NOVELTY - A thermal method for treating crushed hydrocarbonaceous solids to extract hydrocarbons, comprises preheating a crushed hydrocarbonaceous solids; treating the preheated crushed solids in a horizontal rotary kiln with a hot gas at an elevated temperature and an injected hydrocarbon to produce vaporized hydrocarbon materials, enriched gas and spent solids; and removing the vaporized hydrocarbon materials, enriched gas and spent solids from the kiln.    USE - For treating crushed hydrocarbonaceous solids to extract hydrocarbons.    ADVANTAGE - The inventive method is efficient for extracting oil and other valuable hydrocarbons from crushed hydrocarbonaceous solids, e.g. oil shale. It provides unique synergies to facilitate the economical production of various products from the hydrocarbonaceous solids. It provides an extraction process that could utilize equipment now in commercial use, meet present day Environmental Protection Agency (EPA) standards and could be rapidly put into commercial production to meet the urgent demand for various hydrocarbon products. It facilitates a unique combination of the two techniques of coal gasification and the utilization of the syn gas directly in the oil shale extraction process. In addition, the use of the special hydrogen and carbon dioxide-containing hot gas effects an upgrading of the products as to yield and quality, e.g. 5 to 25% increase in yield of light ends, e.g. gasoline and lighter fractions, and thus presents a desirable economic advantage. Further, gas produced in the process may be used for the production of electricity in a combined-cycle power generation step. This reduces the need for off-site electrical power and minimizes burning to reduce atmospheric emissions of harmful gases to well below EPA standards. The inventive method provides lower heat requirement during the reaction in the rotary kiln, as well as improved yield. Further, there would be no need for building expensive dams and other water collection projects prior to the operation of the process. In addition, the process utilizes equipment now in commercial production and does not require specially produced equipment that may require long periods of time for construction. Finally, the process presents an additional economic advantage in that the oil vaporized off the oil shale will be in vapor form and can be sent directly to a fractionating tower for refining, thus eliminating the expense of reheating the hydrocarbons for fractionation.    DETAILED DESCRIPTION - A thermal method for treating crushed hydrocarbonaceous solids to extract hydrocarbons, comprises preheating a crushed hydrocarbonaceous solids; treating the preheated crushed hydrocarbonaceous solids in a horizontal rotary kiln having an upper end and a slight slope downward with: a hot gas at an elevated temperature, and an injected hydrocarbon that vaporized and mixes with the hot gas, where pressure inside the rotary kiln is greater than atmospheric pressure and the crushed solids are introduced at the upper end of the rotary kiln and cascade into the hot gas for adequate time to vaporize volatile components from the crushed solids to produce vaporized hydrocarbon materials, enriched gas and spent solids; and removing the vaporized hydrocarbon materials, enriched gas, and spent solids from the rotary kiln. An INDEPENDENT CLAIM is also included for a system for extracting hydrocarbons from hydrocarbonaceous solids, comprising a horizontal rotary kiln having an upper end and a slight slope downward to a lower end and having a crushed hydrocarbonaceous solids source operatively connected to the upper end; a hot gas source operatively connected to either the upper end or the lower end; a liquid hydrocarbon source operatively connected to either the upper end or the lower end; and a separation chamber operatively connected to a lower end of the rotary kiln.