Abstract: A muffler arrangement includes an exhaust-gas muffler (4), which is subdivided into an inlet space (9) and an outlet space (10). An exhaust-gas stub (3) of an internal combustion engine (1) opens into the inlet space (9). Exhaust gas is conducted from the outlet space (10) into an air channel (15) via an exhaust-gas outlet (12). The air channel (15) is formed between the housing (4c) of the exhaust-gas muffler (4) and an outer cover (16) and extends along a side of the exhaust-gas muffler (4). A cooling-air component flow (18) is branched from a cooling-air flow of a cooling-air blower (5) and enters at a first end (25) of the air channel (15). The cooling-air component flow (18) exits again at the other second end (35) of the air channel (15).

Abstract: The invention relates to a portable handheld work apparatus such as a motor-driven chain saw, a cutoff machine, a brushcutter or the like. The work apparatus includes an internal combustion engine (1) mounted in a housing (2) which drives a work tool via centrifugal clutch (3). The centrifugal clutch (3) includes a carrier (5) driven by the engine (1). The carrier (5) has rpm-dependent displaceable centrifugal weights (6) which are displaceable against a return force and come into contact engagement against a contact wall (7) of an output part (8) so as to transmit-torque. A rotationally-elastic damping element (11) is arranged between the output part (8) and an intermediate element (10) connected to the tool (4) so as to rotate with the intermediate element (10).

Abstract: A portable work apparatus, especially a motor-driven chain saw (1), has a drive unit which is provided with a handle housing (3). The handle housing (3) includes an extension (9) which extends in the longitudinal direction of the work apparatus from a rearward handle (8) on the side facing away in the longitudinal direction from a guide bar (6) forward to the side facing toward the guide bar (6). The handle housing (3) is connected via antivibration elements to the drive unit. The work apparatus has a forward handle tube (4), which extends over the work apparatus transversely to the longitudinal direction and is attached with an end (10) to the free end of the extension (9) and with the other end (27) in the area of the rearward handle (8). At least one of the ends (10, 27) of the handle tube (4) is fixed via an antivibration element (11, 25, 26, 28, 34).

Abstract: An antivibration device is mounted between a motor unit (1) having an internal combustion engine (2) and a vibration-insulated unit (3) of a portable handheld work apparatus (4) such as a motor-driven chain saw, cutoff machine, suction/blower apparatus or the like. The antivibration device (5) includes a vibration damper (6) made of foamed elastic material (7).

Abstract: The invention is directed to a carburetor arrangement in a housing (1) and especially in the housing of a work apparatus such as a motor-driven chain saw or like portable handheld work apparatus. An engine (2) is mounted in the housing (1) and has an inlet channel (3) which is connected via a connecting pipe 4 to the intake channel section (5) of a membrane carburetor (6). An intake air filter (10) is mounted on the carburetor (6) on the end face (17) facing away from the connecting pipe (4). Combustion air is supplied through the intake air filter (10). To avoid a damaging warming of the carburetor, a heat-draining component (20) is mounted on the end face (17) of the carburetor which faces away from the connecting pipe (4). The component (20) projects beyond the contour of the carburetor (6).

Abstract: An exhaust gas muffler is provided for an internal combustion engine, especially for two-stroke engines of manually guided implements such as power chain saws, brush cutters or the like. The muffler has a housing that includes two shells. One of the shells is provided with at least one outlet opening for exhaust gas. A cover is provided that guides the exhaust gas, and the cover has at least one discharge opening for the discharge of exhaust gas to the surrounding air. An exhaust gas chamber is formed within the cover. A screen element is disposed in the vicinity of the at least one discharge opening such that the exhaust gas stream is guided through the screen element.

Abstract: An exhaust gas muffler for an internal combustion engine is provided, especially for a portable implement. The muffler has a housing with at least two parts, an inlet for exhaust gas issuing from the engine, and an outlet for discharge of processed exhaust gas. A partition is disposed within the housing between the inlet and outlet and divides the housing into two chambers. The partition is provided with a first opening in which a catalyzer is mounted, and at least one bypass opening. The muffler also has a respective valve member for each bypass opening. Below a specified temperature the bypass opening is closed. The valve member is controlled by the temperature in the muffler in such a way that when a prescribed operating temperature is exceeded, the bypass opening is opened.

Abstract: A process for the removal of carbon dioxide, sulphur compounds, water and aromatic and higher aliphatic hydrocarbons from industrial gases. The sour gas components, water and hydrocarbons are removed from the gas to be treated by absorption at elevated operating pressure. At least one morpholine derivative is used as the absorbent. The absorbent laden with absorbed components is regenerated with the aid of a stripping gas. The stripping gas is generated by partial evaporation of the laden absorbent.

Abstract: A muffler for the exhaust gas of an internal combustion engine is provided. The muffler has a housing with an inlet opening and an outlet, and surrounds a muffling chamber. In the flow path of the exhaust gas a spark arrestor screen, and on the side of the inlet opening an exhaust gas diffuser, are provided. The muffling chamber is divided by a partition into a first and second partial chamber. The volume of the second partial chamber corresponds at least approximately to the volume of the first partial chamber. The spark arrestor screen is disposed in the partition.

