Removal of Escherichia coli from synthetic turbid water using titanium tetrachloride and zirconium tetrachloride as coagulants

2019 ◽  
Vol 163 ◽  
pp. 358-365 ◽  
Author(s):  
Ahmad Jonidi Jafari ◽  
Mona Mahrooghi ◽  
Mehrdad Moslemzadeh
Keyword(s):  
Escherichia Coli ◽  
Titanium Tetrachloride ◽  
Turbid Water ◽  
Zirconium Tetrachloride

CO-ORDINATION COMPLEXES OF TITANIUM (IV) HALIDES: II. PREPARATION AND INFRARED SPECTRA OF THE COMPLEXES OF TITANIUM TETRACHLORIDE WITH DIESTERS OF α,ω-DICARBOXYLIC ACIDS AND COMPARISON WITH ANALOGOUS COMPLEXES OF ZIRCONIUM TETRACHLORIDE AND TIN TETRACHLORIDE

1961 ◽  
Vol 39 (11) ◽  
pp. 2343-2352 ◽  
Author(s):  
Ernest Rivet ◽  
Real Aubin ◽  
Roland Rivest
Keyword(s):  
Molecular Weight ◽  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Complex Molecule ◽  
Dicarboxylic Acids ◽  
The Other ◽  
Zirconium Tetrachloride ◽  
Melting Points ◽  
Zirconium Complexes ◽  
Tin Tetrachloride

Co-ordination complexes between diesters of α,ω-dicarboxylic acids and titanium tetrachloride, tin tetrachloride, and zirconium tetrachloride have been prepared. The analytical results, the infrared spectra, the melting points, and the molecular-weight determinations indicate that for the titanium and zirconium complexes, two types of complexes are obtained, one having a general formula MX4•1 diester in which chelate rings from five to nine atoms are formed and the other one, 2MX4•1 diester in which there are two 4-membered rings per complex molecule. With tin tetrachloride only one type of complex is formed, which has two tin tetrachlorides and two diesters per complex molecule.

CO-ORDINATION COMPLEXES OF GROUP (IV) HALIDES: PREPARATION AND INFRARED SPECTRA OF THE CO-ORDINATION COMPOUNDS OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE, ZIRCONIUM TETRACHLORIDE, TIN TETRACHLORIDE, AND BORON TRICHLORIDE WITH ETHYL CYANOACETATE AS LIGAND

1964 ◽  
Vol 42 (5) ◽  
pp. 1079-1083 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Ethyl Cyanoacetate ◽  
Group Iv ◽  
Membered Ring ◽  
Zirconium Tetrachloride ◽  
Experimental Conditions ◽  
Boron Trichloride ◽  
Titanium Tetrabromide ◽  
Tin Tetrachloride

Co-ordination compounds between ethyl cyanoacetate and boron trichloride, titanium tetrabromide, and tetrachlorides of titanium, zirconium, and tin have been prepared. The analytical results indicate that under similar experimental conditions, 1:1 addition compounds are obtained in each case. On the basis of infrared spectra it has been postulated that the compounds obtained are six-membered ring chelates, satisfying the most common co-ordination number six for the elements of group IV.

N,N'-Bis(trimethylsilyl)benzamidinato-Koniplexe von Titan und Zirkon. Die Kristallstrukturen von [C6H5-C(NSiMe3)2MCl3]2; M = Ti, Zr / N,N'-Bis(trimethylsilyl)benzamidinato Complexes of Titanium and Zirconium. The Crystal Structures of [C6H5-C(NSiMe3)2MCl3 ]2 ; M = Ti, Zr

1988 ◽  
Vol 43 (12) ◽  
pp. 1611-1615 ◽  
Author(s):  
Dieter Fenske
Keyword(s):  
Titanium Tetrachloride ◽  
Zirconium Tetrachloride ◽  
Space Group ◽  
Bond Lengths ◽  
Titanium Compound ◽  
Metal Atoms ◽  
Distorted Octahedral ◽  
Structure Determinations ◽  
Moisture Sensitive ◽  
Nitrogen Bond

Abstract The N,N'-bis(trimethylsilyl)benzamidinato complexes [C6H5 -C(NSiMe3)2MCl3]2(M = Ti. Zr) have been prepared by the reactions of N,N,N'-tris(trimethylsilyl)benzamidine [C6H5-C(NSiMe3)N(SiMe3)2] with titanium tetrachloride, and zirconium tetrachloride, respec-tively. The compounds form moisture sensitive, dark red (Ti) and white (Zr) crystals, which were characterized by crystal structure determinations. [C6H5-C(NSiMe3)2TiCl3]2 : space group P21/rc. Z = 2, 4373 observed independent reflexions, R = 0.034. Lattice dimensions (-90 °C): a - 959.0(8); b = 1196.5(8); c = 1770.9(11) pm; β = 93.79(4)°. [C6H5-C(NSiMe3)2ZrCl3]2 : space group P21/n. Z = 2, 3160 observed independent reflexions, R = 0.031. Lattice dimensions (-90 °C): a = 971.6(7); b = 1222.2(9); c = 1792.9(10) pm; β = 93.51(5)°. Both complexes crystallize isotypically, forming centrosymmetric dimeric molecules via chloro bridges with bond lengths of 242.0 and 253.8 pm (Ti), and of 253.7 and 264.9 pm (Zr). The metal atoms complete their distorted octahedral surroundings with two chlorine ligands and the nitrogen atoms of the chelating amidinato ligand. The N atoms of the amidinato group are in equatorial and axial positions. This accounts for the different metal-nitrogen bond lengths of 207 pm (ax) and 199 pm (eq) in the titanium compound and 219 pm (ax) and 214 pm (eq) in the zirconium complex.

Arylimido zirconium and titanium complexes: characteristic structures and application in ethylene polymerization

2016 ◽  
Vol 71 (10) ◽  
pp. 1019-1023 ◽  
Author(s):  
Shifang Yuan ◽  
Lijing Wang ◽  
Yupeng Hua ◽  
Jing Zhang ◽  
Wen-Hua Sun
Keyword(s):  
Solid State ◽  
Ethylene Polymerization ◽  
Titanium Tetrachloride ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Zirconium Tetrachloride ◽  
Titanium Complexes ◽  
Titanium Complex ◽  
X Ray ◽  
Catalytic Activities

AbstractDimeric anilidolithium (ArHNLi·Et2O)2 (Ar=2,6-iPr2C6H3) reacted with zirconium tetrachloride in THF to give the heterometallic zirconium–lithium complex [(Et2O)2Li(μ-Cl)2(ArHN)(ArN=)Zr(μ-Cl)]2 (C1) and with titanium tetrachloride in toluene to give the titanium complex [(ArN=)TiCl2·(Et2O)2] (C2) each in good isolated yields. Their molecular structures in the solid state were confirmed by X-ray diffraction analysis. Upon activation with methylaluminoxane, both arylimido zirconium and titanium complexes exhibited good catalytic activities toward ethylene polymerization.

Sign in / Sign up

Export Citation Format

Share Document