Institut Francais Du Pe'trole

Institut Francais Du Petrole, Des Carburants Et Lubrifiants Et

Institut Français du Pétrole

Institut Francais Du Petrole, Des Carburants Et Lubrifiants

Institut Francaise Du Petrole, Des Carburants Et Lubrifiants

Institut Francaise Du Petrole, Des Carburants Et Lubrifiants Et

Le Gaz Integral

Institut Francais Du Petrole Des Carburants Et Lubricants Et Enterprise

Institut Francais Du Petrole, Des Carburants & Lubrifiants

Claude Dezael

Andre Deschamps

Sigismond Franckowiak

Fabrice Lecomte

Philippe Renault

Henri Gruhier

Jean-Charles Viltard

Christine Travers

Jean-Pierre Poitevin

Philippe Courty

Christian R Busson

Jean Morlec

Michel Roussel

Jean-Claude Mileo

Claude Roux-Guerraz

David Smith

Jacques Queyrel

David Benayoun

Christophe Berat

Desulphurizing catalytic composition and its use in removing hydrogen sulphide and sulphur dioxide from a gas

A process and an apparatus are described for treatment of a gas containing hydrogen sulphide and sulphur dioxide, for example a Claus plant tail gas, in which the gas is brought into contact with an organic solvent ( ) e.g. polyethylene glycol , containing a catalyst e.g. sodium salicylate, in at least one gas-liquid reactor-contactor ( ) and a gas ( ) substantially no longer containing hydrogen sulphide and sulphur dioxide is recovered. A single-phase solution ( ) of solvent and sulphur is extracted from the reactor-contactor and a portion is cooled in at least one cooling zone ( ) to obtain a suspension of sulphur crystals in the solvent, the crystallised sulphur is separated from the solvent in a separation zone ( ), the sulphur-depleted solvent ( ) is recovered and recycled at least in part to the reactor-contactor ( ), and the sulphur ( ) is recovered.

Post conversion of a gas containing hydrogen sulphide, the elimination of sulphur crystallized by cooling

An apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide comprising a first gas-liquid reactor-contactor (,), means (,) for supplying a gas to be treated and means (,) for supplying an organic solvent, means (,) for recovering sulphur and means (,) for extracting a gaseous effluent containing sulphur in vapour form, the apparatus being characterized in that it comprises a second reactor-contactor (,) connected to the means for extracting the gaseous effluent, means (,) for supplying an organic solvent which is depleted in sulphur connected to the second reactor-contactor, means (,) for recovering a gaseous effluent which has been cleaned of sulphur connected to the second reactor-contactor, means (,) for extracting a liquid phase containing the organic solvent and sulphur connected to the second reactor-contactor, at least one means for depleting at least a portion of the liquid phase in sulphur connected to the means for extracting the liquid phase, comprising at least one means (,) for cooling said phase connected to a means (,) for separating solid sulphur which delivers a solid phase (,) of sulphur at a first end and a liquid phase (,) which is depleted in sulphur at a second end, the second end being connected to means (,) for supplying solvent depleted in sulphur, the apparatus being further characterized in that at least one of the reactor-contactors contains a catalyst.

Apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide, comprising a step for depleting the recycled solvent in sulphur

An apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide, comprising a liquid-gas reactor-contactor (,), means (,) for supplying gas to be treated and means (,) for supplying an organic solvent containing a catalyst, means (,) for recovering sulphur an doutlet means (,) for a gaseous effluent containing sulphur in vapour form, the apparatus being characterized in that it comprises at least one means (,) for contacting and cooling the gaseous effluent, delivering a three-phase effluent, having an inlet connected to the effluent outlet means (,) and to means (,) for recycling a cooling solvent, means (,) for separating said three-phase effluent connected to the cooling means, adapted to separate purified gas from sulphur and comprising means (,) for evacuating purified gas, means (,) for extracting sulphur and means (,) for recovering solvent connected to the means (,) for recycling the cooling solvent.

Apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide

A process is provided for removing hydrogen sulfide out of a gas, such as natural gas. The hydrogen sulfide contaminated gas is contacted with a catalytic aqueous solution containing a polyvalent metal chelating agent under conditions in which the hydrogen sulfide is oxidized into elemental sulfur and the polyvalent metal chelating agent is reduced to a lower oxidation state, and the treated gas is recovered. The solution containing the polyvalent metal chelating agent and the elemental sulfur is filtered at a pressure of at least 1 Mpascals. At least a portion of the filtered solution containing the polyvalent metal chelating agent is degassed and/or depressurized for the removal of components such as light hydrocarbons and carbon dioxide; contacted with an oxidizing agent and recycled back to the hydrogen sulfide removal step. By filtering the sulfur out of the solution at a pressure of at least 1 Mpascal, foam formation and clogging problems can be avoided.

High-pressure sulfur recovery process

The invention is a process for analyzing a fluid sample. The process includes collecting a fluid sample in a sampling unit having a cavity for containing the fluid, at least one passage used which connects the cavity to a source of the fluid sample to aspirate the fluid sample from the fluid sample source into the cavity and from which the fluid sample is injected into an analyzer device, a pressure varying device disposed in the cavity which provides control of pressure of the fluid sample in the cavity and a heat source which heats the fluid sample in the cavity; controlling at least one of the pressure of the fluid sample in the cavity with the pressure varying device and the temperature of the fluid sample in the cavity with the heat source to maintain the sample in the cavity to have at least one of pressure and temperature substantially identical to at least one of the pressure and temperature of the sample at a time of collection in the cavity from the fluid source; and injecting the fluid sample from cavity into the analyzer device with at least one of the temperature and the pressure substantially identical to at least one of the temperature and the pressure of the fluid sample in the cavity at the time of collection and thereafter analyzing the fluid sample.

