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Topic: Methylacetylene

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Propyne

MAPP gas

Methane

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Acetic acid

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Acetylene

Hydrochloric acid

Hydrogen

Allene

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	Control of the concentration of methylacetylene and propadiene in a propylene/propane fractionation column - Patent ...
		In this alternative operation of the invention the methylacetylene and propadiene content is maintained within a range of 2 percent to 6 percent.
		In a third alternative analyzer recorder controller 57 determines the methylacetylene plus propadiene content on a tray 59 of the separation column and generates a signal to which flow recorder controller 51 responds to control the flow of propane from line 47 through control valve 53 into the feed stream 39.
		In a preferred operation the methylacetylene plus propadiene content is controlled according to the position of the tray within the separation column from which the sample is taken.
	www.freepatentsonline.com /4540422.html (1329 words)

	Hydrogenation process - Patent 5866734 (Site not responding. Last check: 2007-09-30)
		A Pd/Cr catalyst on alumina is likewise used for the gas-phase hydrogenation of propadiene and methylacetylene.
		C., 660 g/h of a gas mixture composed of 6.8% of propane, 1.7% of propadiene and 2.2% of methylacetylene in propylene were mixed with differing amounts of hydrogen and passed over the catalyst at an inlet temperature of 50.degree.
		C., 520 g/h of a C.sub.3 stream from a steam cracker composed of 6.8% by volume of propane, 1.7% by volume of propadiene and 2.2% by volume of methylacetylene in propylene and 13 standard l/h of hydrogen were passed over is the catalyst at an inlet temperature of 10.degree.
	www.freepatentsonline.com /5866734.html (8355 words)

	HighBeam Encyclopedia â“ Free Online Encyclopedia for Reference, Research, Facts
		There are two butynes, 1-butyne and 2-butyne, which are structural isomers that differ in the location of the triple bond in their molecule.
		The alkynes are sometimes referred to as the acetylene series, the higher members of the series being named as derivatives of acetylene, e.g., propyne as methylacetylene, 1-butyne as ethylacetylene, and 2-butyne as dimethylacetylene.
		The usefulness of the alkynes in chemical synthesis is due both to the reactions of the triple bond itself and to the relative acidity of a hydrogen atom bonded to a triply bonded carbon.
	www.encyclopedia.com /printable.aspx?id=1E1:alkyne (231 words)

	MAPP (Bruce Dunn) (Site not responding. Last check: 2007-09-30)
		Methylacetylene is CH3-C-(triple bond)-CH, while propadiene is CH2=C=CH2 The vapor pressure of methylacetylene is lower than that of MAPP gas, and the density is higher due to the elimination of the propane (C3H8) and propylene (C3H6).
		Burned with liquid oxygen, the theoretical exhaust velocity of methylacetylene (C3H4) is about 3.5 % higher than that of kerosene, but the bulk density including both the fuel and oxidizer is about 10% lower.
		This is favorable compared with methane (CH4), which has an exhaust velocity of about 3.8% higher than kerosene, but a bulk density of 22% lower (both hydrocarbons assumed to be at their normal boiling point at atmospheric presure).
	yarchive.net /space/rocket/fuels/mapp.html (175 words)

	Isolation of MAPD Cut and Allene (Site not responding. Last check: 2007-09-30)
		With respect to FMM practice MAPD cut has much in common with acetylene, whereas with respect to its handling, storage, toxicity, explosion hazard it is similar to propane (liquefied petroleum gas).
		propadiene and methylacetylene may serve as raw materials for a number of organic synthesis processes.
		VNIIOS Co. has developed a technology for isolation of MAP cut and individual components thereof - propadiene and methylacetylene appearing as by-products of ethylene-producing facility.
	www.vniios.ru /english/11.htm (129 words)

	Publications_1001 (Site not responding. Last check: 2007-09-30)
		The formation of nitriles in hydrocarbon-rich atmospheres of planets and their satellites: Laboratory investigations by the crossed molecular beam technique.
		The reaction of the ethynyl radical, C2H, with methylacetylene, CH3CCH, under single collision conditions: A DFT and ab-initio study.
		Kinetics of reactions of C2H radical with acetylene, O2, methylacetylene, and allene in a pulsed Laval nozzle apparatus at T=103 K. Chem.
	www.lpi.usra.edu /IJW/pubs_1001.html (408 words)

	LEE, YUAN T. - CIRS
		Crossed beam reaction of phenyl radicals with unsaturated hydrocarbon molecules.
		Chemical dynamics of phenylmethylacetylene (C6H5CCCH3;X1A') formation from reaction of C6H5(X2A1) with methylacetylene, CH3CCH (X1A1).
		Reaction of the ethynyl radical, C2H, with methylacetylene, CH3CCH, under single collision conditions: Implications for astrochemistry.
	www.cirs.net /researchers/researchers.php?id=208 (386 words)

