SU352830A1 - Method of oxidation of sulfuric anhydride - Google Patents

Method of oxidation of sulfuric anhydride

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Publication number
SU352830A1
SU352830A1 SU1476002A SU1476002A SU352830A1 SU 352830 A1 SU352830 A1 SU 352830A1 SU 1476002 A SU1476002 A SU 1476002A SU 1476002 A SU1476002 A SU 1476002A SU 352830 A1 SU352830 A1 SU 352830A1
Authority
SU
USSR - Soviet Union
Prior art keywords
oxidation
catalyst
sulfuric anhydride
contact
layer
Prior art date
Application number
SU1476002A
Other languages
Russian (ru)
Original Assignee
А. Г. Амелин, Б. Борода това, В. М. Перфильев , Е. В. Яшке
Publication of SU352830A1 publication Critical patent/SU352830A1/en

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Description

Изобретение относитс  к способам каталитического окислени  сернистого ангидрида.This invention relates to methods for the catalytic oxidation of sulfur dioxide.

Дл  предохранени  «онтактной массы ог отравлени  фтористыми соединени ми в известной схеме производства осуществл ют промывку газа разбавленной серной кислотой . Однако при повышенном содержании фтора в сырье наблюдаетс  лроскок фтористых соединений через промывное отделение и попадание их на катализатор. При этом при взаимодействии SiF с па1рами воды образуетс  SiO2, который покрывает поверхность гранул катализатора и делает его неактивным .In order to protect the ontact mass of the poisoning agent with fluoride in the known production scheme, the gas is washed with dilute sulfuric acid. However, with an increased content of fluorine in the raw material, very low levels of fluoride compounds are observed through the washing compartment and their contact with the catalyst. In this case, when SiF interacts with water vapor, SiO2 is formed, which covers the surface of the catalyst granules and makes it inactive.

При получении серной кислоты по системе СО по схеме двойного контактировани  отравление катализатора происходит во второй стадии контактировани .When sulfuric acid is produced by the CO system according to the double-contact scheme, the poisoning of the catalyst occurs in the second stage of contact.

Дл  предотвращени  отравлени  катализатора фтористыми соединени ми предлагаетс  газ предварительно пропускать через слой пористого материала (отработанную контактную массу, пемзу, силикагель, диатомит и др.) при температуре 400-500°С.To prevent catalyst poisoning by fluoride compounds, it is proposed to pre-pass gas through a layer of porous material (waste contact mass, pumice stone, silica gel, diatomite, etc.) at a temperature of 400-500 ° C.

Пример. Газ с содержанием 2,5% SO2Example. Gas with 2.5% SO2 content

подогревают до температуры и подают в две стальные контактные колонки, загруженные гранулированной контактной массой БАВ в следующих количествах; перва  колонка-два сло  по 66 втора  колонка- один слой 133 см. Опытна  установка работает в течение 81 суток при среднем содержани фтора в газе 30 мг/мм и скорости подаваемого газа 30 лмин. За врем  опыта вheated to temperature and served in two steel contact columns loaded with granular contact mass of biologically active substances in the following quantities; The first column is two layers, 66 are in the second column; one layer is 133 cm. The test installation works for 81 days with an average fluorine content in the gas of 30 mg / mm and the feed gas velocity of 30 lmin. During the experience in

колонку поступает 104,8 г фтора.the column receives 104.8 g of fluorine.

В контактной колонке с 2 мл сло ми массы (т. е. с защитным слоем катализатора) снижение активности массы второго сло  не наблюдаетс , а в колонке с одним слоем катализатора активность задаете 79,6 до 46,1%.In the contact column with 2 ml mass layers (i.e., with a protective catalyst layer), no decrease in the mass activity of the second layer is observed, and in a column with a single catalyst layer, the activity is set to 79.6 to 46.1%.

Предмет изобретени Subject invention

Способ окислени  сернистого ангидрида в присутствии катализатора при повыщенной температуре, отвечающийс  тем, что, с целью предотвращени  отравлени  катализатора фтористыми соединени ми, газ предварительно пропускают через слой пористого материала при температуре 400-500°С.The method of oxidation of sulfur dioxide in the presence of a catalyst at an elevated temperature, is responsible for the fact that, in order to prevent catalyst poisoning by fluoride compounds, the gas is preliminarily passed through a layer of porous material at a temperature of 400-500 ° C.

SU1476002A Method of oxidation of sulfuric anhydride SU352830A1 (en)

Publications (1)

Publication Number Publication Date
SU352830A1 true SU352830A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324499A (en) * 1990-11-30 1994-06-28 Chemetics International Co. Ltd. Fluoride removal from sulphuric acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324499A (en) * 1990-11-30 1994-06-28 Chemetics International Co. Ltd. Fluoride removal from sulphuric acid

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