Dehydrocoupling of toluene

Details Dehydrocoupling of toluene Dehydrocoupling of toluene

C - Chemistry, Metallurgy

07

C

260/681.4

C07C 15/52 (2006.01)

Patent

CA 1139321

20-21-0143A DEHYDROCOUPLING OF TOLUENE ABSTRACT OF THE DISCLOSURE Toluene dehydrocoupled products are produced by heating toluene in the vapor phase with an inorganic metal/ oxygen composition which functions as an oxygen carrier and has the empirical formula: Image where M1 is at least one element selected from silver, zinc, gallium, indium, thallium, germanium, phosphorus, arsenic, thorium, the lanthanides, Groups 1a, 2a, 3b, 4b, and 8 of the Periodic Table of the Elements, and mixtures thereof, and M2 is an element selected from bismuth and antimony, and wherein a is 0.01 to 10, b is 0 to 10, and x is a num- ber taken to satisfy the average valences of lead, M1 and M2 in the oxidation states in which they exist in the com- position to yield the toluene dehydrocoupled toluene pro- duct, with the proviso that when M2 is bismuth, M1 cannot be gallium or thallium; and when M2 is antimony, M1 can- not be indium, thallium, germanium, phosphorus, or thorium. Alternatively, the same inorganic metal/oxygen composition can be employed as a catalyst or as a combination catalyst/ oxygen carrier for the dehydrocoupling reaction when oxy- gen or an oxygen-containing gas is heated with the toluene.

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