Abstract: A carbon nanotube synthesis process apparatus comprises a reaction tube in which a reaction field is formed, and a discharge pipe (32) arranged downstream of the reaction tube and discharging carbon nanotubes to the outside. A plurality of nozzles (34) are provided on the sidewall of the discharge pipe (32) in directions which are deflected with respect to the center (O) of the discharge pipe (32). When gases are discharged from the plurality of nozzles (34), a swirl flowing from the inner side surface along the inner side surface is produced in the discharge pipe (32). Adhesion of carbon nanotubes to the inner side surface of the discharge pipe (32) is prevented by the swirl flow and thus the apparatus can be operated continuously.

Abstract: A process for producing carbon black comprising reacting a reaction stream formed by a prior carbon black forming process with an oxidant and a carbon black yielding feedstock to produce carbon black and cooling, separating and recovering the carbon black. The process advantageously reduces the amount of fuel needed to produce carbon black. Also disclosed is an apparatus for practicing the process.

Abstract: Carbon blacks containing silicon and a process for manufacturing them. The carbon blacks containing silicon are suitable as reinforcing carbon blacks for rubber mixtures and give the latter viscoelastic properties such as reduced rolling resistance in tires. At the same time, the wet traction is even improved in the process.

Abstract: Compositions and methods which are effective to treat benign gynecological disorders for extended periods of time in women in who the risk of endometrial stimulation is minimized or absent are described, wherein an effective amount of a gonadotropin hormone releasing hormone composition and an effective amount of an estrogenic composition are provided over a period of time, optionally with addition of an androgenic composition.

Abstract: A process for the combustion of a hydrocarbon, such as methane, in particular for energy production, in which the hydrocarbon, which will be assumed to be methane, is fed to a first stage in which it is reacted with recycled carbon dioxide produced during a separate, second stage of the combustion. In the first stage, the following reactions takes place:CH.sub.4 +CO.sub.2 .fwdarw.2CO+2H.sub.2 (1)CH.sub.4 +CO.sub.2 .fwdarw.2C+2H.sub.2 O (2)CO.sub.2 +H.sub.2 .fwdarw.CO+H.sub.2 O (3)The carbon produced in the reaction (2) is separated, and the gaseous mixture produced in said first stage is then fed to a second stage for reaction with oxygen, in which the reaction products are steam and carbon dioxide, this carbon dioxide, minus any excess, being totally recycled to said first stage.

Abstract: A diffusion process for steam reforming of a hydrocarbon to produce H.sub.2, CO and CO.sub.2, that includes: providing a generally tubular, porous, ceramic membrane, and providing a heated reaction zone in a container into which the membrane is received; the membrane carrying a catalytically active metallic substance; passing a hydrocarbon and steam containing first fluid stream into the zone and into contact with one side of the membrane, to produce CO, CO.sub.2 and H.sub.2 ; and passing a second fluid stream adjacent the opposite side of the membrane in such manner as to promote hydrogen diffusion through the membrane from said one side to said opposite side thereof; and removing hydrogen from the opposite side of the membrane.