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Topic: Mesitylene

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	Method of making mesitylene - Patent 5087781
		Mesitylene (1,3,5 trimethylbenzene) is made by passing acetone in the vapor phase over a niobium catalyst.
		Mesitylene's symmetry and high reactivity (electrophilic substitutions are activated by the methyl groups) lead to the possibility of synthesizing specific derivatives such as polymethylaromatics, trimesic acid, hindered diamines, and other as described in U.S. Pat.
		These have boiling points close to that of mesitylene and it is expected that their separation from mesitylene will be difficult; therefore, they have to be minimized or selectively hydrogenated in order to obtain high purity mesitylene.
	www.freepatentsonline.com /5087781.html (1479 words)

	Separation of mesitylene from 4-ethyl toluene by azeotropic distillation - US Patent 6033529 (Site not responding. Last check: 2007-10-18)
		Mesitylene cannot be separated from 4-ethyl toluene by distillation because of the proximity of their boiling points.
		Mesitylene and 4-ethyl toluene boil only one degree apart and have a relative volatilty of 1.05 A process to separate these two would enhance their value as pure compounds.
		Analysis indicated a vapor composition of 93% mesitylene and 7% 4-ethyl toluene; a liquid composition of 87.5% mesitylene and 12.5% 4-ethyl toluene.
	www.patentstorm.us /patents/6033529.html (804 words)

	Organic Synthesis - Mesitylene (Site not responding. Last check: 2007-10-18)
		During this period a large proportion of the mesitylene distils and should be kept separate from the subsequent distillate.
		Upon cooling, mesitylene sulfonic acid crystallizes and the unsulfonated material remains as an oil on the surface.
		The connections on the apparatus, in which the mesitylene is obtained from the crude reaction mixture, should be tight, since the fumes evolved during the heating are very irritating.
	www.worldwideschool.com /library/books/sci/chemistry/OrganicSynthesis/chap11.html (1313 words)

	Pseudocumene and mesitylene production and coproduction thereof with xylene - Patent 5004854
		In the practice of the invention, a C9 alkylaromatic charge stream having the approximate composition shown in Table II is charged to reactor 8 and upgraded to pseudocumene, mesitylene, xylenes, and benzene over a shape-selective zeolite catalyst having a silica-to-alumina ratio of 1 to 12.
		An essential aspect of the invention is the use of a shape-selective catalyst for upgrading whereby labile C.sub.9 aromatics, such as propyl and methylethylbenzenes are selectively converted to xylene, toluene, benzene and small amounts of light gases without converting the trimethylbenzenes.
		Trimethylbenzenes are recovered in which the rati of psuedocumene to mesitylene is 5 to 1.
	www.freepatentsonline.com /5004854.html (3777 words)

	Method of making mesitylene - US Patent 5087781 (Site not responding. Last check: 2007-10-18)
		Method of making mesitylene comprising passing acetone over a niobium supported catalyst at a temperature of about 250° C. to about 500° C. Method of claim 1 wherein the catalyst support is silica.
		Calculated mesitylene selectivities were 61% and 70% for reaction temperatures of 300° C. and 400° C., respectively.
		Also, the undesirable C10s decrease by a factor 2 when the temperature is increased from 300° C. to 400° C. During the second period, the catalyst deactivated from 70% to 60% conversion after 92 hours of reaction.
	www.patentstorm.us /patents/5087781.html (1382 words)

	MESITYLENE (1,3,5-TRIMETHYL BENZENE)
		Mesitylene is the common name of 1,3,5-Trimethylbenzene (triply methylated benzene) occurring in petroleum and coal tar or converted from acetone on distillation with sulphuric acid.
		The 1,2,3- isomer is called Hemellitol (or Hemimellitene); 1,2,4- isomer is called Pseudocumene; 1,3,5- isomer is called Mesitylene (or Mesitelene).
		They are prepared from petroleum and coal tar and used as solvents for resins, gums, and nitrocellulose.
	www.chemicalland21.com /industrialchem/organic/MESITYLENE.htm (171 words)

	Mesitylene -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-18)
		In (The chemistry of compounds containing carbon (originally defined as the chemistry of substances produced by living organisms but now extended to substances synthesized artificially)) organic chemistry, mesitylene or 1,3,5-trimethylbenzene (C
		It is commonly used as a (A liquid substance capable of dissolving other substances) solvent in (Systematic investigation to establish facts) research and (The people or companies engaged in a particular kind of commercial enterprise) industry.
		Mesitylene is (Click link for more info and facts about flammable) flammable.
	www.absoluteastronomy.com /encyclopedia/M/Me/Mesitylene.htm (79 words)

