The conversion of phenol and the selectivity of 2,4-DTBP were 80.4 and 60.2%, respectively. The characterization analyses of BET, TPR, XRD, XPS and TEM indicated that there was a NiCe alloy formed in Ni/CeO2, which could be important to enhance the activities of the carbon gasification efficiencies and gas yields.

Fig 2: Formation of 2-TBP confirmed by GC/MS, Fig 3: Formation of 4-TBP confirmed by GC/MS, Fig 4: Formation of 2,4-DTBP confirmed by GC/MS, Fig 5: Formation of 2,6-DTBP confirmed by GC/MS. Cumene is oxidized by atmospheric oxygen is presence of metal catalyst into Cumene Hydroperoxide. In an embodiment, the present invention provides a process for the preparation of tertiary butyl phenol comprises alkylation of phenol with tert-butyl alcohol (TBA) in an autoclave reactor by using phosphorus pentoxide catalyst at temperature in the range 80 °C to 230 °C for the period in the range of 6 to 8 hrs to afford tertiary butyl phenol.

Temperature is 423 K. The product cumene hydroperoxide is heated with dilute sulphuric acid. Investigation of both homogeneous and heterogeneous catalysts for this typical Friedel-Crafts alkylation reaction results in different selectivity and activities based mainly on the acidity of the catalysts used. The 89.17% conversion of phenol and 60.77% selectivity of p-TBP were obtained at 5 molar ratio of TBA to phenol, 2.5 hr"1 space velocity, 0.05 gm catalyst and 190°C temperature. Ni/CeO2 catalyst firstly applied for phenol gasification in SCW and performed well. less hindered p-isomer (p-TBP), especially in moderately acidic media. It is an important industrial product as a pioneer to various materials and useful compounds.

The efficiency of Ni/CeO 2 was about 20% higher than that of the commercial catalyst. U.S. patent no. About 80% carbon gasification efficiency can be achieved at 525 °C and 60 min with 5 wt% phenol, 0.098 kg/m3 water density and 0.5 g Ni/CeO2/g phenol catalyst, forming CH4 and H2 as the main gaseous products.

... Name the catalyst used in commercial method of preparation of phenol.

View Answer.

The process as claimed in claim 1, wherein selectivity of said reaction towards p- tert-butyl phenol (4-DTBP) is in the range 40 to 70 %. 5.

A combinatorial approach to the development of environmentally benign organic chemical preparations, Friedel–Crafts acylation and related reactions catalysed by heteropoly acids, Heteropolyanion-based ionic liquid-functionalized mesoporous copolymer catalyst for Friedel–Crafts benzylation of arenes with benzyl alcohol, Copper (II) tetrafluroborate-promoted Meinwald rearrangement reactions of epoxides, Method for producing high-purity diisobutene, Process catalysed by bis-trifilmide compounds, Triphase catalysis over titanium–silicate molecular sieves under solvent-free conditions: I. Article titled "Supported 12-tungstophosphoricacid: An efficient and selective solid acid catalyst for tert-butylation of phenol and cresols" by N Bhatt et al.

Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. In another preferred embodiment, the catalyst loading is in the range of 1 to 6 w/w% (based on weight of phenol).

published in Applied Catalysis A: General, 1998, 166; pp 89-95 reports the alkylation of phenol with tert-butyl alcohol over zeolite Ηβ catalyst, the suitable reaction temperature range is from 378-458 K. The reaction was carried out in the tubular down flow stainless steel reactor (i.d.4mm).


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