| 摘要 |
1481553 Overbased materials; lubricants; fuels LUBRIZOL CORP 23 Sept 1974 [5 Oct 1973] 41316/74 Headings C4X C5F and C5G Stable oil-soluble dispersions of overbased alkali sulphonates are made by contacting CO 2 , H 2 S, SO 2 or mixtures of these with a mixture comprising (i) one or more oil-soluble sulphonic acids or derivatives thereof that can be overbased, (ii) one or more alkali metals, alkalimetal hydrides or basically reacting compounds of alkali metals, (iii) one or more lower aliphatic alcohols and (iv) one or more oil-soluble carboxylic acids or derivatives thereof, all in specified proportions. Volatile materials, including the alcohol (iii) and the water formed in the reaction may be stripped from the product, which is filtered and is then suitable as an additive for fuels and lubricants. Preferably the reaction is carried out in an inert solvent, e.g. a hydrocarbon fraction of a kind suitable for inclusion in the fuel or lubricant. The Specification includes lists of materials usable as reagents and solvents in the preparation of the overbased materials, as lubricants and fuels to which the overbased materials can be added and as other additives to be used in combination with the overbased materials. |
