from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See propylene.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The official IUPAC name for the organic chemical compound propylene. An alkene which is a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C3H6.
from the GNU version of the Collaborative International Dictionary of English
- n. Same as propylene.
from The Century Dictionary and Cyclopedia
- n. Same as propylene.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a flammable gas obtained by cracking petroleum; used in organic synthesis
Sorry, no etymologies found.
There is, quite often, an excess of propene, especially in oil refineries that do not have petrochemicals, as in the United States.
The "gasoline" version (Figure 1) consists of dimerising propene to high-octane isohexenes.
Both of these mechanisms were based on smog chamber experiments involving butane and propylene or propene, if you're a nomenclature purist.
So I suggested that they load one side of the chamber with a standard mix of NOx and propylene or propene, or methyl ethane, which are different words for the same stuff, and the other side with the same mix, plus some toluene.
In the next step this rapidly reacts either with Nu - and gives the substitution product or transfers a proton to the solvent or Nu - to give propene.
The rates of Hf-Zn/Zn-Al transfer are much faster than direct Hf-Al exchange, and all the chain-transfer rates are faster than the propene insertion step, Sita notes.
During polymerization, propene monomer units insert between hafnium and the existing polypropylene chain, Sita explains.
The palladium catalysts outperformed the platinum ones in nitric oxide and propene conversion; however, they fell short in the processing of propane unless the temperature was above 320 ºC (600 ºF).
Gouw found that the concentrations of ethene and propene -- which both contribute to ozone formation -- dropped by 52 percent and 48 percent respectively between 2000 and 2006.
The team tested the filters 'ability to act as catalysts by depositing palladium onto the nanotubes and using them to turn propene into propane, a benchmark test for catalysis.
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