Mass Transfer

Obtain an expression for estimation of the compositions in enriching section and in a stripping section.

Write short note on:

Multistage leaching.

Write short note on:

Equilibrium diagrams

Write short note on:

Preparation of solids for leaching

Write short note on:

Leaching equinment 

With sketch explain the bimodal solubility curve what do you mean by solutropic solution and plait point.

What are the factors to be considered for the choice of solvent for extraction?

200 kgs of Aqueous acetic acid solution containing 25% acetic acid is to be extracted with 150 kg of isopropyl ether solvent at 20°C. Two batch extractions are to be done with fresh and pure solvent. Estimate the quantities and composition of extract and raffinate product. 

Briefly explain extractive and azeotrophic distillation.

Explain the step-by-step procedure to find the no. of trays by Panchon-Savarit method.

A continuous fractionating column is to be designed to separate 13600 kg/hr of mixture of 40% Benzene and 60% Toulene into a overhead product containing 97% Benzene and 98% toulene bottom product (wt %). A reflux ratio of 3.5 is to be used. Calculate the moles of overhead and bottom product in kg/hr. Determine the no. of plates and position of feed plate. If the feed is at its boiling point.

Explain the concept of minimum liquid to gas ratio for gas absorption.

What do you mean by flash distillation? For the following data, compute how many moles of residue remains at eguanlibrium

Feed composition = 0.5

Average relave volatility = 2.16

60% (mole%) feed in vaporized

Vapotil Composition at equilibrium = 0.575

Residue composition at equilibrium =0.387 

Derive Reyleigh's equation simple distillation.

With the help of P-xy and T-xy, diagrams, explain the minimum boiling mixture and maximum boiling mixtures.

Explain in details how pressure of gas is very critical in the operation of absorption column. 

What are the advantages of packed tower colomn over other types? Explain.

Explain HTU and NTU concepts.

With a neat sketch, show the flow pattern in an Absorption column with notation and material balance .

What are the factors to be considered before selecting so lvent for absorption?

Define and explain point efficiency Murphy tray efficiency and overall efficiency.