A study of catalytic hydrodenitrification by the use of ammonia chemical ionization GC/MS and GC/MS/MS

Džidić, I.; Balicki, Michael D.; Petersen, H. A.; Nowlin, J.; Evans, William E.; Siegel, H. S.; Hart, Haskell V.

doi:10.1021/ef00027a005

Cited by 5 publications

(5 citation statements)

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“…1861, 1824 [a] [N,NЈ-bis(2-sulfidoethyl) 1995, 1871, 3.35 -diazacyclooctane]NiW(CO) 4 (2) 1853, 1819 [a] 2006, 1883, Ni[Ph 2 P(CH 2 ) 2 S] 2 Mo(CO) 4 (3) 2.998 1844 [b] [(dppe)Ni(pdt)Mo(CO) 4 ] (7) 1997 [a] Measured in DMF (Ref. [5] ).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[1,2] The effectiveness of these heterogeneous catalysts has inspired the synthesis of molecular analogues, one promising route to which involves combination of Mo/W(CO) n electrophiles with square-planar Ni II alkylthiolates. Indeed, complexes of the type [Ni II L 2 (SR) 2 ] are versatile metalloligands with basicities comparable to that of 2,2Ј-bipyridine. [3] For example, Ni II diaminodithiolates have been incorporated into several multinuclear species, [4] including [N,NЈ-bis(2-sulfidoethyl)diazacyclooctane]NiM(CO) 4 (1: M = Mo; 2: M = W), [5] which features a topical NiS 2 M core ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Nickel‐Molybdenum and Nickel‐Tungsten Dithiolates: Hybrid Models for Hydrogenases and Hydrodesulfurization

2015

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nickel‐Molybdenum and Nickel‐Tungsten Dithiolates: Hybrid Models for Hydrogenases and Hydrodesulfurization

2015

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“…While there are several reports of quinoline complexes, − and catalytic HDN studies invariably examine quinoline and indole substrates, ,− complexes of their hydrogenated derivatives tetrahydroquinoline or indoline are scarce. ,, In this report, we describe the preparation and properties of tantalum aryloxide complexes containing the amido ligands of tetrahydroquinoline and indoline, namely tetrahydroquinolinyl ([NC 9 H 10 ] - , the anion of tetrahydroquinoline) and indolinyl ([NC 8 H 8 ] - , the anion of indoline), Figure . (The amide of indoline, indolinyl [NC 8 H 8 ] - , is not to be confused with the amide of indole, the [NC 8 H 6 ] - ligand.)…”

Section: Introductionmentioning

confidence: 99%

Tetrahydroquinolinyl Amido and Indolinyl Amido Complexes of Tantalum as Models for Substrate−Catalyst Adducts in Hydrodenitrogenation Catalysis

et al. 1996

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The reactions of TaCl5 with Me3SiNC9H10 or LiNC9H10, where [NC9H10]- = tetrahydroquinolinyl (the amido anion of tetrahydroquinoline), afford selective preparative routes to the complete series of amido halide complexes of tantalum(V) Ta(NC9H10) n Cl5 - n for n = 1−5 (compounds 1−5, respectively). The monokis(tetrahydroquinolinyl) complex is isolated as an ether adduct Ta(NC9H10)Cl4(OEt2) while the complexes Ta(NC9H10) n Cl5 - n (n = 2−5) are found to be base-free, monomeric species. The related complexes of indolinyl [NC8H8]- (the amido anion of indoline), Ta(NC8H8) n Cl5 - n (THF) for n = 1 (6) or 2 (7), have been prepared from TaCl5, Me3SiNC8H8, and THF. An X-ray structural determination of Ta(NC9H10)2Cl3 (2) reveals that it adopts a trigonal bipyramidal geometry with equatorial amido ligands that are closer to lying parallel (within) than perpendicular to the TBP equatorial plane. Routes to mixed-ligand aryloxide−amide complexes have been developed from either aryloxide or amido precursors but not from both. Thus, Ta(NC9H10)(OAr)Cl3(OEt2) (8), where Ar = 2,6-C6H3 iPr2, and Ta(NC8H8)(OAr)Cl3(OEt2) (9) are available from reacting Ta(OAr)Cl4(OEt2) with Me3SiNC9H10 and Me3SiNC8H8, respectively, while Ta(NC9H10)2(OAr)2Cl (10) is available from Ta(NC9H10)2Cl3 (2) and excess LiOAr·OEt2. The alkyl derivatives Ta(NC9H10)(OAr)Me2Cl (11), Ta(NC9H10)(OAr)Et2Cl (12), Ta(NC9H10)2(OAr)2Me (13), and Ta(NC9H10)Me2Cl2 (14) are prepared from AlR3 or ZnR2 reagents and the appropriate precursor. Thermolyzing compounds 4, 5, and 11−14 in solution afforded no evidence for the formation of any η2(N,C)-heterocyclic complexes arising from metalation of a NC9H10 ligand.

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“…Nitrogen atoms exist substantially in aromatic rings and they are thought to be removed by the nuclear hydrogenation of aromatic rings. − The distinct decreases in denitrogenation support the conclusion that the nuclear hydrogenation is suppressed by the addition of HHAP or HAP. This is a solid evidence to show the suppression of the nuclear hydrogenation.…”

Section: Resultsmentioning

confidence: 80%

Heavy Oil Hydroprocessing with the Addition of Hydrogen-Donating Hydrocarbons Derived from Petroleum

Kubo

Higashi²,

Ohmoto³

et al. 1996

Energy Fuels

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The effects of the addition of hydrogen-donating hydrocarbons derived from petroleum were tested in a pilot plant (0.01 bbl/day) equipped with a downflow fixed bed reactor for the hydroprocessing of atmospheric residues, and the following results were obtained: (1) HHAP (partly hydrogenated product of a highly aromatic heavy fraction from petroleum) and HAP (highly aromatic heavy fraction prior to the hydrogenation to produce HHAP) were effective to reduce coke formation and hydrogen consumption. (2) A particular and effective mechanism resulting from the configurations of the additives was found to be initiated by the addition of these additives. (3) This mechanism was substantiated by detailed analyses of the products.

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A study of catalytic hydrodenitrification by the use of ammonia chemical ionization GC/MS and GC/MS/MS

Cited by 5 publications

References 0 publications

Nickel‐Molybdenum and Nickel‐Tungsten Dithiolates: Hybrid Models for Hydrogenases and Hydrodesulfurization

Nickel‐Molybdenum and Nickel‐Tungsten Dithiolates: Hybrid Models for Hydrogenases and Hydrodesulfurization

Tetrahydroquinolinyl Amido and Indolinyl Amido Complexes of Tantalum as Models for Substrate−Catalyst Adducts in Hydrodenitrogenation Catalysis

Heavy Oil Hydroprocessing with the Addition of Hydrogen-Donating Hydrocarbons Derived from Petroleum

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