Industry-leading SO₃ falling film sulfonation reactor technology for continuous, high-efficiency production of LABSA, SLES, SLS, AOS, MES, and specialty surfactants. Proven in 80+ installations across 30 countries.
Our SO₃ sulfonation production line utilizes gaseous SO₃ generated from sulfur combustion, processed through a multi-tube falling film reactor for continuous sulfonation and sulfation of organic substrates. This technology represents the global standard for manufacturing anionic surfactants including LABSA (Linear Alkyl Benzene Sulfonic Acid), SLES (Sodium Lauryl Ether Sulfate), SLS (Sodium Lauryl Sulfate / K12), AOS (Alpha Olefin Sulfonate), and MES (Methyl Ester Sulfonates).
Founded in 1999, Beijing Xinrui Baili has continuously refined the SO₃ sulfonation process, achieving industry-leading conversion rates exceeding 98%, minimal color development, and ultra-low unreacted oil content. Every plant is engineered to meet both GMP and environmental compliance standards.
Sulfonation Efficiency
Ultra-low unreacted
Our integrated production process ensures consistent quality through every step, from raw material intake to finished product dispatch.
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The SO₃ falling film sulfonation reactor is the heart of every modern sulfonation production line. It operates on the principle of co-current gas-liquid contact within a bundle of precision-machined vertical tubes. This design enables extremely rapid heat and mass transfer, resulting in high-quality surfactant products with minimal by-product formation.
Raw organic material (such as LAB for LABSA production, fatty alcohol for SLES/SLS production, alpha olefin for AOS production, or methyl ester for MES production) is distributed evenly across the top of each reactor tube, forming a thin descending film along the inner wall. Simultaneously, diluted gaseous SO₃ is introduced co-currently, reacting with the organic film as both flow downward.
Our SO₃ sulfonation technology delivers measurable advantages in product quality, operational efficiency, and total cost of ownership compared to conventional systems.
Achieve active matter content of ≥96% for LABSA and ≥70% for SLES with ultra-low dioxane levels (as low as 5 ppm). Our proprietary reactor design minimizes.
A single SO₃ sulfonation production line can manufacture LABSA, SLES, SLS, AOS, and MES products by simply switching feedstocks and adjusting process parameters.
Every installation includes a Safety Interlock System (SIS) and Emergency Shutdown Device (ESD) per IEC 61511, and SO₃ leak detection for multi-layer protection.
Heat recovery systems capture waste heat from the sulfur burner and reactor cooling circuits, reducing total energy consumption by 15-25%. Combined with optimized
Our SO₃ sulfonation technology serves diverse industries, producing essential surfactants for household cleaning, personal care, industrial applications, and enhanced oil recovery.
LABSA and SLES are the primary active ingredients in liquid dish soap, laundry detergent, and all-purpose cleaners. Our high-purity sulfonation ensures excellent foaming, grease-cutting performance, and skin mildness.
SLS and SLES with ultra-low dioxane content (≤5 ppm) are essential for shampoos, body wash, toothpaste, and facial cleansers. Our AEO sulfation plant technology produces cosmetic-grade surfactants meeting global safety regulations.
High-concentration LABSA and AOS products serve as raw materials for industrial cleaners, textile processing, leather treatment, and agricultural emulsifiers. Our scalable capacity (40–6,000 kg/h) meets any production volume requirement.
High-concentration LABSA and AOS products serve as raw materials for industrial cleaners, textile processing, leather treatment, and agricultural emulsifiers. Our scalable capacity (40–6,000 kg/h) meets any production volume requirement.
A complete SO₃ sulfonation production line consists of multiple integrated subsystems, each engineered and manufactured in-house to ensure seamless operation and long-term reliability.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Stainless steel sulfur melter with temperature-controlled combustion furnace, producing clean SO₂ gas with >99.5% conversion efficiency from solid sulfur feedstock.
Available in multiple capacity ranges to match your production requirements, from pilot-scale R&D units to full industrial production lines.
| Parameter | Pilot Plant | Standard Plant | Large-Scale Plant |
|---|---|---|---|
| Production Capacity | 40 - 200 kg/h | 500 - 2,000 kg/h | 3,000 - 6,000 kg/h |
| Reactor Tubes | 7 - 19 tubes | 37 - 91 tubes | 127-169 tubes |
| Products Supported | LABSA, SLES, SLS | LABSA, SLES, SLS, AOS, MES | LABSA, SLES, SLS, AOS, MES |
| Active Matter (LABSA) | ≥96% | ≥96% | ≥96% |
| Active Matter(SLES 70%) | ≥70% | ≥70% | ≥70% |
| Dioxane Content (SLES) | ≤10 ppm | ≤5 ppm | ≤5 ppm |
| SO₃ Conversion Rate | ≥98% | ≥98.5% | ≥99% |
| Unreacted Oil | ≤1.5% | ≤0.8% | ≤0.5% |
| Tail Gas SO₂ Emission | ≤100 mg/m³ | ≤50 mg/m³ | ≤50 mg/m³ |
| Control System | PLC + HMI | DCS + SIS | DCS + SIS + ESD |
| Floor Space Required | ~200 m² | ~800 m² | ~1,500 m² |
| Delivery Timeline | 4-6 months | 8-12 months | 12-18 months |
Discover our full range of sulfonation and specialty chemical production technologies.
We supply plants all over the world, from Saudi Arabia to Kuwait, from Ukraine to Greece, from Egypt to Nigeria.
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