Bromine incorporation in sodalite

INORG. NUCL.

CIIEM. LETTERS

i~ROMINE

Vol. 8.

pp. 449-452.

INCORPORATION D.J. Th.W.

Philips

IN

1972,

Pergamon

Press.

Printed in Great Britain.

SODALITE

Schipper Lathouwers

Research

Laboratories

}]indhoven-Ne

t be Fland s

rRec~'ived 24 January 1972)

The (X

OH,

:

c~*v~t;~llization

CI,

B~',

CI<~4~

(AI209.2Si02.2H20)

was

Cole,

and

Sticher

salts

~lnd

ihe

We sodium

in

and

to

bromase

solution amount ~ur

st, u d i e d

relation

sodium

and

<,nd of

titan

dependence

on

the

by

obtained

by

Ba~'rer.

on

of

the

We

bromine

t h(: t c - m p e r a t u r e ,

of

also on

bromide initial

~he

Cole

present the

The

(2), in

the

not

or

highest

hi~her

in

The

the

initial

the

results

dependence

hydrcKide

was

is

with

or

bromine

sodium

agreement

which

NaBr

in

sodalite

and

studied.

con%ainin~ either

concentration in

va2-io~is

was

temperature. in

13aFter

bromide

qualitatively

of

to

Barrer,

by

incorporated

hydroxide

incorporated

found

~el and

of

sodium

is

and

~moant

relation

a

meid

concentration

~oiuZion

J_ncorporaK:Lon

f'rom

the

in

kaolinite recently

in~)1'porazJ, on

silicic the

Na.+Al,,Si~01~X

recrystallizaLion

and

!~romine

cases

from

The of

sodalite

prtpe.red

aluminaZe

NaBr03,

CI03)

sodalite,

descrxbed

(1,2),

kinetics

of

ef

concentratir~n

reported

before.

E_x D e :r J_~,~o I I t ~t 1

Tile s a + t n p [ { ,++ xJl

wa[ei',

J :t t hi %

fo] [owin~

method

was

tlseO

+{{+c+:
A1

" , _tti~+n ~

111~:~1:;,~1 ~ ~ 7 " c ~ (

tesul

to

pt'epare

]++ : , ] ~
]L'+ ::~ ]

w[,s

~]:t s % c ) i x ' e f !

[ :tri~ j r', ~-'Yi ,-hi]< ! ~ ].[i~, ~ ~olution

m,,)(]]llm .>11~liilrtF: C O ~ %}',ILlOf J Ix£IS ;i~4t',%ti:[y ~], : ~ i{.t]q+)l.ttb.kt!

4 m[)tZ2F] t j , ~ 5

the

,lisso.L\ e;d

t') +~.!:. t!p~;

I

'

r:: ~

/+re

o~"

ill ~i] ttm].na to . + eftJ{n~ed

450

BROMINE I N C O R P O R A T I O N IN S O D A L I T E

by

filtering.

dissolved

Then

in

the

NaBr

or

filtrate

and

(Mallinckrodt

p.a.),

was

a

A

bottle

suspension.

was

rotated

some in

PTFE

in

an

experiments

the

oven at

initial

NaBr03

silicic

added

at

with

a

UCB

the

was

varied

giving

suspension

of

hzdroxide

was

Si02.xH20

stirring,

temperature The

p.a.)

acid,

containing

120°C.

solution

(both

Vol. 8, No. 5

80oc,

in

concentration

between

I N

and

$ N, t h e

bromide

concentration

between

0.5

N

and

3

N,

and

the

byomate

concentration

between

0.5

N and

2

N.

The

reaction

and

the

tained The

was

samples

bromide in

was

0.5

fire

were

content

after

washed,

method

and

or

equivalence

the

bromate

by

by

a

content

with

specific

point.

After

was

diffraction.

dissolving

titrating

with

powder

ob-

dried.

X-ray

determined

acid

the

5 days

and

identified was

N nitric

Volhard's mine

stopped

filtered,

The

the

AgN03,

samples

applying

Br-electrode dissolving

determined

by

to

the

deter-

bromate

soda-

iodimetrie

titration.

