63 results about "Claus process" patented technology

Increasing the economic and environmental compatibility in treatment processes in sour gas production. For 25 yr, Mobil Erdgas Erdoel GmbH (MEEG) has been treating considerable amounts of sour gas in N. Germany. In 9 fields with different gas qualities, there are ca 30 producing wells. The main processes of the sour gas production and treatment are described. The gas is dried at the well site and if the reservoir pressure is not sufficient, compressed for transportation to the central processing facility. In most cases the use of sulfur solvents is necessary at the wells. Natural gas scrubbers for the total removal of hydrogen sulfide and Claus units with downstream units to obtain sulfur are utilized. To increase the environmental compatibility and economics, a number of secondary processes have been introduced for emission control; glycol stripping; and the Purisol, Selexol, Sulfinol, and Claus processes.

The present invention provides a method for removing sulfur species from a gas stream without the use of a sulfur species removal process, such as an amine scrub. The sulfur species are removed by directly subjecting the gas stream to a sulfur recovery process, such as a Claus or sub-dewpoint Claus process at high pressure and moderate temperatures, wherein the sulfur recovery process comprises a catalyst which does not comprise activated carbon.

A highly efficient desulfurization method for removing a hydrogen sulfide and a sulfur dioxide simultaneously comprises the step of contacting a gas containing the hydrogen sulfide and the sulfur dioxide with water, or an aqueous solution containing a first heterogeneous catalyst for desulfurization to oxidize the hydrogen sulfide with the sulfur dioxide. 3~5% sulfur-containing tail gas exhausted from, especially, Claus Process can be treated at a high efficiency of over 99%.

The invention provides a method for treating claus technical tail gas. The method comprises the following steps of: continuously feeding the claus technical tail gas containing sulfur dioxide, oxygen and water into a reactor filled with a multihole carbon desulfurizing agent; generating catalytic oxidation reaction between the sulfur dioxide and the water in the tail gas on the surface of multihole carbon at the reaction temperature between 30 and 150 DEG C; and continuously introducing regenerative detergent into the reactor. By the method, adsorption, catalytic oxidation and desorption are synchronously carried out on low-concentration sulfur-containing waste gas in the claus technical tail gas which is difficult to treat; oxygen and water in the tail gas can be fully used; under the condition that oxygen is not required to be swelled and the water is not required to be compensated, standard discharging can be realized and sulfur resources can be recycled; an obtained by-product is dilute sulphuric acid which can be directly used in industrial production or used in the industrial production after being concentrated; the multihole carbon desulfurizing agent is low in cost and long in service life and can be recycled; the technical flow is simple, and the investment is low; and the running cost is competitive.

Disclosed is a method for treating a gas stream rich in hydrogen sulfide by providing one or more feed gas streams rich in hydrogen sulfide into a Claus reaction furnace, providing air into the Claus reaction furnace, providing supplemental oxygen into the Claus reaction furnace, and providing steam to the Claus reaction furnace, where the steam is in addition to any steam that may be present in gases that are recycled to the Claus reaction furnace. The components are then reacted at a temperature above about 2400° F. and at a pressure sufficient to cause hydrogen sulfide to be converted into sulfur.

All sulfur compounds can be efficiently removed from natural gas that contains hydrogen sulfide and other sulfur compounds such as mercaptan without using physical absorption. The process comprises an absorption step of treating natural gas by means of a chemical absorption method using an amine-containing solution to mainly remove hydrogen sulfide and carbon dioxide, an adsorption step of flowing the natural gas from the absorption step through a packed bed of a molecular sieve to mainly remove mercaptan, a recovery step of recovering sulfur compounds by converting the hydrogen sulfide removed in the absorption step into sulfur by means of the Claus process, a regeneration step of desorbing the mercaptan adsorbed on the molecular sieve in the adsorption step using heated gas and a reaction step of converting the mercaptan in the regeneration exhaust gas exhausted from the regeneration step into hydrogen sulfide. The reaction step is conducted by injecting steam or water at a ratio of H2O / S=1 to 5 (molar ratio) relative to the sulfur in the regeneration exhaust gas in the presence of a catalyst under the conditions of a temperature level of 250 to 400° C. and a pressure level of 1 to 10 MPa.

A method for recovering sulfur from an acid gas feed is provided. The method comprising the steps of mixing the acid gas feed and an absorption process outlet stream to form a combined Claus feed, introducing the combined Claus feed and a sulfur dioxide enriched air feed to a Claus process to produce a Claus outlet gas stream, introducing the Claus outlet gas stream to a thermal oxidizer, treating the thermal oxidizer outlet stream in a gas treatment unit to produce a dehydrated stream, introducing the dehydrated stream to a membrane sweeping unit to produce a sweep membrane residue stream and a sulfur dioxide enriched air feed, introducing a sweep air stream to a permeate side of the membrane sweeping unit, and introducing the sweep membrane residue stream to a sulfur dioxide absorption process to produce the absorption process outlet stream and a stack feed.

A method for increasing sulfur recovery from an acid gas feed comprising the steps of introducing the acid gas feed and a sulfur dioxide enriched air stream to a Claus process to produce a product gas stream, introducing the product gas stream to a thermal oxidizer to produce a flue gas stream, cooling the flue gas stream to produce a cooled take-off stream, separating the cooled take-off stream into a saturated gas stream, heating the saturated gas stream to produce a membrane gas stream, introducing the membrane gas stream to a membrane sweeping unit, the membrane sweeping unit comprises a membrane, the sulfur dioxide in the membrane gas stream permeates the membrane of the membrane sweeping unit, introducing a sweep air stream, the sweep air stream collects the sulfur dioxide to create the sulfur dioxide enriched air stream.

The invention discloses a room-temperature liquid-phase Claus process taking ionic liquid as media. The room-temperature liquid-phase Claus process includes pumping ionic liquid absorbing H2S and another ionic liquid absorbing SO2 into a reaction tower with baffles and stirring blades inside for action, pumping out the reacted ionic liquid containing solid sulphur via a pump, enabling the ionic liquid containing the solid sulphur to sequentially pass a filtering, washing and drying all-in-one machine and a flash tank, dividing the ionic liquid into two streams to enter two absorption towers for respectively absorbing H2S and SO2, and enabling the ionic liquid after absorbing the H2S and SO2 to return to the reaction tower so as to form circulation. The H2S is sourced from to-be-treated gas, and the SO2 is obtained from part of sulphur by burning. The filtered ionic liquid has good H2S and SO2 dissolution characteristics, and can be recycled for a long time; the developed room-temperature liquid-phase Claus process is low in operating temperature, small in energy consumption, free of VOCs (volatile organic compounds) emission and needless of subsequent tail gas treatment, can be used for producing high-purity sulphur, and is a green and environment-friendly liquid-phase Claus reaction innovation process.