| 摘要 |
PROBLEM TO BE SOLVED: To provide a new method for producing a Group II metal overbased sulfurized alkylphenol. SOLUTION: This invention relates to the new method for producing the Group II metal overbased sulfurized alkylphenol, which method uses ethylene carbonate as both a source of carbon dioxide and ethylene glycol, in particular, under the reaction conditions using ethylene carbonate. In the method, carbonation time is reduced to about one quarter the time in the prior art to produce Group II metal overbased sulfurized alkylphenol compositions. The invention relates to a detergent-dispersant additive composition comprising the Group II metal overbased sulfurized alkylphenols, wherein the Group II metal overbased sulfurized alkylphenols have each a reduced color as measured by ASTM Test No. D 6045 and an increased hydrolytic stability as measured by a modified ASTM Test No. 2619. The invention relates also to a process using ethylene carbonate or an alkyl-substituted ethylene carbonate and water for delivering in situ equimolar quantities of ethylene glycol and carbon dioxide for use as reactants in chemical reactions. COPYRIGHT: (C)2005,JPO&NCIPI |
