Comprimo B.v.

Gastec N.v.

Other

Veg-gasinstituut N.v.

Jacobs Nederland B.v.

Stork Engineers & Contractors B.v.

Comprino, B.v.

Johannes Borsboom

Jan Adolf Lagas

John Wilhelm Geus

Pieter H Berben

Petrus Franciscus M T Van Nisselrooij

Anne Van Warners

Petrus Franciscus Maria Theresia Van Nisselrooij

Maria Louis Wetzels

Renee Van Yperen

Petrus Franciscus Van Nisselrooij

Vijay Kumar Chopra

Petrus F M T Van Nisselrooij

The invention is directed to a process for the catalytic reduction of sulphur dioxide from a gas mixture at least containing 10 vol. % of water, in which process the gas mixture is passed over a sulphur resistant hydrogenation catalyst in sulphidic form, at a space velocity of at least 2000 h , in the presence of a reducing component, preferably at least partly consisting of hydrogen, in a molar ratio or reducing component to sulphur dioxide of more than 10 up to 100, at a temperature of 125&deg; C. to 300&deg; C., followed by passing the gas mixture, after the said reduction, through a dry oxidation bed for the oxidation of sulphur compounds, more in particular hydrogen sulphide, to elemental sulphur.

Process for the removal of sulphur compounds from gases

The invention is directed to a process for the recovery of sulphur from a hydrogen sulphide containing gas, which process comprises; i) oxidizing part of the hydrogen sulphide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulphur dioxide; ii) reacting the product gas of this oxidation stage in at least two catalytic stages, in accordance with the Claus equation: 2 H S&plus;SO &rarr;2 H O&plus;3/n S ; iii) catalytically reducing SO in the gas leaving the last of said at least two catalytic stages, wherein the catalytic reduction takes place in a catalyst bed downstream from the last Claus catalytic stage.

Process for the recovery of sulphur from a hydrogen sulphide, containing gas

Method and apparatus for degassing sulfur

A process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising oxidizing hydrogen sulfide with oxygen, and then reacting the product gas of this oxidation further by using at least two catalytic stages. The H.sub.2 S concentration in the gas leaving the last catalytic stage is controlled to have a value ranging between 0.8 and 3% by volume by reducing the quantity of combustion or oxidation air passed to the oxidation stage and/or causing a portion of the hydrogen sulfide-containing feedstock gas to bypass the oxidation stage and to be added to the gas flowing to a catalytic stage. The gas leaving the last catalytic stage is introduced into a heat exchanger having a wall temperature below the solidification point of sulfur and above the dew point of water, wherein the sulfur deposits on the heat exchanger wall and is removed with the aid of gravity.

Process for removing elemental sulfur from a gas stream

The invention relates to a process for removing elemental sulfur which is present in a gas in the form of vapor and/or entrained particles, in which process the gas to be treated is cooled. The gas to be treated is introduced into a heat exchanger at the lower end thereof and with the aid of the temperature and/or the flow velocity of the cooling medium it is ensured that the wall of the heat exchanger has a temperature below the solidification point of sulfur and above the dew point of water, if any, present in the gas. The deposited sulfur is removed under the influence of gravity countercurrent to the gas to be treated.

The invention is directed to a process for the recovery of sulfur from a hydrogen sulfide containing gas, which comprises oxidizing hydrogen sulfide with oxygen, and then reacting the product gas of this oxidation further by using at least two catalytic stages, in accordance with the equation: 2H.sub.2 S+SO.sub.2 .revreaction.2H.sub.2 O+3/n S.sub.n. In order to improve the process and the process control, the invention is characterized in that the H.sub.2 S concentration in the gas leaving the last catalytic stage is controlled to have a value ranging between 0.8 and 3% by volume by reducing the quantity of combustion or oxidation air passed to the oxidation stage and/or causing a portion of the hydrogen sulfide containing feedstock gas to bypass the oxidation stage and to be added to the gas flowing to a catalytic stage.

Process for recovering sulfur from sulfur-containing gases

A process is described for converting carbon oxylsulfide and/or carbon disulfide, possibly in combination with hydrogen cyanide, O.sub.2 and/or SO.sub.2 in a reducing CO containing gas stream by the catalytic hydrolysis of COS and CS.sub.2, followed by the removal of H.sub.2 S, present and formed, from the gas stream. According to the invention, the process is characterized by

Process for converting and removing sulfur compounds from a CO

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Rijswijk, Netherlands

Johannes Borsboom