Shear localized filtration system

Water intrusion

test for filters

cegregation

of

Applicant: Milhpore

Corporation

:opolymer

blended

This patent

discloses

a method

water flow test to determine pore

size distribution

fdter.

Millipores

the ability the

of a porous

claims

changes

in

compaction

structure

or creep resulting

due

is applied

the filter.

characterization

By proper

under

test, the

volume

change

initial

associated

filter can be accurately in

time

during

composite filter

surface.

:overage

of

to

Jranched

volume

with

compaction/creep

of

and

pressurizing As

plus

the

due

between

flow components

to accurately

various

copolymer

including monomers,

The

is compatible,

the acrylate

D. G. Walton,

J. F.

Hester

filtering

R. W. Gray

Membrane with immobilized affinity ligands

containing

NV affinity

support

a high flux semipermeable

been

granted

that

includes

separator

elements

membrane

packs.

arrangement

has the advantages and

that has been surface-modified

with

feed conduit

which

may

the membrane

It is claimed

this

or enzyme.

is useful

biological

for affinity

macromolecules,

proteins,

separation

including

cells, and cell fragments,

The exclusion

limit

of the matrix

is selected

immobilized

protein

surface

for

capacity,

selected

to

through

to

apertures

ligands

of

available

exclusion

to penetrate

into and from

with

the

surfaces of the membrane densities

of the affinity

the membrane.

By this

of affinity solution

the

molecules

interface,

the recognition

or

ligands

available or

determinants

cells

other

fluid

an abnormal

to

complementary

bearing

complementary

elements

have

shear

at

membranes

by

functional

branched

compatible

matrix

hydrophilic

@

surface

segregation

component

blended

base component.

surfaces

are

created

than

the

a

permeable

with a

separation

of

purified

the

2 to

Specifically,

employed

via

process

surface

Environmental

Inc.

water having 10 MO

for producing

a resistivity

/ cm.

The

in the range of

process

comprises

to be purified

to drive the equilibrium material

of the stack

ionized

in the basic solution. introduced

W. A. Greene,

K. W

method and

of a given

membrane

passed through

this membrane

The

size. It

separation

of forces

retards

size, yet allows substances

through

Pall

the

method

to separate substances

of a second ionized

and

says

system

or concentrate larger

pressure

side

purified

shear

by passing

acidic

retentate

weakly

ionized ions

from

the second

the

in the range of 1 to greater Inventors: W. V. Collentro,

a

through

is the

to provide in the

permeate

second

from than

ionized

permeate

Patent number:

osmosis

solution

a

ions of the second

a second

can be

or smaller

reverse

membrane

material

and provide

The

to the high

water

containing

material

solution.

at least a portion

reverse osmosis

is

to drive the

ionized

a second the

second

material,

weakly

is

a first

permeate

is transferred

second

in the

the

of

and

first

solution

in an acidic

solution

is

and water

to provide

of the

equilibrium

solution

smaller

size to pass

membrane.

the

larger than

pH

to become water

of a

ionized

side of the first

module

to an acidic water

membrane

of the drag forces

passage of substances

separation

by drag

pressure

reverse osmosis

acidic

system has been developed

to become

to a

The basic water solution

to a high

retentate.

and

feed stream

first weakly

the balance

fluid

side.

basic water solution

substances

a

of the

loss of feed fluid pressure,

1998

device,

the line,

1998

the pH of the water

that the balance

the separation polymeric

the concentrate

adjusting

and lift forces affects a predetermined

from MIT have prepared

through

on

through

the pressure

feed fluid pressure

forces

Researchers

or for

on the concentrate

a water feed stream

Inventors: E. Klein, D. H. Yeager

Technology

and

providing

Pall that uses shear lift forces and permeate

size in that

of the

for controlling

passing

disclose a new RO process

adjusted

transmembrane

controller

fluid

is coupled

A shear separation

of

pressure

pressure

gauge for measuring

for measuring

fluid passing

Zenon

on opposite

Date June 16 1998

Institute

gauge

the

Applicant: Zenon

Applicant: PalI Corporation

Massachusetts

on the

RO for high purity water

to cause

Patent number: US 5766908

Applicant:

and a pressure

Inventor: D. D. Nguyen

R. G. Hayes

was reported

include:

to stop rotation

Shear separation system

of hydrophilic

a

and

the feed inlet pump

Date: 19 March

their

packs.

to separate

a

line

for measuring

near

Patent number: WO 9809720

Severing,

a pump,

flow near

Au accumulator

to maintain

third

in a

apparatus

Patent number: WO 9810856

are

for complexing.

