"Kinetics study of reaction between Kola apatite and phosphoric acid"@en . "M\u00FCllerov\u00E1, Petra" . "Praha" . "Sborn\u00EDk - 52. konference chemick\u00E9ho a procesn\u00EDho in\u017Een\u00FDrstv\u00ED(CD-ROM)" . . . . "Studium kinetiky reakce apatitu Kola s kyselinou trihydrogenfosfore\u010Dnou"@cs . . "4"^^ . . . . . "Srn\u00ED" . . "Pr\u00E1ce se zab\u00FDv\u00E1 rozpou\u0161t\u011Bn\u00EDm apatitu Kola kyselinou trihydrogenfosfore\u010Dnou. K m\u011B\u0159en\u00ED byla pou\u017Eita frakce \u010D\u00E1stic apatitu Kola o pr\u016Fm\u011Bru 0,20-0,25 mm. V\u0161echny experimenty byly provedeny v izotermn\u00EDm m\u00EDchan\u00E9m vs\u00E1dkov\u00E9m reaktoru. Pro po\u010D\u00E1te\u010Dn\u00ED f\u00E1zi rozkladu byl sledov\u00E1n jeho pr\u016Fb\u011Bh v\u00E1\u017Een\u00EDm nezreagovan\u00E9ho zbytku apatitu po p\u0159eru\u0161en\u00ED reakce. Z\u00EDskan\u00E1 data byla zpracov\u00E1na pomoc\u00ED vztah\u016F odvozen\u00FDch z modelu nezreagovan\u00E9ho j\u00E1dra pro zmen\u0161uj\u00EDc\u00ED se \u010D\u00E1stici. Bylo zji\u0161t\u011Bno, \u017Ee hodnota \u0159\u00E1du reakce vzr\u016Fst\u00E1 s teplotou od 0,6 do 1,0, hodnoty zd\u00E1nliv\u00E9 aktiva\u010Dn\u00ED energie se pohybuj\u00ED v rozmez\u00ED 27,5 - 41,2 kJ.mol-1 a rychlost rozpou\u0161t\u011Bn\u00ED apatitu Kola v kyselin\u011B trihydrogenfosfore\u010Dn\u00E9 je v po\u010D\u00E1te\u010Dn\u00ED f\u00E1zi rozkladu p\u0159ibli\u017En\u011B \u0159\u00E1dov\u011B pomalej\u0161\u00ED ne\u017E rychlost rozpou\u0161t\u011Bn\u00ED v kyselin\u011B dusi\u010Dn\u00E9." . "Studium kinetiky reakce apatitu Kola s kyselinou trihydrogenfosfore\u010Dnou" . . "3"^^ . . "apatite; phosphoric acid; reaction kinetics; dissolution"@en . "1-58053-837-1" . "RIV/60461373:22310/05:00013935!RIV06-MSM-22310___" . "Z(MSM6046137301)" . "The presentation is concerned with the dissolution of Kola apatite in phosphoric acid. The close fraction of Kola apatite particles of 0.20-0.25 mm was used. The all experiments were carried out in isothermal mixed batch reactor. For the initial phase of the decomposition the course of the reaction was observed by weighing of nonreacted rest of the solid phase after discontinuing of the reaction. The obtained data were interpreted by shrinking core model. It was found that the value of reaction order increases with temperature from 0.6 to 1.0, value of apparent activation energy proceeds from 67.5 to 75.1 kJ/mol and the initial rate of apatite dissolution in phosphoric acid is approximately 10 times slower than in nitric acid."@en . "4"^^ . . "1-4" . "[8BA2F116974D]" . "RIV/60461373:22310/05:00013935" . "V\u00EDdensk\u00FD, Jan" . . . "Pr\u00E1ce se zab\u00FDv\u00E1 rozpou\u0161t\u011Bn\u00EDm apatitu Kola kyselinou trihydrogenfosfore\u010Dnou. K m\u011B\u0159en\u00ED byla pou\u017Eita frakce \u010D\u00E1stic apatitu Kola o pr\u016Fm\u011Bru 0,20-0,25 mm. V\u0161echny experimenty byly provedeny v izotermn\u00EDm m\u00EDchan\u00E9m vs\u00E1dkov\u00E9m reaktoru. Pro po\u010D\u00E1te\u010Dn\u00ED f\u00E1zi rozkladu byl sledov\u00E1n jeho pr\u016Fb\u011Bh v\u00E1\u017Een\u00EDm nezreagovan\u00E9ho zbytku apatitu po p\u0159eru\u0161en\u00ED reakce. Z\u00EDskan\u00E1 data byla zpracov\u00E1na pomoc\u00ED vztah\u016F odvozen\u00FDch z modelu nezreagovan\u00E9ho j\u00E1dra pro zmen\u0161uj\u00EDc\u00ED se \u010D\u00E1stici. Bylo zji\u0161t\u011Bno, \u017Ee hodnota \u0159\u00E1du reakce vzr\u016Fst\u00E1 s teplotou od 0,6 do 1,0, hodnoty zd\u00E1nliv\u00E9 aktiva\u010Dn\u00ED energie se pohybuj\u00ED v rozmez\u00ED 27,5 - 41,2 kJ.mol-1 a rychlost rozpou\u0161t\u011Bn\u00ED apatitu Kola v kyselin\u011B trihydrogenfosfore\u010Dn\u00E9 je v po\u010D\u00E1te\u010Dn\u00ED f\u00E1zi rozkladu p\u0159ibli\u017En\u011B \u0159\u00E1dov\u011B pomalej\u0161\u00ED ne\u017E rychlost rozpou\u0161t\u011Bn\u00ED v kyselin\u011B dusi\u010Dn\u00E9."@cs . "2005-10-17+02:00"^^ . "Studium kinetiky reakce apatitu Kola s kyselinou trihydrogenfosfore\u010Dnou" . "22310" . . "Sedl\u00E1\u0159ov\u00E1, Ivona" . . "Kinetics study of reaction between Kola apatite and phosphoric acid"@en . "Studium kinetiky reakce apatitu Kola s kyselinou trihydrogenfosfore\u010Dnou"@cs . . . "Pl\u00E1t, Petr" . "545123" . . "\u010Cesk\u00E1 spole\u010Dnost chemick\u00E9ho in\u017Een\u00FDrstv\u00ED" .