SU129640A1 - The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon - Google Patents

The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon

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Publication number
SU129640A1
SU129640A1 SU640839A SU640839A SU129640A1 SU 129640 A1 SU129640 A1 SU 129640A1 SU 640839 A SU640839 A SU 640839A SU 640839 A SU640839 A SU 640839A SU 129640 A1 SU129640 A1 SU 129640A1
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SU
USSR - Soviet Union
Prior art keywords
sulfuric acid
purification
acid production
gases
roasting gases
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Application number
SU640839A
Other languages
Russian (ru)
Inventor
В.М. Богатырева
Е.В. Гербурт
А.С. Григорьева
Original Assignee
В.М. Богатырева
Е.В. Гербурт
А.С. Григорьева
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by В.М. Богатырева, Е.В. Гербурт, А.С. Григорьева filed Critical В.М. Богатырева
Priority to SU640839A priority Critical patent/SU129640A1/en
Application granted granted Critical
Publication of SU129640A1 publication Critical patent/SU129640A1/en

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Description

При обжиге колчедана, содержащего фтористые соединени , в присутствии вод ных паров и серного ангидрнда образуетс  фтористый водород, который в дальнейшем реагирует с силикатами, присутствующими в руде, в результате чего образуетс  четырехфтористый кремний. Четырехфтористый кремний  вл етс   дом по отношению к ванади вому катализатору, поэт-ому обжиговые газы контактного сернокислотного производства очишают от него.When roasting a pyrite containing fluorine compounds, hydrogen fluoride is formed in the presence of water vapor and sulfuric anhydride, which further reacts with the silicates present in the ore, resulting in the formation of silicon tetrafluoride. Silicon tetrafluoride is a home with respect to the vanadium catalyst, and therefore the burning gases of the contact sulfuric acid production are purified from it.

Способы очистки обжиговых газов от четырехфтористого кремни  путем промывки, например, водой, известны.Methods for cleaning roaster gases from silicon tetrafluoride by washing, for example, with water, are known.

Описываемый способ очистки обжиговых газов от четырехфтористого кремни   вл етс  более эффективным- Особенность способа состоит в том, что промывку производ т 5%-ной серной кислотой, содержащей растворенный сульфат кали  или натри , с последующим отстаиванием осадка и возвратом осветленной кислоты в циклВ лабораторных услови х способ осуществл ют следующим путемВ смесь воздуха с сернистым газом, содержащую - 10% SO, добавл ют газообразный SIF (концентрацией от 0,4 до 1 г/- 2 до содержани  0,5-1,0% SiF4 в газовой смеси. Смесь газов барботируют через вертикальную колонку с раствором K2SO4 в 5%-ной серной кислоте при 40°. Концентраци  раствора - 1-3% K2SO4. Объемна  скорость газов равн етс  - 4000 час . Из колонки газы пропускают через концентрированную серную кислоту и затем подают в контактную трубку, загруженную массой БАВ в количестве 11 мл или 6 г.The described method of purifying calcined gases from silicon tetrafluoride is more efficient. The peculiarity of the method is that the washing is performed with 5% sulfuric acid containing dissolved potassium or sodium sulfate, followed by settling of the precipitate and returning the clarified acid to laboratory conditions. The method is carried out in the following way. SIF gas (concentration from 0.4 to 1 g / -2) is added to a mixture of air with sulfur dioxide containing -10% SO to a content of 0.5-1.0% SiF4 in the gas mixture. bubbled through a vertical column with a solution of K2SO4 in 5% sulfuric acid at 40 ° C. The concentration of the solution is 1-3% K2SO4. The volumetric rate of gases is 4000 hours. From the column the gases are passed through concentrated sulfuric acid and then fed into a contact tube loaded weight of BAS in the amount of 11 ml or 6 g

При этом п;роисходит полна  очистка газа от четырехфтористого кремни - Количество поглощенного F превышает теоретически расчиЛ 12964-0At the same time, n; there is a complete purification of gas from silicon tetrafluoride - The amount of absorbed F exceeds theoretically calculated 12964-0

тайное- Активность контактной массы сохран етс  посто нной в нределах допустимых ошнбок анализа.secret- The activity of the contact mass is kept constant within the limits of permissible analysis error.

После отстаивани  осадка (KsSiFe + SiO2), которое продолжаетс  около /2 часа, осветленную кислоту возвращают в цикл. Содержание р2 в осветленной кислоте составл ет около 0,7-li%Предмет изобретени After settling the precipitate (KsSiFe + SiO2), which lasts for about 2 hours, the clarified acid is recycled. The content of p2 in the clarified acid is about 0.7-li%.

Способ очистки обжиговых газов контактного сернокислотного производства от четырсхфтористого кремни  путем промывки, отличающ и и с   тем, что, с целью повышени  эффективности очистки, промывку производ т 5%-ной серной кислотой, содержащей растворенный сульфат кали  или натри , с последующим отстаивапием осадка и возвратом осветленной кислоты в цикл.The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon by washing is distinguished by the fact that, in order to increase the cleaning efficiency, the washing is performed with 5% sulfuric acid containing dissolved potassium or sodium sulfate, followed by sedimentation of the precipitate and return clarified acid per cycle.

SU640839A 1959-10-10 1959-10-10 The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon SU129640A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU640839A SU129640A1 (en) 1959-10-10 1959-10-10 The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU640839A SU129640A1 (en) 1959-10-10 1959-10-10 The method of purification of roasting gases of contact sulfuric acid production from tetrafluoride silicon

Publications (1)

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SU129640A1 true SU129640A1 (en) 1959-11-30

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