Soda lime CAS 8006-28-8 Soda lime granular Soda lime Sodium hydrox

Model: CaHNaO2
Place of Origin: Sichuan,China (Mainland)
Brand: MOSINTER
Molecular formula: CaHNaO2
Form: pellets
Molecular weight: 96.07
Appearance: Pink cylindrical particle mixtures
sensibility: Air & Moisture Sensitive
Sensibility: Air & Moisture Sensitive
Name: Soda lime

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Product Description

Payment & Shipping Terms Supply Capacity
Payment Terms:L/C, T/T, WUProduction Capacity:5000 Ton/Year
Min. Order:100 KilogramPacking:According to the...
Means of Transport:Ocean, Air, LandDelivery Date:within 7 days

Soda lime (8006-28-8)


ITEM

STANDARD

RESULT

Appearance

Pink cylindrical   particle mixtures

Conform

CO2   Absorption rate

>   25%

35.11%

CO2    Absorption

_

>   140 L

Moisture   absorption

< 7.5%

3.87

Moisture

10%—15%

11.25%

Grain hardness

>   80%

92%

Particle size

4 mesh screen overflow   < 1%

0.93%

Pass 40 mesh < 2%

0.19%


Chemical components

The main components of soda lime are

·                    Calcium hydroxide, Ca(OH)2 (about 75%)

·                    Water, H2O (about 20%)

·                    Sodium hydroxide, NaOH (about 3%)

·                    Potassium hydroxide, KOH (about 1%).


Undersea use

Exhaled gas must be passed through a "carbon dioxide scrubber" where the carbon dioxide is absorbed before the gas is made available to be breathed again. In rebreathers the scrubber is a part of the breathing loop. Color indicating dye was removed from US Navy fleet use in 1996 when it was suspected of releasing chemicals into the circuit. In larger environments, such as recompression chambers or submarines, a fan is used to maintain the flow of gas through the scrubbing canister.

Chemical reaction

The overall reaction is:

CO2 + Ca(OH)2 → CaCO3 + H2O + heat (in the presence of water)

The reaction can be considered as a strong-base-catalysed, water-facilitated reaction.

Mechanism:

1) CO2 → CO2 (aq) (CO2 dissolves in water - slow and rate-determining)

2) CO2 (aq) + NaOH → NaHCO3 (bicarbonate formation at high pH)

3) NaHCO3 + Ca(OH)2 → CaCO3 + H2O + NaOH (NaOH recycled to step 2) - hence a catalyst)

Each mole of CO2 (44 g) reacted produces one mole of water (18 g).

Category: Indicator Tracer Agent


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