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Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod
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inquiryfactory Storage:Shading, sealed and preserved. Package:Grams, Kilograms Application:An organic synthetic intermediate used Transportation:According to customer request Port:Qingdao
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chromium
Conditions | Yield |
---|---|
With acetylen soot redn. at 1120°C; | 100% |
With acetylen soot redn. at 1120°C; | 100% |
With calcium carbide; potassium chloride byproducts: K2CrO4; forming vapour of K at 600°C; reaction temp. ca 400°C; K2CrO4 dissolving with water; purity: 99.5-99.8% Cr; | 90% |
Conditions | Yield |
---|---|
With potassium chloride; sodium chloride byproducts: MgCl2; 12 kg CrCl3, 3.5 kg Mg, 17.6 kg KCl and 12.4 kg NaCl mixed then heated in electric furnace at 800°C; formed MgCl2 dissolved and filtrated, remainder washed with water twice then with dild. HNO3; | 94.2% |
With potassium chloride In ethanol; water equimolar amts.; heating to melt; leaching with water, boiling with dild. aq. HNO3; purity: 99.55% Cr; | 75% |
With KCl In ethanol; water equimolar amts.; heating to melt; leaching with water, boiling with dild. aq. HNO3; purity: 99.55% Cr; | 75% |
chromium
Conditions | Yield |
---|---|
ignition in Mg-pot; 16g of Cr2O3, 20g of the alloy; | 90% |
Conditions | Yield |
---|---|
With hydrogen In further solvent(s) High Pressure; in perhydrocumol at 100 at;; | A 89% B n/a |
With H2 In further solvent(s) High Pressure; in perhydrocumol at 100 at;; | A 89% B n/a |
Conditions | Yield |
---|---|
equimolar amts.; Al content: 0.5%; | 82% |
equimolar amts.; Al content: 0.5%; | 82% |
110% of the theoretically necessary Al; Al content: 5%; | 73% |
copper
magnesium
aluminium
chromium
Conditions | Yield |
---|---|
chromium iron ore reduced with Al in presence of 0.1-20 % of Cu and 2 % of Mg; molten metal has great fluidity and small surface tension because of Mg and Cu so sepn. between metal and slag simple; | 82% |
chromium iron ore reduced with Al in presence of 0.1-20 % of Cu and 2 % of Mg; molten metal has great fluidity and small surface tension because of Mg and Cu so sepn. between metal and slag simple; | 82% |
Conditions | Yield |
---|---|
60.9g of Cr2O3, 24g of Ca, 10.8g of Al; | A n/a B 74.3% |
60.9g of Cr2O3, 24g of Ca, 10.8g of Al; | A n/a B 74.3% |
Conditions | Yield |
---|---|
96% of the theoretically necessary Al; 80% BaO2 refer to used Al amt.; Al content: <0.1%; | 74.3% |
96% of the theoretically necessary Al; 80% BaO2 refer to used Al amt.; Al content: <0.1%; | 74.3% |
96% of the theoretically necessary Al; 30% BaO2 refer to used Al amt.; Al content: <.1%; | 65% |
96% of the theoretically necessary Al; 30% BaO2 refer to used Al amt.; Al content: <.1%; | 65% |
Conditions | Yield |
---|---|
heating in a steel bomb; purity 99.86%; | 57% |
heating in a steel bomb; purity 99.86%; | 57% |
With hydrogen CrCl3 free from H2O; H2 flow and introducing of Na vapour; in china pot; | |
With H2 CrCl3 free from H2O; H2 flow and introducing of Na vapour; in china pot; |
CrCl2(tetrahydrofuran)2
trimethylaluminum
ethylaluminum dichloride
B
chromium
Conditions | Yield |
---|---|
In toluene soln. of Cr-complex and amine stirred at 22 °C to give blue suspn., Al(CH3)3 added; soln. filtered, stand at -35 °C for 1 h, mother liquor removed, crystals washed (hexane), dried (vac.); elem. anal.; | A 32% B n/a |
1,2-bis(dimethylphosphanyl)ethane
A
tris(bis(1,2-dimethylphosphino)ethane)bis(μ3-sulfido)tris(μ2-sulfido)trichromium
B
chromium
Conditions | Yield |
---|---|
In methanol to a soln. of CrCl2 and NaSH in methanol at -78°C excess of phosphine was added, warming slowly to room temp. over ca. 12 h; evapd. to dryness, recrystd. from toluene at -20°C; elem. anal.; | A 20% B n/a |
chromium
Conditions | Yield |
---|---|
In water at 60℃; for 2h; Electrolysis; |
chromium
Conditions | Yield |
