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1. (WO1999007459) CLEANING METHOD FOR MEMBRANES
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1999/007459 International Application No.: PCT/EP1998/004977
Publication Date: 18.02.1999 International Filing Date: 23.07.1998
Chapter 2 Demand Filed: 28.12.1998
IPC:
B01D 65/02 (2006.01) ,B01D 65/06 (2006.01) ,C11B 3/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
65
Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
02
Membrane cleaning or sterilisation
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
65
Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
02
Membrane cleaning or sterilisation
06
with special washing compositions
C CHEMISTRY; METALLURGY
11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
B
PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
3
Refining fats or fatty oils
Applicants: DEN BIEMAN, Henricus, A., C., I.[NL/NL]; NL (UsOnly)
SEGERS, Jacobus, Cornelis[NL/NL]; NL (UsOnly)
STAVRIDIS, Vangelis[GR/GR]; GR (UsOnly)
UNILEVER N.V.[NL/NL]; Weena 455 NL-3013 AL Rotterdam, NL (AL, AM, AT, AZ, BA, BE, BF, BG, BJ, BR, BY, CF, CG, CH, CI, CM, CN, CU, CZ, DE, DK, EE, ES, FI, FR, GA, GE, GM, GN, GR, GW, HR, HU, ID, IL, IS, IT, JP, KG, KP, KR, KZ, LC, LR, LT, LU, LV, MC, MD, MG, MK, ML, MR, MX, NE, NL, NO, PL, PT, RO, RU, SE, SI, SK, SL, SN, TD, TG, TJ, TM, TR, UA, US, UZ, VN, YU, ZW)
UNILEVER PLC[GB/GB]; Unilever House Blackfriars London EC4P 4BQ, GB (AU, BB, CA, CY, GB, GH, IE, KE, LK, LS, MN, MW, NZ, SD, SG, SZ, TT, UG)
Inventors: DEN BIEMAN, Henricus, A., C., I.; NL
SEGERS, Jacobus, Cornelis; NL
STAVRIDIS, Vangelis; GR
Agent: JOPPE, Hermina, L., P.; Unilever N.V. Patent Dept. P.O. Box 137 NL-3130 AC Vlaardingen, NL
Priority Data:
97202498.812.08.1997EP
Title (EN) CLEANING METHOD FOR MEMBRANES
(FR) PROCEDE DE NETTOYAGE DE MEMBRANES
Abstract:
(EN) Oils, extracted from vegetables and animal tissue contain impurities such as waxes, that can be removed by filtration. During filtration the impurities stick to the membranes, which causes a reduction in flux. The initial flux can be reached again by regularly cleaning the membranes by applying the steps of: (a) backblowing with gas, (b) backflushing with edible oil, (c) treating the membranes with alkaline material. The cleaning method is in particular suitable for cleaning microfilters having an average pore diameter of 0.5-5 $g(m)m, that are used in an oil refining process.
(FR) Des huiles extraites de végétaux et de tissus animaux contiennent des impuretés, telles que des cires, qu'on peut éliminer par filtrage. Lors du filtrage, les impuretés collent à la membrane, ce qui provoque une réduction du flux. On peut retrouver le flux initial en nettoyant régulièrement les membranes, le procédé de nettoyage consistant: (a) à effectuer un décolmatage des membranes avec un gaz (b) à les rincer avec une huile comestible (c) à traiter les membranes avec une matière alcaline. Le procédé de nettoyage est particulièrement indiqué pour le nettoyage de microfiltres possédant un diamètre poreux moyen de 0,5-5 $g(m)m et s'utilisant dans un procédé de raffinage d'huile.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, HR, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)