The invention relates to the use of esters of volatile fatty acids, such esters having a number of carbon atoms between 4 and 8, in a fuel for a petrol engine in order to reduce the emissions of nitrogen oxides, unburned hydrocarbons and particles of petrol engines.

The present disclosure provides petrochemical processing methods and systems, including ethylene conversion processes and systems, for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compounds, with reduced amount of unsaturated hydrocarbons.

The present disclosure provides petrochemical processing methods and systems, including ethylene conversion processes and systems, for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compounds, with reduced amount of unsaturated hydrocarbons.

The present application provides a one-step refining process of a hydrocarbon feedstock, said process comprising heating said hydrocarbon feedstock with one or more fatty acids or mixtures thereof, at a temperature below 350 C., to obtain a light hydrocarbon product, wherein said light hydrocarbon product obtained in said process contains no heavy hydrocarbons products.

The present application provides a one-step refining process of a hydrocarbon feedstock, said process comprising heating said hydrocarbon feedstock with one or more fatty acids or mixtures thereof, at a temperature below 350 C., to obtain a light hydrocarbon product, wherein said light hydrocarbon product obtained in said process contains no heavy hydrocarbons products.

Disclosed is a process for producing mixed xylenes and C.sub.9+ hydrocarbons in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating agent comprising methanol and/or dimethyl ether under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product stream comprising the mixed xylenes and C.sub.9+ hydrocarbons. The mixed xylenes are subsequently converted to para-xylene, and the C.sub.9+ hydrocarbons and its components may be supplied as motor fuels blending components. The alkylation catalyst comprises a molecular sieve having a Constraint Index in the range from greater than zero up to about 3. The molar ratio of aromatic hydrocarbon to alkylating agent is in the range of greater than 1:1 to less than 4:1.

The present application relates to a process for treating gasoline, comprising the steps of: contacting a gasoline feedstock with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a desulfurization-aromatization product; optionally, splitting the resulting desulfurization-aromatization product into a light gasoline fraction and a heavy gasoline fraction; and, optionally, subjecting the resulting light gasoline fraction to etherification to obtain an etherified oil; wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst. The process of the present application is capable of reducing the sulfur and olefin content of gasoline and at the same time increasing the octane number of the gasoline while maintaining a high yield of gasoline.

The present application relates to a process for treating gasoline, comprising the steps of: contacting a gasoline feedstock with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a desulfurization-aromatization product; optionally, splitting the resulting desulfurization-aromatization product into a light gasoline fraction and a heavy gasoline fraction; and, optionally, subjecting the resulting light gasoline fraction to etherification to obtain an etherified oil; wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst. The process of the present application is capable of reducing the sulfur and olefin content of gasoline and at the same time increasing the octane number of the gasoline while maintaining a high yield of gasoline.

A method and chemical composition used to reduce sulfur content in bunker fuel or crude oil comprising: poly acrylonitrile, rnesophase pitch, zinc, acid and lignin.

A method and chemical composition used to reduce sulfur content in bunker fuel or crude oil comprising: poly acrylonitrile, rnesophase pitch, zinc, acid and lignin.