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US 8,558,039 B2Granted
Hydrocarbon feed flexible high pressure nitration plant design
AssigneesDow Global Technologies LLC, Angus Chemical Company
InventorsMahesh Sawant, Daniel M. Trauth, John G. Pendergast, Jr., Ravindra S. Dixit
Life of this patent
Estimating the term…
Abstract
Disclosed is an apparatus for synthesizing nitroalkanes by reaction of a hydrocarbon feedstock with aqueous nitric acid. The apparatus may be designed such that it can synthesize more than one nitroalkane using the same equipment.
Claims7
A process for synthesizing a first nitroalkane and a second nitroalkane, the process comprising:
- reacting a first feedstock in a reactor with aqueous nitric acid at a reaction temperature of between about 140 degrees Celsius and about 325 degrees Celsius and a reaction pressure of at least about 6.89×106 Pascal to produce a first reaction product stream;
- quenching the first reaction product stream in a cooling system such that the first reaction product stream phase separates into at least a first gas phase, a first oil phase, and a first aqueous phase;
- absorbing in an absorber water-soluble and oil-soluble components from the first gas phase to form a first hydrocarbon gas stream and a first gas-recovered mixture;
- forming in a separator a first combined gas-recovered aqueous phase and a first combined gas-recovered oil phase from the first gas-recovered mixture, the first oil phase, and the first aqueous phase;
- recovering the first nitroalkane from at least one of the first combined gas-recovered aqueous phase and the first combined gas-recovered oil phase;
- reacting a second feedstock in the reactor with aqueous nitric acid at a reaction temperature of between about 140 degrees Celsius and about 325 degrees Celsius and a reaction pressure of at least about 6.89×106 Pascal to produce a second reaction product stream;
- quenching the second reaction product stream in the cooling system such that the second reaction product stream phase separates into at least a second gas phase, a second oil phase, and a second aqueous phase;
- absorbing in the absorber water-soluble and oil-soluble components from the second gas phase to form a second hydrocarbon gas stream and a second gas-recovered mixture;
- forming in the separator a second combined gas-recovered aqueous phase and a second combined gas-recovered oil phase from the second gas-recovered mixture, the second oil phase, and the second aqueous phase;
- and
- recovering the second nitroalkane from at least one of the second combined gas-recovered aqueous phase and the second combined gas-recovered oil phase.
8 more elements
Dependencies are inferred from the claim text.