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

Patent metadata

Field	Value
Publication number	US-10124302-B2
Application number	US-201615044150-A
Country	US
Kind code	B2
Filing date	Feb 16, 2016
Priority date	Jan 21, 2011
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

Sulfur contaminants, such as elemental sulfur (S8), 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 the silicone-based chemical filter in the form of 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.

2. The method as recited in claim 1 , wherein the polyhydrosiloxane is selected from the group consisting of polymethylhydrosiloxane (PMHS), polyethylhydrosiloxane, polypropylhydrosiloxane, polyphenylhydrosiloxane, polydimethylsiloxane methylhydrosiloxane copolymer, and combinations thereof.

3. The method as recited in claim 1 , wherein the cross-linked silicone membrane is a porous cross-linked silicone membrane.

4. The method as recited in claim 1 , wherein the one or more sulfur contaminants contained in the water include elemental sulfur (S 8 ).

5. The method as recited in claim 1 , wherein the water is well water.

6. The method as recited in claim 1 , wherein the step of providing the silicone-based chemical filter in the form of 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.

7. A method for removing sulfur contaminants from water using a silicone-based chemical filter, comprising the steps of:
providing the silicone-based chemical filter in the form of 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.

8. The method as recited in claim 7 , wherein the one or more sulfur contaminants contained in the water include elemental sulfur (S 8 ).

9. The method as recited in claim 7 , wherein the water is well water.

Assignees

• IBM

Inventors

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

Classifications

• B01D39/1676

  of synthetic origin · CPC title

• C02F2101/101

  Sulfur compounds · CPC title

• B01D71/70 Primary

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

• C10G2300/1055

  Diesel having a boiling range of about 230 - 330 °C · CPC title

• C10G2300/104

  Light gasoline having a boiling range of about 20 - 100 °C · CPC title