Patents

3186.  --------.  Revivification of Catalyst.  British Patent (Provisional) 33,814, filed 1936.

High-boiling hydrocarbons deposited on the catalyst are removed with H₂, steam, or solvent.  The revivification is carried out in situ and at temperatures not higher than the normal reaction temperature.  The use of the fraction of the product boiling 130º-140º is recommended as the solvent, the extraction being carried out at 110º.  By these means the catalyst life may be extended greatly beyond the usual 1 or 2 mo.