Process for textile bleaching with dibasic magnesium hypochlorite

• US 4,236,891 A
• Filed: 02/05/1979
• Issued: 12/02/1980
• Est. Priority Date: 02/05/1979
• Status: Expired due to Term

• Current Assignee: OLIN Corporation
• Original Assignee: OLIN Corporation
• Inventors: Scardera, Michael, Schifilliti, Garrett B.
• Primary Examiner(s): Kight, III, John
• Application Number:
  US06/009,316
• Time in Patent Office: 666 Days
• Field of Search: 8/108 A, 252/95, 252/100, 252/186
• US Class Current: 8/108.1
• CPC Class Codes: C11D 3/3953 Inorganic bleaching agents C11D3/3951 takes precedence
• CPC Class Codes: D06L 4/23 using hypohalogenites

Abstract

Textile fabrics are bleached in a process which comprises contacting the textiles with an aqueous solution of dibasic magnesium hypoclorite. The bleaching solution is maintained at a pH of from about 3 to about 8 by the addition of an acid or acid salt.

Claims

1. A process for bleaching textiles which comprises contacting said textiles with an aqueous solution of dibasic magnesium hypochlorite, the pH of said aqueous solution being maintained at from about 3.5 to about 7.5 by the addition of an acid compound.

2. The process of claim 1 in which said acid compound is an inorganic acid selected from the group consisting of phosphoric acid, hydrochloric acid, sulfuric acid, nitric acid, and boric acid.

3. The process of claim 1 in which said acid compound is an organic acid selected from the group consisting of formic acid, acetic acid, citric acid, tartaric acid, and nitrilotriacetic acid.

4. The process of claim 1 in which said acid compound is a salt selected from the group consisting of alkali metal bisulfates and alkali metal acid phosphates.

5. The process of claim 2 in which said inorganic acid is phosphoric acid.

6. The process of claim 1 in which the temperature of said aqueous solution is maintained at from about 10°

to about 100°

C.

7. The process of claim 6 in which said textiles are cotton textiles.