The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10...The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10.8666(7), c=15.814(1)? α=71.482(3), β=88.528(2), γ=78.448(2)°, V=1589.4(2)3, Dc=2.510g/cm3, Z=2,μ=2.138mm-1,λ(MoKα) = 0.71073 ? F(000)=1180. The final R and wR were 0.0396 and 0.1052 for 6626 observed reflections with I ≥2σ(I), respectively. The result of the structure analysis indicates that the [Mo5O15(PO4) (HPO4)]5- anion in the title compound consists of five edge-sharing or corner-sharing MoO6 octahedra and two corner-sharing PO4 tetrahedra. Each MoO6 octahedron adopts distorted octahedral geometry.展开更多
Yellow phosphorus tail gas is a resource used to produce bulk chemicals, such as formates, oxalates, and methanol after its pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen ...Yellow phosphorus tail gas is a resource used to produce bulk chemicals, such as formates, oxalates, and methanol after its pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen sulfide in yellow phosphorus tail gas was investigated on an ordinary activated carbon (OAC) and a home made catalyst KU2. The adsorption characteristics of phosphorus and hydrogen sulfide on the catalysts were studied in a fixed-bed system at different temperatures between 20℃ and 140℃ at atmospheric pressure. Both KU2 and OAC are proved to be effective catalysts in the catalytic oxidation process (COP) for H 2S and PH 3 removal. Purification efficiency increased with the increase of temperature and oxygen concentration in yellow phosphorus tail gases. Under optimized operation conditions, the product gases with a content of hydrogen sulfide<5 mg/m 3 and total phosphorus<5 mg/m 3 were obtained by using the COP process. Deactivated catalysts could be restored to the original activated state, even after several regenerations. A mathematical model was developed to simulate the experimental results and the mass transport coefficient from the experiment was evaluated. Good agreement between the experimental breakthrough curves and the model predictions was observed.展开更多
The new cluster[Mo_4(μ_3-O)_2O_4Cl_2(o-CH_3C_6H_4COO)_6]has been prepared by the reaction of molybdenum pentachloride and o-methylbenzoic acid.The crystal and molecular structures were determined by the X-ray diffrac...The new cluster[Mo_4(μ_3-O)_2O_4Cl_2(o-CH_3C_6H_4COO)_6]has been prepared by the reaction of molybdenum pentachloride and o-methylbenzoic acid.The crystal and molecular structures were determined by the X-ray diffraction method.It crystallizes in the orthorhombic space group Pnna with cell parameters:Mr=1361.6,a=13.792(4), b=17.957(3),c=20.974(9) ,V=5194(2) ~3,Z=4,Dc=1.74/cm^3,F(OOO)=2704,μ(MoK ) =11.0/cm,R=0.074.展开更多
The title compound Na5H37P6Mo18O90 1 (Mr=1658) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It crystallized in the monoclinic system, space group P21 with...The title compound Na5H37P6Mo18O90 1 (Mr=1658) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It crystallized in the monoclinic system, space group P21 with a =14.957(1), b =16.535(1), c = 16.159(1)?β=108.586(2)°, V=3787.85?, Dc =3.040g/cm3, Z=2,μ(MoK)=3.17mm-1, F(000)=3242. The final R and wR are 0.0500 and 0.1535 for 6643 observable reflections with I≥2?I), respectively. The result of structure analysis indicates that [Na(HPO4)2(PO4)4-Mo18 O49]5-anions 2 in 1 has the symmetry of C2V, in which each MoVIO6 octahedron is connected to adjacent PO4 tetrahedra through corner-sharing and to adjacent octahedra through edge-sharing or corner-sharing.展开更多
The crystal of the title compound with formula C36H44Cl2F3Mo2NO8S2 (Mr = 10002.62) crystallized in monoclinic, space group P21/n, with a = 9.6184(1), b = 22.3476(2), c = 20.7758(2) ?, ( = 90.172(1)(, V = 4465.70(7) ?3...The crystal of the title compound with formula C36H44Cl2F3Mo2NO8S2 (Mr = 10002.62) crystallized in monoclinic, space group P21/n, with a = 9.6184(1), b = 22.3476(2), c = 20.7758(2) ?, ( = 90.172(1)(, V = 4465.70(7) ?3, Z = 4, Dc = 1.491 g/cm3, F(000) = 2032, ( = 0.833 mm－1, Final R = 0.0665 and wR = 0.1650 for 5044 reflections with I >2.0( (I). The crystal structure revealed that the Mo2S2 core is planar, and the trifluoroacetic group acts as a bidentate bridging ligand and coordinates to two Mo atoms forming a five-membered ring plane, in which the Mo-Mo bond distance is 2.9222(9) ? and the O-C-O angle is 131.8(7)展开更多
基金The paper is financially supported by NSF of Fujian Province (JA00137) by FPNSFC(E0110013)
文摘The title compound (C5N5H41P2Mo5O30.5) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It belongs to triclinic system, space group P , with a=9.9645(6), b=10.8666(7), c=15.814(1)? α=71.482(3), β=88.528(2), γ=78.448(2)°, V=1589.4(2)3, Dc=2.510g/cm3, Z=2,μ=2.138mm-1,λ(MoKα) = 0.71073 ? F(000)=1180. The final R and wR were 0.0396 and 0.1052 for 6626 observed reflections with I ≥2σ(I), respectively. The result of the structure analysis indicates that the [Mo5O15(PO4) (HPO4)]5- anion in the title compound consists of five edge-sharing or corner-sharing MoO6 octahedra and two corner-sharing PO4 tetrahedra. Each MoO6 octahedron adopts distorted octahedral geometry.
