Thermal Stability of Sulfolane

The tests siiinmarized below were made with Sulfolane containing 10 mg of SO2 per 250 ml. Phillips Test Method PPCo-6533-CZ.  

Temperature C F SO, (mg.) Liberated Per Hour From 250ml Sulfolane 

FINDINGS Sulfolane has good thermal stability up to and including 428° F, but has a rather sharp decomposition rate beyond this temperature. Excessive temperatures will cause Sulfolane to crack to a dark polymer and SOj. 

---

Table 2. Thermal Stability of Sulfolane in the Presenee of Various Substanees ...

---