Cadila Pharmaceuticals
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Sulfolane Business

Leveraging decades of manufacturing excellence, Cadila Pharma produces high-quality Sulfolane, supported by robust processes and dependable supply capabilities.

Technology Advantage - Reduced dependency on global players in the area of aromatic/hydrocarbon extraction, e.g. UOP, Shell, Lurgi, Krupp Koppers, etc.

New hydrocarbon processing units, oil refineries, and pharmaceutical plants will create employment opportunities for engineers and plant operators.

Removal of benzene from gasoline blending streams, reducing exposure to this highly carcinogenic compound.

The technology enables the production of valuable petrochemicals such as Benzene, Toluene, and Xylene from refinery and petrochemical feedstocks.

1994

Established the Speciality Chemicals Division for Sulfolane manufacturing.

1996

The plant became fully operational and commenced commercial production.

1997

Received the National Award for Comprehensive Chemical Technology Research in collaboration with CSIR-IIP, Dehradun.

1997 - 2015

Successfully served domestic market demand.

2016 - 2024

Expanded production capacity in response to growing market demand.

Cadila Pharma is the only manufacturer of Sulfolane in India, and it can service major domestic and export requirements.

<p>Setting the benchmark for sulfolane production</p>
  • Cadila’s Sulfolane plant is the only plant of its kind in India and Asia.
  • Developed using fully indigenous technology.
  • Offers top-class technology, braving stiff competition from established multinational giants.
  • Supporting the Atmanirbhar Bharat initiative.
  • Dedicated Plant Capacity: 70 MT/month
  • The plant is expandable:
    Phase 1: 100 MT/month
    Phase 2: 150 MT/month (based on future demand)

Sulfolane is also known as:

  • (Cyclo)tetramethylene sulfone
  • 2,3,4,5-Tetrahydrothiophene-1 , 1-dioxide
  • Thiocyclopentane-1, 1-dioxide

Features

  • An excellent solvent for many classes of organic compounds and polymers
  • Highly polar with outstanding chemical stability
  • Completely miscible with water
  • Safe to handle (very low toxicity)

Availability

  • Sulfolane Anhydrous (Water Content: Max. 0.25 wt%)
  • Sulfolane Aqueous (Water Content: Max. 3.0 wt%)

Packing

  • 250 kg net MS drums
  • Tanker loads available
  • Small packs available on request

From aromatic extraction to acid gas treatment and advanced distillation, Sulfolane supports complex industrial operations where efficiency, selectivity, and stability matter most.

Aromatic Extraction
  • starExtraction of Benzene, Toluene, Xylene and other Hydrocarbons from the Catalytic reformate and Pyrolysis naphtha
  • starProduction of food-grade hexane for the extraction of edible oils
  • starDereformisation of Kerosene for Aviation Turbine Fuel and Superior Kerosene
  • starProduction of gasoline, jet fuels and special boiling point (SBP) solvents

PropertyInternational SpecificationTypical Value of CPL Sulfolane-ANTest Method
Composition,wt% Sulfolane (Water-free, min.)99.00>99.5Gas Chromatography
Density at 30o C,g/ml1.26-1.271.26-1.27ASTM D 941
Thermal Stability, SO2 ppm, max.65.00<28.0IIP Test Procedure
Water, wt%, max.0.25< 0.25ASTM D 1744
Ash Content, wt% max.0.10TracesASTM D 482
Distillation (Anhydrous material) % Distilled at 282o C 288o C0.5% (max)Nil 100%ASTM D 1078
Isopropyl Sulfolnyl Ether (dry basis)0.5% (max)TracesGas Chromatography
Sulfolene O2 (dry basis)0.2% (min)TracesGas Chromatography

PropertyInternational SpecificationTypical Value of CPL Sulfolane-ANTest Method
Composition,wt% Sulfolane (Water-free, min.)99.00>99.5Gas Chromatography
Density at 30o C,g/ml1.26-1.271.26-1.27ASTM D 941
Thermal Stability, SO2 ppm, max.65.00<28.0IIP Test Procedure
Water, wt%, max.02.9< 2.9ASTM D 1744
Ash Content, wt% max.0.10TracesASTM D 482
Distillation (Anhydrous material) % Distilled at 282o C 288o C5 (max) 95 (Min)Nil 100%ASTM D 1078
Isopropyl Sulfolnyl Ether (dry basis)0.5% (max)TracesGas Chromatography
Sulfolene O2 (dry basis)0.2% (min)TracesGas Chromatography

CAS No. : 126-33-0 

Sr. No.ContentUnitSpecificationTest Method
01Assay (Dry Basis)Wt%99.97 – 99.99IIP procedure (IIP 3303-02)
02Density at 30°Cg/ml1.26–1.27ASTM-D 941
03Thermal Stability mg SO₂/250 ml (Dry Basis)ppm20 (max)UOP-599-68 / IIP Method
04WaterWt%0.25 (max)ASTM D 1744
05Ash ContentWt%0.1 (max)ASTM D 482
06Acid Number-0.5 Max.ASTM-D-974
07ColorHazen300 Max.ASTM-D-1209
08*pH (SFA: Water) 1:1-2.0–9.0ASTM E-70
09Description (Appearance)-Colorless to Pale straw liquidEye Balling

CAS No. : 77-79-2 

Sr. No.ContentUnitSpecificationTest Method
01Assay (Dry Basis)Wt%99.0 (min)IIP procedure (G.C) (IIP 3303-02)
02Ash ContentWt%0.1 (max)ASTM-D 482
03Description (Appearance)-White to off white crystalsEye Balling
04Moisture Content% w/w< 1.0%ASTM D-1744
05Melting Point°C62–65-
06Sulfur Content%NLT 27.0%-

For inquiries related to Sulfolane, please reach out to:

Email ID
Email ID

scsbu@cadilapharma.com

Mobile Number
Mobile Number

+91 9710900071, +91 9099970028

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