Abstract:
A method is disclosed for the pretreatment of olefinic hydrocarbon feedstock to remove conjugated dienes and/or basic nitrogen compounds that deactivate acidic catalyst particles used in olefin conversion processes by reacting the dienes with one or more dienophiles to form the corresponding Diels-Alder adduct, followed by catalytic conversion of the olefinic hydrocarbon feedstock containing the adduct. The formation of the Diels-Alder adduct essentially eliminates the role of dienes in the feedstock as catalyst deactivating agents. When maleic anhydride (MA) is employed as the dienophile, basic nitrogen reacts with maleic anhydride, or with the tetrahydrophthalic anhydride adduct, to lower the amount of catalyst deactivating basic nitrogen compounds in the feedstock. Where the olefin conversion process comprises etherification of isoolefins with alkanol in a C.sub.4 + or C.sub.5 + olefinic hydrocarbon feedstream to produce a gasoline boiling range product enriched in oxygen and rich in high octane value alkyl tertiary alkyl ethers, it has been discovered that the adduct, particularly those adducts formed with MA, is in the gasoline boiling range and contributes usefully to the oxygen enrichment of the gasoline and to octane value.
Abstract:
Microorganism induced corrosion of storage vessels which contain a heel of water and an upper layer of hydrocarbon liquid may be prevented by adding to the hydrocarbon liquid contained in such storage vessels a water-dispersible polyvinyl alcohol package which contains a microbiocide.
Abstract:
1-Bromopinacolone is a microbial biocide that is highly effective in suppressing the growth of bacteria, fungi and algae which can occur during storage and use of hydrocarbon oils including gasoline, jet fuel and heating oil. It is particularly effective in emulsifiable oils for metal working, such as cutting oils and rolling oils.