SU149405A1 - The method of purification of concentrated sulfuric acid from nitrogen oxides - Google Patents

The method of purification of concentrated sulfuric acid from nitrogen oxides

Info

Publication number
SU149405A1
SU149405A1 SU746320A SU746320A SU149405A1 SU 149405 A1 SU149405 A1 SU 149405A1 SU 746320 A SU746320 A SU 746320A SU 746320 A SU746320 A SU 746320A SU 149405 A1 SU149405 A1 SU 149405A1
Authority
SU
USSR - Soviet Union
Prior art keywords
acid
purification
nitrogen oxides
sulfuric acid
concentrated sulfuric
Prior art date
Application number
SU746320A
Other languages
Russian (ru)
Inventor
Н.М. Антонова
А.И. Баранова
Original Assignee
Н.М. Антонова
А.И. Баранова
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.)
Filing date
Publication date
Application filed by Н.М. Антонова, А.И. Баранова filed Critical Н.М. Антонова
Priority to SU746320A priority Critical patent/SU149405A1/en
Application granted granted Critical
Publication of SU149405A1 publication Critical patent/SU149405A1/en

Links

Landscapes

  • Treating Waste Gases (AREA)

Description

Известен способ очистки коипентрирозаниой серной кнслоты (выше lOo/0-ной) от окислов азота гидразином (КЧН4 ).A known method of purification of coententrosia sulfuric acid (above lOo / 0-th) from nitrogen oxides with hydrazine (KCHN4).

Предлагаемый способ очистки концентрировапной серной кислоты от окислов азота с 1П5имснениел; восстановител  отлнчастс5 тем. что, с целью его удешевлени , в качестве восстановител  используют водный -Юо/о-ный раствор формалина.The proposed method of purification of concentrated sulfuric acid from nitrogen oxides with 1P5 imneniel; restorer otlnchasts5 topics. that, in order to reduce its cost, an aqueous-Uo / O formal solution is used as a reducing agent.

Дл  осупдествлени  способа очистки необходимы следующие оитпмальные услови : колр чество прибавл емого реагента 0..5о/о от веса кислоты при содержании .20з 0,06-0,5о/о, температура обработки 110°, продолжительность обработки 2 -юс.To clarify the purification process, the following optimal conditions are necessary: the amount of the added reagent is 0..5 o / o of the weight of the acid at a content of.

Выделение окислов азота из серной кислоты может быть проведено в цехах ее получени , в отделении конденсации без проведени  каких-либо дополнительных монтажных работ. Конденсаци  паров HgSO,;, получаемых из сероводорода, как известно, осуи,ествл етс  в скрубберной башне, орошаемой кислотой, а также в электрофи;1ьтре. Формалин следчет прибавл ть в сборник кислоты, откуда он вместе с кислотой направл етс  на орошепие башни. В башне при небольшом снижении плотности орон1ени  темпег/атуру кислоты поднимают с обычных 90 до 100- 10°.Isolation of nitrogen oxides from sulfuric acid can be carried out in the workshops for its preparation, in the condensation section without any additional installation work. Condensation of HgSO,; vapor, derived from hydrogen sulphide, as is known, is carried out in a scrubber tower irrigated with acid, as well as in an electrofi e; Formalin should be added to the acid reservoir, from where it, together with the acid, is directed to the tower’s irrigation system. In the tower, with a small decrease in the density of oron1, the acid / ature of acid is raised from the usual 90 to 100-10 °.

Пример. На 100 вес. ч. крепкой серной кислоты, содержащей 0,06э/о N20:5, прибавл ют 0,09 вес. ч. СНОН в виде 40 /о-ного водного раствора формалина.Example. 100 weight. 0.09 wt.% of strong sulfuric acid containing 0.06 e / o N20: 5 was added. h. SNON in the form of a 40 / o-aqueous formalin solution.

На чертеже изображена схема конденсационного отделени  цеха мокрого катализа с очисткой кислоты от окислов азота формалпном.The drawing shows a diagram of the condensation separation of a wet catalysis workshop with the purification of the acid from nitrogen oxides with formalphenol.

Процесс осуществл ют на имеющейс  аппаратуре, состо щей из скрубберной бащни 1, орощаемой кислотой, сборника кислоты 2, иасоса 5 и холодильника 4. Вновь устанавливаетс  бачок 5 дл  раствора формалина .The process is carried out on an existing apparatus consisting of a scrubber tank 1, an irrigated acid, an acid collector 2, an pump 5 and a cooler 4. The tank 5 for the formalin solution is re-installed.

