Title of Invention

POLYACRYLAMIDE GRAFTED DEXTRAN POLYMERIC FLOCCULANT AND ITS PROCESS OF MANUFACTURE

Abstract Polymeric flocculants, in particular hydrolysed and unhydrolysed polyacrylamide grafted dextran. The polymeric flocculant .comprises atleast one of hydrolysed and unhydrated polyacrylamide grafted dextran having molecular weight in the range of 1.5 107 to 2.0 x 107 preferably 1.963 x107 g/mole conversion efficiency of 75.5 to 90 preferably 86.45 percentage of nitrogen in the range of 15.5 to 17 preferably 16.39 and degree of substitution in the range of 85 to 90 preferably 86.15. The polymeric flocculants of the degree of substitution to provide for the best flocculation characteristics. Importanly, the selective synthesized hydrolysed and unhydrolysed grafted polymer and dextran, would have, highest flocculation efficiency among various hydrolysed and unhydrolysed graft copolymers of other polysaccharides. The invention is further directed to a process for manufacture of the flocculants involving the high molecular weight detran polyacrylamide . The invention is found useful in water/fluid treatment involving above polymeric flocculants.
Full Text

Documents:

631-KOL-2004-(22-03-2012)-CORRESPONDENCE.pdf

631-KOL-2004-(22-03-2012)-FORM-27.pdf

631-KOL-2004-CORRESPONDENCE.pdf

631-KOL-2004-FORM 27.pdf

631-kol-2004-granted-abstract.pdf

631-kol-2004-granted-claims.pdf

631-kol-2004-granted-correspondence.pdf

631-kol-2004-granted-description (complete).pdf

631-kol-2004-granted-drawings.pdf

631-kol-2004-granted-examination report.pdf

631-kol-2004-granted-form 1.pdf

631-kol-2004-granted-form 18.pdf

631-kol-2004-granted-form 2.pdf

631-kol-2004-granted-form 3.pdf

631-kol-2004-granted-letter patent.pdf

631-kol-2004-granted-pa.pdf

631-kol-2004-granted-reply to examination report.pdf

631-kol-2004-granted-specification.pdf


Patent Number 221743
Indian Patent Application Number 631/KOL/2004
PG Journal Number 27/2008
Publication Date 04-Jul-2008
Grant Date 03-Jul-2008
Date of Filing 06-Oct-2004
Name of Patentee INDIAN INSTITUTE OF TECHNOLOGY
Applicant Address KHARAGPUR 721302
Inventors:
# Inventor's Name Inventor's Address
1 RAM PRAKASH SINGH IIT KHARAGPUR 721302
2 DIPANKRANJAN MAL IIT KHARAGPUR 721302
3 S. KRISHNAMOORTHI IIT KHARAGPUR 721302
PCT International Classification Number B01D 51/02
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA