Methods of recycling catalyst in oxidations of hydrocarbons

Details Methods of recycling catalyst in oxidations of hydrocarbons Methods of recycling catalyst in oxidations of hydrocarbons

1997-09-18

2000-03-21

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of liquid process material

264 3726, 2641761, 528176, 528288, 528308, 528322, 528335, 562543, C07C 5142, D01D 102, D01D 508, D01F 1300

Patent

active

060399023

ABSTRACT:
This invention relates to methods of recycling catalyst in oxidations of hydrocarbons, such as cyclohexane for example, to respective intermediate oxidation products, such as adipic acid for example, by a direct process. The catalyst remains in solution despite removal of water from the composition, since the water removal is controlled at such temperatures and such remaining water levels that prevent catalyst from precipitating. The water removal is preferably conducted before removal of the intermediate oxidation product. Also, preferably, some, and more preferably all steps of the process are conducted in a single liquid phase region.

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