Method to activate a catalyst for a continuous process for the preparation of phenol from benzene in a fixed bed reactor
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United States of America Patent
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Oct 22, 2013
Grant Date -
Jul 22, 2010
app pub date -
Mar 17, 2010
filing date -
Nov 12, 2004
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Abstract
A process to activate a titanium silicalite catalyst for the oxidation of benzene to phenol is provided. The catalyst is activated in the reactor for the oxidation by feeding to a reactor containing the titanium silicalite catalyst, during a time of from 2 to 6 hours, at a temperature ranging from 20 to 120° C., an aqueous solution of ammonium acid fluoride in a concentration ranging from 0.1% to 1% by weight; and hydrogen peroxide in a concentration ranging from 3% to 10% by weight; feeding water to the reactor at the end of the reaction; and drying or calcining the catalyst contained in the reactor to obtain the activated catalyst. The catalyst is represented by the formula:
- whereinx is from 0.0001 to 0.04.
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