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2,3-dimethyl pyrazine, 5910-89-4 - The Good Scents …

This mixture of gases is then passed over a bed of a in a form that encourages high selectivity towards alkenes with numbers of carbon atoms from 2 to 8. However, by using a zeolite treated with acid, almost all the alkene produced is propene, this being known as the MTP (Methanol To Propene) process (Figure 3, route 9). The propene is purified by cooling it to a liquid and then subjecting the liquid to fractional distillation.

2,5-dimethyl pyrazine, 123-32-0 - The Good Scents …

Although the principal use of bio-oil, produced by the of biomass, is as a fuel, it is also a promising source of chemicals. The bio-oil can be separated by distillation into two components, a lighter fraction and a heavier one (Figure 2, route 8). The lighter fraction can be catalytically cracked (Figure 2, route 11), in a similar way to the cracking of gas oil, to yield a gas, containing alkanes and alkenes and a naphtha-like liquid which can be steam cracked to yield ethene, propene and buta-1,3-diene (Figure 2, route 15). These are all major feedstocks for a variety of important chemicals.

3,3-DIMETHYL-2-BUTANOL, CAS Number: 464-07-3

The heavier fraction contains substituted phenols and aromatic oligomers (small polymers of 3-8 monomers) and on passing the liquid and their vapours over a heated catalyst in a a high concentration of aromatic hydrocarbons, benzene, methylbenzene (toluene) and the three methylbenzenes (xylenes), known as BTX, are recovered (Figure 2, route 10). Alternatively the vapours can be mixed with hydrogen and passed over a catalyst such as a cobalt- molybdenum sulphide on alumina.

Another way to produce propene is via methanol (produced from biomass via synthesis gas), which is an example of the MTO (Methanol To Olefins) process. (Olefin is the older name for the homologous series, alkenes). Methanol can be converted into high purity ethene and propene via dimethyl ether (Figure 3, routes 10 and 9). Methanol vapour is passed over alumina at ca 600 K. An equilibrium mixture of methanol, dimethyl ether and steam is produced, containing about 25% methanol:

3,3-dimethyl-1-phenyl-2-butanone | C12H16O - …

E. Bruneta; J.L. Garcia-Ruanoa; H. Rodriguezaa; F. Alcudia. Stereochemistry of organic sulphur compounds. part 14. Synthesis and conformation analysis of 1-thioderivatives of 3,3-dimethyl-2-butanol and its acetates. Tetrahedron. 1984, 40 (21), 4433-4445.

E. Bruneta; J.L. Garcia-Ruanoa; H. Rodriguezaa; F. Alcudia. Stereochemistry of organic sulphur compounds. part 14. Synthesis and conformation analysis of 1-thioderivatives of 3,3-dimethyl-2-butanol and its acetates. Tetrahedron. 1984, 40 (21), 4433-4445.

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3,3-Dimethyl-2-butanol 464-07-3 | Tokyo Chemical …

Bio-based ethene can be obtained by dehydration of bioethanol using a silica/alumina or alumina catalyst (Figure 3, route 6). The butenes (but-1-ene and but-2-ene) can be produced by either dehydration of (Figure 3, route 7) or by dimerization of bioethene (Figure 3, route 11).

Hoping To Synthesize 3,3-dimethyl-2-butanol ..

A mixture of ethene and butene is then heated and passed over a solid catalyst based on organic compounds of molybdenum(IV) and tungsten(IV) (the Schrock catalysts) and organo-ruthenium (II) compounds (the Grubbs’ catalysts), in a (Figure 3, route 13):

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