GB384715A - Apparatus for carrying out the manufacture and production of neutral products from oiats - Google Patents

Abstract

<PICT:0384715/III/1> <PICT:0384715/III/2> Fats or fatty oils are made neutral by the process described in Specification 273,276, [Class 91, Oils &c.], according to which the free fatty acids contained in the oil are removed by distillation and are then heated with a deficiency of glycerol or other polyhydric alcohol and the resulting esterification mixture is returned to the oil undergoing distillation. A suitable apparatus comprises a still A, Fig. 2, in which a fatty oil such as peanut or sesame oil is treated with superheated steam, and connected through a pipe B to a heated condenser to 70 DEG C. in which the fatty acids condense and pass through a pipe F to a vessel G, and water vapour passes to an injector condenser D. The apparatus is evacuated by a pump E. The fatty acids, if desired mixed with other fatty acids such as butyric or maize oil acids, are heated to 180-260 DEG C. in the vessel G and partially esterified with glycerine admitted from a vessel J. Water vapour formed during the reaction passes through a reflux condenser N to the condenser D. The resulting esterification mixture containing about 5 per cent of free fatty acids passes through an overflow pipe K into the still A. The still A may be of the type described in Specification 277,085, [Class 91, Oils &c.], or may consist of a column containing baffle plates, or a series of walls Z, Fig. 4a, in which the oil is heated in a thin layer by steam admitted at the bottom of the column. Esterification may be effected in the presence of catalysts such as tin or magnesium. The neutralized oil may be further purified by treatment with alkalies. Specifications 159,587 and 213,267, [both in Class 91, Oils &c.], also are referred to.