Abstract: Pure 1,4-dienes are produced at high rates of reaction by reacting a conjugated diene and an alpha monoolefin at a temperature below 70.degree. C. in the presence of a catalyst consisting essentially of a 1,3-bis(diphenylphosphino)propane ligand of Co(II)(acetylacetonate).sub.2 or Co(III)(acetylacetonate).sub.3 or CoCl.sub.2 in combination with a dialkylaluminum halide such as diethylaluminum chloride.

Abstract: Inhibition of popcorn polymer growth by treatment with heat. Heat can be applied to extant popcorn polymer, particularly in the absence of organic material from which the popcorn polymer is formed. A chemical inhibitor of popcorn polymerization can be used in conjunction with the heat treatment.

Abstract: Disclosed is a process for removing hydrogenation by-products which comprises the use of an extractive distillation tower operated in combination with a solvent stripper, hydrocarbon purge and a water wash column. By the arrangement of the various feeds to and between the above mentioned, the green oil may be extracted away from desirable hydrocarbons.

Abstract: Disclosed is a process for removing hydrogenation by-products which comprises the use of an extractive distillation tower operated in combination with a solvent stripper, hydrocarbon purge and a water wash column. By the arrangement of the various feeds to and between the above mentioned, the green oil may be extracted away from desirable hydrocarbons.

Abstract: The present invention is directed to a process for producing dienes which involves reacting a reaction mixture of tertiary alkyl ether and a source of oxygen over two functionally distinct catalysts under reaction conditions sufficient to produce high yields of the dienes with minimal recycle of the ether. The two functionally different catalysts are selected from a group of bifunctional catalysts having both oxidation sites and acidic sites and monofunctional acidic catalysts, such as bifunctional catalysts containing components selected from a group of oxides of vanadium, tungsten, molybdenum, copper, iron, chromium, and uranium and mixtures thereof; and monofuctional acid catalysts such as acid treated montmorillonite clays, and acid catalysts comprising an inorganic amorphous or substantially amorphous oxide material comprising the following components reacted therein:M.sup.1 /M.sup.2 /P/Owherein M.sup.1 is at least one Group IIIB element selected from the group consisting of Al, Ga, In and Tl; M.sup.