基金"8 63"HighTechnologyPlanningGrant (No .2 0 0 4AA64 90 40 ) NationalNaturalScienceFund (No .5 3 0 0 2 3 45 ) NaturalScienceFundofYunnanProvince (No .2 0 0 2E0 0 0 9Q )
文摘Yellow phosphorus tail gas is a resource used to produce bulk chemicals, such as formates, oxalates, and methanol after its pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen sulfide in yellow phosphorus tail gas was investigated on an ordinary activated carbon (OAC) and a home made catalyst KU2. The adsorption characteristics of phosphorus and hydrogen sulfide on the catalysts were studied in a fixed-bed system at different temperatures between 20℃ and 140℃ at atmospheric pressure. Both KU2 and OAC are proved to be effective catalysts in the catalytic oxidation process (COP) for H 2S and PH 3 removal. Purification efficiency increased with the increase of temperature and oxygen concentration in yellow phosphorus tail gases. Under optimized operation conditions, the product gases with a content of hydrogen sulfide<5 mg/m 3 and total phosphorus<5 mg/m 3 were obtained by using the COP process. Deactivated catalysts could be restored to the original activated state, even after several regenerations. A mathematical model was developed to simulate the experimental results and the mass transport coefficient from the experiment was evaluated. Good agreement between the experimental breakthrough curves and the model predictions was observed.
基金Work supported by the National Natural Science Foundation of China(NNSFC)
文摘The new cluster[Mo_4(μ_3-O)_2O_4Cl_2(o-CH_3C_6H_4COO)_6]has been prepared by the reaction of molybdenum pentachloride and o-methylbenzoic acid.The crystal and molecular structures were determined by the X-ray diffraction method.It crystallizes in the orthorhombic space group Pnna with cell parameters:Mr=1361.6,a=13.792(4), b=17.957(3),c=20.974(9) ,V=5194(2) ~3,Z=4,Dc=1.74/cm^3,F(OOO)=2704,μ(MoK ) =11.0/cm,R=0.074.
文摘The title compound Na5H37P6Mo18O90 1 (Mr=1658) was synthesized under hydrothermal condition and its crystal structure was determined by X-ray diffraction. It crystallized in the monoclinic system, space group P21 with a =14.957(1), b =16.535(1), c = 16.159(1)?β=108.586(2)°, V=3787.85?, Dc =3.040g/cm3, Z=2,μ(MoK)=3.17mm-1, F(000)=3242. The final R and wR are 0.0500 and 0.1535 for 6643 observable reflections with I≥2?I), respectively. The result of structure analysis indicates that [Na(HPO4)2(PO4)4-Mo18 O49]5-anions 2 in 1 has the symmetry of C2V, in which each MoVIO6 octahedron is connected to adjacent PO4 tetrahedra through corner-sharing and to adjacent octahedra through edge-sharing or corner-sharing.
文摘The crystal of the title compound with formula C36H44Cl2F3Mo2NO8S2 (Mr = 10002.62) crystallized in monoclinic, space group P21/n, with a = 9.6184(1), b = 22.3476(2), c = 20.7758(2) ?, ( = 90.172(1)(, V = 4465.70(7) ?3, Z = 4, Dc = 1.491 g/cm3, F(000) = 2032, ( = 0.833 mm－1, Final R = 0.0665 and wR = 0.1650 for 5044 reflections with I >2.0( (I). The crystal structure revealed that the Mo2S2 core is planar, and the trifluoroacetic group acts as a bidentate bridging ligand and coordinates to two Mo atoms forming a five-membered ring plane, in which the Mo-Mo bond distance is 2.9222(9) ? and the O-C-O angle is 131.8(7)
基金Project(2007BAQ01055)supported by the National Key Technology R&D Program of ChinaProject(2011SCU11081)supported by the Sichuan University Funds for Young Scientists,ChinaProject(20120181120103)supported by Ph.D.Programs Foundation of the Ministry of Education of China
