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以往我厂试验室测定钛铁中的钛,采用锌铝等作还元剂容量法,手续繁杂,时间也较长,一般需2～3小时。最近试验将钛铁用稀硫酸溶解,反应如下; 2TiFe+5H_2SO_4→Ti_2(SO_4)_3+2FeSO_4+5H_2↑并预先在锥形瓶中加固体碳酸钠和加盖还原器(在还原器内预先盛有饱和无水碳酸钠),以防止三价钛被空气氧化,然后将生成的三价钛盐溶液用硫酸高铁铵滴定Fe~(+3)+Ti~(+3)→Ti~(+4)+Fe~(+2),以硫氰酸铵作指示剂滴定至褐红色为终点。
In the past, I plant titanium determination of titanium in the test, the use of zinc and aluminum as a catalyst capacity method, procedures complicated, time is longer, usually takes 2 to 3 hours. The recent test will ilmenite dissolved with dilute sulfuric acid, the reaction is as follows; 2TiFe + 5H_2SO_4 → Ti_2 (SO_4) _3 +2 FeSO_4 + 5H_2 ↑ and preconditioned in a conical flask with sodium carbonate and capping reducer (in the reducer pre-Sheng There is saturated anhydrous sodium carbonate) to prevent the trivalent titanium from being oxidized by the air, and then the resulting trivalent titanium salt solution is titrated with Fe ~ (+3) + Ti ~ (+3) → Ti ~ (+4 ) + Fe ~ (+2), titration with ammonium thiocyanate as indicator to maroon endpoint.