| 摘要 |
<p>Tricyclo[5.3.1.0<2><,><6>]dec-3-ene derivatives of the general formula (I) …<IMAGE>… in which R<1> is hydrogen, a straight-chain or branched alkyl radical having 1 to 8 carbon atoms, an acyl radical R<2>-CO in which R<2> is hydrogen or a straight-chain or branched alkyl radical or alkenyl radical having 1 to 18 carbon atoms, or a hydroxyalkyl radical …<IMAGE>… in which R<3> and R<4>, independently of one another, may be hydrogen or a hydroxyl group, and m and n are integers in the range from 0 to 6, and the sum (m + n) is an integer in the range from 1 to 6, with the proviso that at least one of the radicals R<3> and R<4> is a hydroxyl group,… are used as frothing agents in coal and mineral flotation. …<IMAGE>… </p> |
