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1. 发明专利

GB299835A Improvements in and relating to the manufacture of titanium oxide 未知
公开(公告)号：GB299835A
公开(公告)日：1928-11-02
申请号：GB2042227
申请日：1927-08-02
申请人： FRANCIS GEORGE COAD STEPHENS , LENNOX JAMES ANDERSON , WILLIAM ALAN CASH
IPC分类号： C09C1/00
摘要： 299,835. Stephens, F. G. C., Anderson, L. J., and Cash, W. A. Aug. 2. 1927. Pigments.-In the treatment of a titanium sulphate solution with a soluble alkaline earth salt solution, e.g. of barium chloride, the former is added gradually to a prepared bulk of the latter. Preferably the temperature is maintained at 25-40‹ C., say at 30-35‹ C., during precipitation of the alkaline earth sulphate, and is thereafter raised to and maintained at about 100‹ C. until substantially all the titanium in solution is precipitated. The conditions may be such that the particles of the composite precipitate are just sufficiently large to be filterable; for instance the one solution may contain 16 per cent of titanium dioxide as sulphate, and the other 100 parts of barium chloride to 750 parts of water. The filtered and washed precipitate may be suspended in water and have added thereto a small quantity of boric acid or a borate prior to calcination, in the manner described in Specification 273,017. Titanium sulphate for use in the process may be obtained from the ore by the process described in Specification 256,734, [Class 1 (iii), Oxides &c., Metallic], for instance, the finely ground ore may be mixed with water to form pulp or slurry which is agitated whilst there is added rapidly thereto the requisite quantity of oleum.

2. 发明专利

GB273017A Improvements relating to the production of titanium containing pigments 未知
公开(公告)号：GB273017A
公开(公告)日：1927-06-27
申请号：GB831726
申请日：1926-03-26
申请人： FRANCIS GEORGE COAD STEPHENS , LENNOX JAMES ANDERSON , WILLIAM ALAN CASH
IPC分类号： C09C1/00
摘要： 273,017. Stephens, F. G. C., Anderson, L. J., and Cash, W. A. March 26, 1926. Pigments.-A white titanium pigment is obtained by adding boric acid or a borate such as calcium or barium borate to titanium oxide admixed with or precipitated upon an alkaline earth sulphate, and heating the mixture. The pigment may be made by treating ilmenite with sulphuric acid, filtering, diluting, adding calcium or barium sulphate, and boiling to precipitate titanium oxide upon the sulphate. The precipitate is suspended in water and neutralized by a suitable base or carbonate such as calcium carbonate, and 2-4 per cent of boric acid or calcium or barium borate is added and intimately mixed by agitation or boiling or both. Alternatively the neutralization may be offected after' the addition of the boron compound. The mixed pigment is heated at 700-900‹ C. According to the Provisional Specification titanium oxide may be employed instead of titanium oxide associated' with alkaline earth sulphate.

3. 发明专利

GB309051A Improvements relating to the manufacture of titanium containing compounds 未知
公开(公告)号：GB309051A
公开(公告)日：1929-04-02
申请号：GB2595327
申请日：1927-10-01
申请人： FRANCIS GEORGE COAD STEPHENS , LENNOX JAMES ANDERSON , WILLIAM ALAN CASH
IPC分类号： C09C1/00 , C09C1/36
摘要： 309,051. Stephens, F. G. C., Andersost, L. J., and Cash, W. A. Oct. 1, 1927. Pigments.-Titanium salt solutions are liydrolyzed by adding the hot or cold salt solution to warm or boiling water to which has previously been added a colloid other than colloidal titanium oxide, for instance silicic acid. Solutions from which ferrous sulphate has, if necessary, been removed by crystallisation and containing about 5 per cent of titanous salts are preferably employed. To obtain composite pigments the solution may have an insoluble alkaline earth sulphate such as barium sulphate suspended therein; or a soluble barium salt solution may be added to a solution of titanium sulphate; or to a hydrolyzed solution of titanium sulphate, in which the titanium dioxide remains suspended, a solution of an alkaline earth salt may be added; or a sulphate solution of for instance sodium sulphate may be added and then one of an alkaline earth chloride; or the titanium dioxide obtained may be washed free from iron, mixed with an alkaline earth sulphate, neutralized, and calcined with or without the addition of a borate. In the last case the admixture of an alkaline earth sulphate may be omitted to obtain a pigment consisting substantially of titanium dioxide.

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