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Chemical Engineering
Chemical Engineering is the branch of engineering that deals with the technology of large-scale chemical production and the manufacture of products through chemical processes. Today, the field of chemical engineering is a diverse one, covering areas from biotechnology and nanotechnology to mineral processing.
1,464 Questions
Why is calcium chloride used in dehumidifier?
Calcium chloride is hygroscopic, meaning that it absorbs water from the air. This is the job of a dehumidifier.
Does ethanol and xylene form azetrope?
Ethanol+Water+p-Xylene is an Azeotropic mixture
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For p-xylene, zeotropic, but for x-xylene, contradictory results. Please see the links.
Can you do Masters in Petroleum Engineering after doing a Bachelors course in Chemical Engineering?
A chemical Engineer is a Jack of all trades but Master of NONE. Yes it is possible to have a Master degree in not only petroleum but also in polymer, atomic, energy, industrial engineering s.
How do you dry N O-dimethylhydroxylamine hydrochloride?
The hydrochloride salts are very easy to absorb moisture, and they are generally sealed with parafilm.
If large amount, you can dry the chemical N,O-dimethylhydroxylamine
hydrochloridewith rotary evaporator, equipped with an oil pump. The chemical will will dry faster and evenly. If small amount, just use an oil pump at at room temperature.
Synthetic polymers are plastics or any other man-made thing!
What is acid slurry chemical property?
I believe the question mean the sulphonic acids. The sulphonic acids are pre-finished of the surfactants and will need future reaction with caustic soda. They are acidic, highly viscous and can do reduce surface tension as the way surfactant do but a lot stronger with pH value approximately 2-3. Most common sulphonic acids is Linear Alkyl Benzene sulphonic acids.
Is there a sleeping gas spray for public sale?
No! These chemicals are dangerous and shouldn't be used by anyone who is not trained to use them.
Is freon the same as R 22 and what is the price per pound for freon?
Freon is another commonly used name for refrigerant, which can include R22, R410, and R12.
The price per pound depends on which type, and should be only installed or sold by a certified technician. In most countries, the release or use of refrigerant by uncertified individuals is illegal.
Did o zone is effective than chlorine for purification oFwater?
Ozone (O3) leave no additional additives in the treated water while chlorine (case NaOCl) will have additional sodium in to the water. For safety control, chlorine systems either NaOCl or direct diffuse of Cl2 involve handling of highly hazardous material while ozone was produced from oxygen in air thus Ozone also rules out in term of safety.
However, in term of lasting disinfection, ozone will revert to oxygen in short time. Ozone treated water may had microbial re-contaminated in shorter period than chlorine treated. For ease of water treatment, ozone require electricity supply and in practical case of Thailand over 2011 flood, chlorine disinfection is a practical use in the flooded area because it could transport small quantity of substance into the flood site with power cut and made simple household treatment for cleaning water from flood water.
What are the hot cities for graffiti around the world?
Athens and Thessaloniki man.
Hard metro and subway, sure fan!
Salonica is great for commuters.
MRIX.2011.
Does anode lose weight and cathode increase in electroplating?
yes, the weight of anode is decreased & added to the weight of the cathode during electroplating
How can you design of ball mill?
*Ball mills are generally smaller in diameter relative to their lengths (i.e. low aspect ratio) when compared with AG and SAG units;
* Ball mills have comparatively high charge densities when compared to AG and SAG mills; and
* Ball mills are rubber lined more often than AG and SAG mills.
The progressive increase in the size of ball mills has led to an ongoing requirement for more accurate and reliable analysis of mill structures (the trunnions, heads, mill shell sections and connections between these components) for a number of reasons:
* Higher levels of reliability have been called for because of the higher capital costs involved, higher levels of availability required and reduced levels of plant redundancy;
* Increased sizes have put more pressure on manufacturing constraints (for example, the maximum size of castings, machining capabilities and so forth). As a result, sizes cannot be indefinitely scaled up, leading to greater pressure to limit section sizes and thicknesses, and hence leading to higher general stress levels, which of necessity are closer to design criteria;
* As sizes have increased, the stresses at non-axisymetric features such as manholes have increased, so that more rigorous analysis of these features becomes necessary;
* The increasing sizes have required that mill structures be manufactured from a larger number of components bolted together. The bolted joints now include radial head joints and longitudinal flange joints (also non-axisymetric structures), as well as the circumferential head and shell joints.
* Those very large ball mills with geared drives typically use large outstand gears, which can have a significant effect on the stresses in the main mill structure. Consequently, these gears need to be modelled as part of the main mill analysis, in sufficient detail to establish the effect of the gear and gear loading on the mill structure. Separate analysis of the gear structure is usually carried out.
