Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Alumina supported CpTiCl"3 catalytic system
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 182 (1979), S. C33-C35 
    Details
    ISSN: 0022-328X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0022-328X(00)94396-1
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Investigation on catalytic systems containing nickel supported on silica and bonded with organic ligands and complexed by lewis acids
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 99 (1975), S. 465-474 
    Details
    ISSN: 0022-328X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0022-328X(00)86297-X
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Investigations on catalytic systems containing nickel supported on silica gel and bonded with organic ligands and complexed by lewis acids. II
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 117 (1976), S. 183-187 
    Details
    ISSN: 0022-328X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0022-328X(00)87270-8
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Gas phase reactions of acetaldehyde and formaldehyde in the presence of mixed solid catlysts containing silica and alumina (1974)
    Springer
    Reaction kinetics and catalysis letters 1 (1974), S. 461-465 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Пары ацеталвдегида и формальдегида пропускалиссь над смешанным твердым катализатором, содержашим кремний н алюминий в различных отношениях Al2O3/SiO2. Основными продуктами реакции были акролеин, ацетон и пропиональдегид. Среди продуктов реакции были также обнаружены небольшие количества метилэтилкетона. О бсуждается корреляция между обраэованием акролеина и кислотностью катлиэатора по Бреншнтеду. полагалось, что поверхность каталиэатора содержит помимо ионных, также и свободно-радикальные центры.
    Notes: Abstract Acetaldehyde and formaldehyde vapours wer passed over mixed solid oxide catlysts containing silica and alumina in different Al2O3/SiO2 ratios. Acrolein, acetone and propionaldehyde were the main reaction products. Small quantities of methyl ethyl ketone wer found to be present among the products. The correlation between acrolein formation and the Brønsted acidity of the catalysts is discussed. It is suggested that the catalyst surface contains in addition to ionic also free-radical centers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02074480
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Inves tigation of surface phenomena on solid catalysts by simultaneous thermogravimetry and DTA (1976)
    Springer
    Journal of thermal analysis and calorimetry 10 (1976), S. 331-337 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Application de la TG et de l'ATD simultanées à l'étude des phénomènes d'adsorption, de désorption et de réactions de surface sur des catalyseurs solides. Les mesures ont été effectuées avec des zéolites échangeuses d'ions de type NaX et X ainsi qu'avec des gels “Ketjen” silice-alumine traités par NaOH en présence de CO2. Les résultats quantitatifs permettent de donner une interprétation des phénomènes de surface et d'établir l'existence de divers centres actifs à la surface des catalyseurs. Dans le cas de l'adsorption de CO2 sur les zéolites de type X, la quantité de CO2 adsorbé est beaucoup plus faible que sur les zéolites de type NaX.
    Abstract: Zusammenfassung Thermogravimetrie und simultane DTA wurden zur Untersuchung der Adsorptions-, Desorptions-Erscheinungen und Oberflächenreaktionen an festen Katalysatoren eingesetzt. Die Messungen wurden and NaX und Zeolithen des Typs X sowie an Silika-Aluminiumoxidgelen “Ketjen” durchgeführt, welche mit Natriumhydroxid in Gegenwart von Kohlendioxid behandelt worden waren. Aufgrund der quantitativen Ergebnisse ist es möglich eine Deutung der Oberfiächenerscheinungen zu geben und die Existenz verschiedener aktiver Zentren an der Katalysatorenoberfläche nachzuweisen. Im Falle der Adsorption von Kohlendioxid an Zeolithen des Typs X ist die Menge des adsorbierten Kohlendioxids am Ionenaustauscher viel niedriger als am NaX.
