Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates

Chemistry

Keywords

Dimethyl carbonate, Organic carbamates, Phosgene-free synthesis, Solid acid catalysts, Zinc aluminophosphates

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates. / Annath, Hamza; Aloor, Vijayasankar Viswambaram; Narasimhaiah, Nagaraju.
In: Iranian Journal of Catalysis, Vol. 11, No. 1, 31.03.2021, p. 13-21.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Author

Annath, Hamza ; Aloor, Vijayasankar Viswambaram ; Narasimhaiah, Nagaraju. / Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates. In: Iranian Journal of Catalysis. 2021 ; Vol. 11, No. 1. pp. 13-21.

Bibtex

@article{47ea0b625e5043d7aed8c675ae9257f1,

title = "Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates",

abstract = "Aluminophosphate and metal incorporated aluminophosphates have been synthesized at ice-cold temperature by simple co-precipitation method in the absence of a templating agent. Surface and bulk properties of synthesized materials were studied by different characterization techniques. The materials were found to be X-ray amorphous. N2 adsorption-desorption studies exhibited the existence of microporous structure and uniform narrow slit type of pores on the materials. The catalytic activity of the synthesized material was tested in phosgene free synthesis of carbamates from corresponding amines and dimethyl carbonate (DMC) through a greener route. Metal incorporated Aluminophosphates indicated excellent catalytic activity compared to pure aluminophosphates. Zinc aluminophosphate catalyst exhibited 83% carbamate yield with 100% selectivity towards the formation of carbamate. The excellent catalytic activity of Zinc aluminophosphate with 94% amine conversion is attributed to its surface properties mainly moderate acid strength. The incorporated metal plays a vital role in the structural and textural properties of aluminophosphates. A systematic study was conducted to correlate the catalytic activity and surface properties of metal aluminophosphates. Reaction conditions were optimized to obtain a better yield through phosgene free eco-friendly routes using different amines. The catalyst was found to be recyclable for 5 cycles in the desired reaction without a reduction in conversion and selectivity.",

keywords = "Dimethyl carbonate, Organic carbamates, Phosgene-free synthesis, Solid acid catalysts, Zinc aluminophosphates",

author = "Hamza Annath and Aloor, {Vijayasankar Viswambaram} and Nagaraju Narasimhaiah",

year = "2021",

month = mar,

day = "31",

language = "English",

volume = "11",

pages = "13--21",

journal = "Iranian Journal of Catalysis",

issn = "2252-0236",

publisher = "Islamic Azad University",

number = "1",

}

RIS

TY - JOUR

T1 - Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates

AU - Annath, Hamza

AU - Aloor, Vijayasankar Viswambaram

AU - Narasimhaiah, Nagaraju

PY - 2021/3/31

Y1 - 2021/3/31

N2 - Aluminophosphate and metal incorporated aluminophosphates have been synthesized at ice-cold temperature by simple co-precipitation method in the absence of a templating agent. Surface and bulk properties of synthesized materials were studied by different characterization techniques. The materials were found to be X-ray amorphous. N2 adsorption-desorption studies exhibited the existence of microporous structure and uniform narrow slit type of pores on the materials. The catalytic activity of the synthesized material was tested in phosgene free synthesis of carbamates from corresponding amines and dimethyl carbonate (DMC) through a greener route. Metal incorporated Aluminophosphates indicated excellent catalytic activity compared to pure aluminophosphates. Zinc aluminophosphate catalyst exhibited 83% carbamate yield with 100% selectivity towards the formation of carbamate. The excellent catalytic activity of Zinc aluminophosphate with 94% amine conversion is attributed to its surface properties mainly moderate acid strength. The incorporated metal plays a vital role in the structural and textural properties of aluminophosphates. A systematic study was conducted to correlate the catalytic activity and surface properties of metal aluminophosphates. Reaction conditions were optimized to obtain a better yield through phosgene free eco-friendly routes using different amines. The catalyst was found to be recyclable for 5 cycles in the desired reaction without a reduction in conversion and selectivity.

AB - Aluminophosphate and metal incorporated aluminophosphates have been synthesized at ice-cold temperature by simple co-precipitation method in the absence of a templating agent. Surface and bulk properties of synthesized materials were studied by different characterization techniques. The materials were found to be X-ray amorphous. N2 adsorption-desorption studies exhibited the existence of microporous structure and uniform narrow slit type of pores on the materials. The catalytic activity of the synthesized material was tested in phosgene free synthesis of carbamates from corresponding amines and dimethyl carbonate (DMC) through a greener route. Metal incorporated Aluminophosphates indicated excellent catalytic activity compared to pure aluminophosphates. Zinc aluminophosphate catalyst exhibited 83% carbamate yield with 100% selectivity towards the formation of carbamate. The excellent catalytic activity of Zinc aluminophosphate with 94% amine conversion is attributed to its surface properties mainly moderate acid strength. The incorporated metal plays a vital role in the structural and textural properties of aluminophosphates. A systematic study was conducted to correlate the catalytic activity and surface properties of metal aluminophosphates. Reaction conditions were optimized to obtain a better yield through phosgene free eco-friendly routes using different amines. The catalyst was found to be recyclable for 5 cycles in the desired reaction without a reduction in conversion and selectivity.

KW - Dimethyl carbonate

KW - Organic carbamates

KW - Phosgene-free synthesis

KW - Solid acid catalysts

KW - Zinc aluminophosphates

M3 - Journal article

AN - SCOPUS:85104695069

VL - 11

SP - 13

EP - 21

JO - Iranian Journal of Catalysis

JF - Iranian Journal of Catalysis

SN - 2252-0236

IS - 1

ER -

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