Isolation of proteinaceous materials

• US 4,163,010 A
• Filed: 04/27/1978
• Issued: 07/31/1979
• Est. Priority Date: 04/27/1978
• Status: Expired due to Term

• Current Assignee: Varied Investments Incorporated
• Original Assignee: Grain Processing Corporation (The Kent Corp.)
• Inventors: Garbutt, John T.
• Primary Examiner(s): Yoncoskie, Robert A.
• Application Number:
  US05/900,499
• Time in Patent Office: 460 Days
• Field of Search: 426/656, 426/490, 260/112 R, 260/112 G
• US Class Current: 530/376
• CPC Class Codes: A23J 1/16 from waste water of starch-manufacturing plant or like wastes

Abstract

Protein is recovered from corn steep liquor by a process which involves ultrafiltration and precipitation with an alkaline precipitating agent. The recovered protein is acid soluble making it useful in acidic foods.

Claims

1. A process which comprises subjecting corn steep liquor to ultrafiltration to obtain a retentate containing protein, treating the retentate with an alkaline precipitating agent to precipitate non-proteinaceous material in said retentate, and separating the precipitate from said protein-containing retentate.

2. The process of claim 1 wherein after separation of the precipitate the protein-containing retentate is dried.

3. The process of claim 1 wherein the corn steep liquor is filtered prior to being subjected to ultrafiltration.

4. The process of claim 1 wherein the corn steep liquor which is subjected to ultrafiltration has a pH value of not substantially above 5.

5. The process of claim 1 wherein prior to separation of the precipitate, the protein-containing retentate is heated to a temperature above about 75°

C.

6. The process of claim 1 wherein the alkaline precipitating agent is calcium hydroxide.