---|---|
In water at 60℃; for 2h; Electrolysis; |
chromium
Conditions | Yield |
---|---|
Electrolysis; |
Conditions | Yield |
---|---|
With thiourea In water at 60℃; for 2h; Electrolysis; | |
With saccharin In water at 60℃; for 2h; Electrolysis; |
chromium
Conditions | Yield |
---|---|
at 60℃; for 2h; Electrolysis; | |
With gelatin at 60℃; for 0.166667h; Electrolysis; | |
With potassium dichromate at 60℃; for 0.5h; Electrolysis; |
chromium
Conditions | Yield |
---|---|
at 60℃; for 0.5h; Electrolysis; |
chromium
Conditions | Yield |
---|---|
at 60℃; for 0.5h; Electrolysis; |
dichromic acid
chromium
Conditions | Yield |
---|---|
reaction mechanism is given; | |
reaction mechanism is given; |
chromium
Conditions | Yield |
---|---|
With methyllithium; sodium carbonate ferrochromium oxidized by heating with lime and sodium carbonate to mixture of chromite-cromate, mixture reduced with FeSi, FeSi free from C; | |
With binding agent; chromium ore finely dispersed chromium ore mixed with ferrosilicon and binding agent and heated at 1300°C; | |
With binding agent; chromium ore finely dispersed chromium ore mixed with ferrosilicon and binding agent and heated at 1300°C; |
Conditions | Yield |
---|---|
With chromium ore chromium ore mixed with C, ferrosilicon and binding agent, briqueting, drying and heating at 1150-1300°C; |
chromium
Conditions | Yield |
---|---|
In not given Electrochem. Process; | 0% |
chromium
Conditions | Yield |
---|---|
In not given | 0% |
chromium
Conditions | Yield |
---|---|
decompn. of amalgame; | |
decompn. of amalgame; |
chromium
Conditions | Yield |
---|---|
In not given Electrochem. Process; neutral soln.; | 0% |
With sulfuric acid In not given Electrochem. Process; 1.5 mol/l CrSO4; 0.05 n H2SO4; anolyte: satd. Na2SO4; CO2 atm.; 30°C; 30 A/dm**2; | |
In not given Electrochem. Process; 0.77 mol/l, 1.4 mol/l or 1.6 mol/l; 30-35°C; 10.5 A/dm**2; under N2; | |
In not given Electrochem. Process; CO2 atm.; | |
In not given Electrochem. Process; 0.77 mol/l, 1.4 mol/l or 1.6 mol/l; 30-35°C; 10.5 A/dm**2; under N2; |
Conditions | Yield |
---|---|
With ammonium sulfate; sodium sulfate In not given Electrochem. Process; 15 g Cr/l; 42 g/l NH4(1+); 27 g/l Na(1+); 31°C; 7.0-8.6 A/dm**2; current efficiency 45%; asbestos diaphragm; | |
Electrochem. Process; | |
With ammonium sulfate In not given Electrochem. Process; 30 g Cr/l; 200-300 g/l (NH4)2SO4; 50-60°C; 8-12 A/dm**2; pH=2.3-3.0; anode: 99% Pb, 1% Ag alloy; |
chromium
Conditions | Yield |
---|---|
With H Electrochem. Process; redn. on cathode; | |
With H Electrochem. Process; redn. on cathode; |
chromium
Conditions | Yield |
---|---|
In not given pH=7; |
chromium
Conditions | Yield |
---|---|
In not given Electrochem. Process; pH=7; | |
In not given Electrochem. Process; pH=7; |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
With O2 In neat (no solvent, solid phase) 800°C; | 99% |
sintering in air above 800°C; |
Conditions | Yield |
---|---|
In melt Hf, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction; | 99% |
Conditions | Yield |
---|---|
In melt Ti, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction; | 99% |
Conditions | Yield |
---|---|
In melt Zr, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction; | 99% |
Conditions | Yield |
---|---|
In tetrahydrofuran; trifluoroacetic acid Electrolysis; sealed reactor, 1:1 volume ratio of solvents, at 0.001 A and 8 V at 343-353 K; crystd. on hstorage at 378 K over P2O5 for 3 d; | 99% |
chromium
acetonitrile
trifluoroacetic acid
[Cr3(μ3-O)(CF3COO)6(CH3COOH)2(CF3COO)]
Conditions | Yield |
---|---|
In acetonitrile; trifluoroacetic acid Electrolysis; sealed reactor, 1:1 volume ratio of solvents, at 0.01 A and 8 V at 343-353 K; crystd. on hstorage at 378 K over P2O5 for 3 d; | 99% |
chromium
1-vinyl-2-hydroxymethyl(benz)imidazole
Conditions | Yield |
---|---|
