Showing papers on "2,6-Xylenol published in 1989"
TL;DR: In this paper, the synthesis of 2,6-xylenol by alkylation of phenol was investigated using iron catalysts modified with chromium, silicon, potassium or caesium ions.
50 citations
TL;DR: In this paper, the acidity of the catalysts was measured by n-butylamine titration and by cyclohexanol dehydration at 523 K, which was also used as an acidity index.
47 citations
TL;DR: In this article, the synthesis of 2,6-xylenol by alkylation of phenol was investigated using iron catalysts modified with chromium, silicon, potassium or caesium ions.
Abstract: Iron catalysts modified with chromium, silicon, potassium or caesium ions were investigated in the synthesis of 2,6-xylenol by alkylation of phenol wit
1 citations
Patent•
05 Oct 1989
TL;DR: In this article, a vapor phase catalytic reaction of phenol with methanol in the presence of a metal oxide was carried out to obtain the subject compounds, purifying the compounds and thermally decomposing the discharged high-boiling substance at a specific temperature.
Abstract: PURPOSE:To recover the subject substances in the form of a valuable components such as phenol and to achieve the resource-saving effect, by carrying out vapor-phase catalytic reaction of phenol with methanol in the presence of a metal oxide to obtain the subject compounds, purifying the compounds and thermally decomposing the discharged high-boiling substance at a specific temperature. CONSTITUTION:Phenol and methanol are subjected to vapor-phase catalytic reaction at 250-600 deg.C in the presence of a metal oxide. The gaseous by-products, unreacted methanol, unreacted phenol, produced water and o-cresol and/or 2,6-xylenol are separated from the obtained reaction product. The high-boiling substances separated in the above separation process are decomposed by heating at >=300 deg.C, preferably about 320-350 deg.C to recover phenol, o-cresol and 2,6-xylenol. The heat source for the above heating method is especially preferably an organic thermal medium and the thermal decomposition is carried out usually for 2-4hr.