Chemische Reaktionen in Salzschmelzen, VI<sup>1)</sup> Zur Darstellung des Vinylchlorids

Sundermeyer, W.; Glemser, Oskar; Kleine‐Weischede, K.

doi:10.1002/cber.19620950739

Cited by 14 publications

(1 citation statement)

References 2 publications

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“…Much of this work deals with organic reactions with particular emphasis on the silanes. Molten LiCI-AICl a , (271) NaCl-AICl a , (272,273) KCI-ZnCI 2 , (272,(274)(275)(276) LiCI-KCI eutectic, (277)(278)(279) and LiF-NaF-KF eutectiC<28o,281) were used as solvents. These authors point out that fused salts are particularly well suited as media for organic reactions.…”

Section: Technological Applicationsmentioning

confidence: 99%

Advances in Molten Salt Chemistry

1971

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FOREWORDMolten salts are investigated by very diverse techniques and for differing purposes, and the results are reported in widely scattered journals. There is a need to keep investigators aware of progress in other specialties and to provide students with source and background material. Advances in Molten Salt Chemistry hopes to fill these needs by providing reviews of recent progress presented, insofar as is reasonable, with enough background material and commentary to be comprehensible to a nonspecialist. We prefer a discussion of underlying principles, to the extent that they are known, and we encourage authors to comment critically on the reliability of data, the utility of models, and the cogency of ideas and theories.We take a broad vie~ of the suitability of topics for inclusion in this series. Both fundamental and technological advances have a place here, as do studies on materials related to molten salts (like liquid silicates, very concentrated aqueous solutions, solutions of salts in liquid metals, and solid electrolytes).We intend this series to serve the needs of those who investigate or use molten salts. We welcome suggestions of topics and suitable authors, as well as comments on the strengths and shortcomings of what is published.vii

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Section: Technological Applicationsmentioning

confidence: 99%

Advances in Molten Salt Chemistry

1971

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2010

Solvents and Solvent Effects in Organic Chemistry

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Partial oxidation of o‐xylene in melts containing vanadium pentoxide

Satterfield

Loftus

1965

AIChE Journal

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o-Xylene vapor in nitrogen was partially oxidized by bubbling it through a melt of the 39 wt. % vanadium pentoxide-potassium sulfate eutectic a t temperatures from 528" to 598°C. The principal product was o-tolualdehyde; some benzene and traces of phthalide were formed but no organic acids. These products are similar t o those found in o-xylene oxidation over a solid vanadium oxide catalyst, except for the absence of acid products but are far different from the product distribution found from homogeneous oxidation with air. The rate of reaction per unit of gas-melt interface was approximately equal to that reported for oxidation of o-xylene in air on an unsupported fused vanadium oxide catalyst. With o-xylene-air mixtures bubbled through either a vanadium pentoxide-potussium sulfate eutectic melt or vanadium pentoxidepotassium pyrorulfate melt, homogeneous reaction obscured any contribution from heterogeneous processes.In present chemical technology, catalyzed gas-phase reactions are usually carried out in either fixed-or fluidized-bed reactors. With highly exothermic or endothermic reactions, isothermal operation is difficult to achieve in a fixed-bed reactor because of the poor radial heat transfer. In a fluidized bed essentially isothermal operation can be achieved, but the flow patterns and residence times of solids and gas are understood poorly. The purpose of this work was to explore a different contacting method, that of passing the reactant gas in the form of bubbles up through a vessel containing a melt which would act as an oxidizing agent or as a catalyst. In addition to providing a more nearly isothermal operation than the fixed-bed reactor, a melt reactor system may permit new methods of carrying out a catalytic reaction. For example, in a catalytic oxidation it may be possible to achieve more selective reaction and minimize overoxidation by not allowing the reactant to come in contact with the primary oxidant. By proper choice of a suitable melt, the reactants may be oxidized by the melt in one reactor, and the reduced melt reoxidized by a second gas stream, such as air in a second reactor, and then be recirculated to the first. The high catalytic activity of many metal oxides has been attributed to the ease with which they may alternate between two oxidation states. That of a solid vanadium pentoxide catalyst in o-xylene oxidation, for example, has been ascribed to a V,O,-V,O,, oxidation-reduction system (18).

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Chemische Reaktionen in Salzschmelzen, VI¹⁾ Zur Darstellung des Vinylchlorids

Cited by 14 publications

References 2 publications

Advances in Molten Salt Chemistry

Advances in Molten Salt Chemistry

References

Partial oxidation of o‐xylene in melts containing vanadium pentoxide

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Chemische Reaktionen in Salzschmelzen, VI1) Zur Darstellung des Vinylchlorids

Cited by 14 publications

References 2 publications

Advances in Molten Salt Chemistry

Advances in Molten Salt Chemistry

References

Partial oxidation of o‐xylene in melts containing vanadium pentoxide

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Chemische Reaktionen in Salzschmelzen, VI¹⁾ Zur Darstellung des Vinylchlorids