RU2468996C1 - METHOD OF OBTAINING K2TiF6 COMPOUND - Google Patents
METHOD OF OBTAINING K2TiF6 COMPOUND Download PDFInfo
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- RU2468996C1 RU2468996C1 RU2011139815/05A RU2011139815A RU2468996C1 RU 2468996 C1 RU2468996 C1 RU 2468996C1 RU 2011139815/05 A RU2011139815/05 A RU 2011139815/05A RU 2011139815 A RU2011139815 A RU 2011139815A RU 2468996 C1 RU2468996 C1 RU 2468996C1
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- titanium dioxide
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Изобретение относится к неорганической химии редких металлов, в частности к неорганической химии титана.The invention relates to inorganic chemistry of rare metals, in particular to inorganic chemistry of titanium.
Соединение K2TiF6 используют при переплавке алюминия и его сплавов для получения слитков с более тонкой структурой зерен и лучшими механическими свойствами, а также для получения лигатур Al-Ti и Al-Ti-B.The compound K 2 TiF 6 is used in the remelting of aluminum and its alloys to obtain ingots with a finer grain structure and better mechanical properties, as well as to obtain Al-Ti and Al-Ti-B alloys.
Известен способ получения соединения К3TiF6 взаимодействием солей калия с титанофтористоводородными кислотами, которые могут быть получены растворением диоксида титана во фтороводородной кислоте (Химическая энциклопедия. М.: Науч. Издат. «Большая Российская энциклопедия», т.4, 1995 г.). Недостатки данного метода - двухстадийная схема получения комплексного фторида, а также использование токсичного реагента (плавиковой кислоты). Этот способ принят за прототип.There is a method of producing compounds K 3 TiF 6 by the interaction of potassium salts with hydrofluoric acids, which can be obtained by dissolving titanium dioxide in hydrofluoric acid (Chemical Encyclopedia. M .: Scientific Publishing House "Big Russian Encyclopedia", v.4, 1995) . The disadvantages of this method are the two-stage scheme for producing complex fluoride, as well as the use of a toxic reagent (hydrofluoric acid). This method is adopted as a prototype.
С целью упрощения разработан способ получения соединения K2TiF6, включающий взаимодействие между диоксидом титана (или гидратированным диоксидом титана TiO2·nH2O) и фторсодержащим реагентом (раствором гидродифторида калия) при нагревании. К обязательным условиям осуществления способа относятся: использование в реакции синтеза непрокаленных оксидов титана (температура сушки 200-300ºС) и промывка продукта водой. Предлагаемый способ позволяет получить комплексный фторид титана за одну операцию, исключить применение плавиковой кислоты, а также использовать раствор KHF2 в обороте.To simplify, a method has been developed for the preparation of compound K 2 TiF 6 , comprising the interaction between titanium dioxide (or hydrated titanium dioxide TiO 2 · nH 2 O) and a fluorine-containing reagent (potassium hydrodifluoride solution) by heating. Mandatory conditions for the implementation of the method include: use in the synthesis reaction of non-calcined titanium oxides (drying temperature 200-300 ° C) and washing the product with water. The proposed method allows to obtain complex titanium fluoride in one operation, to exclude the use of hydrofluoric acid, and also to use a solution of KHF 2 in circulation.
Пример 1. К 10%-ному раствору KHF2 объемом 100 мл добавили при перемешивании 2 г гидратированного диоксида титана (влажность 66,8%) и нагревали до температуры кипения. Раствор охладили до комнатной температуры. Выпавшие после охлаждения кристаллы отфильтровали, промыли дистиллированной водой при массовом соотношении жидкой и твердой фаз 1:1 и просушили при температуре 100-110ºС.Example 1. To a 10% 100 ml KHF 2 solution, 2 g of hydrated titanium dioxide (humidity 66.8%) was added with stirring and heated to boiling point. The solution was cooled to room temperature. The crystals precipitated after cooling were filtered off, washed with distilled water at a mass ratio of liquid and solid phases of 1: 1, and dried at a temperature of 100-110 ° C.
Продуктом, по данным рентгенофазового анализа (РФА), являлось соединение состава K2TiF6.The product, according to x-ray phase analysis (XRD), was a compound of composition K 2 TiF 6 .
Пример 2. К 10%-ному раствору KHF2 объемом 50 мл добавили при перемешивании 1 г просушенного при 300ºС диоксида титана и нагревали до температуры кипения. После растворения TiO2 раствор охладили до комнатной температуры. Выпавшие после охлаждения кристаллы отфильтровали, промыли дистиллированной водой при массовом соотношении жидкой и твердой фаз 1 мл/г, просушили при температуре 100-110ºС. Продуктом, по данным РФА, являлось соединение состава K2TiF6.Example 2. To a 10% solution of KHF 2 with a volume of 50 ml, 1 g of titanium dioxide dried at 300 ° C was added with stirring and heated to boiling point. After dissolution of TiO 2, the solution was cooled to room temperature. The crystals precipitated after cooling were filtered off, washed with distilled water at a mass ratio of liquid and solid phases of 1 ml / g, and dried at a temperature of 100-110 ° C. The product, according to the XRD, was a compound of the composition K 2 TiF 6 .
Пример 3. Эксперимент проводили, как в примере 2, но использовали раствор гидродифторида калия с концентрацией 15%. Продуктом, по данным РФА, являлось соединение состава K2TiF6.Example 3. The experiment was carried out as in example 2, but used a solution of potassium hydrodifluoride with a concentration of 15%. The product, according to the XRD, was a compound of the composition K 2 TiF 6 .
Пример 4. Эксперимент проводили, как в примере 2, но полученный осадок не промывали водой. Продукт, по данным РФА, состоял из смеси соединения состава K2TiF6 (89%) и гидродифторида калия.Example 4. The experiment was carried out as in example 2, but the resulting precipitate was not washed with water. The product, according to XRD, consisted of a mixture of a compound of composition K 2 TiF 6 (89%) and potassium hydrodifluoride.
Пример 5. Эксперимент проводили, как в примере 3, но полученный осадок не промывали водой. Продуктом, по данным РФА, являлось соединение состава K2TiF6·KHF2.Example 5. The experiment was carried out as in example 3, but the resulting precipitate was not washed with water. The product, according to the XRD, was a compound of the composition K 2 TiF 6 · KHF 2 .
Пример 4. Эксперимент проводили, как в примере 2, но использовали диоксид титана, прокаленный при 800ºС. Реакция не протекала.Example 4. The experiment was carried out as in example 2, but used titanium dioxide, calcined at 800 ° C. The reaction did not proceed.
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Cited By (2)
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CN103290427A (en) * | 2013-06-14 | 2013-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing potassium fluotitanate |
CN105668621A (en) * | 2016-01-15 | 2016-06-15 | 江苏新泰材料科技股份有限公司 | Method for preparing potassium fluotitanate from fluorine-containing wastewater |
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GB725747A (en) * | 1952-06-10 | 1955-03-09 | Horizons Titanium Corp | Production of alkali metal fluotitanates |
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SU831730A1 (en) * | 1979-07-04 | 1981-05-23 | Предприятие П/Я В-8469 | Method of producing rotassium hexafluorotitanate |
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WO2010139902A1 (en) * | 2009-06-05 | 2010-12-09 | Airbus Operations (S.A.S) | Method for regenerating a solution used for pickling or chemically milling titanium |
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