Abstract: A process for reducing the pyritic sulfur content of coal comprising:(1) contacting coal particles with an aqueous solution of iron complexing agent, and an oxidant; and;(2) recovering coal particles of reduced sulfur content.

Abstract: A process for reducing the sulfur content of coal comprising the steps of:(1) contacting coal particles with an aqueous solution of compositions selected from the group comprising alkali metal and alkaline earth metal sulfites and bisulfites to reduce the sulfur content of the coal; and(2) recovering coal particles of reduced sulfur content.

Abstract: A process for reducing the sulfur content of coal comprising the steps of:(1) contacting coal particles with a silicate selected from the group consisting of alkali metal silicates, alkaline earth metal silicates and mixtures thereof in an aqueous medium to reduce the sulfur content of the coal; and(2) recovering coal particles of reduced sulfur content.

Abstract: A process for reducing the sulfur content of coal comprising the steps of:(1) contacting coal particles with an aqueous solution of iron complexing agent, and an oxidant to preferentially oxidize at least a portion of the sulfur in the coal;(2) contacting the oxidized sulfur-containing coal with at least one hydrogen donor material capable of transferring hydrogen to the oxidized sulfur-containing coal under conditions such that hydrogen transfer occurs; and(3) recovering coal products of reduced sulfur content.

Abstract: A process for reducing the sulfur content of coal comprising the steps of:1. contacting coal particles with an aqueous solution of iron complexing agent, and an oxidant to preferentially oxidize at least a portion of the sulfur in the coal;2. thermally treating the oxidized sulfur-containing coal at elevated temperature to reduce the sulfur content of the coal; and3. recovering coal particles of reduced sulfur content.

Abstract: The disclosure is of compounds of the formula: ##EQU1## WHEREIN R is aliphatic hydrocarbon, X is sulfur (S) or carbon (C) and n is an integer of 1 to 3. The compounds are useful as easily-storable, polyisocyanate generators, especially the essentially-chlorine free compounds.

Abstract: Cyclic nitrile carbonate group-containing chloroformate of the general formula: ##EQU1## is condensed with polyfunctional nucleophilic compound of the general formula:HT-Y TH].sub.x ,wherein R is an aliphatic hydrocarbon, T is O, S or NR', wherein R' is hydrogen or an essentially hydrocarbonaceous group, Y consists essentially of carbon and hydrogen, and x is 1 to 3, to yield hydrogen chloride as the elimination product and cyclic nitrile carbonate group-containing condensate of the general formula: ##EQU2## AS THE ADDITION PRODUCT. The addition product is useful as, inter alia, a precursor for a carbonate, urethane or thiocarbonate group-containing polyurethane, polyurea, or polythiourethane, these polymers being in turn useful in coating, molding, adhesive, and the like compositions.