Basf Se Corporation

Basf Aktiengesellschaft

Rupert Wagner

Randolf Hugo

Ute Lichtfers

Volker Maywald

Norbert G&ouml;tz

Georg Sieder

Andreas Keller

Gerald Vorberg

Hans Hasse

Stephan Maurer

Norbert Asprion

Torsten Katz

Horst Hartmann

Bernhard Brunner

Thomas S Holst

Christian Riemann

Hartmann K&ouml;nig

Christoph Grossmann

Iven Clausen

Dirk Borchers

Erika Dengler

Volker Schuda

Hans-Peter Schmid

Thomas K&uuml;kenh&ouml;hner

Heiko Hallmann

Maximilian Dyga

Matthias Schult

A process for removing acid gases from a hydrocarbonaceous fluid stream or an oxygen-comprising fluid stream in which the fluid stream is contacted with an aqueous solution which is essentially free from inorganic basic salts and comprises (i) at least one amine and (ii) at least one metal salt of an aminocarboxylic acid and/or an aminosulfonic acid. Conjoint use of the aminocarboxylic and/or aminosulfonic salt reduces the coabsorption of hydrocarbons or oxygen without significantly impairing the absorption rate at which acid gases are absorbed, without significantly reducing the absorption capacity of the solution for acid gases, and without significantly increasing the energy demand required for regeneration.

Removal of acid gases from a fluid flow by means of reduced coabsorption of hydrocarbons and oxygen

An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of a) of at least one metal salt of an aminocarboxylic acid, and b) of at least one acid promoter, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The acid promoter is selected from mineral acids, carboxylic acids, sulfonic acids, organic phosphonic acids and partial esters thereof. The absorption medium, compared with absorption media based on amino acid salts, has a reduced regeneration energy requirement without significantly reducing the absorption capacity of the solution for acid gases. In a process for removing acid gases from the fluid stream, the fluid stream is brought into contact with the absorption medium.

Absorption medium for removing acid gases which comprises amino acid and acid promoter

In a method for removing acid gases from a fluid stream, the fluid stream, which is in contact with an absorption medium within an absorber, is passed through a first absorption zone in the absorber to remove a majority of acid gases from the fluid stream. The fluid stream is susequently passed through a second absorption zone in the absorber to further remove acid gases from the fluid stream. The loaded absorption medium is passed into a first regeneration zone to obtain a partially regenerated absorption medium, and a part of the partially regenerated absorption medium is passed into the first absorption zone. The other part of the partially regenerated absorption medium is passed into a second regeneration zone to obtain a regenerated absorption medium. A part of the regenerated absorption medium is passed into the first absorption zone and the other part is passed into the second absorption zone.

Method for removing acid gases from a fluid stream

A description is given of an absorption medium for removing carbon dioxide from a gas stream, which comprises an aqueous solution of at least one amine and at least one aminocarboxylic acid and/or aminosulfonic acid. The concomitant use of an aminocarboxylic acid or aminosulfonic acid reduces the energy required for regeneration of the absorption medium.

Carbon dioxide absorbent requiring less regeneration energy

The present invention relates to an apparatus for the tangential introduction of a gas-loaded liquid stream into the top of a column in which gas and liquid are separated. Entry into the column top proceeds through a conventional radially arranged port, to which, however, a special tube construction connects which ensures as smooth as possible non-turbulent flow and its tangential exit into the column top.

Device for the tangential introduction of a gas-loaded liquid stream into the head of a column

In a process for deacidifying a fluid hydrocarbon stream which comprises carbon dioxide (CO) and/or other acid gases as impurities, the fluid stream is brought into intimate contact with an absorption liquid in an absorption or extraction zone (), the substantially purified fluid stream and the absorption liquid which is loaded with COand/or other acid gases are separated from one another, and the absorption liquid is subsequently regenerated and then again fed to the absorption extraction zone (). To regenerate the absorption liquid, the loaded absorption liquid is first expanded in a first low-pressure expansion stage () to a pressure of from 1 to 2 bar (absolute). The partially regenerated absorption liquid is then heated in a heat exchanger () and then, in a second low-pressure expansion stage (), again expanded to a pressure of from 1 to 2 bar (absolute).

Method for neutralising a stream of hydrocarbon fluid

COS is selectively removed with respect to COfrom a hydrocarbonaceous fluid stream which contains COand COS. Examples of the fluid stream include a gas stream, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or from liquid or liquefied hydrocarbons, for example LPG (Liquefied Petroleum Gas) or NGL (Natural Gas Liquids). The process is carried out by (1) intimately contacting the fluid stream in an absorption or extraction zone with a scrubbing liquor consisting of an aqueous amine solution containing from 1.5 to 5 mol/l of an aliphatic alkanolamine having of from 2 to 12 carbon atoms and from 0.8 to 1.7 mol/l of at least one activator selected from the group consisting of piperazine, methyl piperazine and morpholine, (2) removing the COS essentially completely from the fluid stream, and (3) separating the substantially COS-decontaminated fluid stream and the COS-loaded scrubbing liquor and discharging them from the absorption or extraction zone.

Method for removing COS from a stream of hydrocarbon fluid and wash liquid for use in a method of this type

The disclosure concerns a process for removing mercaptans from fluid streams comprising same, especially from hydrocarbon gas streams, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or else from liquid hydrocarbons, for example LPG (liquefied petroleum gas). The invention comprises intimately contacting the fluid stream in an absorption or extraction zone with a scrubbing liquor comprising at least one aliphatic alkanolamine of 2-12 carbon atoms, the amount of wash liquor being supplied to the absorption or extraction zone being sufficient to remove at least CO and H S essentially completely from the fluid stream, and separating the substantially decontaminated fluid stream and the contaminated wash liquor and discharging them from the absorption zone. The substantially complete removal of CO and H S is accompanied by the removal from the gas, stream of a very large portion of the mercaptans as well, without a significant fraction of the hydrocarbon gases dissolving in the wash liquor.

Method for removing mercaptans from fluid fluxes

A process for removing impurities from 3-(2&prime;-acetoxyethyl)-dihydro-2(3H)-furanone (I), which comprises initially preparing the 3-(2&prime;-acetoxyethyl)-dihydro-2(3H)-furanone containing the undesirable impurities in a manner known per se by acetylating 3-(2&prime;-hydroxylethyl)-dihydro-2(3H)-furanone, subsequently treating it with strong mineral acids and finally removing the decomposition products of the undesirable impurities from I.

Method for separating contaminants from 3-(2&prime;-Acetoxy-Ethyl-Dihydro-2(3H)-Furanone

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Worms, Germany

Rupert Wagner