Acid-base polymer blends

1.5 bar. An aqueous

Patent number: WO 99153304 Inventors:

L. Santoro,

B. Colin,

I? Broyer,

M. Rodrigue,

desired

S. Barral-Cadiere date: 21 October

Publication

I999

product

collected.

process

temperature

the

Applicant:

in roll covers

Scapa Group

A roll cover, which which

is removed

roll,

is provided

structure.

from

contact

with

a porous

For example

sintered

particles,

reinforcement, porous

with

by leaching

layer,

and

the

20°C

30°C

and 45°C.

to the patent,

a reduced

and efficiency

may

membrane

a non-woven support

be

or a textile

layer

may

be

layer

and

the

process

time

ddte: 21 October

1999

silicate

for purifying

solutions

Inventors:

commercial

alkali metal

has been invented. device

which

should

through

The invention

relates to an electrolysis

for producing

halogen

alkali

halogen

electrically cells. These provided

solution,

comprising

with a housing

and fitted

in a “pile” consisting

outer

contact

two planar

electrodes

These electrodes flow though partition that

feed material them.

from

wall. They

they

electro-conductively rear

wall

of the

reinforcements. provide

are arranged connected

densities

of

correspondingly boundary

which

more higher

4

at flow with

of gas in the

is withdrawn solution.

The retentate

and requiring

form a mixture.

This mixture

nanofiltration

device. molecular

in series to obtain purified

sufficient

through,

but

molecules.

few

K.-H.

Dulle,

DSM NV, The Netherlands

used to isolate from

circulated applied

a desired

a fermentation along a ceramic

which

water-soluble broth.

The

membrane

a trans-membrane

Membrane Technology No. 119

pressure

can be product

the fuel

cell in order

current.

of CO,,

optional

catalytic

of the remaining

of approximately

100 to around

but preferably

from about

Electrochemical

contaminating

I999

oxidation

to sulfur

components,

cell

on

other

gas containing

H,S

chamber

to contact

a catalytic

reacts to produce

elemental

is

electrons.

protons

to which

is

membrane

the

anode

Lehrstuhl

&

The

produced

by pre-mixing

sulfur,

and a of

the

the anode where

protons through

chamber

An oxygen-containing

to

it

with

the

polymer

membrane

in

these

amino

fuel

cells,

polymer

fuel cells (PEMFCs)

fuel

cells

electrodialysis,

Patent number: WO 99154389

or in diffusion

the

Inventors: J. Kerres, W Cui date: 28 October

or

(DMFCs),

in aqueous

the

Publication

are

acid salt

to the use of polymer-

membrane electrolysis,

primary, These

the sulfonic

and

gas is

groups.

containing

membranes methanol

of a polymer

containing

amino

It also relates

electrolytic direct

consist

acid and a polymer

groups. blend

blends and polymer-

which

or tertiary

the steps of

anode,

covers polymer

membranes

secondary

on one side

through

pass

blends Verfahrenstechnik,

an

side

comprises

passing

fiir Chemische

using

membrane,

the

The process

1999

Stuttgart

sulfonic

developed.

cell has an anode chamber chamber

polymer

Universitat

oxidation

or steam

been

and is

Germany

electrochemical

has

to a selective

portion,

G.-I? Bracker

date: 28 October

This patent

Resources,

and water

the

of CO and

is rich in H,. The

of the CO

Inventors: W. Nowak, Publication

of Natural

separates

Patent number: WO 99154948

150 to

blend

from

filter which

into a filter waste gas stream and a

oxidation

Acid-base

Applicant: Minister

an electric

then fed to the fuel cell.

is suitable.

date: 21 October

is of

is rich in H,,

a large proportion

additional

and is divided

which

compartment

is subjected

this, a molecular

chamber.

into the anode

gas, which

is fed to a membrane content

for use in a fuel

to generate

The produced

Applicant:

cathode

is suitable

the H, gas stream

which

broth

of at least

which

gas stream

most

by

gaseous

“interfering”

gas stream

to achieve

The

removing

is fed to the cathode

Publication

membrane.

a process

form of a

two devices are

and/or

pre-purified

of a solid proton-conducting

filtration covers

of

liquid

and

and CO,

of the cell. A gas stream

Inventors: J. Bass, T. Dade-Figueroa

cathode

invention

rich in 0,

Patent number: WO 99152821

electrolysis I999

converting

H, gas stream

can be to

is rich in H,,

from the raw gas, in order to form an

compartment

to the

It involves

of CO,

pre-purified

about 400 daltons,

electrolysis

portions

It also involves

impurities

and system

energy.

a raw gas which

contains

cell, by feeding

Canada

towards

M. Wollny

This

the

devices,

electrical

to pass

of H,S

J. Gegner,

producing

to a method

weight

to retain

cut-off

generating

from

AG, Germany

relates

device has a molecular

In order

600 daltons,

When

S. Slavov,

I999

to allow water molecules

Patent number: WO 99153122

Applicant:

A

may be used

a more concentrated

silicate solution.

used, the second cut-off

Two or more

Mannesmann

invention

silicate

is introduced

weight cut-off,

A process for gas-phase

Membrane

the device

This

Institut

the louvre-

and cathode

date: 21 October

from

metal

Applicant:

fuels.

higher

may be used to drive

the horizontal.

Publication

with

alkali

K.T. Chuang,

date: 28 October

“catalytically”

solutions,

can be removed.

as a purified

mode

WO 99154950

Removing carbon monoxide gas streams

which

a sustainable

by slanting

Inventors: T. Borucinski,

silicate

associated

silicates,

differential

weight

is to

l&/m2

production

of the anode

are

of metal

can operate

than

This is achieved

a

to the associated

layer, while maintaining

like orifices

and

by means

service life for the membrane pulses.

other,

The aim of the invention

an apparatus

are of

in such a way

to each

housing

can

means

400

across the device, from which a permeate

decreasing

orifices so that

by

about

recycled to the feed alkali metal silicate solution

are

and cathode

other

are parallel

material, on at least

and products

The anode each

are

and a cathode).

have louvre-like

the electrolytic

and

Also included

(an anode

pressure solution

of two half-

strips

one rear wall of the housing.

separated

several

between

metal

The

in the electrolysis

J. Donini,

Publication

for

about 400 and around

to become weight

about weight

In this way, a large portion

in alkali

tend

molecular

electrolysis

of an electro-conductive with

which

an aqueous

plate-shaped

are arranged

shells made

apparatus

gases from

connected

of impurities

a

uses a membrane

but preferably

can

and cathode.

It involves

weight cut-off of between

lie berween

An electric current

sulfur and hydrogen.

A.R. Sanger, V Stanic

1000 daltons, Germany

chamber.

from the anode

Applicant: PQ Holding A method

in

from the

while water, or steam, is removed

Patent number

and about 800 daltons.

GmbH,

moist. Sulfur is obtained

cell can also be operated

Inc, USA

of at

sufficient

form and is removed

Purifying alkali metal silicate solutions

cut-off

apparatus Uhde

or vapour

be withdrawn

with a molecular

Krupp

to keep the membrane liquid

and cathode

at a temperature

and at an elevated pressure

Inventors: G. Kwant,

I?J. De Zwarte

to contact

water or steam. During

are maintained

anode chamber

400 to about 3000 daltons. The molecular

Applicant:

chamber

from the cathode

Patent number: WO 99153136 1999

to produce

obtained.

Inventor: T Ashworth

Electrolysis

a are

chamber

where it reacts with protons

the process, both the anode chamber least 120°C

and

of filtration

the cathode

cathode,

Patent number: WO 99153015

nanofiltrarion

date: 21 October

and

According

passing the alkali metal silicate solution

a capillary

membrane.

Publication

is

50°C

through

the catalytic and electrons

broth

and

passed

to produce

layer

the

this filtration

of

higher

capacity

the and is

is rendered

or fibres, or by

The

between

Publication

a fabric

which

layer. The cover may provide

dewatering

of

fibres.

between

surface

or without

on a perforated

provided

of a

non-woven

out particles

hollow

supported

over part

this may be a layer

or a layer

breaching base

Plc, UK

may be in the form of a belt

During

at between

preferably

containing

the membrane

subsequently maintained

Improvements

solution

traverses

in

or water-free

dialysis.

1999

0