Technical Paper
Research and Development of High TBN Ca-Phenates
1997-10-01
972955
Recently, numerous researches of overbased calcium sulfurized alkylphenates focused on their total base number (TBN) were reported. And it's well known that a increase of TBN(typically, greater than 300 mg KOH/g) was effective to reduce their cost. However, calcium sulfurized alkylphenates having a TBN greater than 300 have several problems on their unsatisfied performance, such as thermal stability. COSMO PETROTECH Co., COSMO RESEARCH INSTITUTE, and COSMO OIL Co. have developed a calcium sulfurized alkylphenate “PAD-450” having the TBN greater than 400mgKOH/g. “PAD-450” has similar performance with conventional calcium sulfurized alkylphenates (TBN =250mgKOH/g) on usual laboratory tests and a marine engine test. The innovational performance of PAD-450 is based on our specific procedure to increase TBN.
