Recovery of phenol, acetone and dimethyl phenyl carbinol from cu

Details Recovery of phenol, acetone and dimethyl phenyl carbinol from cu Recovery of phenol, acetone and dimethyl phenyl carbinol from cu

1971-05-03

1977-04-05

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 3708

Patent

active

040162133

ABSTRACT:
In the process for obtaining phenol and acetone from cumene hydroperoxide which has been obtained by liquid-phase oxidation of cumene with molecular oxygen, dehydration of by-product dimethyl phenyl carbinol to form alpha-methylstyrene and formation of higher boiling by-products, such as alpha-methylstyrene dimers and cumyl phenol, are substantially reduced by an improvement which comprises, in combination: decomposing the cumene hydroperoxide at temperatures in the range of from 65.degree. to 105.degree. C. using as decomposition catalyst sulfur dioxide or sulfuric acid in amount of between 0.002 and 0.02 percent by weight of the cumene hydroperoxide feed, conducting the decomposition in the absence of added water in a decomposition mixture containing not more than about 0.5 percent by weight of water, and withdrawing decomposition product at cumene hydroperoxide concentrations not exceeding about 0.5 percent by weight to obtain a decomposition product containing principally phenol and acetone, then adding a base to the decomposition product in excess of amount required to neutralize the decomposition catalyst and sufficient to adjust the pH of the product to from about 5 to about 9, followed by fractional distillation to separate the decomposition product into an acetone fraction, a phenol fraction and one or more by-product fractions, so that dehydration of dimethyl phenyl carbinol and formation of higher boiling reaction products of alpha-methylstyrene are substantially avoided during the decomposition and fractional distillation steps.

REFERENCES:
patent: 2626281 (1953-01-01), Joris
patent: 2663735 (1953-12-01), Filar et al.
patent: 2683751 (1954-07-01), Filar
patent: 2993074 (1961-07-01), Shepard

Affiliated with

Also associated with

Rating

Recovery of phenol, acetone and dimethyl phenyl carbinol from cu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recovery of phenol, acetone and dimethyl phenyl carbinol from cu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of phenol, acetone and dimethyl phenyl carbinol from cu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2265990