Abstract: A method for quenching cracked gases and recovery of heat therefrom by cooling the gases in heat exchange with steam to increase superheat level of the steam and subsequently recovering heat from the superheated steam.

Abstract: In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a "wet wall" or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor.

Abstract: Process is provided for producing ethylene by the oxidative dehydrogenation ethane wherein a gas containing ethane is passed to a first elongated reaction zone, and a gas mixture containing oxygen and chlorine is passed into a second elongated gas zone positioned along said first gas zone, said first and second gas zones being separated by a porous member. The pressure of gases within the second gas zone is maintained in excess of the pressure in the first gas zone for diffusion of the chlorine and oxygen through the porous member into the first gas zone. The first gas zone is maintained under conditions sufficient to effect reaction therein of at least a portion of diffused oxygen and chlorine with ethane for production of ethylene. The reaction product containing the desired ethylene is discharged from the first gas zone.

Abstract: Normal alpha-olefins containing minimum paraffin content are prepared from hydrocarbon wax streams by a process which comprisesPreheating a charge wax stock to thermal cracking temperature;Passing said charge wax stock during said preheating operation through the intermediate temperature range of 625.degree.-800.degree. F in a time less than about 8 seconds whereby the desired product contains a decreased proportion of paraffin impurities;Thermally cracking said preheated charge wax stock in vapor phase in the presence of steam at thermal cracking conditions thereby forming a product stream cracking effluent containing desired product n-alpha olefins containing 6-18 carbon atoms together with decreased proportion of paraffin impurities;Separating said desired product n-alpha olefins containing 6-18 carbon atoms from said product stream cracking effluent; andMaintaining the Severity Value of said product stream cracking effluent during said separating less than about 66.5.

Abstract: In the thermal cracking of a hydrocarbon feedstock, the quenching of the gases leaving the cracking zone is deliberately deferred for a very short time to permit continued endothermic reaction and thereby increase the ethylene yield.

Abstract: A process for improving a residual fuel derived from the distillation of petroleum crude includes originating a thermal shock by injecting water into residual fuel oil which has previously been heated to a temperature close to its boiling point, at a pressure equal to or slightly greater than atmospheric pressure, gas expansion being limited to the duration of the presence of water; and passing the gas formed as a result of the thermal shock to a gas expansion chamber, continuosly cooling the gas in a heat exchanger; and withdrawing the thereby liquified gas free from impurities.

Abstract: A process for upgrading a hydrocarbon fraction by contacting the hydrocarbon fraction with a dense-water-containing fluid at a temperature in the range of from about 600.degree. F. to about 900.degree. F. in the absence of an externally supplied catalyst and hydrogen and of pretreatment of the hydrocarbon fraction.

Abstract: A process for cracking thermoplastic polymers to valuable products, primarily their monomers, comprising the following steps:A. converting the polymer into a liquid or fluidized stage;B. introducing the polymer from step (a) in droplet or particulate form into a reaction zone and admixing said polymer with a hot inert gas or mixture of hot inert gases in the reaction zoneWherein the weight ratio of gas to polymer is about 1 to about 8 parts of gas per part of polymer; the temperature of the gas is such as to heat the polymer to a temperature in the range of about 800.degree.C. to about 1050.degree.C.; and the residence time in the reaction zone is about 10 to about 100 milliseconds; andC. quenching the recovering product.

Abstract: A process for producing a low sulfur content fuel oil in a high yield from a starting oil having a high sulfur content, which comprises (1) treating a residual petroleum oil with hydrogen at a temperature of about 350.degree. to 450.degree. C and a pressure of about 50 to 200 Kg/cm.sup.2 at a liquid hourly space velocity of about 0.2 to 4 l/H.l in the presence of a catalyst, (2) introducing an inert gas or steam at a temperature of about 400.degree. to 900.degree.C and pyrolyzing the treated oil at a temperature of about 350.degree. to 500.degree.C and at a pressure of about atmospheric pressure to 100 Kg/cm.sup.2 with a residence time of about 0.5 to 10 hours, and (3) hydrodesulfurizing the pyrolyzed oil at a temperature of about 300.degree. to 400.degree.C and a pressure of about 30 to 100 Kg/cm.sup.2 at a liquid hourly space velocity of about 0.5 to 4 l/H.l in the presence of a desulfurizing catalyst.

Abstract: A process for cracking hydrocarbon feedstocks comprising introducing a mixture of feedstock and hot gas into a reactor in which cracking temperatures are maintained, said reactor comprising;A. a hollow cylindrical tube having (i) a first end closure and a second end closure, at least one of said end closures being provided with an orifice disposed substantially centrally therein; and (ii) at least one hollow inlet feed chamber open at both ends passing through the cylindrical surface described by tube (A), one end of such feed chamber being disposed in the interior of tube (A) at about its periphery in such a manner that vapor, which is passed through said chamber, will flow substantially tangentially to the inner surface described by cylindrical tube (A), provided that the rate of flow is sufficient therefor, creating a vortex-like flow within tube (A); andB. at least one hollow tube open at both ends;Wherein:A.

Abstract: High grade cokes are produced by a simple expedient such that a raw material oil is charged into a coking drum and is subjected therein to a two step operation, namely reforming of the oil and subsequent coking under bubbling into the oil of a heated non-oxidizing gas. No fluidized bed of the oil to be coked is formed.

Abstract: In producing cracked gas and cracked oil by thermally cracking a heavy hydrocarbon within a reactor in which a granular solid, steam and oxygen form a fluidized bed or moving bed, a process which is characterized in that the heavy hydrocarbon is supplied to the upper portion of the reactor and part of the granular solid is discharged from the bottom of the reactor and thereafter fed again to the upper portion of the reactor, to thereby maintain the upper portion at a temperature of not higher than 550.degree.C.