Alumina carrier hydrogenation catalyst regeneration utilization method

Abstract

The present invention discloses an alumina carrier hydrogenation catalyst regeneration utilization method, which comprises: screening a failure catalyst through a vibration sieve to remove unwanted carbon powder and ceramic balls so as to separate a spent catalyst; conveying the spent catalyst into a mesh belt moving bed type flame separation tunnel regeneration furnace using natural gas as a fuel, continuously heating through different temperature sections, cooling, and discharging the material to obtain a regeneration catalyst primary product, wherein the thickness of the material layer is 35-40 mm, and the mesh belt speed is 4 m / h; and screening the regeneration catalyst primary product through the vibration sieve to remove the carbon powder and the ceramic balls to obtain the qualified regeneration catalyst. According to the present invention, by controlling the moving speed of the material layer in the furnace, the charring quality can be ensured, the strength, the specific surface area and the pore capacity of the failure catalyst can be recovered, the activity and the stability of the catalyst can be well recovered, the regeneration catalyst activity recovery rate can achieve more than 90% of the activity of the new catalyst, and the practical value is provided.

Description

technical field [0001] The invention belongs to the technical field of application of hydrogenation catalysts, and relates to a method for regeneration and utilization of alumina carrier hydrogenation catalysts. Background technique [0002] The petroleum and chemical industry is one of the most basic and largest three pillar industries in contemporary society, and it is closely related to the energy and material industries. The development of the petrochemical industry is inseparable from catalysts. If catalysts are not used for many important petrochemical processes, the chemical reaction speed is very slow, or industrial production cannot be carried out at all. It is estimated that more than 80% of the production in the modern fuel industry and chemical industry uses catalytic processes. From 1985 to 1995, the annual consumption of catalysts increased from 84,000 tons to 306,000 tons, showing a rapid upward trend, and among the newly developed products, the proportion of...

AI Technical Summary

Problems solved by technology

In the past, most hydrogenation catalysts in my country used this regeneration method, but there are four fatal shortcomings in this regeneration: (1) The regeneration gas will cause corrosion to the equipment of the reaction system

To alleviate this corrosion, either increase the material requirements, or pre-sulfurize the regenerated catalyst, build a vulcanization facility that will only be used for 1-3 years, and increase the investment in the device

(2) Loss of catalyst activity

In the reactor, especially when regenerating in a large-scale reactor, the temperature distribution of the catalyst bed is uneven, and it is easy to locally overheat, resulting in the loss of catalyst activity

(3) pollute the environment

A large amount of gas is generated during regeneration in the device. These gases are extremely difficult to collect and process, and are often discharged into the atmosphere, causing environmental pollution.

(4) Unplanned downtime loss

When regenerating in the reactor, it often takes up the start-up production time, thus affecting the normal economic benefits of the plant

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