Membrane Technology and Research, Inc

X-flow B.v.

Norit Proces Technologie Holding B.v.

Ingo Blume

Ingo Pinnau

Klaus-Viktor Peinemann

Richard W Baker

Johannes Gerard Wijmans

Lucas Johannes Cornelis Kouters

Marc Johannes Fleuren

Harry Futselaar

Annemieke Bernadette Edmond Mattheeuws

Michiel Jan Lensink

Petrus Cornelis Kamp

Hendrik Dirk Willem Roesink

Johannes G Wijmans

Jeroen Marc Wijnholds

Katja Witvers

Lute Broens

Joost Alexander Spits

Lucas Johannes Kouters

Tao He

Bypass ring for water filtration modules

The invention relates to a method for manufacturing a membrane filter, comprising the steps of:

Membrane filter with deaeration and method for the manufacture thereof

A filter module provided with a housing () having an inlet () for a liquid to be filtered and an outlet () for filtered liquid, with a first filter element (-) accommodated in the housing (), in the form of a porous mass provided with a central through-opening, to which the inlet () connects, and with a second filter element () accommodated in the housing () in the form of a number of lengths of tube-shaped filtering membrane (), which together define a cylinder shape, which cylinder shape, at at least one extremity, between the open-ended filter membranes (), is filled up with a sealing material, to which extremity the outlet () connects. The inlet () connects to the central through-opening of the first filter element (-), which is surrounded by the second filter element (), which has the form of a tubular casing obtained by winding from tube-shaped filtering membrane ().

Filter module

The invention relates to a capillary filtration membrane module, comprising a filter housing provided with an inlet, an outlet and a membrane compartment accommodating a bundle of capillary filtration membranes, the filtration membranes being cased at both ends of the membrane module in membrane holders, and the membrane compartment being provided with discharge conduits coupled to the outlet for the conveyance of the permeate. The discharge conduits comprise at least one discharge lamella and provided in the membrane compartment extending substantially in the longitudinal direction of the capillary filtration membrane.

Filtration membrane module

A method for designing and making composite membranes having a microporous support membrane coated with a permselective layer. The method involves calculating the minimum thickness of the permselective layer such that the selectivity of the composite membrane is close to the intrinsic selectivity of the perselective layer. The invention also provides high performance membranes with optimized properties.

Composite membranes for fluid separations

A separation process for recovering organic components from liquid streams. The process is a combination of pervaporation and decantation. In cases where the liquid stream contains the organic to be separated in dissolved form, the pervaporation step is used to concentrate the organic to a point above the solubility limit, so that a two-phase permeate is formed and then decanted. In cases where the liquid stream is a two-phase mixture, the decantation step is performed first, to remove the organic product phase, and the residue from the decanter is then treated by pervaporation. The condensed permeate from the pervaporation unit is sufficiently concentrated in the organic component to be fed back to the decanter. The process can be tailored to produce only two streams: an essentially pure organic product stream suitable for reuse, and a residue stream for discharge or reuse.

Process for recovering organic components from liquid streams

A method for designing and making composite membranes having a microporous support membrane coated with a permselective layer. The method involves calculating the minimum thickness of the permselective layer such that the selectivity of the composite membrane is close to the intrinsic selectivity of the permselective layer. The invention also provides high performance membranes with optimized properties.

A membrane for gas separation or pervaporation. The membrane is a composite of a microporous support membrane and an ultrathin permselective membrane, the permselective membrane being made from a polyamide-polyether block copolymer having the general form: ##STR1## where PA is a saturated aliphatic polyamide segment, PE is a polyether segment, and n is a positive integer. The membrane is particularly useful in separating polar gases from non-polar gases.

Composite membrane, method of preparation and use

A pervaporation process for separating organic contaminants from evaporator condensate streams is disclosed. The process employs a permselective membrane that is selectively permeable to an organic component of the condensate. The process involves contacting the feed side of the membrane with a liquid condensate stream, and withdrawing from the permeate side a vapor enriched in the organic component. The driving force for the process is the in vapor pressure across the membrane. This difference may be provided for instance by maintaining a vacuum on the permeate side, or by condensing the permeate. The process offers a simple, economic alternative to other separation techniques.

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Hengelo, Netherlands

Ingo Blume