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What are the various equation methods of enriching uranium 235 from its natural form?
- centrifuging
- gaseous diffusion
- thermal diffusion
- electromagnetic separation
- expansion from nozzles
- laser enrichment
- ion exchangers
- distillation
The initial stress is the stress of the object before any force is applied to it, which in most cases would be zero ideally. However, the different composites that make up the material react differently to external influences, temperature comes to mind, and may therefore have a net, non-zero stress before an external load is applied.
How do you convert cubic inch to cubic meter?
1 cubic inch = 1.6387064 × 10-5 cubic meters
For every cubic inch, multiply it by 0.000016387064 to attain cubic meters.
Spiral Classifier has two types: High Weir Spiral Classifier and Submerged Spiral Classifier.
High Weir Spiral Classifier: Classifying equipment takes use of the different sedimentation speed of the solid particle in slurry. Capacity: 10～1785 t/d. Product improvement:An automatic elevating apparatus is added to the discharge opening. The scoop in ball mill is eliminated bringing more stable operation.
Submerged Spiral Classifier: Classification equipment---the spiral of overflow end is completely immersed below liquid level. Capacity: 50～1410 t/d. Product improvement: An automatic elevating apparatus is added to the discharge opening. The scoop in ball mill is eliminated bringing more stable operation.(origin: xinhai mining)
Wet classification with Spiral classifiers using separation by gravity covering the size range of 100- 1000 micron (typical). Spiral classifiers use a continuously revolving spiral to move the sands up the slope.
Spiral Classifier is widely used to control material size from Ball Mill in the beneficiation process, separate mineral sand and fine mud in the gravity concentration, and clean mud and water in washing mineral process. This machine has features of simple structure, reliable and convenient operation, etc.(Zoneding Machine)
Why don't transition lenses get dark in hot weather?
What some people call Transitions, a registered trademark, lens are designed and built to react to light levels. Low light the lens stay transparent, when bright light hits the lens the way the lens are made makes the lens change to the apropriate level of dark in a fraction of a second.
Latent heat of vapourisation of Water is 2257 KJ/Kg
= 2257*0.24 kcal/Kg
= 541.68 kcal/kg
Since the temp of water is 100 deg C, and the boiling point is 100 it is sufficient if we provide the latent heat of vapourisation.
The total amount of heat required is =150 *541.68
= 81252 kcal…
Energy we get by burning 1 pound of oil = 5.74 * 10^6 cals
=5740 kcals
Total quantity of oil required =81252/5740
= 14.155 pounds
= 6.4 kgs
Our company is an overseas department of Spring Strength Group, who is the earliest specialized manufacturer of furfural in China. With annual productivity of 5,000 MT, our factory manufacture a mass of furfural with content of 99%,98.5%.
For the advantages of low-price, high-quality and good-service, our products have long enjoyed a great fame both at home and abroad and we are in the belief that you will be pleased with them.
V= Q/A (velocity = volumetric flow rate / area)
conversion: 1000L = 1m3; therefore 1900L/min= 1.9m3/min
V = (1.9m3/min * 1min/60s) / Pi*(.02m)2/4 = 100.798 m/s
Simplified Bernoulli Equation:
∆P/rho + 0.5*(initial velocity2-final velocity2) = 0 (rho=density)
(equation assumes no fluid height changes and no frictional losses)
∆P/(1000 kg/m3) + 0.5*(02 - (100.798 m/s)2) = 0
∆P = 5.08x106 N/m2= 5.08x106 Pascals
P= F/A (Pressure= Force/Area)
F= P*A
F= ∆P * Area = 5.08x106 * Pi*(.02m)2/4 = 1595.97N
A height of nozzle was not given; however, there is a minimum height when you specify a horizontal distance of 50m.
Minimum nozzle height above ground to reach 50 meters horizontal distance:
d=r*t (distance= rate * time)
t= d / r
t= 50m / 100.798m/s = 0.496s
(time for a droplet to leave the nozzle and travel 50m horizontally)
h= g*t2
(height of a falling object = gravity * time2 assuming spray nozzle is horizontal)
h= 9.81m/s2 * (0.496s)2 = 2.41m above grade
The minimum height will change if the nozzle is angled up or down.
Note: 9.81m/s2 is approximately the earth's gravitational acceleration at sea level at the equator.
What definition of discharge in terms of fluid mechanics?
Discharge in fluid mechanics is simply a volumetric flow rate of liquid at the exit
and it can simply be claculated by the equation of continuity
q=(crossectional area of pipe)(velocity of fluid)
