| Patents for B01D 33 - Filters with filtering elements which move during the filtering operation (10,149) |
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| 03/06/1991 | EP0414879A1 Filter for continuous filtration. |
| 03/06/1991 | CN1049629A Dehydration press |
| 03/01/1991 | CA2024342A1 Sealing member for a filter press |
| 02/27/1991 | EP0414621A1 Dehydrating press |
| 02/27/1991 | EP0414341A1 Screening device |
| 02/26/1991 | US4995988 Method and apparatus for thickening a slurry using a compression plate |
| 02/26/1991 | US4995972 Method and apparatus for removing liquid from permeable material |
| 02/26/1991 | CA2023048A1 Dehydration press |
| 02/20/1991 | EP0413178A2 Device for mechanical purification of biologically treated waste water |
| 02/19/1991 | US4994183 Rotating filter with outer filtrate conduits |
| 02/17/1991 | CA2023302A1 Apparatus for mechanical purification of liquids |
| 02/12/1991 | US4992167 Filtering apparatus |
| 02/12/1991 | CA1280076C Method and apparatus for thickening a suspension |
| 02/06/1991 | EP0411939A1 Liquid waste separator |
| 02/06/1991 | CN1011484B Equipment for detecting dehydrating slurry flow on pressure net band filter |
| 02/05/1991 | US4990261 Method for monitoring and/or controlling liquid-solid separation processes |
| 02/05/1991 | US4990253 Fluid sample filtration device |
| 01/30/1991 | CN2070295U Water magnetizing filter |
| 01/30/1991 | CN1048810A Gravity filter bed with moving band for slag and water separation |
| 01/22/1991 | US4986911 Dewatering process and apparatus |
| 01/22/1991 | US4986910 Apparatus for dehydrating sludge |
| 01/22/1991 | US4986422 Method of screening solid materials and apparatus for performing same |
| 01/16/1991 | CN1048539A Process and catalyst for production of ethylene and acetic acid |
| 01/15/1991 | US4985152 Process for separating solvents used in the purification of products |
| 01/09/1991 | EP0407091A1 Process and catalyst for the production of ethylene and acetic acid |
| 01/09/1991 | EP0406424A1 Process for recovering crystals from slurry |
| 01/07/1991 | WO1991000768A1 Method and apparatus for treating fiber suspension |
| 01/07/1991 | WO1991000767A1 Filter cylinder |
| 01/05/1991 | CA2019509A1 Process and catalyst for the production of ethylene and acetic acid |
| 01/04/1991 | WO1991000249A1 Method of concentrating and dehydrating slurried sludge |
| 01/03/1991 | DE3920094A1 Transversely severing circulated filter band end by blade - angularly held in slot between spring-loaded rollers holding down band end |
| 01/02/1991 | EP0405562A2 Method for cleaning the filter plates of a suction drier |
| 01/02/1991 | EP0405199A1 Process and device for the pre-thickening of sludge |
| 01/02/1991 | CA1278531C Screening device |
| 12/27/1990 | WO1990015655A1 Filter for continuous filtration |
| 12/20/1990 | DE3919981A1 Centrifugal sieve separators - alternately accumulate and discharge solids from cylinders also rotating about own axis |
| 12/19/1990 | EP0344152B1 Process and installation for dewatering waste water sludge |
| 12/13/1990 | DE3918527A1 Device for disposal of sewage sludge - comprises rotating drum dryer and filter band press used instead of centrifuge to improve throughput of sludge drying system |
| 12/11/1990 | US4976853 Control valve means for use in a filtration apparatus for treating waste product |
| 12/11/1990 | CA1277532C Apparatus for washing cellulose |
| 12/10/1990 | WO1990014872A1 Method and apparatus for clarifying liquids |
| 12/10/1990 | CA2034006A1 Method and apparatus for clarifying liquids |
| 12/05/1990 | EP0400787A2 Adjustable valve for rotary filters |
| 12/04/1990 | US4975189 Cleaning sprays for disc filters |
| 12/04/1990 | US4975188 Centrifugal filter apparatus |
| 12/04/1990 | US4975182 Waterflow differential electrical charging process for ores |
