SU865381A1

SU865381A1 - Sorbent producing method

Info

Publication number: SU865381A1
Application number: SU802877628A
Authority: SU
Inventors: Александра Антоновна Кораблева; Галина Михайловна Фишман
Original assignee: Ленинградский Институт Авиационного Приборостроения
Priority date: 1980-01-29
Filing date: 1980-01-29
Publication date: 1981-09-23

Description

(54) СПОСОБ ПОЛУЧЕНИЯ СОРБЕНТА(54) METHOD FOR OBTAINING SORBENT

1one

Изобретение относитс к способу получени сорбента на основе слабоосновных гвдратов окислов металлов и может быть использовано дл создани регенерируемых поглотителей двуокиси углерода из влажной атмосферы герметичных объемов, например дл создани защитной атмосферы в холодильных камерах овощехранилищ с регулируемой газовой средой, в машиностроительной и металлургической промы-.. шленност х дл очистки экзотермической атмосферы от двуокиси углерода и в других област х техники, где требуетс об-, ратимое поглощение газообразных веществ, обладающих слабокислотным характером. jjThe invention relates to a method for producing a sorbent based on weakly basic gvdratov metal oxides and can be used to create regenerable carbon dioxide absorbers from a humid atmosphere of sealed volumes, for example, to create a protective atmosphere in refrigerators of vegetable stores with adjustable gaseous medium, in engineering and metallurgical industry. cleansing the exothermic atmosphere from carbon dioxide and in other areas of the technology where a reasonable, gaseous absorption is required substances having a weakly acidic character. jj

Известен способ получени регенерируемого поглотител двуокиси углерода путем взаимодействи насыщени раствор ж солк трехвалентного железа и щелочи pLj.A known method for producing a regenerable carbon dioxide absorber by reacting saturation of a solution of ferric iron and alkali pLj.

Недостатком способа вл етс получе- jg ние поглотител с невысокой сорбционнсЛ активностью по двуокиси углерода.The disadvantage of this method is to obtain a scavenger with a low sorption activity for carbon dioxide.

Наиболее близким к предлагаемому по технической сущности и достигаемому результату вл етс способ получени гид- , ратировашюй двуокиси циркони путем взаимодействи 3-4 н раствора азотнокислого циркони с 8-2 О н раствором едкого натра, отделени осадка от маточного раствора и его сушки при 5О-бО С с последующей обработкой полученного продукта раствором щелочи, отмывкой и сущкой при комнатной температуре f2.The closest to the proposed technical essence and the achieved result is a method of obtaining hydrochloric zirconia by reacting a 3-4 N solution of zirconium nitrate with 8-2 O n sodium hydroxide solution, separating the precipitate from the mother liquor and drying it at 5O- Б С С followed by treatment of the obtained product with alkali solution, washing and substance at room temperature f2.

Недостаток известного способа состоит , в том, что полученный таким способом сорбент имеет сравнительно небольщую удельную поверхность, относительно йевЫ сокую сорбционную активность по двуокиси углерода.The disadvantage of this method is that the sorbent obtained in this way has a relatively small specific surface area, relatively low sorption activity on carbon dioxide.

Цепь изобретени - увеличение удель ной поверхности сорбента и его, сорбционной акткюности по двуокиси углерода.The circuit of the invention is an increase in the specific surface of the sorbent and its sorption activity on carbon dioxide.

Claims

The goal is achieved by the fact that according to the method of obtaining a sorbent by precipitating hydrous metal oxide by reacting 3-A n solutions of metal nitrates with concentrated alkaline solutions, separating the precipitate from the mother liquor and drying it with a subsequent alkali solution, precipitating is carried out from solutions containing nitrates iron and zirconyl at a ratio of 1: 1, and drying the precipitate is carried out at 85-95 ° C. According to the proposed method, the mixture of nitrate solutions is precipitated trehvgshvntnogo iron and zirconium produces kompozmdii consisting of ferric hydroxides yir horses. A ratio of nitrates of 1: 1 is the most optimal, since it produces a sorbent with the highest specific surface area and the highest sorption activity for carbon dioxide. The optimum drying temperature is 85–95 ° C. At a higher temperature (higher), sintering of particles occurs, leading to a decrease in the specific surface area and sorption activity of carbon dioxide. At lower temperatures (50 ° C), the increase in specific surface area and carbon dioxide sorption capacity is less than at. Example. 5OO ml 4 and a solution of zirconium nitrate is mixed with 5OO ml of 4 n ferric nitrate solution. The resulting solution was introduced into 400 KO 13.7N ammonia solution with stirring. The suspension is transferred to the suction filter and separated from the mother liquor, dried for 8 hours at 85-9 ° C. The dried precipitate is treated with 1OO ml of 13.7N ammonia solution, washed on bo-nitrate, dried in air at room temperature. The sample obtained is a toto: single powder (of a powder type) with a specific surface of 51O and sorption activity on carbon dioxide. 6O mg / g at a pressure of 40 mm Hg SOL. The sorbent obtained by a known method has a specific surface area of 36O and sorption activity on carbon dioxide 40 mg / g. Thus, the proposed method. allows to obtain a sorbent with a higher specific surface and greater sorption activity on carbon dioxide. Formula of the invention alkali, characterized in that, with Helium, the specific surface area of the sorbent and its sorption activity on carbon dioxide is increased They are taken from solutions containing ferric iron and zirconyl at a ratio of 1.l and drying the precipitate at: 85 "9SC. Sources of inits (} yurmash taken into account by the examination of 1, USSR Author's Certificate No. 568451, cl. B O13) 53/02, 1975.

2. Authors certificate of the USSR Mg 643431, cl. C 01 Q 25 / O2, 1977 (prototype).