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.

Define pneumatic conveying?

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What industries require filtered compressed air?

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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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Question 79 - (a) The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. Let SG = specific gravity of petroleum liquid, and V = barrels of crude oil per metric ton. Given the formula for API gravity = 141.5 / SG - 131.5 and V = (API gravity + 131.5) / (141.5 x 0.159), find the relationship of SG as a function of V. (b) An oil barrel is about 159 litres. If a cylinder with diameter d = 50 cm and height h = 50 cm is used to contain the oil, find the volume V of the cylinder in the unit of oil barrel by using the formula V = 3.142 x d x h x d / 4. (c) First reference : 1 cubic metre = 6.2898 oil barrels. Second reference : 1 cubic metre = 6.37 oil barrels. What are the 2 factors that cause the difference in such reference data?

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oil field interview question

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motor vs pump

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how to calculate overall heat transfer coefficient in insulated pipeline? Please give a answer with formula

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What are the different ways in which solids can be blended?

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plz send me hpcl and reliance entrance test papers on my id s,kumar_bk@yahoo.co.in

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Dear guys we adding hypo at climax plant and that water is inlet to DM plant so with hypo water that can affect my resins of cation and anion. if it is affect life of my anion and cation so what kind of steps should be take.

0 Answers   Hindustan Unilever Limited,

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Question 39 - Acetone and ethanol are separated using a distillation column with a partial condenser and partial reboiler. An equimolar, sub-cooled liquid feed enters at 100 kmol / hr and condenses 1 mole of vapor for every 6 moles of feed. The separation requires a distillate vapor that is 95 mol % acetone and bottoms liquid that is 5 mol % acetone. The reflux is returned from the condenser to the column as a saturated liquid and the operation is run at (L / V) = 1.4 * (L / V) min. Assume constant overflow conditions. (a) Feed operating line is y = [ q / (q - 1) ] x - z / (q - 1) where z = 0.5 for equimolar liquid mixture of 2 components, q = (L’ - L) / F where L’ = L + F + (F / 6) for condensation of 1 mole of vapor / 6 moles of feed. What is y = f(x)? (b) The rectifying operating line is y = (L / V) x + (D / V) (xd) where (L / V) min goes through the points A (0.95, 0.95) and B (0.53, 0.69), V = L + D. What is y = f(x)? Let xd = 0.95. (L / V) min is the slope of the 2 points A and B.

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POLYMER ENGINEERING - QUESTION 24.3 : The molecular weights M in kg / mol of 3 different monomers a, b and c in a polymer are Ma = 14, Mb = 16 and Mc = 18, with their respective quantities in N units having the ratio of Na : Nb : Nc = 2 : 3 : 5. (a) Find the numerical average molecular weight of the polymer by using the formula (Ma Na + Mb Nb + Mc Nc) / (Na + Nb + Nc). (b) Find the weighted average molecular weight of the polymer by using the formula (Ma Na Ma + Mb Nb Mb + Mc Nc Mc) / (Ma Na + Mb Nb + Mc Nc). (c) Calculate the polydispersity Q by using the answer in (b) divided by answer in (a). (d) Find the volumetric average molecular weight of the polymer by using the formula (Ma Na Ma Ma + Mb Nb Mb Mb + Mc Nc Mc Mc) / (Ma Na Ma + Mb Nb Mb + Mc Nc Mc). (e) Estimate the polydispersity Q by using the answer in (d) divided by answer in (b).

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