Microporous membrane preparation

Hollow fibre membrane Applicants This

patent

having

Nobel NV

Akzo

describes

production

a

of a hollow module

comprising

presents

central

elements,

their

side, each having

groups

of

arranged membrane

fibres

is comprised

elements

placed

on

Applicant: University

on

arms

Membranes

as

other

stacked

patent.

layers,

direction.

of different

The

groups arms

in a sealing

of

of the

material

to

of

process

HFS

fructose

method

at least one end of the hollow-fibre

to

be separated

molasses,

Patent number: WO 9833581

The

1998

Inventors:

U.

Baurmeister,

Wollbeck,

G. Fett

K. Schneider,

R.

liquid

This

is a process

cellulosic

for producing

starting

process

effluent

cations

using

process,

material, is purified

side is used to purify

membranes, the

with

effluent

metal

impurity

selected

Workers

at

laminated

newly patented following

by synthesizing having dimethyl

unit

diethylene nonwoven

two dopes

5 min.\.

patent

describes

temperature laminated

63

of 20” C. asymmetric

a

the

oxidation

in the

Inventors:

glycol

membrane

to

the

of hydrocarbons.

One

the

in

porous

reverse

with air, promotes ions.

the dense which

The

Resulting

the

oxygen

ions

contact

in partial

with

a

oxidation

Datr:

recovery

It is

is a smooth,

efficient

dialysis

R. Abe&,

of

‘fhe

pressure about

R. B. Hall,

Zhou,

G. J.

Microporous

membrane

Applicants: Asahi

Kasei Kogyo

A process

for the preparation

in water as a

membrane

of 25” C for

is described

a

with a highly

resulting

membrane

permeation process

in this and

characterised

costs

exhibits mechanical

It is claimed excellent properties.

dissolving

an

the fluid A olefin

in reverse

kinetic of

form

energy a

l‘his energy of

and

can

oi

and/or

pressure.

another

device

capable

of capturing

of product the

of hc

01

product

or

of a device

hladcs

and

transformed

the

i\ of

in

achieved ‘1 spiral

rotational

,I into

can be recovered This

consisting

in

rotating

fluid discharge.

by mrans

crown

the

force

the mcmhranc a flow

the

processes.

flow

by the centrifugal

and the low prcssurc

It

and reduce

fluid

can be rccovercd

fol-

for the

of the product. osmosis

supply

containing

the

system

devices

energy

the axis, enables

mechanical

structure

optional

this will save energy

permeate,

the

of a microporous

homogenous

patent.

by

preparation KK

a centrifugal

with

generared

permeate

1998

SA, Spain

reveals

low-pressure

Also 24 September

F. LI. Flink

RO System

transmission.

dope which the

I.312

1998

of the kinetic

is claimed

comprised

1 hr to form the

membrane

using solvent\

membrane

WO 384

osmosis

the mod&

of approximately

at

casting

stable,

patent

production

layer to the second

is in

was lap coated to

water

.I

using temperature

to form the membrane.

resulting

Applicanl: Geayst This

ether. The dope from was cast on a polyester

for

the

into process

to the shape of the

as well as rotational

use of

Hughes

film-forming polysulfone

to

moulding

the components

Centrifugal

layers.

discloses

Patent number: WO 9841394

polyimide

diethylene

added

rotational

formed forming

electronic

the hydrocarbon.

dope is prepared

using

includes

to conform

together

a dense layer porous

two

is in contact

hydrocarbon.

ionic

invention

of oxygen layer,

is manufactured

a mixed comprising

of this

generation

and Engineering

between

through

at a temperature it was

199X

membrane

porous

of 30 pm, the second solution

the

rotationally rotational

Date; 24 September

diffuse

cloth to a thickness

Then

of

through

and

The

Research

they

which

first dope is coated with, was dipped solidifying

transport

state

Xld

mixed

Applicanr: Exxon

at very low cost. The

50 pm, The first dope solution a thickness

the

as fructose

components

Inventors: J. 11 I’uglia, 1~. I? Brochu,

layer, which

by dissolving

glycol dimethyl

the resulting

membrane.

useful

resin

partial oxidation

partial

developed

ether as a solvent. Another

dope was prepared

in a dry

especially

ot

Hydrocarbon

conductor

fluorine-containing

a repeating

are new boronic

is

a mixcure

resin components

Patent number

membrane

steps: a film-forming

exchange

thermoplastic

membrane

utiliseh

membrane.

