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Method for recycling molybdenum of molybdenum-contained waste catalyst

A waste catalyst and ammonium molybdate technology, applied in the direction of improving process efficiency, etc., can solve the problems of low molybdenum recovery rate, high treatment cost, complicated process, etc., and achieve the effect of low raw material price, simple equipment and simple process

Active Publication Date: 2010-06-09
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods described above are very complicated
[0005] In the existing molybdenum-containing waste catalyst recovery technology, there are deficiencies such as low molybdenum recovery rate or low molybdenum purity. In order to achieve high product quality, some processes need to use ion exchange or extraction process, which makes the process very cumbersome and the treatment cost is relatively high. high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] FDS-4 waste hydrogenation catalyst (FDS-4 is a distillate hydrodesulfurization catalyst developed and produced by Fushun Petrochemical Research Institute) 100g was roasted at 400°C for 3 hours, and then crushed to 120 mesh after cooling. Obtained 81.6g, the content of molybdenum and cobalt (based on oxide weight) was analyzed to be 15.4% and 4.8%, respectively. Mixed with alkaline substances, the weight ratio of sodium carbonate to spent catalyst is 1:1 (about 81g in weight), and the weight ratio of sodium bicarbonate to spent catalyst is 0.5:1 (about 41g in weight). The mixed powders were pulverized and calcined at 700° C. for 8 hours, and the weight of the powders after cooling was 216.9 g. The volume of the mixed acid solution prepared is 2169mL, wherein the concentration of sulfuric acid is 10%, the concentration of nitric acid is 2%, and the concentration of citric acid is 1%. Heat the mixed acidic solution to 80°C, add the roasted mixed powder, stir and impregnat...

Embodiment 2

[0029] 100 g of the spent hydrogenation catalyst FDS-4 was roasted at 450° C. for 3 hours, and then pulverized to 120 mesh after cooling. Obtained 79.6g, the content of molybdenum and cobalt (based on oxide weight) was analyzed to be 16.1% and 5.3%, respectively. Mixed with alkaline substances, the weight ratio of sodium carbonate to spent catalyst is 2:1 (about 160g in weight), and the weight ratio of sodium bicarbonate to spent catalyst is 0.1:1 (about 8g in weight). The mixed powders were pulverized and calcined at 750° C. for 7 hours, and the weight of the powders after cooling was 205.6 g. The volume of the mixed acid solution prepared is 1028mL, wherein the concentration of sulfuric acid is 30%, the concentration of nitric acid is 3%, and the concentration of citric acid is 3%. Heat the acidic solution to 95°C, add the calcined powder, stir and impregnate for 1.5h. After cooling down, add ammonia water to adjust the pH value to 1.5 to precipitate ammonium molybdate cry...

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Abstract

The invention relates to a method for recycling molybdenum of a molybdenum-contained waste catalyst, which comprises the following steps of: roasting and pulverizing the molybdenum-contained waste catalyst; then mixing and roasting with an alkaline substance; extracting by using mixed acid; depositing by using an alkaline solution; depositing the molybdenum in an ammonium molybdate way; further dissolving the ammonium molybdate by using ammonia water and readjusting the pH value to obtain an ammonium molybdate sediment; and drying to obtain the ammonium molybdate product. The method is particularly suitable for the process of extracting high-purity ammonium molybdate by using a aluminium-based molybdenum-contained waste catalyst, and has simple process, high maneuverability, low energy consumption and stable quality of the prepared product.

Description

technical field [0001] The invention relates to a method for recycling molybdenum-containing compounds from molybdenum-containing waste catalysts, in particular to a method for recycling molybdenum from molybdenum-cobalt waste catalysts. technical background [0002] With the development of industry, the human demand for petroleum and petrochemical products is increasing, and the amount of catalysts used to produce various products is also increasing, especially the amount of molybdenum-containing catalysts is increasing, such as the processing of various petroleum products. Molybdenum-containing catalysts are widely used in hydrogen processes. At the same time, there is a relative shortage of molybdenum metal resources, but there is also a large demand in the fields of national defense and steel. Therefore, the recovery and treatment of molybdenum in spent catalysts, the rational reuse of resources, and the reduction of environmental pollution caused by spent catalysts hav...

Claims

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Application Information

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IPC IPC(8): C22B34/34C22B3/06C22B7/00
CPCY02P10/20
Inventor 陈光高玉兰李崇慧徐黎明
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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