Removing sulfur contaminants from water using a silicone-based chemical filter

Patent metadata

Field	Value
Publication number	US-2016159666-A1
Application number	US-201615044150-A
Country	US
Kind code	A1
Filing date	Feb 16, 2016
Priority date	Jan 21, 2011
Publication date	Jun 9, 2016
Grant date	—

Abstract

Sulfur contaminants, such as elemental sulfur (S 8 ), hydrogen sulfide and other sulfur components in water are removed using a silicone-based chemical filter. In one embodiment, a silicone-based chemical filter includes a membrane having a cross-linked silicone that is a reaction product of an olefin and a polyhydrosiloxane.

First claim

What is claimed is:

1 . A method for removing sulfur contaminants from water using a silicone-based chemical filter, comprising the steps of:
providing a cross-linked silicone membrane; passing water through the cross-linked silicone membrane.

2 . A method for removing sulfur contaminants from water using a silicone-based chemical filter, comprising the steps of:
providing a cross-linked silicone membrane, wherein the cross-linked silicone membrane includes a reaction product of an olefin and a polyhydrosiloxane, and wherein the polyhydrosiloxane is cross-linked via a platinum catalyzed hydrosilation with the olefin; passing water containing one or more sulfur contaminants through or over the cross-linked silicone membrane, wherein the one or more sulfur contaminants contained in the water are absorbed by the cross-linked silicone membrane as the water passes through or over the cross-linked silicone membrane.

3 . The method as recited in claim 2 , wherein the polyhydrosiloxane is selected from the group consisting of polymethylhydrosiloxane (PMHS), polyethylhydrosiloxane, polypropylhydrosiloxane, polyphenylhydrosiloxane, polydimethylsiloxane methylhydrosiloxane copolymer, and combinations thereof.

4 . The method as recited in claim 2 , wherein the cross-linked silicone membrane is a porous cross-linked silicone membrane.

5 . The method as recited in claim 2 , wherein the one or more sulfur contaminants contained in the water include elemental sulfur (S 8 ).

6 . The method as recited in claim 2 , wherein the water is well water.

7 . The method as recited in claim 2 , wherein the step of providing a cross-linked silicone membrane includes providing a packed column filled with Raschig rings, wherein the cross-linked silicone membrane is coated on the interior and/or exterior of each of the Raschig rings, and wherein the step of passing water containing one or more sulfur contaminants through or over the cross-linked silicone membrane includes passing the water through the packed column.

8 . A method for removing sulfur contaminants from water using a silicone-based chemical filter, comprising the steps of:
providing a porous cross-linked silicone membrane, wherein the porous cross-linked silicone membrane includes a reaction product of an olefin and a polyhydrosiloxane, wherein the polyhydrosiloxane is cross-linked via a hydrosilation with the olefin; passing water containing one or more sulfur contaminants through the porous cross-linked silicone membrane, wherein the one or more sulfur contaminants contained in the water are absorbed by the porous cross-linked silicone membrane.

9 . The method as recited in claim 8 , wherein the one or more sulfur contaminants contained in the water include elemental sulfur (S 8 ).

10 . The method as recited in claim 8 , wherein the water is well water.

Assignees

• IBM

Inventors

• Boday Dylan J
• Kuczynski Joseph
• Meyer Iii Robert E
• Tofil Timothy J

Classifications

• B01D71/70

  Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only · CPC title

• C02F1/44 Primary

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title

• C02F2101/101

  Sulfur compounds · CPC title

• B01D71/701 Primary

  Polydimethylsiloxane · CPC title

• B01D53/228

  characterised by specific membranes · CPC title