Patent GB-468684-A (GB)
Title: Improvements in and relating to the treatment of flour and the manufacture of means therefor
IPC: A21D2/02
Filed: 1935-12-04
Abstract: Flour, milling products, and the like are treated with nitrogen trichloride which is manufactured electrolytically and concurrently with the manufacture is added to the material to be treated, the production of the nitrogen trichloride being concurrently controlled so that the dosage of the materials can be controlled as required by said materials from time to time.  The nitrogen chloride is prepared preferably by the electrolysis of an ammonium chloride solution, the pH value of which is preferably kept below 4,4 by the addition of hydrochloric, phosphoric or sulphuric acid.  Other materials may be used for the electrolysis, such as ammonium sulphate and hydrochloric acid or ammonia and excess of hydrochloric acid or ammonia and mixtures of hydrochloric and sulphuric acids.  To carry the nitrogen chloride to the flour-treating chamber, air is blown through the electrolyzed mixture or the pressure above the liquid is reduced or both methods are employed.  The electrolyzed liquid itself may be used.  The nitrogen trichloride need not be purified as the flour may be treated by the mixture of gases produced by the electrolysis.  The electrolysis is preferably carried out in high, relatively narrow cells which may be of ebonite or acid proof stoneware and as electrodes dense graphite bars are used; the cathodes may be wrapped round with asbestos rope; platinum or magnetic oxide of iron may also be used as electrodes.  The dosage of the nitrogen chloride is controlled by regulating the electrolyzing current and means such as a manometer or a constant speed indicator or similar device may be used to control the current automatically in the event of any disturbance in the continuity of the treatment of the material.  The Specification as open to inspection under Sect. 91 comprises also the treatment of flour &c. with mono or dichloramine produced by the electrolysis of acidified solutions of ammonium chloride, the degree of acidity of the solution controlling the production in the greatest proportion of mono or dichloramine or of nitrogen trichloride; by varying the pH value in separate electrolyzing cells mixtures of desired character may be produced.  This subject-matter does not appear in the Specification as accepted.ALSO:Flour, milling products and the like are treated with nitrogen trichloride which is manufactured electrolytically and concurrently with the manufacture is added to the material to be treated the production of the nitrogen trichloride being concurrently controlled so that the dosage of the materials can be controlled as required by said materials from time to time.  To carry the nitrogen trichloride to the treating chambers air is blown through the electrolyzed mixture or the pressure above the liquid is reduced or both methods may be combined.  The electrolyzed liquid itself may be used.  The nitrogen trichloride need not be purified as the flour may be treated with the mixture of gases produced by the electrolysis.  The dosage is controlled by regulating the electrolyzing current and means such as a manometer or a constant speed indicator or similar device may be used to control the current automatically in the event of any disturbance in the continuity of the treatment of the material.  The Specification as open to inspection under Sect. 91, comprises also the treatment of flour &c. with mono- or dichloramine produced electrolytically.  This subject-matter does not appear in the Specification as accepted.