1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
levacccp [35]
2 years ago
11

A distillation column with a partial reboiler and a total condenser is being used to separate a mixture of benzene, toluene, and

1,2,3-trimethylbenzene. The feed, 40 mol% benzene, 30 mol% toluene, and 30 mol% 1,2,3-trimethylbenzene, enters the column as a saturated vapor. We desire 95% recovery of the toluene in the distillate and 95% of the 1,2,3-trimethylbenzene in the bottoms. The reflux is returned as a saturated liquid, and constant molar overflow can be assumed. The column operates at a pressure of 1 atm. Find the number of equilibrium stages required at total reflux, and the recovery fraction of benzene in the distillate. Solutions of benzene, toluene, and 1,2,3-trimethylbenzene are ideal.
Chemistry
1 answer:
ololo11 [35]2 years ago
8 0

Answer:

11.8.4 Distillation Columns

Distillation columns present a hazard in that they contain large inventories of flammable boiling liquid, usually under pressure. There are a number of situations which may lead to loss of containment of this liquid.

The conditions of operation of the equipment associated with the distillation column, particularly the reboiler and bottoms pump, are severe, so that failure is more probable.

The reduction of hazard in distillation columns by the limitation of inventory has been discussed above. A distillation column has a large input of heat at the reboiler and a large output at the condenser. If cooling at the condenser is lost, the column may suffer overpressure. It is necessary to protect against this by higher pressure design, relief valves, or HIPS. On the other hand, loss of steam at the reboiler can cause underpressure in the column. On columns operating at or near atmospheric pressure, full vacuum design, vacuum breakers, or inert gas injection is needed for protection. Deposition of flammable materials on packing surfaces has led to many fires on opening of distillation column for maintenance.

Another hazard is overpressure due to heat radiation from fire. Again pressure relief devices are required to provide protection.

The protection of distillation columns is one of the topics treated in detail in codes for pressure relief such as APIRP 521. Likewise, it is one of the principal applications of trip systems.

Another quite different hazard in a distillation column is the ingress of water. The rapid expansion of the water as it flashes to steam can create very damaging overpressures.

You might be interested in
What is the noble Gas notation for Bromine (Br)?
PSYCHO15rus [73]
3d10 4s2 4p5. I think
6 0
3 years ago
Which of the following is the best definition of a physical change?
ELEN [110]
I think answer is

C. Something that can be observed or measured while changing the identity of the substance
7 0
3 years ago
Read 2 more answers
The goal of this experiment is to separate a mixture of two unknown compounds into individual components and to identify the com
kolbaska11 [484]

Answer: Ethyl Ethanoate can be used as a developing solvent. It’s safer.

Explanation:Di ethyl ether should be carefully used because it’s highly flammable and intoxicating when inhaled and can cause explosions because of its high reactivity to air and light.

3 0
3 years ago
Inertia is _____ to mass
Arisa [49]

Answer:

directly proportional

6 0
3 years ago
Read 2 more answers
Do you guys know any cool app for revision apart from quiz let
hammer [34]
Kahoot, there are some pretty great reviews on there but you may need to do some searching
7 0
3 years ago
Other questions:
  • If i add water to 100 mL of a 0.15M NaOH solution until the final volume 150mL , what will the molarity of the diluted solution
    15·1 answer
  • A 0.3146 g sample of a mixture of NaCl ( s ) and KBr ( s ) was dissolved in water. The resulting solution required 45.70 mL of 0
    10·1 answer
  • Which of these has a higher hydrogen ion concentration? *
    12·1 answer
  • Water can resist a greater external force than ethanol can. Which statement best describes this difference? Water has less capil
    13·2 answers
  • If the pressure of a gas is 100 kPa when the volume is measured to be 500 mL. What pressure would need to be exerted to have the
    12·1 answer
  • Acetic acid, CH3CO2HCH3CO2H, is the main organic constituent of vinegar. Draw an electron-dot structure for acetic acid. (The tw
    8·1 answer
  • What volume of water must be added to 10.5 mL of a pH 2.0 solution of HNO3 in order to change the pH to 4.0 g
    15·1 answer
  • Sally does the work in 2.3 hours and Pete does 2.5
    10·2 answers
  • How does thermal energy affect chemical changes
    7·1 answer
  • Balance the following equation by providing the correct coefficients C2H6 + O2 -> CO2 + H2O
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!