| (19) |
 |
|
(11) |
EP 0 402 112 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.03.1991 Bulletin 1991/11 |
| (43) |
Date of publication A2: |
|
12.12.1990 Bulletin 1990/50 |
| (22) |
Date of filing: 06.06.1990 |
|
|
| (84) |
Designated Contracting States: |
|
DE ES FR GB IT NL |
| (30) |
Priority: |
09.06.1989 US 364721
|
| (71) |
Applicant: THE PROCTER & GAMBLE COMPANY |
|
Cincinnati,
Ohio 45202 (US) |
|
| (72) |
Inventors: |
|
- Mueller, Frank Joseph
Cincinnati,
Ohio 45238 (US)
- Hollihan, Lester John
Newport, KY 41071 (US)
|
| (74) |
Representative: Gibson, Tony Nicholas et al |
|
Procter & Gamble (NTC) Limited
Whitley Road
Longbenton
Newcastle upon Tyne NE12 9TS
Longbenton
Newcastle upon Tyne NE12 9TS (GB) |
|
| |
|
| (54) |
Formation of discrete, high active detergent granules using a continuous neutralization
system |
(57) A process for making discrete, high active detergent particles by: (a) reacting in
a continuous neutralization system alkyl sulfuric acid and/or alkyl benzene sulfonic
acid with an alkali metal hydroxide solution, (b) adding to the system polyethylene
glycol of molecular weight about 4,000-50,000 and/or certain ethoxylated nonionic
surfactants, and (c) forming detergent particles. The alkali metal hydroxide solution
is greater than or equal to about 62% by weight of the hydroxide, and the neutralized
product has less than or equal to about 12% by weight of water. Granular detergent
compositions containing the detergent granules are also described.