With tetrabutylammonium perchlorate In acetonitrile Electrolysis; Ar; Pt cathode, metal sacrificial anode, c.d. 10-30 mA/cm**2, electrolyte 0.1-0.2 M tetrabutylammonium perchlorate; elem. anal.; | 99% |
Conditions | Yield |
---|---|
With O2 In neat (no solvent, solid phase) 800°C; | 99% |
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With O2 In neat (no solvent, solid phase) 800°C; | 99% |
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h); | 99% |
Conditions | Yield |
---|---|
With Et4NBr In acetonitrile Electrolysis; electrolysis at 60°C in a cell with a chromium anode and a nickel catode, surface area of 100 and 35 cm**2, resp.; 0.1 N Et4NBr in MeCN as supporting electrolytecurrent density of 15 mA cm**-2; after electrolysis completion, mixt. diluted with water and extd. with CHCl3, dried over MgSO4, evapd; purified by pptn. with petroleum ether from a chlooform soln.; identified by elem. anal., IR, mass spectra; | 97% |
In neat (no solvent) byproducts: H2; Electrolysis; exclusion of air; addn. of acetylacetone and (n-Bu4N)Br to electrolysisautoclave with chromium anode, current 100 mV, initial voltage of 8 V, electrolysis for 27 h; concn (high vac.), recrystn., sublimation (100°C/1E-3 Torr); | 94% |
In acetonitrile Electrolysis; electrolysis (Pt-cathode, Cr-anode) of a soln. of 2,4-pentanedione/Bu4NFB4 (0.1M), 3-4 Ah, treated with ether/acetone, pptn.; filtered, dried in vacuum; | 91% |
With (C4H9)4NBF4 In acetonitrile Electrolysis; reaction of Cr anode with 30% soln. of acetylacetone in CH3CN with added 0.1 M Bu4NBF4, Pt cathode; addn. of ether-acetone mixture;; pptn.; drying in vacuo; crystallization from benzene-CH3CN mixture;; | 91% |
With tert-butylammonium hexafluorophosphate(V) In acetylacetone Electrochem. Process; tetra-n-butylammonium hexafluorophosphate added to dry acetylacetone, Crelectrode, 300 V, 10-50 mA, ca. 10 h; evapd. under vac., solid washed twice with hexane and twice with petroleum ether; | 71.7% |
Conditions | Yield |
---|---|
In melt Electric Arc; ingots by arc melting of Ni(75)-Cr(2.5)-Al(20)-W(2.5) (at%), several remelts, sealed in silica tube under vac. with partial pressure of Ar, 1573K (2 weeks), furnace cooled to 1523K, 4 weeks, 1273K (6 weeks), quenched in iced water; electron microscopy, electron probe microanalysis, x-ray diffraction; | A 95% B 5% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) byproducts: KCrP2S7, KCrP2S7; Cr, P2S5, K2S and S sealed under vac. in silica tube, heated up to 200°C for 4 h, maintained at this temp. for 12 h, temp. raised to 550°C and kept for 7 d; cooled to room temp. (2°C/h); | 95% |
Conditions | Yield |
---|---|
In cellosolve=2-ethoxyethanol Electrochem. Process; soln. of Et4NBr, carbon steel cathode and Cr anode (N2); centrifugation, washing of ppt. (ethanol, twice), drying (vacuum); elem. anal.; | 93.5% |
chromium
glycine
tetrakis(glycine)tetrabromodichromium(II) tetrahydrate
Conditions | Yield |
---|---|
With HBr In water (Ar or N2); Cr added to HBr soln., stirred for 3 h, hot ligand soln. added; ppt. warmed to 70°C to dissolved it, filtered, allowed to cool slowly overnight, filtered in air, washed with EtOH, second drop pptd. from filtrate; elem. anal.; | 93.5% |
N,N'-(ethane-1,2-diyl)bis(1-(2-methoxyphenyl)methanimine)
water
chromium
Conditions | Yield |
---|---|
In ethanol for 2h; Reflux; | 93% |
Conditions | Yield |
---|---|
In water under Ar atm. using Schlenk techniques; to soln. of CF3SO3H in H2O Cr chips (treated with HClO4 and H2O) added in Schlenk tube; mixt. heated to 40°C; stirred for 7 ds; solvent evapd. (vac.); | 91.2% |
Conditions | Yield |
---|---|
In water; dimethyl sulfoxide Electrochem. Process; 20 h electrochem. oxidn. at 3.5 V, 100 mA; soln. warmed to ca 50°C with stirring; pptn. in 30 min; filtering; washing with diethyl ether; vac. drying; elem. anal.; | 91% |
In diethyl ether; dimethyl sulfoxide Electrochem. Process; 7 h electrochem. oxidn. at 6 V, 50 mA; soln. warmed to ca 50°C with stirring; filtering; washing with diethyl ether; vac. drying; |