Method to activate a catalyst for a continuous process for the preparation of phenol from benzene in a fixed bed reactor
US8563461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Aug 26, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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:xTiO2.(1−x)SiO2
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.