Showing papers on "Ammonium tetrathiomolybdate published in 1999"
TL;DR: In this article, the catalytic activity of unsupported Mo sulfide (MoS2 like) catalysts which were prepared by a new and simple method comprised of decomposing ammonium tetrathiomolybdate (ATTM) in an organic solvent with added water under H2 pressure was reported.
37 citations
Patent•
06 Oct 1999TL;DR: In this paper, a new and simple method of decomposing ammonium tetrathiomolybdate (ATTM) in an organic solvent with added water under H 2 pressure was proposed.
Abstract: The present invention is a new and simple method of decomposing ammonium tetrathiomolybdate (ATTM) in an organic solvent with added water under H 2 pressure. Model compound reactions of 4-(1-naphthylmethyl)bibenzyl (NMBB) were carried out at 350-425° C. under H 2 pressure in order to examine the activity of the Mo sulfide catalysts generated from ATTM with and without added water for C--C bond cleavage and hydrogenation of aromatic ring. The Mo sulfide catalysts generated from ATTM with added water were much more effective for C--C bond cleavage and hydrogenation of aromatic moieties at 350-425° C. than those from ATTM alone. Two-step tests revealed that the addition of water is effective for generating highly active Mo sulfide catalyst from ATTM, but water itself does not promote catalytic conversion. Removal of water after the decomposition of ATTM with added water at 350-400° C. under H 2 pressure by hot purging gives highly active Mo sulfide catalyst.
32 citations
TL;DR: A polyaniline-molybdenum trisulfide composite has been prepared by chemical polymerization from an acidic (1 M HCl) aqueous solution containing aniline and ammonium tetrathiomolybdate as discussed by the authors.
Abstract: A novel polyaniline-molybdenum trisulfide composite has been prepared by chemical polymerization from an acidic (1 M HCl) aqueous solution containing aniline and ammonium tetrathiomolybdate. The presence of molybdenum trisulfide in the polyaniline matrix induces morphological change to the polymer as evidenced by scanning electron micrographs. X-ray diffraction and differential scanning calorimetry indicate that polyaniline-molybdenum trisulfide is slightly less crystalline than polyaniline-HCl. X-ray photoelectron spectroscopy (XPS) and elemental analysis have been used to confirm the presence of molybdenum trisulfide in the polymer matrix. The XPS data also confirm that molybdenum trisulfide and tetrathiomolybdate anions are present with polyaniline to form a new inorganic-organic composite.
25 citations
TL;DR: In this article, a new Mo2O2(μ-S)2(C6H4O7)2]6− core with tridentate terminal citrate ligands was obtained by reaction of ammonium tetrathiomolybdate and ammonium citrate and isolated as mixed ammonium/potassium salt.
17 citations
TL;DR: In this paper, a sol-gel method using aluminium-tri-sec-butylate (ASB) in 2-butanol and ammonium tetrathiomolybdate (ATTM) catalysts was presented.
Abstract: MoS2-alumina catalysts, with various amounts of Mo, were prepared by a sol-gel method using aluminium-tri-sec-butylate (ASB) in 2-butanol and ammonium tetrathiomolybdate (ATTM). After hydrolysis, the dried gels were sulfided and tested in hydrodesulfurization (HDS) of thiophene (T) or dibenzothiophene (DBT). This method of preparation allows to increase the DBT conversion by reference to results obtained on classically sulfided solgel oxides.
3 citations