| 摘要 |
<p>1,259,921. Oil in water emulsions. CHEVRON RESEARCH CO. 5 Jan., 1970, No. 507/70. Heading B1V. [Also in Division C3] Oil-in-water emulsions of waxy crude oils are obtained using composite surfactants comprising a mixture of (1) a surfactant of the general formula: where n is at least 30, and (2) a surfactant of the general formula: where n is 8 to 12. A third surfactant which is also preferably present has the general formula: C 13 H 27 O(CH 2 CH 2 O) n-1 CH 2 CH 2 OH where n is 8 to 12. The proportions are preferably 40 to 60% by vol. of (1), 20 to 35% of (2) and 10 to 25% of (3). The surfactant mixture is usually added to water and the aqueous solution mixed with the oil. The initial concentration of surfactant in water may vary, e.g. from 0.02 to 10% by vol. The oil-in-water emulsion may contain about 50 to 90% oil.</p> |
