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) by burning, then catalytically oxidize
to sulfur trioxide (
) using vanadium pentoxide (
) catalyst. This exothermic conversion occurs in a multi-bed catalytic converter (contact kettle) to achieve 98-99%+ efficiency before reacting
with organic materials, producing high-quality surfactants, LABSA, or SLES.
Key Components in
Conversion
- Sulfur Burner: Liquid sulfur is burned with dry air to produce gas.
- Catalytic Converter (Converter): A multi-layer packed tower, typically with 4 beds of catalyst, convertsto.
- Temperature Control: Because the conversion is exothermic, multiple beds with interstage cooling are used to manage temperature and ensure maximum yield.
- Cooler: The producedis cooled by a heat exchanger before entering the sulphonation reactor.
Process Features
- High Efficiency: Modern plants (e.g., from NJ Weixian or Ballestra) use specialized catalysts and design to achieve conversion rates greater than 98–99.9%.
- Heat Recovery: High-temperature conversion heat is recovered to produce steam for melting sulphur and other heating needs.
- Protection: Specialized design (e.g., Weixian's floating type) prevents intergranular corrosion in coolers.
The resulting
is typically used in a film reactor for sulfonation, which is essential for manufacturing detergents and other surfactant products.
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Sulphonation plant SO₂/SO₃ conversion unit
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-so2so3-...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-so2so3-...
Liquid sulfur goes to the sulfur burner by precise measurement and fully combusts with dry air to generate SO₂; after cooling, SO₂ gas goes to the converter ...
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Metallurgical Plants for Sulfuric Acid
Ballestra S.p.A.
https://www.ballestra.com › Chemicals › Sulfur
Ballestra S.p.A.
https://www.ballestra.com › Chemicals › Sulfur
Key Process Steps for Metallurgical Plants: SO₂-containing gas quenching and cleaning; Dry catalytic conversion of SO₂ to SO₃; Heat recovery for gas heating ...Read more
Sulphonation plant converter
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-converter
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-converter
After cooling, SO₃ gas goes to sulphonation/sulfation unit; SO₂ and SO₃ gas are cooled by cooling air through tube type heat exchanger; after heat exchanging, ...Read more
2025 SO₃ Sulphonation Plant: Advanced Technology ...
ASIA Chemical
https://www.asiachmical.com › News
ASIA Chemical
https://www.asiachmical.com › News
May 23, 2025 — SO₃ Generation: Sulfur is melted, burned in excess air to produce SO₂, and catalytically oxidized to SO₃. The process integrates waste heat ...Read more
Industrial Chemistry:- Application of Sulfonation.💙💙⚡⚡🔥🔥💨
Facebook · Knowledge of Science by SHB
30+ reactions · 5 years ago
Facebook · Knowledge of Science by SHB
30+ reactions · 5 years ago
Reaction with Oxygen: Forms SO₂ and SO₃ (sulphur trioxide). OCCURRENCE & EXTRACTION Natural Sources: Found in volcanic regions, as ...Read more
Plants for Sulfur Burning
Ballestra S.p.A.
https://www.ballestra.com › Chemicals › Sulfur
Ballestra S.p.A.
https://www.ballestra.com › Chemicals › Sulfur
Here's an overview of the key steps. Sulfur melting and atomisation; Sulfur combustion; Dry catalytic conversion of SO₂ to SO₃; Absorption in concentrated acid ...Read more
EP3580168B1 - Converter for converting so2 into so3
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
The conversion of SO2 to SO3 takes place in a so-called contact tank. A contact kettle is a main component in the sulfuric acid plant and is also referred to as ...Read more
high-efficiency sulphonation plant for fine chemicals
qinoace.com
https://www.qinoace.com › sulphonation-plant
qinoace.com
https://www.qinoace.com › sulphonation-plant
Manufacturing process units · Molten Sulphur System · Air drying system · SO₂ Gas System · Conversion Tower System.Read more
sulphonation plant SO₂ SO₃ converter
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-so2-so3...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sulphonation-plant-so2-so3...
The conversion tower adopts vertical SS304 stainless steel packed structure with a temperature resistance of 700°C. It is featured in stable conversion rate, ...Read more