	Alternate SSTO Propellants
		With propellants at their normal boiling point (or at 25 C for those storable without excessive pressure), there are 4 propellant combinations that give a 10% or better performance relative to the classic combination of RP-1 and LO2.
		The high performers (UDMH, methylacetylene, propargyl alcohol, and cyclopropane) are marked in bold.
		With pre-chilled propellants at 10 K above their melting points, the increase in payload attributable to the higher density ranges from approximately 20 to 30%, with occasional propellants showing greater increases.
	www.dunnspace.com /alternate_ssto_propellants.htm (1705 words)

	The O(3P) Methylacetylene Reaction over Wide Temperature and Pressure Ranges (Site not responding. Last check: 2007-09-30)
		The O(3P) Methylacetylene Reaction over Wide Temperature and Pressure Ranges
		Rate coefficients for the reaction between ground-state O atoms and methylacetylene have been measured using the High-Temperature Photochemistry (HTP) technique at temperatures from 300 to 1350 K and pressures from 100 to 700 mbar.
		This suggests that addition is the only significant initial O-atom attack step even at temperatures as high as those encountered in atmospheric-pressure methylacetylene-air flames.
	pubs.acs.org /cgi-bin/abstract.cgi/jpchax/1996/100/i42/abs/jp961326q.html (183 words)

	Amazon.com: Investigation of methods for the preparation of methylacetylene (Experiment inc., Richmond. TM) (Experiment ... (Site not responding. Last check: 2007-09-30)
		Amazon.com: Investigation of methods for the preparation of methylacetylene (Experiment inc., Richmond.
		This item is not eligible for Amazon Prime, but over a million other items are.
		Investigation of methods for the preparation of methylacetylene (Experiment inc., Richmond.
	www.amazon.com /exec/obidos/external-search?tag=httpexplaguid-20&mode=books&keyword=Methylacetylene (340 words)

	Recent Publications by NIST Authors
		Gas chromatographic analysis of the photolyzed samples showed diacetylene (C^d4^H^d2^) as the major stable product.
		Addition of methane in the photolysis mixtures resulted in reduction of diacetylene and production of methylacetylene and ethane.
		A transient absorption, within the spectral range of 235 nm to 270 nm, using real-time UV-absorption spectroscopy, was detected.
	ois.nist.gov /nistpubs/technipubs/recent/search.cfm?dbibid=5668 (177 words)

	reseach description of group
		These pioneering studies are revealing the molecular mechanisms of key reaction steps during both transient and steady state catalytic oxidation.
		Recent in-situ studies on the Pt(111) surface have revealed that during steady state propylene oxidation the primary surface intermediate is methylacetylene even in large excesses of oxygen.
		The structure and bonding of this interesting intermediate has been characterized using a combination of soft X-ray methods.
	www.umich.edu /~surface/research.html (807 words)

	The Trans-Bent Structures of the Acetylene and Methylacetylene Radical Anions
		The Trans-Bent Structures of the Acetylene and Methylacetylene Radical Anions
		Graduate School at Beijing, University of Science and Technology of China, Academia Sinica, P.O. Box 3908, Beijing 100039, P. China
		For explanations to the experimental fact that unstable acetylene and methylacetylene radical anions (A
	pubs.acs.org /cgi-bin/abstract.cgi/jpcafh/2001/105/i05/abs/jp0033418.html (295 words)

	[No title] (Site not responding. Last check: 2007-09-30)
		Please select filters above to narrow your results.
		MAPP® (C3H4) – MAPP® is a stabilized mixture of Methylacetylene and Propadiene.
		MAPP gas is a very versatile fuel gas with a fl ame temperature (5301° F) second only to acetylene.
	www.airgas.com /browse/product_list.aspx?catID=86 (116 words)

	Definition of methylacetylene - Merriam-Webster Online Dictionary (Site not responding. Last check: 2007-09-30)
		Click here to search for another word in the Merriam-Webster Online Dictionary.
		For More Information on "methylacetylene " go to Britannica.com
		Get the Top 10 Search Results for "methylacetylene "
	www.bonus.com /contour/merriam_webster/http@@/www.m-w.com/dictionary/methylacetylene (56 words)

	Publication List - Joseph S. Francisco
		Li Y. M.;Francisco, J. A CASSCF-MRCI study on the low-lying excited states of CH3OCl
		Li Y. M.;Francisco, J. State-averaged CASSCF and MRCI studies on the ground and low-lying singlet excited states of methylacetylene
		Li Y. M.;Francisco, J. A CASSCF-MRCI study of the electronic excited states of FClO and FOCl
	www.chem.purdue.edu /people/faculty/PubList.asp?faculty_id=32&offset=160 (347 words)

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