Elf Exploration Production

Societe Nationale Elf Aquitaine (production)

Elf Aquitaine Production

Societe Nationale Elf Aquitaine

Total Sa

Air Liquide Global E&c Solutions Germany Gmbh

Ngd Consult

Elf Aquitaine Productiion

Jean Nougayrede

Andre Philippe

Georges Kvasnikoff

Sabine Savin-Poncet

Marc J Ledoux

Claude Crouzet

Cuong Pham-Huu

Nicolas Keller

Wolfgang Nehb

Eckhard Juengst

Soufiene Maktouf

Andr&eacute; Philippe

Cuong Pham Huu

Eckhard Jüngst

Embodiments of the invention include a method for degassing liquid sulphur in a container, a first area of the container being flooded with liquid sulphur and a second area of the container being flooded with a gas, and a gas flow being injected into the first area, wherein liquid sulphur is sprayed into the second area. Embodiments of the invention include a device for degassing liquid sulphur having a container comprising two adjacent areas, the first area being flooded with liquid sulphur and the second area being flooded with gas, and having at least one device for injecting a gas flow into the first area, characterized by a device for spraying liquid sulphur opening into the second area. Other embodiments are also included herein.

Method and device for degassing liquid sulphur

A process for advantageously efficiently treating a sulfureous combustible effluent stream by recovering the sulfur in elemental form comprises a step of combustion of the sulfureous combustible effluent stream with an oxidant gas in excess, and then a step of post-combustion of the effluents from the combustion step with an acidic gas. The stream of the post-combustion effluents, free of chemical compounds that are harmful to the efficacy of the Claus catalysts, is treated in a Claus unit, which performs the recovery of the sulfur in elemental form.

Staged combustion of sulfureous combustible effluents with recovery of the sulfur in the claus process

A process is provided to recover residual H S, SO , COS and CS in the tail gas from a sulphur recovery process. The tail gas is oxidized and hydrolyzed at a temperature of from 180&deg; C. to 700&deg; C. to provide an oxidized and hydrolyzed gas stream containing substantially no COS or CS and having a concentration by volume of H S and SO such that the H S concentration minus twice the SO concentration is from 0.25% to 0.5%. Then the gas stream from the hydrolysis is passed over a Claus catalyst, for example based on alumina and/or titanium oxide, for the reaction of H S with SO to form sulphur and provide a gas stream with substantially no SO . The resulting gas stream from the Claus reaction together with a gas containing free oxygen is then passed over an oxidation catalyst, such as one of more oxides or salts of Ni, Co, Fe, Cu, Ag, Mn, Mo, Cr, W or V, deposited on a support, such as bauxite, activated aluminia, silica, titanium oxide, zirconium oxide, zeolite or activated carbon to form sulphur and release a purified gas stream containing substantially no sulphur compounds.

Process for recovering as sulfur the compounds H2S, SO2, COS and/or CS2 in a tail gas from a sulfur plant

A process for catalytically oxidizing H S contained in a gas directly to sulphur containing the following steps: combining the H S-containing gas with a gas containing free oxygen in an amount to produce an oxygen-enriched H S-containing gas having O /H S molar ratio ranging from about 0.05 to about 15; and contacting the oxygen-enriched H S-containing gas with a catalyst for selective oxidation of H S to sulphur, wherein the catalyst includes a catalytically active phase combined with a silicon carbide-based support and wherein the active phase of the catalyst consists of at least one oxysulphide of at least one metal selected from the group consisting of iron, copper, nickel, cobalt, chromium, molybdenum and tungsten, at a temperature above the dew point of sulphur formed during H S oxidation.

Process for oxidizing the H2S contained at low concentration in a gas directly to sulphur by catalytic means and in the vapour pause

