首页>
外国专利>
Process for the production of finely divided or fibrous precursors of activated carbon from pitch-like bitumenous substances and substances containing nitrogen or nitrogen and heavy metal, from which catalytically active activated carbons can be produced
Process for the production of finely divided or fibrous precursors of activated carbon from pitch-like bitumenous substances and substances containing nitrogen or nitrogen and heavy metal, from which catalytically active activated carbons can be produced
The invention relates to a process for the production of finely divided or fibrous precursors of activated carbon preproducts which contain pitch-like bitumenous substances and substances containing nitrogen or containing nitrogen and heavy metals in an isotropic molecular-dispersed distribution, by converting the substances into the dispersed state under the action of a supercritical solvent phase and giving the liquid solution obtained a rapid expansion and cooling with simultaneous extraction of the solvent constituents contained therein.
展开▼