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Synthesis, characterization and catalytic activity of cobalt phthalocyanine tetrasulphonamide in sweetening of LPG

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Abstract.
Cobalt phthalocyanine tetrasulphonamide was synthesized by reacting cobalt phthalocyanine with
chlorosulphonic acid at 130–135 oC followed by addition of thionyl chloride to convert free sulphonic
acid to sulphonyl chloride and subsequently amidation with ammonia. It was isolated by acidifying the
reaction mixture with hydrochloric acid followed by filtration. It was characterized by elemental IR and
FAB mass spectral analysis. The activity of cobalt phthalocyanine tetrasulphonamide catalyst for
extractive sweetening of LPG was evaluated by studying mercaptide oxidation using ethyl mercaptan as
model sulfur compound in glass column. The stability of the catalyst was evaluated by studying liquid–
liquid sweetening in a batch reactor using hexane thiol as a model compound and petroleum ether as an
inert solvent. The performance of this catalyst with respect to activity and stability was found better than
the commercial catalyst being used currently in the refineries. Commercial trial run of this catalyst has
been successfully conducted for 4 months in FCC LPG Merox unit of Bharat Petroleum Corporation
Limited (BPCL), Mumbai and the performance was found better than commercial catalyst. Another trial
run of the catalyst has been conducted in one of the LPG Merox units at Reliance Industries Limited (RIL),
Jamnagar for 8 months and the performance has been found to be excellent with less catalyst
consumption than commercial catalyst.

Keywords:
Cobalt phthalocyanine
Cobalt phthalocyanine tetrasulphonamide
LPG
Sweetening
Mercaptan
Oxidation
IIP

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Informasi Detail

Judul Seri

Catalysis Today

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Catalysis Today 141 (2009) 152–156

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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