| 摘要 |
FIELD: petrochemical processes. ^ SUBSTANCE: additive is prepared by interaction of (i) sulfured alkali metal alkylphenolate with alkaline number below that of prepared additive; diluting oil; C12-C26-carboxylic acid functioning as modifier in presence of catalyst; C1-C4-carboxylic acid alkali-earth metal salt; C3-C4-alkylene glycol; and alcohol containing at least 8 carbon atoms; and boric acid-modified Mannich base prepared by condensation of alkylphenol with ammonia and formaldehyde taken at weight ratio to sulfured alkylphenolate equal to (0.005-0.5):1 with (ii) alkali-earth metal hydroxide added to reaction mixture at 130-190 portionwise in the course of reaction after addition of each alkali-earth metal hydroxide portion. ^ EFFECT: increased hydrolytic and colloidal stability of additive. ^ 1 tbl, 9 ex |