    Notes: Abstract Thermogravimetry and simultaneous DTA were used to investigate the phenomena of adsorption, desorption and surface reactions on solid catalysts. The measurements were carried out with NaX and X-type ion-exchanged zeolites and silica-alumina gels (Ketjen) treated with sodium hydroxide in the presence of carbon dioxide. On the basis of the quantitative results it is possible to give an interpretation of the surface phenomena and to establish the existence of various active centres on the surfaces of the catalysts. In the case of the adsorption of carbon dioxide on X-type zeolites, the quantity of carbon dioxide adsorbed is much smaller on ion-exchanged zeolites than on NaX.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01909884
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Investigation of surface phenomena on solid catalysts by simultaneous thermogravimetry and DTA (1976)
    Springer
    Journal of thermal analysis and calorimetry 10 (1976), S. 339-356 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Application de la TG et de l'ATD à l'étude des phénomènes de sorption et des réactions de surface sur des catalyseurs solides. Les mesures ont été effectuées à l'aide de zéolites échangeuses cationiques de type NaX, X ainsi qu'à l'aide de gels silice-alumine “Ketjen” traités par NaOH en présence des hydrocarbures suivants: isobutane, isobutène, heptane, cyclohexane, benzène, toluène, éthylbenzène, cumène,n-propylbenzène,tert-butylbenzène, diphényle, naphtalène. Les résultats quantitatifs permettent de donner une interprétation des phénomènes de surface et d'établir l'existence de divers centres actifs à la surface des catalyseurs.
    Abstract: Zusammenfassung Die Thermogravimetrie wurde zusammen mit der DTA-Methode zur Untersuchung von Sorptionserscheinungen und Oberflächenreaktionen an festen Katalysatoren eingesetzt. Die Messungen wurden an NaX, an Kationenaustauscherzeoliten des Typs X und an Silika-Aluminiumoxid “Ketjen” durchgeführt, welche mit Natriumhydroxid in Gegenwart der Kohlenwasserstoffe Isobutan, Isobuten, Heptan, Cyclohexan, Benzol, Toluol, Äthylbenzol, Kumol,n-Propylbenzol,tert. Butylbenzol, Diphenyl und Naphthalin behandelt worden waren. Aufgrund quantitativer Ergebnisse ist es möglich die Oberflächenerscheinungen zu deuten und das Vorliegen verschiedener aktiver Zentren an der Katalysatorenoberfläche zu beweisen.
    Notes: Abstract Thermogravimetry, together with DTA, was used to investigate sorption phenomena and surface reactions on solid catalysts. The measurements were carried out with NaX and X-type cation-exchanged zeolites and silica-alumina (Ketjen) treated with sodium hydroxide, in the presence of such hydrocarbons as isobutane, isobutene, heptane, cyclohexane, benzene, toluene, ethylbenzene, cumene,n-propylbenzene,tert-butylbenzene, biphenyl and naphthalene. On the basis of the quantitative results, it is possible to give an interpretation of the surface phenomena and to prove the existence of various active centres on the surfaces of the catalysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01909885
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Investigation of surface phenomena on solid catalysts by simultaneous TG and DTA (1976)
    Springer
    Journal of thermal analysis and calorimetry 10 (1976), S. 65-72 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé La thermogravimétrie et l'analyse thermique différentielle ont été appliquées simultanément à l'étude des phénomènes d'adsorption, de désorption et de réactions en surface sur des zéolites échangeuses d'ions de type NaX et NaY et NaX ainsi que sur des gels de silice et d'alumine traités par la soude en présence d'eau. Les résultats quantitatifs permettent de proposer une interprétation des phénomènes de surface et d'établir l'existence de plusieurs centres actifs à la surface des catalyseurs. Dans les zéolites, l'eau est probablement liée par des liaisons oxygène-métal alcalin.
    Abstract: Zusammenfassung Thermogravimetrie und DTA wurden simultan zur Untersuchung von Adsorptions-, Desorptions- und Oberflächenreaktionserscheinungen an Zeolit-Typen von NaX und NaY und NaX Ionenaustausch sowie an mit Natriumhydroxid in Gegenwart von Wasser behandelten Silika- und Aluminiumoxid-hydroxid-gelen [eingesetzt. Aufgrund der quantitativen Ergebnisse war es möglich eine Deutung der Oberflächenerscheinungen zu geben und die Existenz verschiedener aktiver Zentren an der Oberfläche der Katalysatoren festzustellen. In Zeoliten ist Wasser wahrscheinlich durch Sauerstoff-Alkalimetallbindungen fixiert.
