Abstract:
537,816. Metal phenates. STANDARD OIL CO. OF CALIFORNIA. Oct. 3, 1939, No. 27128. Convention date, Oct. 4, 1938. [Class 2 (iii)] [Also in Groups III and XIII] The properties of lubricating oils in respect of resistance to heat deterioration, decomposition causing piston ring sticking and corrosion of bearings are improved by the addition thereto of a metal phenate with a phenolic radical having more than 10 carbon atoms. The preferred phenates are those containing alkayl groups. Metals mentioned include sodium, potassium, beryllium, calcium, strontium, barium, magnesium, zinc, cadmium and aluminium. Specific compounds mentioned include sodium lauryl phenate, sodium cetyl phenate, calcium lauryl phenate, calcium cetyl phenate, calcium diamyl phenate, calcium heptyl phenate, calcium p-tertiary amyl phenate, calcium mono-chlor amyl phenate, calcium p-cyclohexyl phenate, aluminium lauryl phenate, aluminium di-cetyl phenate, magnesium cetyl phenate, barium cetyl phenate and calcium cetyl cresylate. Examples are given of the preparation of alkyl phenols from phenol and butene polymers by the addition of sulphuric acid to a mixture of phenol and the polymers followed by heating in an autoclave. The apparent molecular weight of the product depends on the exact composition of the polymers used and the degree of condensation. From products obtained by this process of different apparent molecular weights phenates of calcium, sodium, aluminium, magnesium and barium and prepared. An alkyl phenol is also produced by the addition of sulphuric acid to a mixture of cresylic acid and olefine polymers containing an average of 14 carbon atoms per molecule. The compound so obtained is reacted with calcium carbide to form the calcium salt which is used according to the process of the present invention.