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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.
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
Diphenylmethanol is the organic compound with the formula (C 6 H 5) 2 CHOH. Also known as benzhydrol , it is a white solid and the parent member of a large class of diaryl alcohols. Preparation
3,4-Dimethylphenol. Other names 4-Hydroxy-o-xylene. Identifiers CAS Number. ... Boiling point: 227 °C (441 °F; 500 K) Hazards GHS labelling: Pictograms. Signal word.
35.5 °C (309.7 K) Boiling point: 191.0 °C (464.2 K) 202.0 °C (475.2 K) ... Cresols commonly occur as either solids or liquids because their melting points are ...
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 ...
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
1.0076 g/cm 3: Melting point: −4.5 °C (23.9 °F; 268.6 K) ... 3-Ethylphenol is an organic compound with the formula C 2 H 5 C 6 H 4 OH. It is one of three isomeric ...