Cradle to Consumer
Identity ID
bbd99a07-661a-4969-929c-26d989b47e38
Materials
Associated ID
c5689d7d-f2ca-446c-92c3-f78b402c3669
Included activities starts
Included activities ends
Description
This is a market dataset representing the consumption market in the region. It includes transportation of the product from the factory gate to consumption, with transport services calculated according to the regional transportation conditions for the product.
Activity Description
The ion-exchange membrane process for caustic soda production includes salt dissolution, primary purification, secondary purification, electrolysis, and dilute brine dechlorination steps. Chlorine and hydrogen are co-produced in this process.
Process Description
Sodium hydroxide, CAS number: 1310-73-2, also known as caustic soda or lye, has the chemical formula NaOH. It is a highly corrosive strong base that is highly soluble in water. Pure solid sodium hydroxide appears as white, while pure liquid caustic soda is a colorless and transparent solution. It is a fundamental chemical raw material widely used in industries such as chemical manufacturing, papermaking, petroleum, and textiles.
Time period
2014
2026
Geography
China,Hunan
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Raw salt is heated after dissolving and primary/secondary purification, then fed into an ion-exchange membrane electrolyzer. Inside the cell, sodium ions selectively pass through the ion membrane; chlorine (Cl₂) is generated at the anode, while water reacts at the cathode to produce hydroxide ions (OH⁻) and hydrogen gas (H₂). The OH⁻ combines with sodium ions migrating from the anode compartment to form sodium hydroxide.