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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F14%3A00427877%21RIV15-GA0-61388955
rdf:type
n5:Vysledek skos:Concept
dcterms:description
Titanium containing extra-large pore zeolite CIT-5 (IZA code: CFI) was successfully prepared by direct synthesis using Cab-O-Sil M5 and titanium(IV) butoxide in the presence of LiOH. N-Methylsparteinium hydroxide was used as a structure directing agent. The product crystallized into thin plate crystals with an approximate size of 20 x 5 x 0.2 mu m. The lowest achieved Si/Ti ratio was 23. The necessary duration of hydrothermal synthesis increased with increasing concentration of Ti in the reaction mixture from 11 days (Si/Ti = 63 in product) to 17 days (Si/Ti = 36) at 155 degrees C. Prepared Ti-CFI samples exhibit BET surface areas in the range of 308-346 m(2)/g and micropore volumes of 0.094-0.097 cm(3)/g. CFI possesses extralarge pores (14-ring, 7.2 x 7.5 A) accessible for bulky molecules, therefore, Ti-CFI is a useful catalyst for epoxidation of double bonds in bulky molecules used in perfumery and pharmacy. The Ti-CFI samples proved to be catalytically active in epoxidation of 1-octene, cyclooctene, cv-pinene, and norbornene with hydrogen peroxide as oxidation agent. Titanium containing extra-large pore zeolite CIT-5 (IZA code: CFI) was successfully prepared by direct synthesis using Cab-O-Sil M5 and titanium(IV) butoxide in the presence of LiOH. N-Methylsparteinium hydroxide was used as a structure directing agent. The product crystallized into thin plate crystals with an approximate size of 20 x 5 x 0.2 mu m. The lowest achieved Si/Ti ratio was 23. The necessary duration of hydrothermal synthesis increased with increasing concentration of Ti in the reaction mixture from 11 days (Si/Ti = 63 in product) to 17 days (Si/Ti = 36) at 155 degrees C. Prepared Ti-CFI samples exhibit BET surface areas in the range of 308-346 m(2)/g and micropore volumes of 0.094-0.097 cm(3)/g. CFI possesses extralarge pores (14-ring, 7.2 x 7.5 A) accessible for bulky molecules, therefore, Ti-CFI is a useful catalyst for epoxidation of double bonds in bulky molecules used in perfumery and pharmacy. The Ti-CFI samples proved to be catalytically active in epoxidation of 1-octene, cyclooctene, cv-pinene, and norbornene with hydrogen peroxide as oxidation agent.
dcterms:title
Synthesis and catalytic properties of titanium containing extra-large pore zeolite CIT-5 Synthesis and catalytic properties of titanium containing extra-large pore zeolite CIT-5
skos:prefLabel
Synthesis and catalytic properties of titanium containing extra-large pore zeolite CIT-5 Synthesis and catalytic properties of titanium containing extra-large pore zeolite CIT-5
skos:notation
RIV/61388955:_____/14:00427877!RIV15-GA0-61388955
n3:aktivita
n15:I n15:P
n3:aktivity
I, P(GBP106/12/G015)
n3:cisloPeriodika
MAY 2014
n3:dodaniDat
n6:2015
n3:domaciTvurceVysledku
n11:7016662 n11:7350678 n11:5987091
n3:druhVysledku
n12:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
48964
n3:idVysledku
RIV/61388955:_____/14:00427877
n3:jazykVysledku
n18:eng
n3:klicovaSlova
zeolite CIT-5; titanosilicate; epoxidation
n3:klicoveSlovo
n9:epoxidation n9:zeolite%20CIT-5 n9:titanosilicate
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[31D89801729D]
n3:nazevZdroje
Catalysis Today
n3:obor
n4:CF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n14:GBP106%2F12%2FG015
n3:rokUplatneniVysledku
n6:2014
n3:svazekPeriodika
227
n3:tvurceVysledku
Kubů, Martin Čejka, Jiří Přech, Jan
n3:wos
000332412900013
s:issn
0920-5861
s:numberOfPages
7
n13:doi
10.1016/j.cattod.2014.01.003