| 12/04/1990 | US4975150 Method for preventing plugging of suction roll of paper machine and anti-plugging agent therefor |
| 11/28/1990 | EP0225906B1 Improvements in filters |
| 11/27/1990 | US4973407 Filter for filtering liquids |
| 11/26/1990 | WO1990014693A2 Process for the production of battery paste |
| 11/26/1990 | CA2062724A1 Process for the production of battery paste |
| 11/22/1990 | EP0398437A1 Device, suitable for the continuous recovery of a product in suspension, as well as a process for the continuous recovery of a product in suspension with the aid of the said device |
| 11/22/1990 | EP0398173A2 Filter apparatus with an apparatus for fixing filter elements |
| 11/21/1990 | CN1047040A Drum vacuum filter |
| 11/20/1990 | US4971694 Double diffuser with backflush pistons |
| 11/20/1990 | US4971691 Quick change sludge processor |
| 11/15/1990 | WO1990013348A1 Filter cell |
| 11/15/1990 | WO1990013347A1 Separation device |
| 11/14/1990 | CN2065505U Unloading pressure adjustable continuous filter press separator for truncated disk |
| 11/14/1990 | CN1010376B Process for formation and drying of filtor cake |
| 11/13/1990 | US4970004 Vibrating sieve filter |
| 11/13/1990 | CA1276080C Bs&w measurement apparatus and method |
| 11/08/1990 | DE4007492A1 Pressure filter |
| 11/07/1990 | EP0396079A2 Apparatus for dewatering sludges and similar substances |
| 11/06/1990 | US4968600 Apparatus for separating cell suspension |
| 11/01/1990 | WO1990012919A1 Dewatering device |
| 10/30/1990 | CA1275593C Arrangement for liquid treatment of pulp |
| 10/23/1990 | US4964988 Horizontal belt filter guide |
| 10/23/1990 | CA1275509C Method and apparatus for drying sludge |
| 10/17/1990 | EP0392340A2 Press filter |
| 10/16/1990 | US4963270 Decker with partitions for filtrate fractions |
| 10/16/1990 | US4963259 Sludge dewatering filter press |
| 10/16/1990 | US4962698 Apparatus for refining oils or fats |
| 10/16/1990 | US4962592 Method and device for removing liquid from a mixture of solids and liquids |
| 10/16/1990 | CA1275262C Filters |
| 10/16/1990 | CA1275261C Process and device for filtering out particles suspended in a liquid |
| 10/14/1990 | WO1990011833A1 Continuous filter centrifuge |
| 10/14/1990 | CA2051109A1 Continuous filter centrifuge |
| 10/11/1990 | DE3911444A1 Fine filter for purification of liquids |
| 10/11/1990 | DE3910930A1 Vacuum belt filter unit |
| 10/10/1990 | EP0391243A2 Rotary disk filter consisting of individual segments |
| 10/10/1990 | EP0391091A1 Vacuum belt filtration apparatus |
| 10/10/1990 | CN2063436U Device for recovering fibre from waste water |
| 10/09/1990 | US4962044 Using external air pressure to supply measured samples of blood serum; simplification |
| 10/09/1990 | US4961862 Amendment addition system and method for twin belt press filter |
| 10/09/1990 | US4961326 Material processing system |
| 10/08/1990 | WO1990011809A1 A process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material |
| 10/03/1990 | EP0389816A2 Separator, particularly for sewage works |
| 09/26/1990 | EP0388709A2 Filtering machine for fibrous substances |
| 09/26/1990 | CN1009709B Apparatus for separating cell suspension |
| 09/25/1990 | CA1274486A1 Disk screen disk spacer and shaft assemblies and a method of making same |
| 09/20/1990 | WO1990010490A1 Filter for continuous filtration |
| 09/20/1990 | WO1990010488A1 Device for filtering and evacuating various kinds of small particles, rubbish and refuse |
| 09/20/1990 | DE3908216A1 Apparatus for cleaning sewers |
| 09/18/1990 | US4957758 Method for refining oils or fats |
| 09/18/1990 | US4957630 Drum filter with divergent hole perforated filter media |
| 09/18/1990 | CA1274187A1 Thickener |
| 09/14/1990 | WO1990010489A1 Filter for continuous filtration |
| 09/14/1990 | CA2027566A1 Filter for continuous filtration |
| 09/11/1990 | US4956102 Method for operating rotating cylindrical filters and a rotatable cylindrical filter |