Patent GB-560529-A (GB)
Title: Preparation of stabilized edible substances
IPC: C11B5/00
Filed: 1942-04-16
Abstract: Edible substances are stabilized by incorporating therewith a crude or partially refined scrum derived from the vacuum carrier-gas treatment of crude animal or vegetable oils containing tocopherol, particularly corn, cotton seed and soyabean oil, and subjecting the mixture to deodorization without substantially affecting the tocopherol.  The scum is dissolved in a glyceride or mixed with a finely-ground material, such as wheat or corn germ or wheat middlings.  Hydrogenated cotton-seed, soyabean, corn or olive oil and refined oils may be treated.  A mixture of glyceride and scum may be refined by alkali treatment before or after deodorization.  Water may be removed from the scum by heating and separating the resultant oil layer and the scum may be treated with a mineral oil to remove metals and their soaps or with acid and zinc dust to reduce tocopherol oxidation products. Deodorization may be effected with a carrier gas under reduced pressure, e.g. with steam at a temperature between 150 DEG  and 250 DEG  C. at a pressure less than 12 mm., or by short path distillation under vacuum, as described in U.S.A.  Specification 2,249,524. The colour of the product may be improved by filtering through activated carbon or an activated earth.  Examples of the treatment of prime steam lard and butter fat are given.  One of the lard products is added to margarine to provide .02 per cent mixed tocopherols and ten thousands units of vitamin A per pound are also incorporated.  The butter fat product is suitable for adding to butter or margarine in the proportion of one part to 10-250 parts. Specifications 548,731 and 557,872, [Group VI], are referred to.ALSO:Edible substances are stabilized by incorporating therewith a crude or partially refined scum derived from the vacuum carrier-gas treatment of crude animal or vegetable oils containing tocopherol, particularly corn, cotton-seed and soybean oil, and subjecting the mixture to deodorization without substantially affecting the tocopherol.  The scum is dissolved in a glyceride or mixed with a finely-ground material, such as wheat or corn germ or wheat middlings.  Hydrogenated cotton-seed, soybean, corn or olive oil and refined oils may be treated.  A mixture of glyceride and scum may be refined by alkali treatment before or after deodorization.  Water may be removed from the scum by heating and separating the resultant oil layer and the scum may be treated with a mineral acid to remove metals and their soaps, or with acid and zinc dust to reduce tocopherol oxidation products. Deodorization may be effected with a carrier gas under reduced pressure, e.g. with steam at a temperature between 150 DEG  and 250 DEG  C. at a pressure less than 12 mm., or by short path distillation under vacuum, as described in U.S.A. Specification 2,249,524. The colour of the product may be improved by filtering through activated carbon or an activated earth.  Examples of the treatment of prime steam lard and butter fat are given.  One of the lard products is added to margarine to provide .02 per cent mixed tocopherols and ten thousands units of vitamin A per pound are also incorporated.  The butter fat product is suitable for adding to butter or margarine in the proportion of one part to 10-250 parts. Specifications 548,731 and 557,872 are referred to.