摘要:
A novel titanium dioxide hydrate is provided whose structure exhibits X-ray diffraction peaks at 24.6.+-.0.4.degree. and 48.+-.0.4.degree., and which is suitable as an adsorbent material. A process for preparing the novel titanium dioxide hydrate also is provided which includes hydrolyzing a specific titanium sulfate solution and thereafter flocculating colloidal titanium dioxide hydrate by the addition of a monobasic acid and recovering the titanium dioxide hydrate.
摘要:
A drive shield for use in tunnelling operations includes a generally cylindrical cutting edge supported by a frame. A knife shield is telescoped together with the cutting edge, the knife shield having a plurality of elongate members (or planks). Each of the planks is extensible relative to the cutting edge in the direction of tunnel advance. In use, all the planks are advanced relative to the cutting edge which is then advanced in a follow-up sequence.
摘要:
The invention relates to a method for insulating rotor plates for electric motors by coating the rotor plates with a solution containing organo-silicon compounds, drying the coated plates and thereafter contacting the coated plates with a steam atmosphere to form a blue iron-oxide film thereon.
摘要:
N-[4-(.beta.- -ethyl)-benzenesulfonyl]-N'-cyclopentyl-urea of the formula ##SPC1##Having a long-lasting and strong hypoglycemic action in the treatment of diabetes mellitus and a process for its manufacture.