Weak acid process for producing dinitrotoluene

Details Weak acid process for producing dinitrotoluene Weak acid process for producing dinitrotoluene

1997-09-19

1999-05-11

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568932, C07C205/00

Patent

active

059029102

ABSTRACT:
This invention relates to an improved process for the production of dinitrotoluene wherein one is able to effectively employ a feed sulfuric acid, which is referred to as "weak acid" as the feed sulfuric acid for the nitration facility. The weak acid concentration, as feed, ranges from 86-91%, preferably 87-89% sulfuric acid by weight, to meet the total sulfuric acid requirements for the facility. This is accomplished by utilizing cocurrent processing in a mononitration zone and countercurrent nitration with respect to sulfuric acid in the dinitration zone.

REFERENCES:
patent: 2475095 (1949-07-01), Hoek
patent: 2947791 (1960-08-01), Adams
patent: 3087971 (1963-04-01), Samuelsen
patent: 3157706 (1964-11-01), Ozeki
patent: 3204000 (1965-08-01), Sammuelsen
patent: 4022844 (1977-05-01), De Cazenove et al.
patent: 4496782 (1985-01-01), Carr
patent: 5345012 (1994-09-01), Schieb et al.

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