Answer / anand

actually above 350-375 oC temp. the crude oil is going to
crack and the light product will form. but the main aim of
this distillation process is to seperate the various
fractions rather than producing the light product. so to
avoid this the residue of the atmospheric distillation
tower is processed under vacuum above 350 oC and we get the
various types of product which will be useful for making
various types of lubricating oil, mineral oil, transformer
oil, quenching oil etc.

Answer / sourya

All the fractions that can be separated by the distillation
process under atmospheric conditions is separated in the ADU
and the higher molecular weight fractions that crack under
those conditions to produce carbon(petroleum coke) is
removed as the bottoms and then passed on to the next Vacuum
Distillation unit(VDU) for recovery of all the higher fractions.

Answer / dhanashree

The main aim of distillation is to obtained various
petroleum product at various temp. & press. for that
recovery ,distillation system require rage of temp. As
petrolium products are heighly explosive, catches fire at
low temp.Vaccum distillation is used in petroleum refinery.
Becouse under vaccum the boiling point of liquid get lowers
down & pressure required is also less.

Answer / pushkar deo

It is a process for getting vacuum distilates for
lubricating oil and to get feed for FCC.

What is a Spool in terms of piping Industry?

2 Answers   Punj Lloyd Ltd,

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Suppose you have hot oil and cold water, what kind fluid you flow In shell side and tube side and why?

5 Answers  

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ACCOUNTING AND FINANCIAL ENGINEERING - EXAMPLE 34.1 : (i) In the pricing of engineering bonds, 3 sets of data for Portfolio Value, Probability, Senior Tranche and Junior Tranche are : $2000, 81 %, $1000, $1000; $1000, 18 %, $1000, $0; $0, 1 %, $0, $0. By assuming independent defaults, find the price for : (a) Senior Tranche; (b) Junior Tranche. (ii) Assuming statistical independence of the values in the sample, the standard deviation of the mean (S) is related to the standard deviation of the distribution (s) by : N x S x S = s x s, where N is the number of observations in the sample used to estimate the mean. In a drug development project, let s = 1. Find the value of S if such a similar project is performed 100 times.

1 Answers  

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Anyone please tell me the relation between the m3/hr and kg/hr??...there is some relation to find volume??.

8 Answers   Reliance,

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REACTION ENGINEERING - EXAMPLE 13.3 : The half-life for first order reaction could be described in the differential equation dC / dt = -kC where k is a constant, C is concentration and t is time. (a) Find the equation of C as a function of t. (b) Find the half life for such reaction or the time required to reduce 50 % of the initial concentration, where k = 0.139 per minute. (c) When the initial concentration Co is 16 mol / cubic metre, how long does the reaction required to achieve the final concentration of 1 mol / cubic metre?

1 Answers  

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Is there any way to remove residual product left in pipes after a batch operation?

0 Answers  

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QUANTUM CHEMISTRY AND CHEMICAL ENGINEERING - EXAMPLE 31.7 : (a) The correct statement about both the average value of position (<x>) and momentum (<p>) of a 1-dimensional harmonic oscillator wavefunction is <x> = <p> = 1 - x. Find the value of x. (b) The probabilities of finding a particle around points A, B and C in the wavefunction y = f(x) are P(A), P(B) and P(C) respectively. Coordinates are A (3,5), B (4,-10) and C (6,7). Arrange P(A), P(B) and P(C) in term of a < b < c, when | y-coordinate | signifies the probability.

1 Answers  

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respected sir,i have been selected in the written examination prelim (CHEMICAL) of RINL(RASHTRIYE ISPAT NIGAM LTD.) held on 20 JUNE, So please tell me which type of questions will be asked in 2nd stage written exam. plz send me last 2-3 years questions asked in RINL(written exam).

1 Answers  

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EXAMPLE 34.14 : For a formula of y = [ 1 - 1 / (1 + r) ^ n ] / r, let y = present value, r = interest rate / year, n = number of years to future value of 1 : (a) Find a simple mathematical relationship of y as a function of r when n = 1 million years. (b) What is the present value of $10000, if the annual discount rate is 10 %, forever?

1 Answers  

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What is the process of including heat exchangers in ammonia refrigeration system?

0 Answers  

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Define pneumatic conveying?

0 Answers  

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What are the methods involved to test helium leak testing in a vacuum system?

0 Answers  

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