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    • 51. 发明专利
    • DE2134516C3
    • 1979-10-11
    • DE2134516
    • 1971-07-10
    • TAKEDA CHEMICAL INDUSTRIES, LTD., OSAKA (JAPAN)
    • WADA, TAKEO, OSAKA (JAPAN)
    • C04B20/02C04B20/06C04B21/02C04B43/10C04B31/26
    • 1351348 Expanding vermiculite TAKEDA YAKUHIN KOGYO KK 14 July 1971 [14 July 1970] 33044/71 Heading C1A Vermiculite or a mixture of vermiculite with molecules and/or ions which are capable in infiltrating into the lamellae of vermiculite is expanded by exposure to electromagnetic radiation of frequency 10 6 to 10 13 cycles per second. The molecules may be polar, e.g. H 2 O, H 2 O 2 , urea, thiourea, NH 2 CONH 2 -H 2 O complex or KH 2 PO 4 -H 2 O 2 complex and the ions may be cations, e.g. Cu(NH 3 ) 4 2+ . The vermiculite may be first cation exchanged with, e.g. Na + , Li + , CO 2+ or NH 4 + or may be dyed before during or after expansion with, e.g. 4,4 1 ,4 11 - triamino triphenylcarbinol, 1,4-diaminoanthraquinone 4,4 1 - methylene bis - 2 - chloroaniline or cupric nitrate, many other dyes being specified. In the examples radiation of frequency 2450 MHz is used to expand vermiculite alone or in admixture with one or more of water, urea, hydrogen peroxide, thiourea, CO(NH 2 ) 2 H 2 O 2 , dehydropyrrole, ethylene diamine, toluene diisocyanate, ethylene glycol, glycerine, polyethylene glycol, polyoxypropylene, KH 2 PO 4 - H 2 O 2 , sodium pyrophosphate peroxide, methyl ethyl ketone peroxide, benzoyl peroxide, sodium perborate, tetrahydrofuran, acetonitrile or Na 2 O 2 or to expand vermiculite exchanged with Cu(NHg) 4 2+ , Ca(NH 4 ) 6 2+ , N 1 (NH 3 ) 4 2+ , NH 2 - CyClOC 6 H 10 , NH 3 + , C 13 H 32 NH 3 + , K + , Na + , Ca 2+ , Ba 2+ , Cu 2+ , Ni 2+ , Mn 2+ , Fe 2+ , Fe 3+ , [Al(OH) 2À5 ] 0 À 5+ , Zn 2+ , CO 2+ or cyclo C 4 H 8 NH 2 + .