Olin Corporation

Arco Chemical Technology, L.p.

Allen B Quakenbush

Buford T Pennington

Donald L Lickei

Stephen L Goldstein

Peter J Whitman

Michael C Fullington

James L Meyer

Majid N Keyvani

Jeffrey W Baird

Chunjie Zhang

A multi-step process for producing DNT employing a mononitration step in a single liquid phase at an elevated temperature using a carefully controlled amount of water, followed by a phase separation step prior to dinitration of the MNT present in the resulting organic phase. This process results in a DNT product with a desired isomer ratio of 2,4-DNT to 2,6-DNT and provide relatively fast nitration rates with less by-products.

Two-stage dinitrotoluene production process

A process is disclosed for removing a light organic compound from a liquid composition comprising said light organic compound in admixture with a nitroaromatic compound, said light organic compound having a partial vapor pressure in said composition that is greater than the partial vapor pressure of said nitroaromatic compound in said composition, said process comprising contacting said composition with steam or a gas to cause at least a portion of said light organic compound to pass out of said composition and into admixture with said steam or gas.

Process for reducing tetranitromethane in compositions containing

Reduction of dinitrotoluene impurity in water is achieved by distillation in the presence of nitric acid. A suitable process for such reduction comprises (a) contacting said composition with nitric acid to provide a nitric acid-containing composition, (b) distilling at least a portion of said water in said nitric acid-containing composition to provide vaporized water containing a reduced concentration of said dinitrotoluene, and (c) separating said vaporized water from said nitric acid-containing composition.

Removal of dinitrotoluene from process water

Improved process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid. The process reacts toluene with a large excess of concentrated nitric acid, in the presence of a select hydrated nitrate salt which is effective in minimizing explosive hazards, to produce a product which has substantially reduced by-product content.

Process for preparing dinitrotoluene

Process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid. The process reacts toluene with a large excess of concentrated nitric acid at selected conditions to produce a product which has substantially reduced by-product content.

Process for preparing dinitrotoluene with low by-product content

Described herein is a one pot continuous process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid.

Described herein is a one pot continuous improved process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid.

Described herein is a process for separating an acid impurity from a solution containing acid and a nitro substituted aromatic compound by contacting the solution with at least one molten nitrate salt.

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Lake Charles, LA, United States of America

Allen B Quakenbush