Patent GB-632990-A (GB)
Title: A process for the preparation of a product suitable for use as a lubricant, an addition to a lubricant, or capable of being used in the preparation of a lubricant or an addition to a lubricant
IPC: C08F240/00
Filed: 1946-04-12
Abstract: The process of the parent Specification (in which a product suitable for use as a lubricant or lubricant additive is prepared by subjecting a mixture of a polar aromatic compound and an excess of compounds with one or more double bonds and containing more than four carbon atoms to simultaneous alkylation and polymerization) is modified in that the alkylation and polymerization treatments are carried out successively (in either order) instead of simultaneously. Examples are given in which phenol, an octylphenol and salicylic acid are treated with a mixture of olefines obtained by cracking a paraffin wax distillate.ALSO:The process of the parent Specification (in which aromatic compounds containing one or more polar groups together with an excess of compounds with one or more aliphatic double bonds and containing more than four carbon atoms in the molecule are subjected to a simultaneous alkylation and polymerization treatment) is modified in that the alkylation and polymerization treatments are carried out successively (in either order) instead of simultaneously.  The aromatic compound may first be alkylated and the alkylation may then be continued while simultaneously polymerizing, or the olefinic compound may first be polymerized and then the aromatic compound may be alkylated, while at the same time continuing the polymerization.  In an example, one mol. of phenol is alkylated with 1.5 mol. of di-isobutylene at a temperature of 100 DEG  C. using 3 per cent by weight of concentrated sulphuric acid as a catalyst.  The reaction product is mixed with two mols. of a fraction of a cracked paraffin wax distillate with a boiling range of from 30-150 DEG  C., and composed of a mixture of C5-C10 hydrocarbons in which the olefines present are mono-olefines, and a polymerization and alkylation reaction is effected by maintaining the reaction mixture for 2 hours at a temperature of 60 DEG  C., using 3 per cent by weight of aluminium chloride as a catalyst.  Only the 2, 4 and 6 positions of phenol are said to be alkylatable when aluminium chloride or boron fluoride is used as catalyst and the alkyl groups contain more than four carbon atoms. An example is given also of the treatment of salicylic acid with a similar olefine mixture.ALSO:The process of the parent Specification (in which aromatic compounds containing one or more polar groups, together with an excess of compounds with one or more aliphatic double bonds and containing more than four carbon atoms in the molecule, are subjected to a simultaneous alkylation and polymerization treatment) is modified in that the alkylation and polymerization are carried out successively (in either order) instead of simultaneously.  The aromatic compound may first be alkylated and the alkylation may then be continued while simultaneously polymerizing, or the olefine may first be polymerized and then the aromatic compound may be alkylated, while at the same time continuing the polymerization.  In an example, one mol. of phenol is alkylated with 1.5 mol. of diisobutylene, at a temperature of 100 DEG  C., using 3 per cent by weight of concentrated sulphuric acid as a catalyst.  The reaction product is mixed with two mols. of a mixture of C5-C10 hydrocarbons containing monolefines and a polymerization and alkylation reaction is effected by maintaining the reaction mixture for 2 hours at a temperature of 60 DEG  C., using 3 per cent by weight of aluminium chloride as catalyst.  Only the 2-, 4-and 6-positions of phenol are said to be alkylatable when aluminium chloride or boron fluoride is used as a catalyst and the alkyl groups contain more than four carbon atoms.  An example is given also of the treatment of salicylic acid with a similar olefine mixture.