NOVELTY - Producing hydrocarbons from a carbon containing material, comprises: (i) finely dividing a carbon-containing material; (ii) adding a mixture of catalyst to the material; (iii) heating the obtained hydrocarbon mixture of step (ii) in an anaerobic environment; (iv) condensing vapors of the hydrocarbon gas obtained at step (iii) to obtain a hydrocarbon oil in liquid state; (v) recovering and recycling the uncondensed hydrocarbon gas of step (iv) into furnace; and (vi) separating a residual char and an inorganic material from the hydrocarbon mixture of step (iii).    USE - The methods are useful for: producing hydrocarbons from a carbon containing material, where the carbon containing materials are hydrocarbon wastes, biomass, waste including plastic waste, electronic waste, agricultural waste, mine waste, old rags, old tires, waste paper, used batteries, animal waste and/or human waste; and de-sulfurization of crude hydrocarbon oil (all claimed), which is useful as fuel.    ADVANTAGE - The method is safe and cost-effective, and provides hydrocarbons in an environmentally friendly manner. The fuel produced is substantially sulfur free.    DETAILED DESCRIPTION - Producing hydrocarbons from a carbon containing material, comprises: (i) finely dividing a carbon-containing material; (ii) adding a mixture of catalyst to the material of step (i) to obtain a hydrocarbon mixture; (iii) heating the hydrocarbon mixture of step (ii) in an anaerobic environment for at least 15 minutes to 1 hour resulting in emission of a hydrocarbon gas; (iv) condensing vapors of the hydrocarbon gas obtained at step (iii) to obtain a hydrocarbon oil in liquid state; (v) recovering and recycling the uncondensed hydrocarbon gas of step (iv) into furnace; and (vi) separating a residual char and an inorganic material from the hydrocarbon mixture of step (iii). An INDEPENDENT CLAIM is included for a method-1 of de-sulfurization of crude hydrocarbon oil, comprising (ia) mixing crude hydrocarbon oil with benzene, to form a mixture, (iia) subjecting the mixture of step (ia) to elevated temperature of 50-110 degrees C under total reflux of benzene, (iiia) heating a mixture of catalyst comprising finely divided zinc and finely divided iron separately for 1 hour, (iva) adding a portion of the heated catalyst mixture (203) to the mixture of crude hydrocarbon oil and benzene, (va) heating the mixture at 50-110 degrees C under total benzene reflux, (via) creating a catalyst bed using the catalyst mixture, (viia) pouring the mixture of step (va) over the catalyst bed and subjecting to filtration under vacuum, and (viiia) optionally subjecting the mixture of step (viia) to distillation to remove benzene under vacuum to obtain crude oil with sulfur content of not more than 0.1%.    DESCRIPTION OF DRAWING(S) - The figure shows a diagrammatic representation of the method of producing hydrocarbons from a carbon containing material.    Catalyst mixture (203)    Combustion of natural gas (204)    Air (205)    Anaerobic reactor (207)    Pipe. (208)