Reducing 2,4-dinitroortho-cresol in effluent stream from dinitro

Details Reducing 2,4-dinitroortho-cresol in effluent stream from dinitro Reducing 2,4-dinitroortho-cresol in effluent stream from dinitro

1983-09-16

1984-11-13

Sebastian, Leland A.

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

Organic compounds

Oxygen containing

C07C 7910

Patent

active

044827695

ABSTRACT:
Dinitrotoluene, which is produced by mixed acid nitration of toluene, is purified in a way which produces a product suitable for conversion to toluene diamine and a less environmentally objectionable by-product stream. The process involves contacting a crude dinitrotoluene stream containing by-product nitrophenolic materials with an alkaline material and monitoring the pH such that dinitroorthocresol by-product is maintained in the organic phase while the trinitroorthocresol by-products are converted to water-soluble materials and removed with an aqueous phase.

REFERENCES:
patent: 4224249 (1980-09-01), Kunz et al.
patent: 4361712 (1982-11-01), Herman

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