Patent GB-352512-A (GB)
Title: Improvements in the separation of the oxidation products of solid hydrocarbons, waxes and like materials
IPC: C07C51/42
Filed: 1930-01-13
Abstract: The products of an incomplete oxidation of solid hydrocarbons p  are separated from unchanged initial material, and the constituents of the oxygenated material separated from each other by centrifugal treatment, if desired in the presence of a diluent, and at a temperature at which the constituents to be removed are liquid.  The acidic products may first be removed by saponification, and the unsaponified residue separated into its components by centrifuging at different temperatures.  A crude oxidation product of paraffin wax or of a substance containing it such as gas oil, is distilled according to the process described in Specification 322,437, [Class 2 (iii), Dyes &c.], and the acidic constituents of the distillate are saponified.  The unsaponified residue is mixed with methanol and centrifuged at 15 DEG  C. to yield a product consisting of high molecular alcohols and ketones and a residue of unoxidized wax.  The acids obtained from the saponified fraction are centrifuged at 15 DEG C. to yield liquid acids similar to olein and a pale solid fraction of setting point 41 DEG  C.  The latter fraction is again centrifuged at 30-32 DEG  C. to yield acids melting at 30 DEG  and 46 DEG  C. Methanol may be replaced by benzine, acetone, methyl formate or similar esters, carbon tetrachloride, or solutions of sulphur dioxide in methanol or ethanol.  These solvents may also be used to wash the isolated substances.  The centrifuge used is preferably provided with wool or flannel filtering material, or with a fine-meshed aluminium sieve.  Specifications 287,514, 309,875, [both in Class 91, Oils &c.], and 324,189, [Class 2 (iii), Dyes &c.], also are referred to.ALSO:The products of an incomplete oxidation of solid hydrocarbons are separated from unchanged initial material, and the constituents of the oxygenated material separated from one another, by centrifugal treatment, if desired in the presence of a diluent, and at a temperature at which the constituents to be removed are liquid.  The acidic products may first be removed by saponification, and the unsaponified residue separated into its components by centrifuging at different temperatures.  A crude oxidation product of paraffin wax, or of a substance containing it, e.g. gas oil, is distilled according to the process described in Specification 322,437, [Class 2 (iii), Dyes &c.], and the acidic constituents of the distillate are removed by saponification.  The unsaponified residue is mixed with methanol and centrifuged at 15 DEG  C. to yield a product consisting of high molecular alcohols and ketones and a residue of unoxidized wax. The alcohols may be separated from the ketones by further centrifuging. The acids obtained from the saponified fraction are centrifuged at 15 DEG  C. to yield liquid acids similar to olein, and a pale solid fraction of setting point 41 DEG  C.  The latter fraction is again centrifuged at 30 to 32 DEG  C. to yield acids melting at 39 DEG  and 46 DEG  C.  Methanol may be replaced by benzine, acetone, methyl formate or other esters, carbon tetrachloride, or solutions of sulphur dioxide in methanol or ethanol.  These solvents may also be used to wash the isolated substances.  Specifications 287,514, 309,875, and 324,189, [all in Class 2 (iii), Dyes &c.], are referred to.