| 摘要 |
1,146,173. Triaryl phosphates. GEIGY (U.K.) Ltd. 19 June, 1967 [18 June, 1966], No. 27316/66. Heading C2C. [Also in Divisions C3 and C5] Triaryl phosphate esters or a mixture of such esters are produced by contacting phenol with an alkylating agent containing from two to sixteen carbon atoms per molecule, and contacting the alkylated phenol product with a phosphorylating agent to produce a triaryl phosphate or mixture thereof, the proportion of alkylating agent being within the range of from 5% to 65% by weight of the phenol. Suitable alkylating agents are alkyl halides, alkanols or olefins, preferably an olefin or a mixture or two or more thereof, and the reaction is conveniently catalysed by a Lewis or Bronsted acid. The alkylation is preferably carried out in the presence of gaseous hydrogen halide. The alkylated phenol product may be used as such for the phosphorylation reaction or may be purified. The phosphorylation may be carried out using the same catalyst as in the alkylation or a different catalyst may be used. The preferred phosphorylating agent is phosphorus oxychloride. The products are useful as additives for lubricants, fuels and hydraulic fluids and as plasticizers for synthetic polymers. |
