Patent ID: 6156202
Filing Date: 2000-12-05
Classification: B01D,C02F,C08J

Abstract:
A process for preparing conducting polymer impregnated porous substrate membrane useful as a filter for capturing viruses in water comprisingi) distilling pyrrole and N-methyl pyrrole separately;ii) mixing 90 to 99.9 vol % distilled pyrrole and 10 to 0.1 vol % distilled N-methyl pyrrole obtained in step (i) above, followed by cooling the mixture to a temperature below 4.degree. C. and up to -10.degree. C.;iii) mixing 60 to 40 vol % alkyl acetate to 40 to 60 vol % cooled pyrroles mixture obtained in step (ii) above;iv) soaking a porous substrate in the mixture obtained in step (iii) above, cooling the said impregnated substrate to a temperature below 4.degree. C. and allowing it to stand for at least 1 hr;v) treating the impregnated substrate obtained in step (iv) above with a solution of ferric chloride in an inert atmosphere at a temperature ranging between 1.degree. C. to -10.degree. C. for a period ranging from 1 to 5 hrs. to obtain a conducting polymeric membrane;vi) washing the polymeric membrane obtained in step (v) above followed by drying in oxygen free atmosphere to obtain the desired membrane.