Results The tained in

Fig.

tion

I.

of

This

a

obtained

and

the

80oC

the

strongly

4 N,

but

80oC

At

is ~

zeolite

is

2 N.

sodalite 120°C

on in

is

the

the

ob-

presented

concentra-

initial

is

A,

(NaAISi0~)

concentration

( ~ 2 N)

sodalite

a hydro×ide

sodalite

acid

temperature.

concentration is 2 N,

Js

are

obtained When

the

obtained

(]

N

low.

Whe11

only

if

all

and the

2 N) hydroxide

tile

hydroxide at

12.27H20,

con-

bromide

sodalite

is

obtained

sodalite

is

not

formed

in

in

sodalite

all in

a

cases 2 N

solution. The

by

the

in

silieic

hydroxide

hydroxide

both

concentrations.

Na0H

on

the

if

concentration

studied,

depends of

of

bromide

centration

incorporated and

temperature

concentration bromide

bromine

and

also

discussion

aluminate

amount

salt

and

At

of

sodium

the

solution,

is

amount

from

and

was

highest

87~

weight).

of

the

Sodalite

amount

of

bromine

theoretical formed

at

maximum 120oc

(which

contained

formed is a

15. l~ slightly

at

Vol. 8, No. 5

BROMINE I N C O R P O R A T I O N IN S O D A L I T E

451

4N

15--

%.

I0

Ix] *IO

-

[OH']

2 N [OH-]

0

(J f-

-----80°C

/

I-I

I

I

I

of

of

bromide

the

hiNher

bromine

at

80oC

sodalite 72~

sodalite the from

of

(92~)

(see

bromine was

Fi~.

I).

obtained of

the

on

sodalite

the

as

initial

and

an

highest

even

maximum.

sodium

aluminate

is

hi~her

than

in

of

by

This

function

higher

bromate

amount" found

a

solution.

synthetizinN

from

content

mollt

amount sodalite

bromine

Barrer shows

and

et that

silieic

sodalite

in al.

(2)

in acid

obtained

kaolinite. The

incorporation

similar

to

bromine

incorporated

in

of

kaolinite

theoretical

prepared

bromine

The

from

in

(89.5~),

found

3

in solulion,

incorporated

concentration

amount

of

was

bromine

I

2

[Br-]

Amount

BrO 3-inc.

the

bromine

those

initial is

isotherms,

found

solution

necessary.

by

is

Barrer

hi~her is

For

as

et if

hi~her a maximum

shown

al.

(2).

the

bromine

but

a

yield

large of

in The

Fi~.

I,

amount

are of

concentration excess sodalite

of

452

I:IROMINE INCORPORATION IN SODALITE

containing

the

Ge±

containing

The

bromine

hi~her

if

by as

the

lower OH-

AI,

of

sodalite

hydroxide the

fact

both in

the

maximum

Mol/l

content

incorporated

of

0.4

the

explained Br--ions

theoretical

the

only

that

in

hydroxide

and the

However,

is

obtained

used

in

the

of

Chis

unexpected

is are

the

same

if

az

a hifLher

initial

result

a more

at

is

used.

$OeC

is

competi~ig

~

find

a

?his

Br--ions

be

site,

so

lower

is

with

can

h%ph~>r

hydroxide To

Br

lower,

the ]20°C

solution.

from

lattice

concentration,

incorporated.

is

synthesized

OH--ions

OH'-ions

bromine

O. 1_% M o l / l

concentration

sodalite

content

of

V~q. ~, N~, 5

the

amount

bromide

L.o n c e ~ t Z : c a < i o n a{n ex:~lane~tion

detailed

study

is

required.

Acknowled[ement We and

Dr.P.T.

L,C,

of

X-ray

like

Bolwijn

BastinGs

number the

would

the

for

to for

diffraction

and

R.M.

Barl"t'I" t J , F .

2.

R.M.

Barter

the

ro

C.

bromine Lan~ereis

<,:)

~ont~:.;l'c o C

!,,

i'oi' p e r f ' o r m i n ~

C()le~

e s

and

H.

Sticher,

J. C h e m . Soc. and

l)r. ,3, Z, V, ]JooFn

e×perimenIs.

Re.['@ r e l ] c

I.

{)uv T~hF[llks to

st:fmul~L%intd d i ~ c u s s i < n ~ t

determining

samples,

s

express

,I,F.Coie,

J.

C h e m . Soc.

(A) [A)

~#68,

2'~73

l~)T<}, 1 5 1 0