SU627083A1

SU627083A1 - Natrium arsenate producing method

Info

Publication number: SU627083A1
Application number: SU772480265A
Authority: SU
Inventors: Назар Янкелевич Любман; Светлана Вениаминовна Береза
Priority date: 1977-04-28
Filing date: 1977-04-28
Publication date: 1978-10-05

Description

Изобретение относитс к технологии получени арсената натри , используемого дл jipoHSBOACTaa инсектицидов.This invention relates to a technology for producing sodium arsenate used for insecticides jipoHSBOACTaa.

Известен способ получени арсената натри , включающий окисление соединени трехвалентного мышь ка хлором в присутствии основани с получением растворимого хлорида металла и нерастворимого арсената. Последний обрабатывают соединением , катион которого образует более раствс имый арсенат, а анион, с катионом основани - соединение с меньшей рас творимостью , чем у арсената fl.A known method of producing sodium arsenate involves oxidizing the trivalent mouse compound with chlorine in the presence of a base to form soluble metal chloride and insoluble arsenate. The latter is treated with a compound whose cation forms a more soluble arsenate, and the anion, with a base cation, forms a compound with a lower solubility than fl arsenate.

Недостатком такого способа вл етс его мнсйгостадийность.The disadvantage of this method is its multi-stage operation.

Известен также способ получени арсе- ната натри путем окислени трехокиси мышь ка нитратом натри в присутствии едкого натра при температуре выше 150С, преимущественно при 350°С. Процесс ведут в течение 2 Ч;, затем смесь раствор ют в воде и из раствора вьщел ют целевой продукт. В случае проведени процесса в насыщенном водном растворе необходимо примен ть давление до 25О фунтов There is also known a method of producing sodium arsenate by oxidation of arsenic trioxide with sodium nitrate in the presence of sodium hydroxide at a temperature above 150 ° C, preferably at 350 ° C. The process is carried out for 2 hours; then the mixture is dissolved in water and the desired product is extracted from the solution. If the process is carried out in a saturated aqueous solution, it is necessary to apply pressure up to 25 pounds.

на 1 квадратный дюйм, так как в пр6тк&ном случае скорость ьэамодействи уменьшаетс и увеличиваетс длительность процесса 2j.by 1 square inch, as in the sixth case, the rate of its interaction decreases and the duration of the process 2j increases.

Недостатками этого способа вл ютс необходимость использовани высоких температур или давлени и многостадийность процесса.The disadvantages of this method are the necessity of using high temperatures or pressures and the multistage process.

Целью изобретени вл етс упрощение способа.The aim of the invention is to simplify the method.

Цель достигаетс описываемым способом получени арсената натри , включающим окисление соединени трехвалентного мышь ка соединением двухвалентной меди в присутствии едкого натра при 10-100 СThe goal is achieved by the described method for the production of sodium arsenate, including the oxidation of a compound of trivalent arsenic with a compound of divalent copper in the presence of caustic soda at 10-100 ° C

В качестве соединени меди предпочтительно берут гидроокись или карбонат меди .Copper hydroxide or copper carbonate is preferably used as the copper compound.

Отличительными признаками предлагаемого способа вл ютс используемый окислитель и температура процесса.Distinctive features of the proposed method are the used oxidizing agent and the process temperature.

Claims

These differences will simplify the process by lowering the process temperature and reducing the number of operations. Carrying out the process at a lower temperature requires special cooling; performing the process at a higher temperature is undesirable. Example 1. Alkaline eluate, with. containing 28 g / l mouse (III) and 93 g / sodium hydroxide are treated with 28 g of freshly precipitated copper hydroxide obtained by the interaction of a 10% solution of copper sulfate with 10% sodium hydroxide solution. The mixture is stirred for 10 min at 30 ° C, after which the formed metallic honey is filtered. The filtrate contains 2Sr / n mouse (§) as Ma and 93 g / l caustic soda. After two (by volume) evaporation, 97% of the content in it is crystallized from the solution sodium arsenate. The mother liquor is used to prepare the circulating eluate. Example 2. A 1 liter of alkaline eshoat containing 28 g / l of lithium a (III) and 93 g / l of caustic soda is treated (29.8 g of copper carbonate. The mixture is stirred for 10 minutes at which time the resulting metallic copper. Next, everything as in example 1, claims 1. A method for producing sodium arsenate, including oxidation of the compound of the trivalent minh in the presence of caustic soda, characterized in that, in order to simplify the process, the oxidation is carried out by compound of divalent copper and the process is at 10-100 ° C. 2, The method according to claim 1, distinguishing This is due to the fact that copper hydroxide or carbonate is used as a copper compound. Sources of information taken into account in the examination 1. US patent N9 1589691, Cl, 23-53, 15.06.26.

2. US patent Ns 1737639, cl. 23-53, 03.12.29.