Очистку кислоты от окислов азота провод т одновременно с конденсацией кислоты в скруб-берной бащне. Раствор формалина из бачка 3 непрерывно или периодически поступает в сборник, заполненный: стекающей с бащни кислотой.The purification of the acid from nitrogen oxides is carried out simultaneously with the condensation of the acid in a scrubbing barn. Formalin solution from the tank 3 continuously or periodically enters the collection filled with: acid flowing down from the base.

Орошающа  бёшню кислота захватывает конденсирующиес  пары H2S04 вместе с окислами азота. Последние реагируют с формалином, а выдел ющиес  газы - продукгы реакции - унос тс  газовой смесью. Температ Т у:к:ислоты на выходе из бащни поддерживают равной 110° за счет снижени  на 20о/о обычных количеств орошающей кислоты . На входе в холодильник гор чую кислоту разбавл ют некоторым количеством ретурной кислоты. В получаемой серной кислоте окислов азота остаетс  менее чем %.The irrigating water acid captures the condensable H2S04 fumes along with oxides of nitrogen. The latter react with formalin, and the evolved gases — the reaction products — are carried away by the gas mixture. The temperature T y: q: the acid at the exit of the bats is maintained at 110 ° by reducing by 20 o / o the usual amounts of irrigating acid. At the entrance to the refrigerator, the hot acid is diluted with some retour acid. In the resulting sulfuric acid, nitrogen oxides remain less than%.

Предмет изобретени Subject invention

Способ очистки концентрированной серной кислоты от окислов азота с применением восстановител , отличающийс  тем, что, с целью его удещевлени , в качестве восстановител  примен ют водный 400/о-ный раствор формалина.The method of purification of concentrated sulfuric acid from nitrogen oxides using a reducing agent, characterized in that, with the aim of reducing it, an aqueous 400 / o-formalin solution is used as a reducing agent.

SU746320A 1961-10-04 1961-10-04 The method of purification of concentrated sulfuric acid from nitrogen oxides SU149405A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU746320A SU149405A1 (en) 1961-10-04 1961-10-04 The method of purification of concentrated sulfuric acid from nitrogen oxides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU746320A SU149405A1 (en) 1961-10-04 1961-10-04 The method of purification of concentrated sulfuric acid from nitrogen oxides

Publications (1)

Publication Number Publication Date
SU149405A1 true SU149405A1 (en) 1961-11-30

Family

ID=48304534

Family Applications (1)

Application Number Title Priority Date Filing Date
SU746320A SU149405A1 (en) 1961-10-04 1961-10-04 The method of purification of concentrated sulfuric acid from nitrogen oxides

Country Status (1)

Country Link
SU (1) SU149405A1 (en)

Similar Documents

Publication Publication Date Title
ATE102848T1 (en) PROCESS FOR DENOXIFICATION OF EXHAUST GASES WITH PRODUCTION OF HNO3.
US4137294A (en) Process of scrubbing fuel synthesis gases to remove acid gases and organic sulfur compounds
ES303011A1 (en) Process for obtaining sulfuric acid
US4474740A (en) Method for regenerating physically acting organic scrubbing agents
SU149405A1 (en) The method of purification of concentrated sulfuric acid from nitrogen oxides
DE2037619B2 (en) PROCESS FOR CLEAVING SULFURIC ACID
IL25597A (en) Elimination of acrolein from acrylonitrile
GB434302A (en) Improvements in or relating to the absorption of nitrogen oxides
GB1026946A (en) Process for extracting oxides of nitrogen
GB820437A (en) Recovery of ammonia and hydrogen cyanide
US3917798A (en) SO{HD 2{B abatement
US2086731A (en) Recovery of hydrocyanic acid
JPS5333975A (en) Lowering method for concentration of nitrogen monoxide in exhaust gas
SU1729277A3 (en) Method of nitrogen oxides removal from excreted gases
JPS5352274A (en) Treating method for aqueous solution containing urea, ammonia and carbondioxide
EP0468353B1 (en) Process for avoiding wastewater in hexamine production
SU146293A1 (en) The method of obtaining smoke mixture C-IV
GB881532A (en) Improvements in or relating to the recovery of hydrogen fluoride from its azeotrope with water
GB852073A (en) Improvements in or relating to the production of sulphuric acid
SU916380A1 (en) Method of recovering bromine from bromine-air mixture
SU129646A1 (en) The method of obtaining strong nitric acid direct synthesis
GB808234A (en) Improvements in or relating to processes for the manufacture of nitric acid by catalytic combustion of ammonia
Bair et al. Identification of Alcohols and Alkyl Hydrogen Sulfates with S-Benzylthiuronium Chloride
SU48247A1 (en) Method for producing sulfuric acid by oxidizing sulfur dioxide with nitrogen oxides
RU2042610C1 (en) Method of synthesis of sulfuric acid by nitrosous method