Abstract: The invention is directed to an arrangement of an air filter (1) and a membrane carburetor (2). The membrane carburetor (2) has an intake channel section (3) configured in the carburetor housing (4) and fuel-conducting channels (6) open into the intake channel section (3). The channels (6) are supplied from a fuel-filled control chamber (7) which is configured in the carburetor housing (4). The control chamber (7) is partitioned from a compensation chamber (11) via a control membrane (10). The compensation chamber (11) communicates with the housing (14, 16) of the air filter (1) via a compensation channel (13) downstream of an air filter element (39). The air filter housing (14) engages over the membrane carburetor (2) essentially on the side of the compensation chamber (11) and the clean chamber (24) of the air filter housing (14) communicates with the intake channel section via a connecting stub (37) which lies approximately at right angles to the intake channel section (3).

Abstract: The invention relates to a portable handheld work apparatus such as a motor-driven chain saw, a cutoff machine, a brushcutter or the like. The work apparatus includes an internal combustion engine (1) mounted in a housing (2) which drives a work tool via centrifugal clutch (3). The centrifugal clutch (3) includes a carrier (5) driven by the engine (1). The carrier (5) has rpm-dependent displaceable centrifugal weights (6) which are displaceable against a return force and come into contact engagement against a contact wall (7) of an output part (8) so as to transmit torque. A rotationally-elastic damping element (11) is arranged between the output part (8) and an intermediate element (10) connected to the tool (4) so as to rotate with the intermediate element (10).

Abstract: An exhaust gas muffler for an internal combustion engine has a housing having an inlet and an outlet for engine exhaust gas. The housing has walls defining the interior of the housing. The housing has a first housing shell having a first connecting flange and a second housing shell having a second connecting flange, wherein the first and second connecting flanges are fastened to one another in a common flange plane. Each housing shell has a bottom. A partition is mounted in the housing and divides the interior of the housing into two compartments. The two compartments are connected by flow connections allowing passage of the engine exhaust gas between the two compartments. The partition has opposed ends supported respectively on the bottoms of the housing shells. The partition has two wall portions curved outwardly in opposite directions relative to a plane of the partition and has multiple openings.

Abstract: A process for the removal of CO.sub.2 and sulfur compounds from natural gas and raw synthesis gas wherein N-formylmorpholine and N-acetylmorpholine mixtures are used as the desorbent at temperatures between -20.degree. C. and +40.degree. C. at pressures of 10 to 150 bar in a scrubbing operation. The acid gases are removed from the absorbent by flashing and the regenerated absorbent is recycled to the absorbent.

Abstract: An exhaust gas muffler for an internal combustion engine of a portable, hand-guided working tool has a housing having an exhaust gas inlet, and exhaust gas outlet, and an outlet space, wherein the exhaust gas outlet opens into the outlet space. An outlet opening is provided downstream of the outlet space and has wall elements directing the exhaust gas flow in the exit flow direction. A rebound wall is positioned transverse to the exhaust gas outlet and delimits the outlet space while providing a connecting slot into the outlet opening. The connecting slot is spaced at a distance from the outer wall of the housing that extends substantially parallel to the rebound wall. A first ramp is positioned perpendicularly to the connecting slot and slants upwardly from the rebound wall to the outlet opening. A second ramp extends in a direction of longitudinal extension of the connecting slot from an end of the insertion slot opposite the first ramp to the edge of the first ramp opposite the connecting slot.

Abstract: The invention relates to an exhaust-gas muffler for a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw. The muffler housing includes an outer shell and an inner shell and also includes an exhaust-gas inlet and an exhaust-gas outlet. A fire-protective screen is arranged in the exhaust-gas flow of the muffler. With the invention, a high service life of the fire-protective screen is achieved together with an easier exchangeability. This is achieved in that the fire-protective screen can be inserted from outside of the housing into the interior of the muffler. The screen covers the exhaust-gas inlet into an inlet chamber of the muffler. At this location, the temperature of the exhaust gas is high so that coking of the screen is very slight.

Abstract: The invention is directed to a muffler for insertion into a pipe such as the intake pipe of an internal combustion engine. The muffler includes a base body defining a longitudinal axis and having first and second axial end faces. The base body has a plurality of pass-through openings formed therein which extend between the first and second end faces of the base body in the direction of the longitudinal axis. The base body is delimited by a radially outer-lying surface and has a support section in the region of the outer-lying surface. The support section extends axially beyond the first end face and is the maximum projection extending beyond the first end face of the base body.

Abstract: In the process for purifying an aqueous MDEA-solution the formate content of the MDEA-solution circulated in a main stream between the absorber and desorber of a hydrogen sulfide wash unit for gas produced by gasification of a carbonaceous material, e.g. coal, is measured. A partial stream of MDEA-solution is withdrawn from the main stream, passed over an ion exchange medium which removes some formate present to form a partially purified partial stream and subsequently the purified partial stream is returned to the main stream. The amount of the withdrawal from the main stream is controlled so that the formate content of the main stream is maintained between 10 and 30 g/l. Only from 0.5 to 0.08% by volume need be withdrawn from the main stream to form the partial stream. The ion exchange medium can be regenerated with a hydroxide-containing solution, which is subsequently fed to an ammonia separator column of a hydrogen sulfide wash apparatus.

Abstract: Adding an aliphatic dicarboxylic acid or a salt thereof with an inorganic base to a conventional eye drop solution has been found to extend the dwell time of the solution when applied to the surface of the eye. Thus, Applicants' method of extending dwell time of conventional eye drops applied on the surface of an eye, includes providing an eye drop solution with an additive in an amount effective to extend the dwell time of the eye drop solution on the surface of an eye, the additive including at least one substance selected from the group consisting of an aliphatic dicarboxylic acid having a general formula (CH.sub.2).sub.6-9.(COOH).sub.2 and a salt of an aliphatic dicarboxylic acid having a general formula (CH.sub.2).sub.6-9. (COOH).sub.2 with an inorganic base.