Process for preparing detergent composition containing sodium and potassium oxides

• US 5,393,446 A
• Filed: 12/16/1993
• Issued: 02/28/1995
• Est. Priority Date: 12/16/1992
• Status: Expired due to Fees

• Current Assignee: Eco Japan Co., Ltd.
• Original Assignee: Eco Japan Co., Ltd.
• Inventors: Matsumoto, Hidezo
• Primary Examiner(s): Skane, Christine
• Assistant Examiner(s): Douyon, Lorna M.
• Application Number:
  US08/167,370
• Time in Patent Office: 439 Days
• Field of Search: 252/90, 252/89.1, 252/175, 252/176, 252/179, 252/174.25, 252/DIG. 15, 252/156, 252/160, 252/135
• US Class Current: 510/294
• CPC Class Codes: C11D 17/041 Compositions releasably affixed on a substrate or incorporated into a dispensing means
• CPC Class Codes: C11D 17/046 Insoluble free body dispenser
• CPC Class Codes: C11D 7/04 Water-soluble compounds
• CPC Class Codes: C11D 7/20 Water-insoluble oxides
• CPC Class Codes: D06F 39/024 mounted on the agitator or the rotating drum; Free body dispensers

Abstract

A detergent composition comprises a fired ceramic body, which carries as effective ingredients sodium oxide and potassium oxide thereon. Sodium metaphosphate and/or calcium oxide may also be carried as optional ingredient(s). The fired ceramic body may be made of a ceramic material formed primarily of silicon oxide and aluminum oxide. Preferably, the detergent composition may be in the form of granules and may be enclosed in a container defining apertures through a wall thereof. These apertures are dimensioned so that the granular detergent composition are prevented from being lost therethrough. A granular detergent composition can be produced, for example, by adding sodium oxide and potassium oxide to a ceramic material, adding water to the resulting dry ceramic powder, kneading and forming the resulting mixture into a green body of a predetermined shape, drying the green body, firing the thus-dried green body at 500° C. to 700° C., impregnating the resulting fired body with an aqueous solution of sodium metaphosphate, and firing the thus-impregnated body again at a temperature in a range of from 200° C. to 400° C.

Claims

1. A process for the production of a detergent composition, comprising:

adding effective detergent amounts of sodium oxide and potassium oxide to a ceramic material formed primarily of silicon oxide and aluminum oxide, whereby a dry ceramic powder is obtained;

adding water to the dry ceramic powder;

kneading and forming the resulting mixture into a predetermined shape, whereby a green body is obtained;

drying the green body;

firing the thus-dried green body at 500°

C. to 700°

C.;

impregnating the resulting fired body with an effective detergent amount of an aqueous solution of sodium metaphosphate; and

firing the thus-impregnated body again at a temperature in a range of from 200°

C. to 400°

C.

2. A process for the production of a detergent composition, comprising:

adding effective detergent amounts of sodium oxide and potassium oxide to a ceramic material formed primarily of silicon oxide and aluminum oxide, whereby a dry ceramic powder is obtained;

adding water to the dry ceramic powder;

kneading and forming the resulting mixture into green granules having a granule size in a range of from 3 mm to 10 mm;

drying the green granules;

firing the thus-dried green granules at 500°

C. to 700°

C.;

impregnating the resulting fired granules with an effective detergent amount of a 3-8% aqueous solution of sodium metaphosphate; and

firing the thus-impregnated granules at a temperature in a range of from 200°

C. to 400°

C.