Preparation membranes

line;

A

having

for controlling

membrane

inward

the pressure

Inventors: D. N. Salyer,

affinity

permeate

and then outwardly

promote

Date: 12 March

complete

between

to

surfaces.

of membrane

exterior to

of

ends of

elements,

inwardly

for the time required

for optimizing ligaud

and

during

the

flow

causes radially

to the feed inlet

the

on

substantially ligand

proteins

maximally

for

membrane

packing

and

membrane

linkage

interior

of

sides

used

rotating

outward

to equalize

ligand

pressure

series-

outer

each gap. The stationary

is also

reagent(s)

bonds

orientation

limit

the

pressure

this

systems.

the radial

of the stationary

fluid flow radially

restrict

of both

fouling

a concentrate

line, a second

these

that

an and

the speed of the feed inlet pump;

the permeate

gaps, to carry feed fluid into and

which

to substantially

with

claimed

the

increased

a fluid

membrane

through

controlling

stationary

parallel-connected

radially

the surfaces

permit

matrix/ligand covalent

The

surfaces,

insoluble

other

is

rotating

of

interleaved It

connects

cause

cut-off)

maximization

binding

packs

weight

or

a stack

out of each gap. The rapidly

of

from solution.

(molecular

and

fluid passing

an

also provides

Improvements

and a controller

apparatus

rapidly

packs

ligand,

arrangement

of

has

raising

to

inlet,

the

increased

using improved

a feed line.

an

filtering

feed inlet a first gauge Spintek

for filtration

stack

for

apparatus,

permeate

Inc.

membrane

an affinity

be an antibody

a

system

specialist,

a patent

membrane

such as a protein

Systems,

membrane

connected

hydrogel

filtration

for reducing by raising

to

The patent

membrane

comprising

a method membrane

and periodically

pressure.

separation

Corporation

pressure

of reducing

Centrifugal

an

pressure, permeate

methods

1998

S. A.

membrane

pressure

apparatus

Applicant: Spintek

disclose

permeate

improved

Inventors: A. M. Mayes,

1998

inventors

initial

permeate

Shear localized

Applicant: Akzo Nobel

of a separation

initial

the pore size of the filter being tested

Inventors: A. J. DiLeo,

fouling permeate

polymer

Camp provides

Patent number: WO 9808595

Date: 25 March

sites

This invention

side chain,

side chain.

copolymer with

Applicant: Union

at least one

matrix.

Patent number: EP 0831318

matrix

glycol

M. E Hurwitz,

J. Cole, M. Reyad

Method for reducing Fouling

two or more

a short hydrophilic

hydrophilic

Date: 5 March

or a filter defect.

The

The

or acrylate

mind well-entangled,

to

to distinguish

Jeibel,

can be defined

my a random

branched

can be evaluated

species surface

size.

1998

inventors: J. D. Brantley,

moiety.

methacrylate

features

Date: 12 March

mech-

a high

copolymer

the

liquid intrusion) determine

achieves

separation

Patent number: WO 9809717

molecular

of hydrophilic

hydrophilic

such as a polyethylene

a result,

flow

This the

:he predetermined

It was

a thermodynamic

the

(i.e. the flow due to

hydrophilic matrix.

use of branched

hydrophilic

3f which

at all points

cycle.

changes

filter

of the filter

determined

a test

flowrate

:o the

are

to the surfaces

system

the provides

account

from compressive

forces when pressure

branched

into a polymer

mism for the segregation

membrane

and take into

filter

that

nchitecture

and/or

the improvements

to determine

yeported

for an improved

the integrity

the

weakly having

than

acidic

depleted ionized

a resistivity

10 MR I cm.

US 5766479 A. W. Newton

Date: 16 June 1998

Membrane Technology No. 99