摘要:
A device for testing the scratch resistance of a surface of a test specimen by means of a gas stream charged with solid particles, comprising: a tube, having an entry and an exit, for directing the gas stream on to a specimen holder with the surface to be tested, a means for providing the gas stream, and a metering device positioned along the tube for metering the solid particles into the gas stream, wherein a tube part is angled at an angle in the region of the tube exit and the angled tube part has, at the angle, an opening at which the specimen holder is positioned such that the gas stream is directed on to the specimen holder.
摘要:
The present invention relates to a process for the production of carbon nanotubes, in particular those having a diameter of 3-150 nm and an aspect ratio of length:diameter (L:D)>100, by decomposition of hydrocarbons on a heterogeneous catalyst which comprises Mn, Co, preferably also molybdenum, and an inert support material, and the catalyst and the carbon nanotubes themselves and the use thereof.
摘要:
Process for the reduction of oxygen in aqueous chlorine- and/or chloride-containing solutions in the presence of a catalyst comprising nitrogen-doped carbon nanotubes.
摘要:
The invention relates to a process for esterifying free fatty acids in vegetable and animal fat with alcohols over heterogeneous acidic ion exchange resin catalysts at temperatures of 60 to 120° C.
摘要:
The present invention relates to the industrial production of vinylene carbonate (VC) by eliminating hydrogen chloride from chloroethylene glycol carbonate (CGC) or solid catalysts in the gas phase, the reaction being carried out over a catalyst bed agitated by thorough mixing.
摘要:
The present invention is based on a process for industrial scale synthesis of poly- and oligothiophenes, which works in concentrated solution. In this process, a solution which comprises an organometallic thiophene reagent is added to a second solution which comprises a catalyst.