Articles invited to Chem Y (Journal for Young Researchers in Chemistry, ISSN 2394-1324)

Dear Sir,

Chem Y (Journal for Young Researchers in Chemistry, ISSN 2394-1324) being published by the Research and Post Graduate Department of Chemistry of MES Keveeyam College Valanchery is intended to promote publication of research articles of emerging researchers in chemistry. We invite contributions from Faculty members and Research Scholars of various universities and colleges to the second issue of ChemY which is to released in September 2015. The articles may be submitted via email to pgdchem@gmail.com on or before 30-7-2015.

 

Author Guidelines:

Manuscripts should be prepared and submitted as a single document including tables, figures, references, etc. The manuscripts should be typewritten in Time New Roman (12 Font). For more details about the manuscript pattern please see a template attached below.

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Head, Department of Chemistry

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Article Template

 

Novel Method for the Preparation of  Materials (Heading 16 bold )

Rosilda Selvin1,  Selva Roselin1 and Prajitha Kumari2* (Authors 12 bold)

1Lunghwa University of Science and technology, Taiwan

2Department of Chemistry, PSMO College, Tirurangadi, Kerala, India (Author Affiliation 12 normal)

*prajithakpn@gmail.com

 

ABSTRACT

 

Tert-butylated investigated in terms of conversion and selectivity for the desired product under mild conditions.

(Abstract maximum 300 words)

Keywords: alkylation; dodecatungstophosphoric acid; nanoparticle; tert-Butylation

 

1.      INTRODUCTION

Tert-butylation of phenol is an industrially important reaction and alkylated phenols are widely used for a variety of applications such as antioxidants, herbicides, insecticides, and polymers [1]. They are conventionally prepared by reacting phenol with pure isobutylene gas or C4 fraction of naphtha using a liquid acid catalyst, which gives wide product distribution. In general, tert-butylation of phenols is carried out in a homogeneous medium using sulphuric acid, phosphoric acid, aluminium chloride–boric acid or boron trifluoride as a catalyst [2]. The use of conventional Friedel–Crafts catalysts gives rise to many problems concerning handling, safety, corrosion, and waste disposal. Therefore, considerable efforts have been made for the development of suitable heterogeneous solid acid catalysts [3]. The current processes use highly polluting and hazardous catalysts. Although many commercial ion exchange resins exhibits high activity for the tert-butylation of phenol and substituted phenols with isobutylene, their lower thermal stability limit their industrial application. Various solid acid catalysts have been reported in the literature for tert-butylation of phenols [4-8]. Most of the solid acid catalysts reported are active and the most important problem is the selectivity for the desired product [9].

2. EXPERIMENTAL

2.1. Preparation of DTP included silica nanoparticle

The modified version of DTP included  silica nanoparticle was prepared by sol–gel technique followed by steaming. In a typical procedure, 30wt % DTP/SiO2 was prepared by dissolving

2.2. Characterization

Powder X-ray diffraction patterns were recorded using a Rigaku 2000 diffractometer equipped with a Cu-Kα radiation (λ = 1.5418 Å) from 2θ = 2.5 to 60° at a scan rate of 2°/min

3.      RESULTS AND DISCUSSION

3.1.Surface area measurements

The surface area of the unsteamed 30 wt % DTP/SiO2 is only 27 m2/g whereas after steaming, it increases drastically up to 10 times, i.e. 30 wt % DTP/SiO2 is 277 m2/g. During the

3.2.TEM analysis

            TEM micrographs of 30 wt % DTP/SiO2 sample prepared before and after steaming are reported in Fig. 2.

 
 
 

 

 

 

 

 


Figure 2.  TEM image of 30 wt % DTP/SiO2: (a) before steaming (b) after steaming

 

The effect of catalyst quantity was studied over a range of 0.05–0.2 g for alkylation of phenol with tert-butyl alcohol at 80 °C (Table. 1).

 

Table 1. Effect of catalyst amount on the conversion of tert-butyl alcohol

Catalyst Weight (g)

Conversion of tert-butyl alcohol (%)

Selectivity (%)

4-TBP

2-TBP

2,4-DTBP

0.05

67

95

4.5

0.5

0.10

84.0

95.8

3.7

0.5

0.15

95.6

98.5

0.1

0.4

0.20

97.8

98

1.6

0.4

 

 

 

 

 

 

 

 

4.      CONCLUSIONS

The present work deals with the alkylation of phenol by tert-butyl alcohol using steamed DTP/silica nanoparticle catalysts as a potential replacement for conventional Lewis acid or

 

Acknowledgement

Financial support from the Ministry of Higher Education via the Taiwan-India collaboration

 

REFERENCES

1.      Voges H.W, in: B. Elvers, S. Hawkins, and G. Schulz (Eds.), Ullmann’s Encyclopedia of Industrial Chemistry, Weinheim, Germany, vol. A19, VHC, 328-328 (1991).

2.      Patinuin S.H and Friedman B.S., in: G.A. Olah (Ed.), Alkylation of Aromatics with Alkenes and Alkanes in Friedel–Crafts and Related Reactions, vol. 3, Interscience, New York, 75-81 (1964).

3.      Mathew T., Rao B.S and Gopinath C.S., Tertiary butylation of phenol on Cu1−xCoxFe2O4: catalysis and structure–activity correlatio , J. Catal. 222, 107 -116(2004).

4.      Kamalakar G., Komura K and Sugi Y., tert-Butylation of Phenol over Ordered Solid Acid Catalysts in Supercritical Carbon Dioxide: Efficient Synthesis of 2,4-Di-tert-butylphenol and 2,4,6-Tri-tert-butylphenol, Ind. Eng. Chem. Res, 45, 6118–6126(2006).

 

Research Centre

Department elevated as a “Research Centre” by University of Calicut

in November 2014

DST-FIST Fund

Department of Science & Technology(DST)  sanctioned an amount of

 

80 lakhs under FIST Programme  2014 (Fund for Improvement of S&T

Infrastructure in Universities and Higher Educational Institutions )

 

 ChemY- Journal Release

The first issue  of  ChemY  (Journal for Young Researchers in Chemistry) released in September 2014

Alumni Meeting-BONDS 2014

A meeting of Chemistry  Alumni Association  'BONDS' was held on 29th November 2014 at 2.30pm in the College Campus.

Yuva Raksha Samooha Suraksha
Yuva Raksha Samooha Suraksha, the extension activity of chemistry department conducted an anti drug campaign in 20 nearby higher secondary schools on 24th September 2014. 5th semester Degree students of the department are divided into five groups and they distributed pamphlets and made the students aware about drug abuse.
Chembuds 2014 on June 24

Chembuds being organised by the Department of Chemistry to promote innovative thoughts and practices in the subject by higher secondary students. This year the the academic sessions in the work shop will be handled by Prof. Sreedharan Nair and Dr. Mohammed Shafi.