On 31 April 2008 the Petromont Varennes plant closed its methylacetylene / propadiene crackers.
2.
Since braze welding usually requires more heat than brazing, acetylene or methylacetylene-propadiene ( MAP ) gas fuel is commonly used.
3.
This gas was a mixture of propyne, CH 3 Ca " CH, and propadiene, CH 2 = C = CH 2.
4.
Dimethyl ether is also a component of certain high temperature " MAP-plus " blowtorch gas blends, supplanting the use of methyl acetylene and propadiene mixtures.
5.
For a later Dow / Petromont gas propyne 30 %, propadiene 14 %, propylene 43 %, propane 7 %, C 4 H 10 ( isobutane, butane ) 6 % might be more typical.
6.
The systematic names " 1? 2, 3? 2-propadiene ", and " ?-carbidodicarbon ", valid IUPAC names, are constructed according to the substitutive and additive nomenclatures, respectively.
7.
"' " MAPP gas " "'is a trademarked name, belonging to The Linde Group, and previously belonging to the Dow Chemical Company, for a fuel gas based on a stabilized mixture of UN 1060 stabilised methylacetylene-propadiene ( unstabilised methylacetylene-propadiene is known as MAPD ).
8.
"' " MAPP gas " "'is a trademarked name, belonging to The Linde Group, and previously belonging to the Dow Chemical Company, for a fuel gas based on a stabilized mixture of UN 1060 stabilised methylacetylene-propadiene ( unstabilised methylacetylene-propadiene is known as MAPD ).
9.
"Methylacetylene-propadiene " ( MAPP ) " gas " and " LPG gas " are similar fuels, because LPG gas is liquefied petroleum gas mixed with MPS . It has the storage and shipping characteristics of LPG and has a heat value a little less than acetylene.
10.
In appropriate contexts, tricarbon can be viewed as propadiene with four hydrogen atoms removed, or as propane with eight electrons removed; and as such, " propadienediylidene " or " propanetetraylidene ", respectively, may be used as a context-specific systematic names, according to substitutive nomenclature.
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