Abstract: A process is described for the recovery of net power during the depressurization of natural gas from high pressure pipeline conditions to low pressure end user conditions wherein the natural gas is rewarmed to a relatively warm temperature greater than 35.degree. F. using renewable energy and ambient atmosphere.

Abstract: In this invention, a process is disclosed characterized by heating a slurry of coal in the presence of a process-derived recycle solvent and passing same to a dissolver zone, separating the resultant gases and liquid/solid products therefrom, vacuum distilling the liquid/solids products, separating the portions of the liquid/solids vacuum distillation effluent into a solid ash, unconverted coal particles and SRC material having a boiling point above 850.degree. F. and subjecting same to a critical solvent deashing step to provide an ash-free SRC product. The lighter liquid products from the vacuum distillation possess a boiling point below 850.degree. F. and are passed through a distillation tower, from which recycled solvent is recovered in addition to light distillate boiling below 400.degree. F. (overhead).

Abstract: This invention relates to an improved process for the production of liquid carbonaceous fuels and solvents from carbonaceous solid fuels, especially coal.The claimed improved process includes the hydrocracking of the light SRC mixed with a suitable hydrocracker solvent. The recycle of the resulting hydrocracked product, after separation and distillation, is used to produce a solvent for the hydrocracking of the light solvent refined coal.

Abstract: An improved SRC-I two-stage coal liquefaction process which improves the product slate is provided. Substantially all of the net yield of 650.degree.-850.degree. F. heavy distillate from the LC-Finer is combined with the SRC process solvent, substantially all of the net 400.degree.-650.degree. F. middle distillate from the SRC section is combined with the hydrocracker solvent in the LC-Finer, and the initial boiling point of the SRC process solvent is increased sufficiently high to produce a net yield of 650.degree.-850.degree. F. heavy distillate of zero for the two-stage liquefaction process.

Abstract: A pumpable slurry of pulverized coal in a coal-derived hydrocarbon oil carrier which slurry is useful as a low-ash, low-sulfur clean fuel, is produced from a high sulfur-containing coal. The initial pulverized coal is separated by gravity differentiation into (1) a high density refuse fraction containing the major portion of non-coal mineral products and sulfur, (2) a lowest density fraction of low sulfur content and (3) a middlings fraction of intermediate sulfur and ash content. The refuse fraction (1) is gasified by partial combustion producing a crude gas product from which a hydrogen stream is separated for use in hydrogenative liquefaction of the middlings fraction (3). The lowest density fraction (2) is mixed with the liquefied coal product to provide the desired fuel slurry. Preferably there is also separately recovered from the coal liquefaction LPG and pipeline gas.

Abstract: Process for converting a relatively high boiling point crude oil fraction, such as a 500.degree.+F. initial boiling point topped crude to synthetic natural gas. In the process, a lower boiling point fraction of the feedstock is hydrogasified while a residual oil fraction of the feedstock is partially oxidized to produce hydrogen for use in the process. A mid-cut fraction between the gasification fraction and the partial oxidation fraction is converted in a combined steam reforming-methanation stage, along with some by-product aromatics, to produce additional synthetic natural gas products.

Abstract: An upgraded benzene-synthetic natural gas product is produced from hydrocarbon gas condensate feedstock by catalytically reforming a C.sub.6 -300.degree. F. B.P. fraction and hydrogasifying the remainder of the feedstock. The overall efficiency of the process is enhanced by dealkylation of certain intermediate streams in the process and by recycling certain other aromatic and hydrogen-rich streams within the process.

Abstract: A cyclic process for the separation of water and carbon dioxide contaminants from a feed gas stream by adsorption on molecular sieve adsorbents and the subsequent regeneration of the adsorbents is disclosed. Adsorption of the water and CO.sub.2 contaminants is accomplished by passing the feed gas stream through first and second adsorbent zones, containing molecular sieve adsorbents. Water is adsorbed in the first zone and the carbon dioxide is adsorbed primarily in the second zone. Regeneration of the adsorbent zones is accomplished by the sequential steps of:(1) introducing a heated regeneration gas intemediate the first and second adsorbent zone and passing the heated regeneration gas through the first adsorbent zone in a countercurrent direction until the regeneration gas exiting the first adsorbent zone reaches approximately 250.degree. F. to 350.degree. F.