Process for removing sulfur compounds out of a gas

Method and catalyst for catalytically oxidizing a low concentration of

Catalytic desulphurization process for a gas containing H.sub.2 S and

Process for oxidation of H.sub.2 S to sulphur

Removal of sulfur compounds in claus type residual gases with sulfur

A process is provided for the production of sulphur from at least one sour gas containing H.sub.2 S and a gaseous or liquid fuel effluent, of the type comprising a thermal reaction step, wherein the thermal reaction step is conducted by performing the combustion of the gaseous or liquid fuel effluent in a first zone of the thermal reaction stage with a quantity of a gas containing free oxygen in excess in relation to the theoretical quantity needed for a complete combustion of the fuel effluent, the excess being smaller than the theoretical proportion of gas containing free oxygen needed to oxidize to SO.sub.2 approximately one third of the H.sub.2 S of the total flow of sour gas into the combustion fumes of the fuel effluent which are present in the first zone of the thermal reaction stage, by burning incompletely a second stream of sour gas in a second zone of the thermal reaction stage, which receives the gaseous products from the first zone, with a controlled quantity of gas containing free oxygen, such that the H.sub.2 S:SO.sub.2 molar ratio in the gases originating from the catalytic reaction step has a predetermined value, and by adjusting the flow rates of the first and second sour gas streams so that the temperature obtained during the incomplete combustion of the second sour gas stream in the second zone of the thermal reaction stage has a value higher than 850.degree. C.

Process for the production of sulphur from at least one sour gas

A process is provided for the improvement of the sulphur yield of an assembly which produces sulphur from H.sub.2 S and which consists of a sulphur plant (1), an oxidation and hydrolysis unit (2) and a purification unit (3). The sulphur plant in producing sulphur provides a residual gas which incorporates H.sub.2 O, COS and/or CS.sub.2 and H.sub.2 S and SO.sub.2 in a mol ratio of H.sub.2 S:SO.sub.2 &gt;2:1. The residual gas passes into the hydrolysis unit on a H.sub.2 S oxidation and COS and CS.sub.2 hydrolysis catalyst which functions between 180.degree. C. and 700.degree. C., in the presence of air, thus producing a residual gas free of COS and CS and incorporating H.sub.2 S and SO.sub.2 in a mol ratio which is kept equal to 2:1 by regulating the air flow. The residual gas is introduced into the purification unit in which H.sub.2 S and SO.sub.2 are made to react in order to produce sulphur and to obtain a purified residual gas.

Process for improving the sulphur yield of a complex for producing

Process for removing sulphur-containing compounds from a residual gas with recovery of said compounds in the form of sulphur, wherein the residual gas is subjected to a treatment comprising a hydrogenation and a hydrolysis phase to provide the sulphur-containing compounds in the unique form of H.sub.2 S, a cooling step with water condensation, a catalytic oxidation of H.sub.2 S in CLAUS stoechiometry and a catalytic CLAUS reaction phase with deposition of sulphur on the CLAUS catalyst and periodic regeneration of the sulphur-laden catalyst and cooling of the regenerated catalyst. The gas used for the regeneration and for the cooling is tapped from the gas effluent supplied to the catalytic oxidation and the gas issued from the regeneration is reintroduced at least in part into said gas effluent after separation of the sulphur containing therein. Application to the purification of residual gases issued from CLAUS sulphur units.

Process for removing sulphur compounds from a residual gas

Process for removing sulfur compounds contained in a residual gas with recovery of said compounds in the form of sulfur, wherein a gas obtained from a residual gas containing H.sub.s S and SO.sub.2 and having a temperature lower than 160.degree. C. is subjected to a catalytic CLAUS reaction phase with deposition of sulfur on the catalyst and periodic regeneration of the sulfur-laden catalyst and cooling of the regenerated catalyst. The gas brought in contact with the CLAUS catalyst is produced by subjecting the residual gas to a hydrogenation and hydrolysis treatment to provide the sulfur compounds in the unique form of H.sub.2 S and to cooling with water separation by condensation and then to catalytic oxidation of H.sub.2 S in CLAUS stoichiometry with cooling of the gas stream obtained from the oxidation step under 160.degree. C. in order to separate the sulfur by condensation. Application to the purification of the residual gases emitted by CLAUS sulfur plants.

Process for removing sulphur compounds contained in a residual gas

Catalytic process for producing sulphur from H.sub.2 S-containing acid gas wherein the acid gas is subjected to a catalytic oxidation in CLAUS stoichiometry and to a catalytic CLAUS reaction phase with deposition of sulphur on the catalyst with periodic regeneration of the sulphur-laden catalyst and cooling of the regenerated catalyst. The gas used for the regeneration and for the cooling is tapped from the acid gas supplied to the catalytic oxidation and the gas issued from the regeneration is reintroduced into said acid gas after separation of the sulphur contained therein. The process is particularly applicable to the treatment.

Catalytic process for producing sulphur from H.sub.2 S containing sour

Growing community of inventors

Pau, France

Jean Nougayrede