    Notes: Abstract Simultaneous thermogravimetry and DTA were used to investigate the phenomena of adsorption, desorption and surface reactions of water vapour on NaX and NaYtype and NaX-exchanged zeolites, and silica and alumina gels treated with sodium hydroxide. On the basis of the quantitative results, it was possible to give an interpretation of the surface phenomena and to establish the existence of various active centres on the surface of the catalysts. Water in zeolites is probably bound by oxygen-alkali metal bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179191
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Investigation of surface phenomena on solid catalysts by simultaneous TG and DTA (1976)
    Springer
    Journal of thermal analysis and calorimetry 10 (1976), S. 73-81 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé La thermogravimétrie et l'analyse thermique différentielle ont été appliquées simultanément à l'étude des phénomènes d'adsorption, de désorption et de réactions en surface sur des zéolites échangeuses d'ions de type NaX et X ainsi que sur des gels de silice-alumine “Ketjen” traités par l'hydroxide de sodium en présence d'ammoniaque. Les résultats quantitatifs permettent de proposer une interprétation des phénomènes de surface et d'établir l'existence de plusieurs centres actifs à la surface des catalyseurs. Dans le cas de l'adsorption de l'ammoniaque sur les gels de silice-alumine, la quantité d'ammoniaque adsorbée est beaucoup plus faible que sur les gels de silice-alumine traités par l'hydroxyde de sodium.
    Abstract: Zusammenfassung Simultane TG und DTA wurden zur Untersuchung von Adsorptions-, Desorptions- und Oberfiächenerscheinungen an Zeoliten der Ionenaustauschtypen NaX und X, sowie an mit Natriumhydroxid in Gegenwart von Ammoniak behandelten Silika-Aluminiumoxid-hydroxid-Gelen “Ketjen” eingesetzt. Aufgrund der quantitativen Ergebnisse ist es möglich eine Deutung der Oberflächenerscheinungen zu geben und die Existenz verschiedener aktiver Zentren an der Oberfläche der Katalysatoren festzustellen. Bei der Adsorption von Ammoniak an Silika-Aluminiumoxid-Gelen ist die Menge des adsorbierten Ammoniaks viel geringer als an Silika-Aluminiumoxid-Gelen, welche mit Natriumhydroxid behandelt wurden.
    Notes: Abstract Simultaneous TG and DTA were used to investigate the phenomena of adsorption, desorption and surface reactions of ammonia on NaX and X type exchanged zeolites and silica-alumina gels (Ketjen) treated with sodium hydroxide. On the basis of the quantitative results it is possible to give an interpretation of these surface phenomena and to establish the existence of various active centres on the surface of the catalysts. In the case of the adsorption of ammonia on silica-alumina gels, the quantity of adsorbed ammonia is much smaller than on silica-alumina gel treated with sodium hydroxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179192
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    “Superacid” alumina catalysts. Al2O3−P2O5 and Al2O3−AlCl3 catalysts for the isomerization and cracking of n-hexane (1978)
    Springer
    Reaction kinetics and catalysis letters 8 (1978), S. 25-28 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Был исследован эффект P2O5 и AlCl3 на поверхностные свойства окиси алюминия. Было найдено, что сублимация P2O5 и AlCl3 на поверхность окиси алюминия приводит к образованию сверхкислотных центров (H0≤−13,7) типа Льюиса, которые способны катализировать превращения н-гексана (изомеризация и крекинг) при 373 К.
    Notes: Abstract The effect of P2O5 and AlCl3 on the surface properties of alumina was studied. The sublimation of P2O5 and AlCl3 onto alumina surface results in the formation of superacid sites (H0≤−13.7) of the Lewis type, which catalyze the isomerization and cracking of n-hexane at 373 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02070342
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Catalytic properties of sodium-containing silica gel in n-heptane decomposition (1977)
    Springer
    Reaction kinetics and catalysis letters 7 (1977), S. 219-224 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Были исследованы реакции разложения н-гептана на катализаторе двуокиси кремния, содержащем различные количества ионов натрия. Основными продуктами были этилен, метан и пропилен, а также неразветвленные α-олефины. Сравнение экспериментальных данных с теоретическими указывает на свободно-радикальный механизм реакции.
    Notes: Abstract n-Heptane decomposition reactions on silica catalysts containing various amounts of sodium ions were studied. Ethylene, methane and propylene as well as unbrached α-olefins were the main reaction products. The comparison of the experimental and theoretical results suggests a free-radical reaction mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061842
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...