ELEM.PRIN.OF CHEM.PROCESS-ACCESS
4th Edition
ISBN: 9781119099918
Author: FELDER
Publisher: WILEY
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Textbook Question
Chapter 5, Problem 5.28P
In froth ?otation, air is bubbled through an aqueous solution or slurry to which a foaming agent (soap) has been added. The air-soap bubbles carry ?nely dispersed solids and hydrophobic materials such as grease and oil to the surface where they can be skimmed off in the foam.
An ore-containing slurry is to be processed in a froth ?otation tank at a rate of 300 tons/h. The slurry consists of 20.0 wt% solids (the ore, SG = 1.2) and the remainder an aqueous solution with a density close to that of water. Air is sparged (blown through a nozzle designed to produce small bubbles) into the slurry at a rate of 40.0 ft3(STP)/1000 gal of slurry. The entry point of the air is 10 ft below the slurry surface. The tank contents are at 75°F and the barometric pressure is 28.3 inches of Hg. The sparger design is such that the average bubble diameter on entry is 2.0 mm.
(a) What is the volumetric ?ow rate of the air at its entering conditions?
(b) By what percentage does the average bubble diameter change between the entry point and the slurry surface?
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QUESTIONS AND PROBLEMS
4.1. With 100,000 BPD of the following crude (API = 36), estimate the
products of the atmospheric distillation column. If the atmospheric
residue of the crude is taken at 650+ F. It enters in a vacuum distilla-
tion tower to give three products: light vacuum gas oil (650-850 °F),
heavy vacuum gas oil (850-1050 °F) and vacuum residue (1050+ °F).
Calculate the mass flow rate of these products. Then calculate the
sulphur content (lb/hr) for each product.
ASTM D86 (°F) vol%
Cum vol%
SG
86
0.0
0.0
122
0.5
0.5
0.6700
167
1.2
1.7
0.6750
212
1.6
3.3
0.7220
257
2.7
6.0
0.7480
3021
3.1
9.1
0.7650
347
3.9
13.0
0.7780
392
4.7
17.7
0.7890
437
5.7
23.4
0.8010
4821
8.0
31.41
0.8140
527
10,7
42.1
0.8250
584
5.0
47.1
0.8450
6361
10,0
57.1
0.8540
689
7,8
64.9
0.8630
7421
7.0
71.9
0.8640
794
6.5
78.4
0.8890
20.8
99.2
0.9310
Show transcribed image text
Here's the best way to solve it.
This problem…
Q1/obtain the transfer function for the block diagram shown in the
figure below:
G4
G
(Population density parameters from sieve analysis data)2 One hundred fifty grams
of crystals separated from one litre of suspension from an MSMPR crystallizer is
subjected to screen analysis to get the following data:
Tyler mesh
Mass(g)
12/14
28.5
14/20
29.2
20/28
28/35
35/48
below 48 mesh
37.5
27
24.7
3.1
Mesh no./ screen opening(um) data: 12/1410 μm; 14/1190; 20/841; 28/595; 35/420;
48/297.
The working volume of the crystallizer is 200 litres, and the rate of withdrawal of the
slurry is 250 litre per hour. Given pc = 1400 kg/m³ and volume shape factor o, = 0.42,
determine the crystal growth rate and the zero-size population density of the crystals.
What is the rate of nucleation, Bº?
