Engineering homework help needed

timer Asked: Oct 28th, 2015

Question description

Nitrobenzene is made by the direct nitration of benzene by nitric acid in the presence of strong sulphuric acid solution: C6H6 + HNO3 C6H5NO2 + H2O

The actual nitrating agent is the nitronium ion, NO2+, and the sulphuric acid is needed to generate this from the nitric acid feed. Sulphuric acid, of strength 66% by weight and 90˚C is mixed with pure nitric acid at 25˚C to give a nitric acid strength in the mixture of 7.5% by weight and temperature of X˚C. The mixed acid is then passed through a heat exchanger to bring its final temperature to Y˚C and fed to the reactor. Liquid benzene at 25˚C is also fed to the reactor at a rate to give a 10% stoichiometric excess based on the nitric acid flow. The reactor operates adiabatically and gives 100% conversion of the nitric acid. All products leave the reactor as liquids at 138˚C. The sulphuric acid is re-concentrated to 66% and recycled, while the nitrobenzene is sent for purification.

(i) The temperature, X˚C of the mixed acids after mixing; (ii) The temperature, Y˚C, at which the mixed acids enter the reactor.

You may assume that the organics benzene and nitrobenzene form an ideal liquid mixture, and there is complete immiscibility between organics and inorganics.

Tutor Answer

(Top Tutor) Studypool Tutor
School: New York University
Studypool has helped 1,244,100 students
flag Report DMCA
Similar Questions
Hot Questions
Related Tags
Study Guides

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors