VOC removal by condensation

N3

on ‘flatish surfaces’. Additionally the

use of molecular

methods was emphasised all look forward

the interplay between

modelling

and experimental

in many presentations.

toluene

and methonal.

fed to a condenser,

We

to the next meeting.

Emissions

from the plant are

which is held at -160°C. The con-

densed VOCs can be reused. Kryoclean nitrogen

as coolant

achieved

by mixing

Graham J. Hutchings

fraction

Cardiff

for use in other

and the required

use gaseous temperature

liquid and gaseous

of the vapourised

nitrogen

processes

is

nitrogen.

A

is siphoned

in the plant

off

and this

allows fresh liquid nitrogen to be added to the coolant Dioxin removed on a TiOp V205 honeycomb

circuit. [Source: Chemistry

Greater than 99% of dioxins in incinerator can be destroyed

by a new titanium-vanadium

from Nippon Shokubai

Co. New Japanese

catalyst

dioxin stan-

dards will go into effect in 1998 which specify levels of 0.2 ng/Nm3 for new furnaces Nm3 for existing honeycomb

ones. The catalyst

and comprises

and is installed

Dioxins are decomposed at levels above

99%

TiOp and V205

to CO*, HCI and HP0 at ambi-

semicommercial

200 and 350°C. Destruction

were reported

facility

in a IO-m-t/day

with a gas stream that con-

tained 5-10 ng of dioxin TEQ/Nm3. [Source: Chemical

Engineering

catalyst

and 0.5 ngl

in the exhaust duct of the incinerator.

ent pressure and between

Ammoxidation of ethane to acetonitrile over Co-Beta

dioxin

is in the form of a

mainly

Juejin Li and John N. Armor report Commun. of

p. 2013, 1997, significantly

acetonitrile

observed

September

19971

will buy DuPonts worldwide

capacity. When completed Degussa

the leading

the transaction

producer

H202

but this deal will allow

Degussa

of Co exchanged oxide catalysts as measured

increase its share while the overall market capacity will

the productivity

in Britain October 19971

of 20 than the best complex

oxide

point out that metal cations

zeolites

provide

unique

catalytic

with a higher

catalysts.

The

exchanged

into

centres,

site density

achieved with conventional

than can be

oxides.

Technologies and equipments with serious environment (air) pollution being superseded in China The State

Economy

and Trade Commission,

Protection

plants

a range

of solvents

a control and recovery

BOCs Kryoclean including

produced

by

system works with methylene

Applied catalysis 6: environmental

chloride,

nese), specify

4th

(Science September

and Technology 1997). The

the superseded

which involves

technologies

with serious environmental

equipment

a total of fifteen

(air) polluDaily

new

that it will be illegal to produce,

or utilize

the

Agency and the Ministry

Building of China, have jointly announced

tion reported

chemical

as Lewis

[Source: JCS, Chem. Commun. p. 2103,1997]

and equipment

compounds

produc-

was also greater by a factor

authors

of Machine

VOC removal by condensation

organic

a yield

of the catalyst

a list of the first batch of superseded

system for volatile

the best

only achieved

by the molar rate of acetonitrile

State Environment

BOC Gases has developed

They

comprised

into beta zeolite. Previously for this reaction

of 2.6 %. In addition

yields

to

remain static. [Source: Chemistry

improved

ammoxidation.

will make

of H202 in the USA.

Analysts have warned that the H202 market is already at overcapacity,

ethane

in JCS, Chem.

yields of 26% over a catalysts

acid sites, Degussa and DuPont have signed a letter of intent Degussa

from

tion per gram of catalyst

Hydrogen peroxide business

whereby

and Industry October 19971

flue gas

(Chi-

regulations sell, import

from the list,

items. For example,

Volume 15 Nos. 3-4 -

5 February

1998