| (19) |
 |
|
(11) |
EP 0 438 320 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
19.02.1992 Bulletin 1992/08 |
| (43) |
Date of publication A2: |
|
24.07.1991 Bulletin 1991/30 |
| (22) |
Date of filing: 18.01.1991 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
19.01.1990 GB 9001285
|
| (71) |
Applicants: |
|
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
- UNILEVER N.V.
NL-3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
|
|
| (72) |
Inventors: |
|
- Evans, David George
Oxton,
Birkenhead L43 2NS (GB)
- McLeod, Gordon George
Vicars Cross,
Chester CH3 5LH (GB)
- Peter, Donald
Thornton Hough,
Wirral L63 1JS (GB)
- Yuregir, Korkut Remzi
Wirral,
Merseyside L60 1UU (GB)
|
| (74) |
Representative: Ford, Michael Frederick et al |
|
MEWBURN ELLIS
York House
23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB) |
|
| |
|
| (54) |
Detergent compositions and process for preparing them |
(57) A batch process for the preparation of detergent powder of high bulk density comprises
neutralising a detergent acid (anionic surfactant precursor), eg linear alkylbenzene
sulphonic acid, with a particulate solid water-soluble alkaline inorganic material,
for example, sodium carbonate (optionally plus other alkaline materials and/or detergency
builders, for example, alkali metal aluminosilicate), in a high-speed mixer/granulator,
eg Fukae mixer, and granulating the product in the mixer. The reaction mixture remains
particulate throughout the process, without the need to keep the temperature during
the neutralisation step to 55°C or below, and a high-quality high-bulk-density particulate
product is obtained.