Device for removing and/or injecting a fluid sample enabling the

In a process and apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide, the gas is contacted with an organic solvent (1)for example, a polyalkylene glycol, containing a catalyst for example, an alkaline salt of a week organic acid, in at least one gas-liquid reactor contactor (2) and a gas (20) substantially no longer containing hydrogen sulphide and sulphur dioxide is recovered. The effluent contains sulphur vapor. It is cooled by mixing with a solvent-water mixture (14) or by cooled solvent in a cooling zone (7) to produce a suspension of sulphur crystals in the solvent. The crystallised sulphur is separated from the solvent in a separation zone (30) and the cooled solvent is recycled (13). An effluent (17) which is free of sulphur gas is obtained.

Process for treating a gas containing hydrogen sulphide and sulphur

In a process for treating a gas containing hydrogen sulphide and sulphur dioxide, such as Claus plant tail gas, to substantially reduce emission of sulphur vapor in the treated gases, the process a characterized in that the gas is brought into contact with a solvent (5) in at least one gas-liquid reactor-contactor (2) and a gas (20) is recovered which is sent to a second reactor (102) where it is brought into contact with solvent (105), the solvent (105) being cooled by suitable means (190), to separate a portion of the sulphur from the solvent. The resultant solvent depleted in sulphur, contacts the gas (20) from the first reactor (2). The gas (120) from the second reactor is highly depleted in sulphur vapor. At least one of the reactors contains a catalyst. The solvent may be insoluble in water, e.g. dodecane, tridecane, naphtha, or soluble in water, e.g. glycerol, thiodiglycol, cyclohexanedimethylethanol, or an acid ester. The catalyst may comprise, e.g., alkaline salts of organic acids such as benzoic acid or salicylic acid.

Process for treating gas containing hydrogen sulfide and sulphur

A process for the extraction of hydrogen sulphide from a gas mixture comprises: a step (a) in which the gas mixture is passed into an aqueous acidic solution of copper sulphate under conditions which lead to the formation of copper sulphide; a gas which is highly depleted in hydrogen sulphide and an aqueous phase containing copper sulphide in suspension are recovered; a step (b) in which the copper sulphide contained in suspension in the aqueous phase from step (a) is oxidised using an oxygen-containing gas under conditions which lead to the formation of solid elemental sulphur and soluble copper sulphate from this liquid phase; and a step (c) in which the solid sulphur and the solid copper sulphide which is not transformed during step (b) are separated and at least a portion of the aqueous acidic phase containing the copper sulphate formed during step (b) is optionally recycled to step (a). The process is used to absorb hydrogen sulphide contained in a variety of industrial gases.

Process for the extraction of hydrogen sulphide from a gas mixture

The invention concerns a process for the treatment of ventilation air containing malodorous gases, e.g., styrene, involving:

Process for the treatment of ventilation air containing styrene

The invention concerns, on one hand, a new zeolitic catalytic composition which comprises a small-pore mordenite present in the form of needles, exchanged with at least one metal chosen from the group consisting of cooper, vanadium, tungsten, iron, colbalt and molybdenum, and on the other hand, use of this catalytic composition as a catalyst for the reduction of nitrogen oxides by ammonia.

Process and catalyst for selective reduction of nitrogen oxides

The invention concerns a process for removing sulfur oxides and particularly sulfur dioxide contained in such gases as industrial fumes, wherein said gas is contacted with a solid absorbent containing magnesium oxide and at least one group VIII noble metal, in such conditions that the sulfur oxides are mainly fixed as magnesium sulfate, and then the used solid absorbent is regenerated by contact with a hydrogen sulfide-containing reducing gas.

Process for removing sulfur oxides from a gas by means of an absorption

The invention concerns a process for converting heavy petroleum residues to hydrogen and to gaseous and distillable hydrocarbons, comprising the association of a step of hydropyrolysis (inside tube 3) with a step of catalytic steam-gasification of the formed coke (outside tube 3), characterized in that the hydropyrolysis step is performed in the presence of a solid supporting a carbon gasification catalyst circulating between the hydropyrolysis zone and the coke steam-gasification zone, said steam-gasification being performed in the absence of oxygen. The petroleum residue, hydrogen and steam are introduced respectively through lines 5, 6 and 7. The products are withdrawn through line 10. Heat may be supplied by the radiating tube 4.

Process for converting heavy petroleum residues to hydrogen and gaseous

Process for separating H.sub.2 S from CO.sub.2, both contained in a treated gas, wherein said gas is contacted with a solution which selectively absorbs H.sub.2 S, wherefrom H.sub.2 S is separated in a regeneration zone, CO.sub.2 being released, said contact step being effected in a contact apparatus comprising 1 to 10 stages each formed of parallel vertical tubes whose bottom portion is provided with injection means of the cyclonic type imparting to the supplied gas and liquid a swirling ascending motion.

Process for purifying a gas containing hydrogen sulfide and carbon

A process for purifying a gas containing hydrogen sulfide, wherein said gas is admixed with oxygen and contacted with a carbon mass of specific surface higher than 50 m2/g and containing at least one oxide and/or sulfate of iron and/or copper, at a temperature from 20.degree. to 170.degree. C., the operating conditions being so selected as to avoid a substantial oxidation of said mass and said mass being periodically regenerated by heating to 200.degree.-300.degree. C. in the presence of oxygen, the regenerating conditions being such as to avoid a substantial oxidation of the carbon mass.

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Maisons Laffitte, France

Claude Dezael