Showing papers on "o-Cresol published in 2013"
20 Jun 2013-World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering
TL;DR: In this article, the authors studied the effect of two kinds of aqueous solvents: methanol and acetone solutions, on the performance of coal tar extraction.
Abstract: Coal tar is a liquid by-product of the process of coal gasification and carbonation. This liquid oil mixture contains various kinds of useful compounds such as phenol, o-cresol, and p-cresol. These compounds are widely used as raw material for insecticides, dyes, medicines, perfumes, coloring matters, and many others. This research needed to be done that given the optimum conditions for the separation of phenol, o-cresol, and p-cresol from the coal tar by solvent extraction process. The aim of the present work was to study the effect of two kinds of aqueous were used as solvents: methanol and acetone solutions, the effect of temperature (298, 306, and 313K) and mixing (30, 35, and 40rpm) for the separation of phenol, o-cresol, and p-cresol from coal tar by solvent extraction. Results indicated that phenol, o-cresol, and p-cresol in coal tar were selectivity extracted into the solvent phase and these components could be separated by solvent extraction. The aqueous solution of methanol, mass ratio of solvent to feed, Eo/Ro=1, extraction temperature 306K and mixing 35 rpm were the most efficient for extraction of phenol, o-cresol, and p-cresol from coal tar. Keywords—Coal tar, Distribution coefficient, Extraction, Yield.
3 citations
TL;DR: In this article, various compositions of zinc manganese ferrospinels and their lanthana modifications were tested as catalysts for the vapor phase alkylation of phenol with methanol.
Abstract: Various compositions of zinc manganese ferrospinels and their lanthana modifications were tested as catalysts for the vapor phase alkylation of phenol with methanol. The zinc manganese ferrospinels were prepared by the controlled low temperature hydroxide co-precipitation method and their lanthana modification by the wet impregnation method. The prepared systems were characterized by various physico-chemical methods. All the ferrite samples proved to be active for the alkylation of phenol using methanol and lanthana modified systems exhibited cent percent for o-cresol. Being an acid–base catalyzed reaction, the enhancement in the phenol conversion for the phenol alkylation reaction using methanol in the prepared systems is mainly due to their increased acidity, especially in the strong regions. Under the optimized reaction conditions, all the systems showed constant activity for a long time.
2 citations
Patent•
13 Feb 2013
TL;DR: In this article, a method for preparing o-cresol and 2,6-dimethyl phenol in a mode of reducing the unit consumption of methanol is presented.
Abstract: The invention provides a method for preparing o-cresol and 2,6-dimethyl phenol in a mode of reducing the unit consumption of methanol. According to the method, a reaction mass comprises the following ingredients of: phenol, methanol and water, wherein a molar ratio of the phenol to the methanol to the water is 1:(4-2.5):(1-3); and reaction for preparing the o-cresol and the 2,6-dimethyl phenol is performed under normal pressure or pressurized pressure of 0.1 to 0.8 MPa. According to the method, appropriate reaction pressure is selected, so that the selectivity is high, and the unit consumption of the methanol is reduced; and the appropriate raw material ratio and airspeed are selected, so that high-efficiency production is realized.