waterglass

§    Identifikasi

                        Nama Produk           : Sodium Silicate : Solid & Liquid

                        Nama Lain                : Waterglass (liquid), Soluble Glass, Silicate of                                                             Soda

                        CAS Number                        : Solid (cullet/lump) :  1344-09-8

                                                              Liquid :  7732-18-5

                        Formula                     : Solid             :  Na₂O.nSiO₂

                                                                              Liquid            :  Na₂O.nSiO₂. xH₂O

                                                             n : weight ratio : SiO₂/Na₂O

                                                             2 produk utama :   n = 2 (alkali)

                                                                                                n = 3 (neutral)

                  Raw Material             : Silica Sand(SiO2): Purity Min 99%

                                                        Sodium Carbonate(Na2CO3)

                                                        or Soda Ash Dense: Purity Min 99%

                        Berat Molekul           : Na=23,  O=16,  Si=28,  H=1

§    Untuk merubah Weight Ratio (WR/n) ke Molar Ratio (MR/m) :

                  Molar              = Weight/BM

                  Molar Ratio    = (Weight SiO₂/BM SiO₂) / (weight Na₂O/BM Na₂O)

                  M                     = n x BM Na₂O/BM SiO₂ = n x 62/60 = 1.032n

                  WR                 = %SiO2/%Na2O(%by w/w)

§    Berat Molekul artinya jumlah berat atom total dari penyusun molekul

§    Berat atom adalah berat (massa) penyusun atom (proton, neutron dan         electron) relatif terhadap massa atom C12

                                                  

SIFAT & KARAKTERISTIK

Parameter	Solid	Liquid
Appearance (kenampakan)	WR2  :  Bluish WR3  : Greenish	Cloudy till Clearly
Bau ( Odour)	Tak berbau (Oderless)	Tak berbau (Oderless)
pH	WR3  :  Approx 11.7 WR2  :  Approx 12.7	WR3  :  Approx 11.5 WR2  :  Approx  12.5
Kelarutan (Solubility)	WR3  :  Slowly in all portion WR2  :  in all portion	All
Density	WR3  :  Bulk, approx 88lbs/ft3 WR2  :  Bulk, approx 90lbs/ft3	Depend on spec (1.3 -    1.6 kg)
Volatility	Unvolatil	Unvolatil
Bolling Point	Not Measured	WR2 approx 110C WR3 approx 130C
Viscosity	Not Measured	Up to spec

PHYSICAL & CHEMICAL PROPERTIES

         

PHYSICAL

1.        Spesific Gravity(sg): Mass pervolume(kg/m3 or g/cm3) at 20^oC

2.        Baume: 145-145/sg at 20oC

3.        Viscosity: Internal resistance to flow(kekentalan) in cPs  or g/(cm.s) at 20^oC or 25^oC

4.        Solubility in water: All

5.        pH= 11.50-13.00

CHEMICAL

1.        Alkalinity(%Na2O, w/w): %Na2O(Natrium Dioxide) %by weight/weight

2.        Silica(%SiO2, w/w): %SiO2(Silicon Dioxide) %by weight/weight

3.        Weight Ratio(%SiO2/%Na2O, %w/w)

4.        Molar Ratio(%SiO2/%Na2O, %mole/mole): WR*1.032

PEMBUATAN (Derivation)

Ø   Bahan baku

            Soda Ash Dense (Na2CO3) à purity >99%

                        Source SAD : China, India, USA

            Silica Sand (SiO2) à purity 99%

                        Source SiO2 : Belitung

Ø   Proses :

            Peleburan soda ash dan silica sand di reaktor furnace firebrick        pada   T=1100-1400C

TESTING METHODE

Parameter	Unit	Methode
Na2O	%w/w	Titration
SiO2	%w/w	Gravimetri
SG	Relatif to water (g/cm3)	Piknometer
Baume	0BE	Calculation
WR	SiO2/Na2O	Calculation
Solid Content	%w/w	Calculation
Viscosity	cPs	Viscometer

SNI 06-0127-1987

CHEMICAL:

 1.     Alkalinity (%Na2O, w/w): Titration using Hydrochloric Solution and indicator Methyl Orange (mo)

 2.     Silica (%SiO2, w/w : Gravimetri

 3.     Weight Ratio (%SiO2 / %Na2O, %w/w) : Calculation from %SiO2 / %Na2O

 4.     Molar Ratio (%SiO2 / %Na2O, %mole/mole)                                        Sodium Silicate : WR*1.032

SNI 06-0127-1987

PHYSICAL :

 1. Spesific Gravity(sg)        :   by using Picnometer

 2. Baume                              :   145-145/sg at 20oC(Calculation from sg)

 3. Viscosity                           :   Viscotester

PHYSICAL & CHEMICAL PROPERTIES CORRELATION

Viscosity        :           Higher WR                            Higher Viscosity

                                    Lower WR                             Lower Viscosity

                                    Higher Temperature            Lower Viscosity

                                    Lower Temperature             Higher Viscosity

pH                   :           Higher WR                            Lower pH

                                    Lower WR                             Higher pH

Alkalinity        :           Higher WR                            Lower Alkalinity

                                    Lower WR                             Higher Alkalinity

Silica              :           Higher WR                            Higher Silica

                        Lower WR                             Lower Silica

PRODUCT SPECIFICATION RANGE

Liquid                       

  Weight ratio             : 1.6-3.3

  Baume                     : 35-58(at 20oC)

  WR 2                        : Alkaline type

  WR 3                        : Neutral type

Solid

  WR 2.00-3.30