Para-selective butylation of phenol over silicoaluminophosphate molecular sieve SAPO-11 catalyst

Subramanian, S.; Mitra, Arindam; Satyanarayana, C.V.V.; Chakrabarty, D. K.

doi:10.1016/s0926-860x(97)00030-6

Cited by 98 publications

(56 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A good substrate and excellent selectivity of the products are obtained. In order to promote the [3] 59.0 5.0 43.8 175 2 1:2 Sulfated zirconia [12] 57. formation of 4-TBP at higher conversions of phenol, a proper reaction temperature, lower reactant ratio and medium acidity on the sulfated titania based catalysts are recommended.…”

Section: Resultsmentioning

confidence: 99%

“…Some commonly used catalysts for alkylation of phenol are H 2 SO 4 , BF 3 , aluminum phenoxide, etc., [2] alkylation of phenol using solid acid catalysts may be a very promising way for the synthesis considering the increasing demand for eco-friendly routes in the industry. It is reported that the molecular sieve based catalysts like SAPO-11 [3], zeolite [4], AlMCM-41 [5] and FeMCM-41 [6] were proved to be potential catalysts for the butylation of phenol among the various solid catalysts. However, the reaction or tertiary butylation of phenol gives numerous products depending on the nature of the catalyst as well as on the reaction temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Para-selective tert-butylation of phenol over nano sulfated titania catalysts prepared via sol-gel route

Sunajadevi

Sugunan

2005

Catal Lett

View full text Add to dashboard Cite

Titania, sulfated titania and a series of iron loaded sulfated titania catalyst with different iron loadings (3-9%) are prepared by sol-gel method and characterized by XRD, BET surface area and pore volume measurements, EDX, TG-DTG, FT-IR and TPD of ammonia. Alkylation of phenol with tert-butanol in the vapour phase over the prepared systems has been studied at 1 atm and 160-220°C. The interesting aspect of this reaction is the high selectivity of alkylation at the para position. Lower flow rate and higher reactant molar ratios enhances the phenol conversion and selectivity to 2,4-di-tert-butylphenol while higher flow rate and lower molar ratios are helpful in producing 4-tert-butylphenol.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Para-selective tert-butylation of phenol over nano sulfated titania catalysts prepared via sol-gel route

Sunajadevi

Sugunan

2005

Catal Lett

View full text Add to dashboard Cite

show abstract

“…Among these molecular sieves, SAPO-11 molecular sieve has been proved to show high catalytic performances in the methylation of naphthalene with methanol (Liu et al, 2013;Wang et al, 2012;Wang et al, 2013;. First of all, SAPO-11 is a one-dimensional pore zeolite with pore opening of 0.39 nm × 0.64 nm Zhang et al, 2007), which is between the pore size of large-pore molecular sieves and the pore size of medium-pore molecular sieves, making it an interesting material for catalytic cracking, reforming and alkylation (Subramanian et al, 1997;Prakash et al, 1996;Han et al, 2014;Liu et al, 1991;Rabaev et al, 2015;Tian et al, 2014;. Similar to ZSM-12, SAPO-11 also possesses one dimensional and non-intersecting channels (Zhang et al, 2010), which shows excellent resistance to deactivation by carbonaceous deposition.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 2,6-Dimethylnaphthalene Over Sapo-11, Sapo-5 and Mordenite Molecular Sieves

Wang

Liu

Wei

et al. 2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-Shape-selective methylation of naphthalene over SAPO-11, SAPO-5 and mordenite molecular sieves were carried out in a fixed-bed flow reactor under atmospheric pressure. Methanol and mesitylene were used as methylation and solvent agents. The experiment results showed that SAPO-11 exhibited higher stability, higher selectivity of 2,6-dimethylnaphthalene (2,6-DMN) and higher 2,6-/2,7-DMN ratio than SAPO-5 and mordenite molecular sieves. The catalytic performances for the methylation of naphthalene were mainly related to the pore structure of the catalysts. The comparison of the spent SAPO-11 with fresh SAPO-11 suggested that structure collapse of the SAPO-11 by dealumination was occurred during the methylation of naphthalene with methanol, which may have been caused by high temperature steam from water produced in the reaction or by high temperature methanol vapor.

show abstract

“…Alkylation of cresols has earned much interest of the scientists since alkylated cresols may be used as raw materials for the production of resins, durable surface coatings, varnishes, printing inks, surface active agents, antioxidants, fungicides, petroleum additives, and multifunctional stabilizers for fuels, lubricating oils and polymeric materials [1][2][3][4][5][6] . Catalytic alkylation of isomeric cresols with different alcohols and esters have been studied by several research groups [7][8][9][10][11][12][13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Application of a Mathematical Model by Means of Experimental Design to Alkylation of <i>o</i>-Cresol with Cyclohexene

Kamruzzaman

Rana

Alam

et al. 2012

Dhaka Univ. J. Sci.

View full text Add to dashboard Cite

Alkylation of o-cresol with cyclohexene in the presence of perchloric acid as catalyst was studied statistically with a three-factored experimental design. Factorial design was employed to study the effects of single factors and the effects of their interactions on the yield of alkylation. Reaction temperature, molar ratio of o-cresol to cyclohexene and amount of perchloric acid were considered as the major variables. A mathematical model was derived to calculate the predicted yield of alkylation of o-cresol with cyclohexene in the presence of perchloric acid under certain reaction conditions and cyclohexyl o-cresol was obtained in high yield. The adequacy of the suggested model was checked up and the discrepancies between the experimental and calculated values did not exceed 1.52%. An optimum yield (89.5%) of the product was obtained under the reaction conditions of a temperature of 140º C; a 6:1 molar ratio of ocresol to cyclohexene and a 5% by weight perchloric acid of o-cresol.

show abstract

Para-selective butylation of phenol over silicoaluminophosphate molecular sieve SAPO-11 catalyst

Cited by 98 publications

References 21 publications

Para-selective tert-butylation of phenol over nano sulfated titania catalysts prepared via sol-gel route

Para-selective tert-butylation of phenol over nano sulfated titania catalysts prepared via sol-gel route

Synthesis of 2,6-Dimethylnaphthalene Over Sapo-11, Sapo-5 and Mordenite Molecular Sieves

Application of a Mathematical Model by Means of Experimental Design to Alkylation of <i>o</i>-Cresol with Cyclohexene

Contact Info

Product

Resources

About