Methods of removing a protective layer

摘要

A method of removing a metal protective layer from a surface of a reactor component comprising treating the metal protective layer with one or more chemical removal agents to remove at least a portion of the metal protective layer from the reactor component. A method of removing a metal protective layer from a surface of a reactor component comprising treating the metal protective layer to remove the metal protective layer from the reactor component, and determining a thickness of the reactor component following treatment.

主权项

1. A method of removing a first metal protective layer from a surface of a component of a catalytic reforming reactor comprising:
converting at least a portion of a hydrocarbon feed stream to provide aromatic hydrocarbons by contacting the hydrocarbon feed stream with a first reforming catalyst in the catalytic reforming reactor, wherein the hydrocarbon feed and the aromatic hydrocarbons contact the first metal protective layer; removing the first reforming catalyst from the catalytic reforming reactor; treating the first metal protective layer of the component of the catalytic reforming reactor with a mechanical removal agent to remove at least a portion of the first metal protective layer from the surface of the component of the catalytic reforming reactor; heating the component of the catalytic reforming reactor to a temperature from about 120° F. to about 2,000° F. for from about 1 hour to about 500 hours following application of the mechanical removal agent; after heating the component, treating the first metal protective layer with one or more chemical removal agents in an amount of from about 0.1 ppm to about 50,000 ppm to remove a remaining portion of the first metal protective layer from the reactor component at a temperature from about 200° F. to about 1,600° F. for from about 1 hour to about 500 hours; and loading the catalytic reforming reactor with a second reforming catalyst comprising a zeolitic reforming catalyst or a bimetallic reforming catalyst, wherein the first metal protective layer comprises stannides.