GB832377A - Improvements in the manufacture of margarine - Google Patents

Abstract

An oil having the melting characteristics of butter, as characterized by a solid content index value for temperatures of 50-92 DEG F. within the range of values obtained with butter oils, is produced by co-randomizing a mixture containing 30-50% of palm oil with 70-50% of coconut oil, or 40-50% of palm oil with 60-50% of palm kernel oil, or a mixture of 30-50% of palm oil, 0-60% of palm kernel oil and 70-0% of coconut oil, the lower limit for the percentage of palm oil progressively increasing from 30 to 40% as the amount of palm kernel oil increases from 0 to 60% and the amount of coconut oil correspondingly decreases from 70 to 0%; the co-randomized mixture of oils may be blended with other glyceride oils such as peanut, cottonseed, soya bean, palm or coconut oil, hydrogenated or unhydrogenated, or hydrogenated whale oil, in such proportions that the solid content index for the blend remains within the range for butter oils. According to an example, a refined hydrogenated mixture of palm oil and coconut oil within the above-stated proportions is heated to 340 DEG F. under 10 mm. Hg vacuum until dry. After addition of a catalyst, e.g. 0.22% glycerine and 0.7% sodium hydroxide as a 49% solution in water, or sodium methylate, the co-randomization is effected by maintaining the mixture at 340-360 DEG F. under 10 mm. Hg vacuum until two successive samples show closely agreeing values of solid content index. The mixture is then cooled to 140 DEG F., waterwashed, settled, decanted, filtered and deodorized. Throughout the heating, reacting and cooling the mixture is maintained in an atmosphere of nitrogen and is agitated mechanically.ALSO:An oil, suitable for use in margarine manufacture and having the melting characteristics of butter as characterised by a solid content and index value for temperatures of 50-92 DEG F. within the range of values obtained with butter oils, is produced by co-randomising a mixture containing 30-50% palm oil with 70-50% coconut oil, or 40-50% palm oil with 60-50% palm kernel oil, or a mixture of 30-50% palm oil, 0-60% palm kernel oil and 70-0% coconut oil, the lower limit for the percentage of palm oil progressively increasing from 30% to 40% as the amount of palm kernel oil increases from 0% to 60% and the amount of coconut oil correspondingly decreases from 70% to 0%; the co-randomised mixture of oils may be blended with other glyceride oils such as peanut, cottonseed, soyabean, palm or coconut oil, hydrogenated or unhydrogenated, or hydrogenated whale oil, such that the solid content index for the blend remains within the range for butter oils. According to an example, a refined, hydrogenated mixture of palm oil and coconut oil within the above-stated proportions was heated to 340 DEG F. under 10 mim. Hg vacuum until dry. After addition of a catalyst e.g. 0,22% glycerine and 0,7% sodium hydroxide as a 49% solution in water, or sodium methylate, the co-randomisation was effected by maintaining the mixture at 340-360 DEG F. under 10mm. Hg vacuum until two successive samples showed closely agreeing values of solid content index. The mixture was then cooled to 140 DEG F, water-washed, settled, decanted, filtered and deoderized. Throughout the heating, reacting and cooling, the mixture was maintained in an atmosphere of nitrogen and was agitated mechanically. In determining the solid content index a method slightly modified from that published in J. Amer. Oil Chemists' Soc. XXXI 98 was employed.