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Method for recycling and reusing waste hydrocracking catalyst

A hydrocracking and catalyst technology, applied in catalyst regeneration/reactivation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low recycling rate, high pollution, etc., and achieve simple process, environmental protection and recycling Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high pollution and low recycling rate in the treatment process of conventional waste hydrocracking catalysts, the present invention provides a method for efficient recycling of waste hydrocracking catalysts

Method used

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  • Method for recycling and reusing waste hydrocracking catalyst
  • Method for recycling and reusing waste hydrocracking catalyst
  • Method for recycling and reusing waste hydrocracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take the FC-12 flexible hydrocracking catalyst (regenerated twice, with a total service life of 9 years) that has completed the service life of the industry, grind it into powder, and sieve it with a 200-mesh standard sieve. Then the catalyst powder was placed in a muffle furnace, and a nitrogen-oxygen mixture with an oxygen content of 2.0% was passed into the muffle furnace, and calcined at 460°C for 6h. Put 200g of roasted powder into an alkaline buffer solution of sodium carbonate and sodium hydroxide with a pH value of 12 for beating, the solid-to-liquid ratio is 1:4, the beating temperature is 75°C, the time is 60min, the solid-liquid separation is carried out, and the filter is washed with 70°C distilled water. Cake until neutral, and dry at 120°C for 6 hours; put 400g of the above dry powder into a roller compactor, add 4g / 100mL dilute nitric acid solution, and scallop powder, etc., and grind it into a paste shape, extruding it into a shape with a diameter of 1.5 ...

Embodiment 2

[0023] The buffer solution of example 1 is replaced by ammonium nitrate and ammoniacal liquor, the pH value is adjusted to 11.0, the solid-to-liquid ratio is 1:6, and the modified Y-1 molecular sieve (unit cell constant 24.40, crystallinity 90%) is added in the rolling process ), 28.0g tungstic acid and 20.0g nickel nitrate, other preparation methods are the same as in Example 1, and the obtained catalyst number is RFC12-2.

Embodiment 3

[0025] Replace the one in Example 1 with high and medium-sized industrial waste catalyst D-39, replace the buffer solution with ammonium carbonate and ammonia water, adjust the pH value to 12.0, the solid-to-liquid ratio is 1:5, the beating temperature is 65°C, the beating time is 120min, and the rolling process Add 16.0g of modified Y-2 molecular sieve (unit cell constant 24.30, crystallinity 95%), 28.0g tungstic acid and 20.0g nickel nitrate, other preparation methods are the same as in Example 1, and the catalyst number is RD39-1.

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Abstract

The invention discloses a method for recycling and reusing a waste hydrocracking catalyst. The method comprises the following steps: (1) grinding the waste hydrocracking catalyst to screen, and roasting the powder for 1-8 h under the conditions that the oxygen volume content is 1-5% and the temperature is 300-600 DEG C; (2) adding the roasted powder in the step (1) into an alkaline buffer solution with the pH value of 10-14 according to a solid-to-liquid ratio of (1: 2) to (1: 10) to realize pulping at 40-80 DEG C for 30-240 min, carrying out solid-liquid separation after the pulping, and washing the filter cake to be neutral by distilled water; (3) taking the filter cake obtained in the step (2) as a raw material, and carrying out forming, drying and roasting to prepare the finished product of the hydrocracking catalyst. The method is simple in process; no high-pollution raw materials or a high-energy consumption treatment process is used, so that the green and environment-friendly recycle of the hydrocracking catalyst is realized and the requirements of the further social development are met.

Description

technical field [0001] The invention relates to a recovery and reuse method of a waste hydrocracking catalyst, in particular to re-preparing a catalyst after a waste hydrocracking catalyst powder is treated with lye, realizing the recovery and utilization of all components of the waste hydrocracking catalyst. technical background [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil used for steam cracking ethylene raw materials, it has become one of the most important heavy oil deep processing techniques in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. One of the keys o...

Claims

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Application Information

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IPC IPC(8): B01J38/64B01J38/66B01J29/90B01J29/16C10G47/20
Inventor 杜艳泽刘昶张晓萍
Owner CHINA PETROLEUM & CHEM CORP
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