Tablet granulation

• US 4,673,527 A
• Filed: 05/20/1985
• Issued: 06/16/1987
• Est. Priority Date: 05/20/1985
• Status: Expired due to Fees

• Current Assignee: Autotrol Corp. (GE Aerospace)
• Original Assignee: Autotrol Corp. (GE Aerospace)
• Inventors: Whitaker, Thomas S., Cassedy, Linn W., Goudy, Paul R. Jr.
• Primary Examiner(s): Wax, Robert A.
• Application Number:
  US06/735,845
• Time in Patent Office: 757 Days
• Field of Search: 252/134, 252/174, 252/175, 252/176, 252/181, 424/14
• US Class Current: 252/181
• CPC Class Codes: C02F 1/5227 Processes for facilitating the dissolution of solid flocculants in water
• CPC Class Codes: C02F 1/5236 using inorganic agents
• CPC Class Codes: C02F 1/54 using organic material
• CPC Class Codes: C02F 1/688 Devices in which the water progressively dissolves a solid compound

Abstract

An improved granulation and tablet product for water treatment. One or more water treating agents are dispersed and entrapped in a water soluble polymeric material which is more water soluble than the water treating agent. The water treating agent is entrapped in a polymeric matrix by first treating the polymeric material with an alcohol, blending with the water treating agent and subsequently adding water to the admixed polymeric material and water treating agent.

Claims

1. A process for formulating a granulation composition comprising:

treating a polymeric material with an alcohol which is substantially free of water to blanket said polymeric material from moisture and air;

admixing said alcohol treated polymeric material with a dry ingredient different from said polymeric material, said dry ingredient being less water soluble than said polymeric material; and

combining said admixed product with water to bond the polymeric molecules of said polymeric material together and entrap said ingredient in a polymeric matrix.

2. The process of claim 1 wherein additional dry ingredients are added to said dry ingredient in a sequential manner.

3. The process of claim 2 further including the step of forming the granulation into a tablet.

4. A granulation or tablet product wherein a dry ingredient is entrapped in a polymeric material, the dry ingredient being different from the polymeric material and being less water soluble, said product produced by the steps comprising:

treating said polymeric material with an alcohol which is substantially free of water to blanket said polymeric material from moisture and air;

admixing said alcohol treated polymeric material with said dry ingredient; and

combining said admixed product with water to bond the polymeric molecules of said polymeric material together and entrap said ingredient in a polymeric matrix;

said dry ingredient being entrapped by said polymeric material in a homogenous manner with the polymer chains and the charge sites of said polymers being separated by said alcohol and water treatment steps prior to said entrapment.

5. The product of claim 4 wherein said alcohol contains from one to five carbon atoms.

6. The product of claim 4 wherein said polymeric material is an acrylic polymer.

7. The product of claim 4 wherein said polymeric material is a vinyl resin.

8. The product of claim 4 wherein said polymeric material is an oxide of polyethylene, polypropylene or polyoxymethylene.

9. The product of claim 4 wherein said dry ingredient is a water treating agent.

10. The product of claim 9 wherein said water treating agent includes a phosphonic acid compound.

11. The water treating composition of claim 9 wherein said water treating agent includes a molybdate compound.

12. The product of claim 9 wherein said water treating agent includes a benzotriazole compound.