 湖北双雄催化剂有限公司
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