Phenol tar processing method
AssigneeGeneral Electric Company
InventorsArkady S. Dyckman, Vadim P. Boyarsky, Alexander S. Malinovskii, Yurii I. Petrov, Leontii M. Krasnov, Andrey V. Zinenkov, Boris I. Gorovits, Sergey N. Chernukhim, Anatoly D. Sorokin, John W. Fulmer
Life of this patent
Estimating the term…
Abstract
Valuable products are recovered from phenol tar by thermocracking under controlled conditions in the presence of polyphosphoric acid. Bisphenol A tars can be optionally cracked under these conditions mixed with the phenol tar and enhanced yields obtained.
Claims10
A method for recovery of valuable products from phenol tar, obtained from a phenol and acetone manufacturing process, comprising charging a phenol tar into a thermocracking process column-type reactor, heating the bottoms of the reactor to a temperature of from 200.degree. C. to 360.degree. C., maintaining the reactor at a pressure of from 0.1 to 5 atmospheres absolute and cracking the tar in the presence of 0.1 to 1.0 weight percent of phosphoric acid preferably 0.1-0.2 wt %, preheated to 50.degree. C.-180.degree. C., with such phosphoric acid being added whereby it dehydrates and polymerizes to its non-volatile polyphosphoric acid analogs.
A method for recovery of valuable products from phenol tar, obtained from a phenol and acetone manufacturing process, comprising charging a phenol tar into a thermocracking process column-type reactor, heating the bottoms of the reactor to a temperature of from about 300.degree. C. to about 330.degree. C., maintaining the reactor at a pressure of from 0.1 to about 3.0 atmospheres absolute and cracking the tar in the presence of 0.1 to about 0.2 weight percent of phosphoric acid preheated to 50.degree. C. to 180.degree. C., with such phosphoric acid being added whereby it dehydrates and polymerizes to its non-volatile polyphosphoric acid analogs.
Dependencies are inferred from the claim text.