This

membrane

membrane

in

Systems

a dialysis

technique

dimensionally

to the pulp

have

‘lhe

Date: 1 September

from

Corp.

asymmetric

dispersed

a cation

water.

Denko

described.

claimed

sandwiched

claim can be manufactured

for

for forming

ion

is homogeneous

are

A process

Inventors: B. D. Smith; J. A. Riggs

1998

Denko

solvent.

mould

C. Persson

Nitto

Dialysis membranes

and phase inversion

application Applicant: Nitto

1978

Applicant: Koch Membrane

side of the unit. The

asymmetric

11 September

Date:

Patent number: US 5800624

permeable

< ,,,,,1,< <

WO

S. Matsuda

acid compound

equally

which such

Furthermore

Laminated

hentool:

membranes.

The

liquid

separation

ether),

the membrane.

Also provided

compounds

satitfactory

excellent

>articlc

as a quaternary

in a suitable

produced

compounds,

an

the has a

properties. Patext iumber

a

then

prepared

having and

fine

side and a

US 57923 15

11 August

as

and

by

i\

II ih &imed

membrane

properties

permeation

gel

ratio heforc 01 after

structure

mechanical

cooling

created

‘I‘hih

of the soIvcnt.

homogenous

such

solution,

structure

microporous

or

rate forms a gel film

at a low stretching

monosaccharides

cations

may be recirculated

Inventors: J. Landfors,

resulting

acetate,

in a particular

a one-phase

an electric

through

e.g. as washing

Patent number

ion

such

this provides

membrane

carrier

device

the

In addition,

such as a hydrophobic

substitution

the membrane. acid

via

by dissolving

salt or a boronic

evaporation

‘The

the extraction

sources

used

separation.

stretched

and fructose

are

a percolation

the

.I hydrogenated vinyl

at a satisfactory

this

such as cellulose triacetate,

having all three components

this

the effluent.

two

on the cathode effluent

mill process,

DntP:

an anode

least

being

membrane purified

between

which

is passed at

In

membrane

cathode

a

impurity

technology.

current

has

from

an aqueous

from metal

membrane

a unit cell through

unit

pulp

where

an electrochemical

comprising

cell

Upon

crude

units

to prepare

in

the

or

having

hydrogenated

is shown.

methacrylate,

liquid-liquid

concentrated

a

portion, portion

chloride

allows

(e.g. 2-nitrophenyloctyl

with lipophilic

AB

from

In addition,

glucose

compound

ammonium Applicant: Eka Chemicals

produce

plasticizer

ether compound

of pulp mill effluent

and

glucose

are prepared

polymer

organic

methyl

having

separating

described

syrup).

from

membranes

and a carrier

Purification

to

styrcne,

the solution

sugar cane juice and beet sugar juice.

lipophilic

Datp. 6 August

for

from

allows for sucrose,

membrane.

IN, USA

this technique

fructose

membrane (high

Dame,

portion,

chain chain

solvent

are

It is claimed

chain

isoprene vinyl

disaccharides

monosaccharides

separation

of

processes from

with a block or graft copolymer

olefin

butadiene

of Notre

and

monosaccharides

shell are inserted

in

1998

Membrane separation carbohydrates

shell

open

as many

in different

and embedded

leave open

part

a longitudinal

fibres

an

I. Kenichi

fibres. The

arc also open

In the housing

hollow in

hollow

which

polymer

Date 22 September

as well as adjacent

terminating

there are groups.

the

Patent number: US 58 11196 Inventors: H. Hachisuka,

module

a housing

side of the module

upper

for

of hollow

a groove-like

the upper

method

fibre membrane

at least two groups

membrane

production

hk shell

flow

ot

product. Patent number: WO 9836823 liiv~ntor: 1’ Sanchez Date 27 August

&in/.

1998

Membrane Technology No. 102