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The methylation is carried out by contacting gaseous phenol and methanol at elevated temperatures in the presence of a solid acid catalyst: [2] [3] C 6 H 5 OH + 2 CH 3 OH → (CH 3) 2 C 6 H 3 OH + 2 H 2 O. Challenges associated with the production is the similarity of the boiling points of cresols and this xylenol.
1.103 g/cm 3: Melting point: 69 °C (156 °F; 342 K) Boiling point: 298 °C (568 °F; 571 K) Solubility in water. 0.5 g/L (20 °C) Magnetic susceptibility ...
Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: 298.9 44 –3.9 Acetic acid: 1.04 117.9 3.14 16.6 –3.90 K b [1] K f [2] Acetone: 0.78 56.2 1.67 –94.8 K b [3] Benzene: 0.87 80.1 2.65 5.5 –5.12 K b & K f [2 ...
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
3,4-Dimethylphenol. Other names ... Boiling point: 227 °C (441 °F; 500 K) Hazards GHS labelling: Pictograms. ... Flash point: 110 °C (230 °F; 383 K) ...
These residue contains a few percent by weight of xylenols as well as cresols and phenol. The main xylenols in such tar are the 3,5-, 2,4, and 2,3- isomers. 2,6-Xylenol is produced by methylation of phenol using methanol in the presence of metal oxide catalysts: [1] C 6 H 5 OH + 2 CH 3 OH → (CH 3) 2 C 6 H 3 OH + 2 H 2 O
[106-44-5] mixture of cresols (tricresol): [1319-77-3] Properties Density and phase: 1.05 g/cm 3, solid 1.03 g/cm 3, liquid 1.02 g/cm 3, liquid Solubility in pure water at 20−25 °C 2.5 g/100 ml 2.4 g/100 ml 1.9 g/100 ml soluble in strongly alkaline water Melting point: 29.8 °C (303.0 K) 11.8 °C (285.0 K) 35.5 °C (309.7 K) Boiling point
The acidity of the methylene group in diphenylmethane is due to the weakness of the (C 6 H 5) 2 CH–H bond, which has a bond dissociation energy of 82 kcal mol −1 (340 kJ mol −1). [5] This is well below the published bond dissociation energies for comparable C–H bonds in propane , where BDE((CH 3 ) 2 CH–H)=98.6 kcal mol −1 , and ...