Chapter 5 Solutions
ELEM.PRIN.OF CHEM.PROCESS-ACCESS
Ch. 5 - A liquid mixture containing 40.0 wt% n-octane and...Ch. 5 - Prob. 5.2PCh. 5 - Prob. 5.3PCh. 5 - Prob. 5.4PCh. 5 - Prob. 5.5PCh. 5 - Prob. 5.6PCh. 5 - Prob. 5.7PCh. 5 - Prob. 5.8PCh. 5 - Prob. 5.9PCh. 5 - Prob. 5.10P
Ch. 5 - Prob. 5.11PCh. 5 - Prob. 5.12PCh. 5 - Prob. 5.13PCh. 5 - Prob. 5.14PCh. 5 - Prob. 5.15PCh. 5 - Prob. 5.16PCh. 5 - Prob. 5.17PCh. 5 - Prob. 5.18PCh. 5 - Prob. 5.19PCh. 5 - A device has been designed to measure the flow...Ch. 5 - Prob. 5.21PCh. 5 - Prob. 5.22PCh. 5 - Spray drying is a process in which a liquid...Ch. 5 - Prob. 5.24PCh. 5 - Lewis12 describes the hazards of breathing air...Ch. 5 - A stream of air at 35°C and a gauge pressure of...Ch. 5 - Prob. 5.27PCh. 5 - In froth ?otation, air is bubbled through an...Ch. 5 - Prob. 5.29PCh. 5 - Prob. 5.30PCh. 5 - Bread is typically made by ?rst dissolving...Ch. 5 - Prob. 5.32PCh. 5 - Prob. 5.33PCh. 5 - Prob. 5.34PCh. 5 - Prob. 5.35PCh. 5 - Prob. 5.36PCh. 5 - Prob. 5.37PCh. 5 - Prob. 5.38PCh. 5 - Prob. 5.39PCh. 5 - A spray-drying operation similar to that described...Ch. 5 - Prob. 5.41PCh. 5 - Fermentation is a biochemical process in which a...Ch. 5 - Prob. 5.43PCh. 5 - Prob. 5.44PCh. 5 - Ethane at 25°C and 1.1 atm (abs) flowing at a rate...Ch. 5 - The ?ow of air to a gas-?red boiler furnace is...Ch. 5 - Prob. 5.47PCh. 5 - The oxidation of nitric oxide NO+12O2NO2 takes...Ch. 5 - Prob. 5.49PCh. 5 - 5.50.19 In chemical vapor deposition (CVD), a...Ch. 5 - A gas turbine power plant receives a shipment of...Ch. 5 - Prob. 5.52PCh. 5 - 5.53.20 Chemicals are stored in a laboratory with...Ch. 5 - Prob. 5.54PCh. 5 - Prob. 5.55PCh. 5 - A stream of ho dry nitrogen flows through a...Ch. 5 - Prob. 5.57PCh. 5 - You have purchased a gas cylinder that is supposed...Ch. 5 - The current global reliance on fossil fuels for...Ch. 5 - Two humid gas streams are combined in a heated...Ch. 5 - Most of the concrete used in the construction of...Ch. 5 - The ultimate analysis of a No. 4 fuel oil is 86.47...Ch. 5 - A stream of liquid n-pentane flows at a rate of...Ch. 5 - Alka-Seltzer( is an over-the-counter medicine used...Ch. 5 - Hydrogen sul?de has the distinctive unpleasant...Ch. 5 - The quantity of sulfuric acid used globally places...Ch. 5 - A small power plant produces 500 MW of electricity...Ch. 5 - You have been assigned the task of measuring the...Ch. 5 - Prob. 5.69PCh. 5 - Methanol is synthesized from carbon monoxide and...Ch. 5 - Prob. 5.71PCh. 5 - Prob. 5.72PCh. 5 - Steam reforming is an important technology for...Ch. 5 - A ?owchart of a methanol synthesis process is...Ch. 5 - The measured volumetric flow rate of ethane at...Ch. 5 - Prob. 5.76PCh. 5 - Methanol is to be delivered to a process unit at a...Ch. 5 - Prob. 5.78PCh. 5 - Prob. 5.79PCh. 5 - Prob. 5.80PCh. 5 - Prob. 5.81PCh. 5 - Prob. 5.82PCh. 5 - Prob. 5.83PCh. 5 - Prob. 5.84PCh. 5 - Prob. 5.85PCh. 5 - Prob. 5.86PCh. 5 - Prob. 5.87PCh. 5 - Prob. 5.88PCh. 5 - Prob. 5.89PCh. 5 - A fuel cell is an electrochemical device that...Ch. 5 - In a metered-dose inhaler (MDI), such as those...Ch. 5 - Prob. 5.92PCh. 5 - Prob. 5.93PCh. 5 - Approximately 150 SCFM (standard cubic feet per...Ch. 5 - Prob. 5.95PCh. 5 - Prob. 5.96PCh. 5 - Prob. 5.97PCh. 5 - The product gas from a coal gasification plant...Ch. 5 - Prob. 5.99PCh. 5 - Prob. 5.100PCh. 5 - A gas mixture consisting of 15.0 mole% methane....Ch. 5 - A system has been devised to store acetonitrile...Ch. 5 - Prob. 5.103PCh. 5 - Prob. 5.104P
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