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INDUSTRI SODA

Soda Ash dan Caustic

Soda

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SODA ASH (Na2CO3)

• Bentuk hidrat : Sodium carbonatmohonidrat, sodium carbonat heptahidrat,sodium carbonat decahidrat

Monohidrat : Na2O!"#2O   $%"&$ ' Na2O! ()&,%2 ' air

#eptahidrat : Na2O!"*#2O  &%"* Na2O! ( &%"!' air

Decahidrat : Na2O!")+#2O-sa. soda/ atau -0ashin1 soda/ !*,+3 Na2O! ( 32,4& ' air

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PROSES PEMBUATAN SODA ASH

• 5e B.anc 6rocess

•  Trona 6uri7cation 6rocess

• Dua. 6rocess

• SO58A9 6rocess atau AmmoniaSoda6rocess

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Soda Ash : 5e B.anc 6rocess

• Le Blanc roasting salt cake + carbon + limestone

dalam rotary furnace, leaching the product with water  

SODA AS !"a#$O%&

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5e B.anc 6rocess

Reaksi 6embentukan Soda Ash pd 5e B.anc 6rocess :

2Na.(#2SO&  Na2SO&(2#5

&(Na2SO& Na2S(&O

Na2S(aO!

  Na2O!(aS Treatment o; aS :

aS ( #2S  aS#2

aS#2 ( O2 ( #2O  aO! ( 2 #2S

#2S ( < O2  #2O ( S

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SODA AS# : Trona 6uri7cation6rocess

 TRONA : Minera. karbonat den1an rumus kimia Na!O!

#O!=2#2O

Ada 2 >enis proses :

)" ?a.sinasi trona

 impure soda ash

 puri7cation

 pure soda ash MONO#IDRAT@ 6RO@SS

2" ?a.sinasi puri7ed sesuisodiumcarbonat dari trona

SODIUM S@SUIARBONAT@ 6RO@SS

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 Trona 6uri7cation 6rocess :Monohidrate 6rocess

?a.sinasi trona pada rotarC ki.n )%+!++ de1   dekomposisi sodium sesuicarbonatNa2O!"Na#O!"2#2O Na2O!, #2O, O2

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 Trona 6uri7cation 6rocess : SodiumSesuicarbonate process

rushed trona  disso.e  saturated mother.iuor"

Ssaturated mother .iour  eaporated inaccum crCstra..iEers, coo.ed to &+ de1  krista. sodium sesuicarbonate centri;u1e  krista. sesuicarbonate

?rista. sesuicarbonate  ka.siner 2++ de1  

soda ash

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SO58A9 6rocess

Bahan Baku :

Brine Na., komposisi 2$' 0F0

Batu kapur aO!

Ammonia

Reaksi oera.. :

?onsep proses : ?arbon dioksida dia.irkan ke da.am .arutan 1aram >enuh

den1an ammonia akan men1hasi.kan natrium hidro1en

karbonat"N#! ( #2O ( O2 H N#&#O!

NaI ( N#&#O! H Na#O! ( N#&I

?onersi natrium hidro1en karbonat  Natrium ?arbonat

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B5O? DIARAM So.aC 6rocess

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TAHAP PROSES (1)

• (i) Aonia a!so"!#"

2NH3 $ H2O $ CO2 % (NH&)2 CO3 

AdanCa kandun1an a dan M1 pada .arutan

brine : aI2 ( N#&2 O! H aO! J ( 2N#&I

M1I2 ( N#&2 O! H M1O! J ( 2N#&I

• (ii) Ca"!onation To'#" (SOA* TO+ER)

N#! ( #2O ( O2 H N#&#O! 

NaI ( N#&#O! H Na#O! J ( N#&I

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TAHAP PROSES (2)

• (iii) ,i-t"ation

 The so.ution containin1 crCsta.s o; Na#O! is

dra0n oK ;rom the base o; the carbonation to0erand 7.tered to 1et Na#O

!"

• (i.)  The Na#O! obtained ;rom the aboe step

is heated stron1.C in ki.n to coert it into sodium

carbonate Na2O!2Na#O! H Na2O! ( O2 ( #2O

 The carbon dioLide produced here is sent tocarbonation to0er"

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TAHAP PROSES (&)

•  (.) Aonia "#co.#"/ to'#"

N#&#O! H N#! ( #2O ( O2 

2N#&I ( a O#2 H 2N#! ( 2#2O ( aI2 

(.i) i# 0i-n

 T )!++ ? 

aO! H aO ( O2 

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Caustic Soda (NaOH)

• Dipero.eh dari dekomposisi brineNa. secara e.ektro.itik"

• 6roses pembuatan : ' ?imia : 5imeSoda 6rocess

 ' @.ektrokimia : h.oro A.ka.i 6rocess

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h.oroA.ka.i 6rocess

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austic Soda den1an @.ektro.itik6rocess

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