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PATENT APPLICATION PUBLICATION
INDIA
Date of filing of Application: 31/10/2001
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Application No.: 1106/DEL/2001
Publication Date:09/06/2006
(54) Title of the Invention: “ An improved process for the preparation of malononitrile”
(51) International Classification : C07C 253/20
(31) Priority Document No.
NA
:
(32) Priority Date : NA
(33) Name of priority country NA
(86) International application No. : NA
Filing Date : NA
(87) International Publication No. : NA
(61) Patent of Addition to
Application No.
: N.A.
(62) Divisional to Application No. : NIL
Filed On : N.A.
Total No. of pages : 12
(71) Name of Applicant :
Council of Scientific &Industrial
Research.
Address of the Applicant: Rafi Marg, new
Delhi – 110001.
(72) Name of the Inventor:
Ananda Kumar Bandyopadhyay
Khathija Azia,
Pravin Raybaji Likhar,’
Boyapati Manorajan Choudary.
(57) Abstract: The present invention relates to an improved process for the preparation of malononitrile from
cyanoacetamide. This invention particularly relates to an eco-friendly process for the synthesis of malononitrile from
cyanoacetamide by using POCL3 as the dehydrating agent, pyridine or an organic amine as catalyst and dispensing
the use of solid absorbent, which replaces inorganic salt, to reduce polymerization of meta – phosphoric acid by-
product.
The Patent Office Journal 09/06/2006 11098
A