Patent GB-201968-A (GB)
Title: Improvements in processes for producing intimate mixtures of substances, and for obtaining chemical products therefrom
IPC: B01F25/74
Filed: 1922-04-04
Abstract: Chemical reactions that are usually brought about only by long heating, agitation, or both, are effected rapidly and at lower temperatures by intimately mixing the interacting substances, with or without others, by passing them through a high-speed centrifugal pin disc mill of the horizontal disc type, in which a continuous stream of the substance is introduced at the centre and the mixture is discharged substantially all round the circumference.  The mill preferred is that described in Specification 186,462, [Class 86, Mixing &c.].  Examples are given of the production of hard soap, soft soap, dry soap powder, resin size, lubricants, edible oils by the removal of free fatty acids, disinfectants, caustic soda, and vulcanizing compositions and accelerators for the vulcanization of rubber.  Specifications 155,836, 171,084, [Class 91, Oils &c.] and 192,500 [Class 81 (i), Disinfecting &c.] are referred to.ALSO:Chemical reactions that are usually brought about only by long heating, agitation, or both, are effected rapidly and at lower temperatures by intimately mixing the interacting substances, with or without others, by passing them through a high-speed centrifugal pin disc mill of the horizontal disc type, in which a continuous stream of the substances is introduced at the centre and the mixture is discharged substantially all round the circumference.  The mill preferred is that described in Specification 186,462, [Class 59, Grinding, crushing, &c.]. Examples are given of the production of hard soap, soft soap, dry-soap powder, resin size, lubricants, and the purification of edible oils by the removal of free fatty acids. Soaps &c.-A hard soap is produced by twice running through the mill 6 parts of stearine and 4 parts of cocoanut oil at 82 DEG  C. with 1.5 parts of caustic soda dissolved in 11 parts of water.  A soft soap is produced by using 8 parts of olein and 2 parts of cottonseed oil at 82 DEG  C. with 11.5 parts of caustic potash of 38 DEG  Tw.  A dry-soap powder is produced by mixing 6 parts of palm kernel fatty acid with 7 parts of water at 50 DEG  C. and passing through the mill with 21 parts of soda ash.  Caustic soda may replace the soda ash if the water is reduced sufficiently.  A size is produced by grinding resin dry in the mill and running it through again with caustic-soda solution.  Fats and fatty oils, purifying.-Edible oils are produced by removing free fatty acids with practically no saponification of the glycerides by using soda ash, and only in very slight excess of that theoretically necessary.  224 parts of whale oil containing 10.3 per cent of acid are treated with a solution of 4.3 parts of soda ash in 28 parts of water.  Lubricants for machinery.-Stauffer and like greases are produced by saponifying fatty matter with the theoretical quantity of base and then running the soap and mineral oil through the mill, or by passing the base, fat and oil through the mill simultaneously.  An animal fat such as bone grease, a vegetable fat such as palm oil, stearine, or olein, or a mixture, are run through the mill with the theoretical quantity of lime and about 2 per cent of water or of caustic soda and about 5-7 per cent of water; 16-24 parts of the soap are mixed with 84-76 parts of mineral oil, passed through the mill, and then boiled for 15-30 minutes. Specifications 155,836, 171,084, and 192,500, [Class 81 (i), Disinfecting &c.], also are referred to.  Reference has been directed by the Comptroller to Specification 186,462, [Class 59, Grinding, crushing, &c.].ALSO:Chemical reactions that are usually brought about only by long heating, agitation, or both, are effected rapidly and at lower temperatures by intimately mixing the interacting substances, with or without others, by passing them through a high-speed centrifugal pin disc mill of the horizontal disc type in which a continuous stream of the substances is introduced at the centre and the mixture is discharged substantially all round the circumference.  The mill preferred is that described in Specification 186,462, [Class 59, Grinding. crushing, &c.].  In an example of the production of caustic soda, 6 parts of lime slaked with 10 parts of water and 10.5 parts of soda ash dissolved in 20 parts of water are passed through the mill at least twice, and the product filter-pressed or treated in a hydro-extractor.  The solution of caustic soda has a concentration of 20 per cent or above.  Reference has been directed by the Comptroller to Specification 186,462, [Class 59, Grinding, crushing, &c.].