Partial oxidation of benzene-reaction-stripping, Chemistry

Consider a process for the partial oxidation of benzene to produce maleic anhydride (C4H4O4) using air. There are two reactions to be concerned with: The first partially oxidizes the Benzene to produce maleic anhydride along with carbon dioxide and water.

The second, undesired reaction fully oxidizes the benzene. The process used is as follows:

1) Benzene Purification: The benzene flows into a pressurized still with water at 23.2

psia. The liquid in the still is 80% benzene by mass. Energy is supplied to keep the mixture at its boiling point (180°F) resulting in a vapor mixture of pure water (partial pressure = 7.52 psia) and pure benzene (partial pressure = 15.68 psia). The contaminates along with waste benzene flow out as a liquid.

2) Reaction: The vapor stream is mixed with enough air (T = 150°F, 1 atm, 50% relative humidity) to provide an 18/1 molar ratio of oxygen/benzene entering the reactor. At the exit to the reactor an analysis of the gasses (mole, dry basis) shows 0.76% C4H4O4, and 80.0% nitrogen.

3) Stripping: The exit gasses from the reactor flow into a water scrubber operating at 1 atm. Pure water enters the top of the column and the reactor outlet gas enters the bottom. The water "scrubs" out the maleic anhydride where it exits as a liquid at the bottom of the column with a concentration of (mole %) 12% C4H4O4, 88% water.

Exiting the top of the column as a gas are all of the unreacted benzene, oxygen, carbon dioxide, and nitrogen. This gas stream exits at 142°F saturated with water.

4) Drying: The liquid stream from the scrubber goes to a dryer where the water is driven off leaving pure maleic anhydride. What is (use pound moles):

a) The moles of benzene that are completely oxidized in the reactor per mole of benzene fed into the reactor? (i.e. the moles benzene used in the second reaction per mole fed)

b) The pounds of water leaving the dryer per mole of benzene fed into the reactor?

c) The composition of the gas leaving the scrubber (mole percent, wet basis)?

d) The pounds of water added to the top of the scrubber per mole of benzene fed into the reactor?

Posted Date: 3/9/2013 3:18:14 AM | Location : United States







Related Discussions:- Partial oxidation of benzene-reaction-stripping, Assignment Help, Ask Question on Partial oxidation of benzene-reaction-stripping, Get Answer, Expert's Help, Partial oxidation of benzene-reaction-stripping Discussions

Write discussion on Partial oxidation of benzene-reaction-stripping
Your posts are moderated
Related Questions
Name the building blocks of lecithin. Show the head and tail structures of both lipids in the structure above.   Lipids are substances that are soluble in organic solvent

Chemical Kinetics of the Peroxodisulfate Ion The peroxodisulfate  ion is one of the strongest oxidants that are  called, although the oxidation reaction is relatively slow.

Q. How do we measure food texture? Food texture can be evaluated by mechanical test or instrumental methods. This is called as objective evaluation. When we use the human sens

The correct ground state electronic configuration of chromium atom is: (1) [Ar] 3d 5 4s 1                (2)[Ar]3d 4 4s 2      (3) [AR]3d 6 4s 0                (4

Analytical test of Oxalic acid or Polyprotic acid (a) The aqueous solution turns blue litmus red. (b) The aqueous solution includes effervescences along with NaHCO 3 . (c

gattermann koch reaction mechanism

Q. Explain laws of Electrolysis? Ans . A  spontaneous reaction  takes place by itself. Some redox reactions are not spontaneous. In a  no n-spontaneous redox reaction ,

Discuss about the different types of stones used for the construction and how to determine the good quality stone?

The number of electrons that can be accommodated in dz 2  orbital: (1) 10      (2) 1        (3) 4        (4) 2 Ans:  2

Types of substitution reactions According to the type of the nature of attacking species substitution reactions are categorized into following three categories, (A) Nucleoph