	MESITYLENE ( 1,3,5 TRIMETHYL BENZENE) (Site not responding. Last check: 2007-10-18)
		Mesitylene is a solvent for paint and varnish formulations and an intermediate for the production of dyes, plastics, antioxidants, printing inks and certain pesticides.
		Mesitylene occurs naturally in coal tar and petroleum.
		Emissions from gasoline powered vehicles, waste treatment plants and coal fired power stations contain mesitylene.
	www.npt.gov.uk /html/environment/pollution/on-line/species/tb35.html (109 words)

	U.S. Pregrant 20040127762 - Process for the production of mesitylene and durene (Site not responding. Last check: 2007-10-18)
		A process is described for the contemporaneous preparation of mesitylene and durene, characterized in that mesitylene and durene are obtained exclusively starting from pseudo-cumene without the use of any further chemical compound, operating in continuous, at a temperature ranging from 210 to 400?
		C., at a pressure ranging from 1 to 50 bar, with a weight space velocity ranging from 0.1 to 20 hours?1 and in the presence of a catalyst based on crystalline metal-silicates in acid form.
		After the recovery of mesitylene and durene from the reaction raw product, some of the remaining components of the raw product itself are recycled and fed to the reactor together with the pseudo-cumene.
	cxp.paterra.com /uspregrant20040127762.html (214 words)

	Alkylation of Mesitylene (Site not responding. Last check: 2007-10-18)
		Adding 10 mL mesitylene to a very hot flask will bump it out of the condenser.
		Remember the paraformaldehyde doesn't all have to dissolve before adding mesitylene.
		Boiling stones can be added for smoother refluxing but they have to be tweezered out of the product later.
	ice.chem.umbc.edu /Chem352l/mesitylene.html (130 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		The reaction of mesitylene with dinitrogen tetroxide/Babak Sadigh.
		Research was carried out on the nitration of mesitylene using The reaction mixture was separated into two layers one containing nitrated products, the other containing phenolic products.
		There were further separated to analysis by analsis 'H NMR, 13C NMR and mass spectroscopy as well as C,H,N,O analysis.
	dbase.irandoc.ac.ir /00228/00228547.htm (63 words)

	IngentaConnect Laser flash photolysis detection of mono- and biradical mesitylen... (Site not responding. Last check: 2007-10-18)
		Time-resolved transient absorption spectra have been obtained first for mesitylene by 355 nm laser flash photolysis at ambient temperature.
		Mono- and biradicals were observed in the experiment, in which the transient absorption peak at about 370 nm was assigned to the biradical and the peak at about 580 nm to the monoradical; the biradical has a longer lifetime than the monoradical.
		You will be able to remove this item from your shopping cart at any time before you have completed check-out.
	www.ingentaconnect.com /content/vsp/rci/2004/00000030/00000003/art00007 (183 words)

	chap30 (Site not responding. Last check: 2007-10-18)
		Chapter 30 Procedure #1 Alkylation of Mesitylene to Dimesitylmethane (Macroscale)
		Heat the mixture for 5 minutes on the low setting until most of the paraformaldehyde has dissolved.
		Add through the top of the reflux condenser 10.0 ml of Mesitylene.
	members.aol.com /profchm/chap30.html (300 words)

	Sell Mesitylene or 1, 3, 5 Trimethyl Benzene (China (Mainland))
		Sell Mesitylene or 1, 3, 5 Trimethyl Benzene (China (Mainland))
		Sell Mesitylene or 1, 3, 5 Trimethyl Benzene
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	www.alibaba.com /trade/offer/detail/50698631.html (189 words)

	Harbin Billion Chemicals Ltd - mesitylene,fluorenone,adhesives,fine chemicals - EC Plaza
		BilnChem is mainly engaged in developing, manufacturing and marketing fine chemicals such as organic intermediates, and adhesives widely applied in the areas from civil product to aviation & aerospace industry.
		Our major fine chemicals are 1,3,5-trimethylbenzene (Mesitylene), 9-fluorenone, 2,4,6-Trimethylbenzoic acid (Mesitylenecarboxylic acid), High Temperature Energy-Saving Coatings, Catalyst For Pyromellitic Dianhydride, etc. Our adhesives & sealants are totally in near 200 varieties such as Structure Series, Auto Industry Series; Mechanical, Electronic and Chemical Industry Series; Decoration Series; Wood Series; Repairing Series; Shoe Making Series.
		The other products are Firing-Upward Coal Cake and Organic Fertilizer.
	richdad.en.ecplaza.net (285 words)

	U.S. Pregrant 20040225170 - Process for the production of mesitylene (Site not responding. Last check: 2007-10-18)
		U.S. Pregrant 20040225170 - Process for the production of mesitylene
		A process is described for the synthesis of mesitylene, characterized in that mesitylene is obtained starting exclusively from pseudocumene, without the use of any other chemical compound, operating in continuous, at a temperature ranging from 225 to 400?
		Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
	cxp.paterra.com /uspregrant20040225170.html (170 words)

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