SU865773A1

SU865773A1 - Method of producing chlorine and calcium chloride

Info

Publication number: SU865773A1
Application number: SU802868368A
Authority: SU
Inventors: Михаил Иванович Гнатюк; Альбина Васильевна Илларионова; Николай Васильевич Хабер; Владимир Георгиевич Овчаренко
Original assignee: Предприятие П/Я Р-6751
Priority date: 1980-01-10
Filing date: 1980-01-10
Publication date: 1981-09-23

Description

(54) СПОСОБ ПОЛУЧЕНИЯ ХЛОРА И ХЛОРИСТОГО КАЛЬЦИЯ(54) METHOD FOR PRODUCING CHLORINE AND CHLORIDE CALCIUM

Изобрете11ие относитс к производству хлора и хлористого кальци и может быть использовано в химической промышленности при производстве 5 хлорпродуктов и при хлоркальциевой очистке растворов от сульфатов.The invention relates to the production of chlorine and calcium chloride and can be used in the chemical industry in the production of 5 chlorine products and in calcium chloride purification of sulphate solutions.

Известен способ получени хлора и хлористого кальци путем обработки 10%-ной сол ной кислотой раствора, Ю содержащего 80-100 г/л гипохлорита кальци . После отдувки хлора воздухом из водной фазы потГучсиот газ.ообраэный хлор с выходом 52-56% и хлористый кальций l ..15A method of producing chlorine and calcium chloride is known by treating with a 10% hydrochloric acid solution containing 10 to 80 g / l calcium hypochlorite. After blowing off chlorine from the aqueous phase, the chlorine is collected from the aqueous phase with a yield of 52-56% and calcium chloride l ..15

Недостатками этого способа вл ютс низкий выход хлора и применение 10%-ной сол ной кислоты, что ведет к разбгвлению раствора хлористого кальци .20The disadvantages of this method are low chlorine yield and the use of 10% hydrochloric acid, which leads to dissolution of calcium chloride solution. 20

Наиболее близким к изобретению по технической сущности и достигаемому эффекту вл етс способ получени хлора и хлористого кальци путем обработки сол ной кислотой раствора 25 гипохлорида кальци с последунвдей отдувкой хлора из водной фазы хлорсодержащим газом с содержанием хлора 50-70%. При этом выход хлора составл ет 87% 2.30The closest to the invention in its technical essence and the achieved effect is a method for producing chlorine and calcium chloride by treating with hydrochloric acid a solution of calcium hypochloride solution 25 followed by stripping chlorine from the aqueous phase with chlorine-containing gas with 50-70% chlorine. The yield of chlorine is 87% 2.30

Однако известный способ не позвол ет получить выход хлора илше 90%. Кроме того, в результате применени 30-32%-ной сол ной кислоты концентраци образующегос хлористого кальци не превышает 19%, что ведет к необходимости дополнительной выпарки раствора .However, the known method does not allow to obtain a yield of chlorine or more than 90%. In addition, as a result of the use of 30-32% hydrochloric acid, the concentration of calcium chloride formed does not exceed 19%, which leads to the need for additional evaporation of the solution.

Цель изобретени - увеличение выхода хлора и концентрации хлористого кальци .The purpose of the invention is to increase the yield of chlorine and the concentration of calcium chloride.

Поставленна цель достигаетс тем, что обработку раствора гипохлорита кальци осуществл ют хлористым водородом при 60-80 С с наложением пульсаций частотой 60-300 последующей отдувкой хлора из водной фазы.This goal is achieved in that the treatment of the calcium hypochlorite solution is carried out with hydrogen chloride at 60-80 ° C with the imposition of pulsations at a frequency of 60-300 followed by the blowing off of chlorine from the aqueous phase.

При уменьшении т астоты пульсации ниже 60 мин наблюдаетс проскок хлористого водорода через колонну, а увеличение частоты выше 300 приводит к непроизводительным затратам энергии.When the pulsation frequency decreases below 60 minutes, hydrogen chloride leaks through the column, and an increase in the frequency above 300 leads to wasteful energy.

Способ осуществл етс следующим образом.The method is carried out as follows.

Claims

Calcium hypochlorite solution and hydrogen chloride are fed to the bottom of the pulsation column with a height of 5 m and a diameter of 80 mm. The column is equipped with contact plates with a free section of 42%, the distance between the plates is 150 mm. Inside the column, the temperature of the bo-bo C and vacuum mm of water column are maintained. In order to improve the mass transfer and eliminate the leakage of hydrogen chloride through the column, pulsations are imposed on the suspension. After the column, the gas phase containing chlorine and chlorine dioxide is passed through a heat exchanger where chlorine dioxide decomposition occurs. The aqueous phase is stripped with air to remove chlorine. Example 1. A solution of calcium hypochloride containing g / l: Ca (OC)) a 40; CaCl-ji 160, Ca (0) -20, and Ca (C10j) i 10, at a flow rate of 0.2 m / h, are treated in a pulsation column with hydrogen chloride at a flow rate of 12.6. , at the same time pulsations with a frequency of 60 with an amplitude of 80 mm are applied to the suspension. The gas phase is passed through a heat exchanger, where at 120-125 ° С chlorine dioxide is decomposed into chlorine and oxygen. Water phase from pulsation. After stripping chlorine and separating solid impurities, the column contains 24% calcium chloride. The yield of chlorine to the gas phase is 95%. Example 2. A solution of calcium hypochlorite containing, g / l: Ca (OOC 120; CaCl1. 160, Ca (C10: j) i 3 and Ca (OH 20, is treated with hydrogen chloride in a pulsating a column. The consumption of a solution of hypochloride is 0.2, hydrogen chloride is 22, 0. A pulsation at a frequency of 300 minutes and an amplitude of 20 mm is applied to the suspension. The output of hydrogen chloride to the gas phase is 97% j Comparative data The proposed and known methods are shown in Table 1. Suggested Known 85-90 12-19 invention It allows to increase the chlorine yield by 5-12%, the concentration of calcium chloride by 5-20%, and also to intensify the process by 2-3 times. Formula of the invention Method of obtaining chlorine and calcium chloride by acid treatment of calcium hypochlorite solution at 60-80 ° C followed by stripping chlorine from the aqueous phase, characterized in that, in order to increase the concentration of calcium chloride and chlorine release, hypochlorite is treated with hydrogen chloride when pulsations are applied with a frequency of 60-300. Sources of information taken into account in the examination 1. The author's certificate of the USSR 253779, cl. From 01 to 7/02, 1968.

2. Authors certificate of the USSR 627081, cl. C 01 B 7/02, 1979.