Adsorbent compositions

• US 6,649,086 B2
• Filed: 02/24/2003
• Issued: 11/18/2003
• Est. Priority Date: 11/29/2001
• Status: Active Grant

• Current Assignee: Multisorb Technologies Incorporated (FGI Equity LLC)
• Original Assignee: Multisorb Technologies Incorporated (FGI Equity LLC)
• Inventors: Powers, Thomas H., Payne, David S.
• Primary Examiner(s): ANTHONY, JOSEPH DAVID
• Application Number:
  US10/373,343
• Publication Number:
  US 20030127626A1
• Time in Patent Office: 267 Days
• Field of Search: 252/194, 252/184, 252/189, 252/190, 252/191, 252/192, 252/193, 252/385, 423/210, 423/327.1, 423/331, 206/0.5, 206/0.6, 206/0.7, 206/204, 428/480, 428/35.2
• US Class Current: 252/194
• CPC Class Codes: B01D 53/28 Selection of materials for use as drying agents
• CPC Class Codes: B01J 20/046 containing halogens, e.g. halides
• CPC Class Codes: B01J 20/10 comprising silica or silicate
• CPC Class Codes: B01J 20/12 Naturally occurring clays or bleaching earth
• CPC Class Codes: B01J 20/28004 Sorbent size or size distribution, e.g. particle size
• CPC Class Codes: B01J 20/2805 Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane
• CPC Class Codes: B01J 2220/42 Materials comprising a mixture of inorganic materials materials coated or impregnated on a carrier B01J20/32
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A water vapor adsorption and water retaining composition containing particulate calcium chloride and particulate vermiculite in a flexible container having a side of spun-bonded polyethylene heat sealed to a side of extrusion coated polyethylene on polyester. The foregoing composition can also contain clay.

Claims

1. A water vapor adsorption and water retaining composition consisting essentially of particulate calcium chloride present by weight in an amount of between about 5% and 90%, and particulate vermiculite present in an amount of between about 25% and 95%, said composition being contained in a flexible container having a side of spun-bonded polyethylene and a side of extrusion coated polyethylene on polyester.

2. A composition as set forth in claim 1 wherein said calcium chloride is of a size of between about 0.6 mm and 4.7 mm and wherein said vermiculite is of a size of between about 0.05 mm and 5 mm.

3. A composition as set forth in claim 1 wherein said calcium chloride is present by weight in an amount of about 30% and said vermiculite is present in an amount of about 70%.

4. A composition as set forth in claim 1 wherein said calcium chloride is present by weight in an amount of between about 12% and 50% and wherein said vermiculite is present in an amount of between about 50% and 88%.

5. A composition as set forth in claim 4 wherein said vermiculite is of a size of between about 0.15 mm and 3 mm.

6. A composition as set forth in claim 1 wherein said calcium chloride is present by weight in an amount of between about 20% and 35% and wherein said vermiculite is present in an amount of between about 65% and 80%.

7. A composition as set forth in claim 6 wherein said vermiculite is of a size of between about 0.3 mm and 2.8 mm.

8. A water vapor adsorption and water retaining composition consisting essentially of particulate calcium chloride present by weight in an amount of between about 10% and 30%, particulate vermiculite present in an amount of between about 5% and 80%, and clay present in an amount of between about 5% and 75%, said composition being contained in a flexible container having a side of spun-bonded polyethylene and a side of extrusion coated polyethylene on polyester.

9. A composition as set forth in claim 8 wherein said calcium chloride is of a size of between about 0.6 mm and 4.7 mm and wherein said vermiculite is of a size of between about 0.05 mm and 5 mm and wherein said clay is of a size of between about 0.5 inch and 200 mesh.

10. A composition as set forth in claim 8 wherein said calcium chloride is present by weight in an amount of between about 15% and 25%, and said vermiculite is present in an amount of between about 40% and 75% and said clay is present in an amount of between about 10% and 50%.

11. A composition as set forth in claim 8 wherein said calcium chloride is present by weight in an amount of about 19%, and said vermiculite in an amount of about 62%, and said clay in an amount of about 19%.

12. A composition as set forth in claim 8 wherein said calcium chloride is present by weight in an amount of between about 15% and 20%, and said vermiculite is present in an amount of between about 60% and 70% and said clay is present in an amount of between about 15% and 20%.

13. A composition as set forth in claim 12 wherein said vermiculite is of a size of between about 0.15 mm and 3 mm, and said clay is of a size of between about 0.25 inch and 40 mesh.

14. A composition as set forth in claim 12 wherein said calcium chloride is of a size of between about 0.6 mm and 4.7 mm and wherein said vermiculite is of a size of between about 0.3 mm and 2.8 mm and wherein said clay is of a size of between about 4 mesh and 20 mesh.