SU1402577A1 - Method of producing bismuth cuprite - Google Patents

Abstract

The invention relates to inorganic chemistry, namely to methods for producing bismuth cuprite, and allows to simplify and speed up the process. Bismuth cuprite is obtained by mixing nitric acid solutions of bismuth and copper with sodium hydroxide solution and carrying out the process of interaction at 40-100 ° C. 1 hp f-ly, 1 tab.

Description

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The invention relates to inorganic chemistry, namely to a method for obtaining bismuth cuprite. ; The purpose of the invention is to simplify and speed up the process.

Example. 3.80 g of Bi (NOe) 3 -SHjO- (0.00784 mol) and 0.946 g Cu (Shz) are dissolved in 20 ml of 5% nitric acid (0.0163 mol) | HNCO (0.00392 mol). The resulting qTBOp is slowly introduced under constant stirring into a boiling solution of 2 |, 10 g of caustic soda, (0.0524 mol), t | , in 44 ml of water. The resulting suspension, in which the concentration of excess alkali is 3.0 g / l, is boiled for 15 minutes. The product yield is 2.1 g (98%). X-ray phase analysis shows 20 n | alychie in the product of a single crystal-T1allic phase.

Found,%: Bi 76.0; C 11.5.

BigCuOa.

Calculated,%: Bi 76.63; C 11.64. 25

PRI mme R 2. 22.8 ml of 5% abotic acid (0.0186 mol) were grown; 3.40 g of B (Nc) e 5HBO (0.0070 mol) and 0.845 . g Cu (daz) 2- HjO (0.0035 mol). The thief obtained is slowly poured with constant stirring into a solution of 4.67 g sodium hydroxide (0.117 mol) d 255 ml of water heated to 40 ° C. The resulting suspension, in which the concentration of unreacted plastic is 10 g / l, is kept at 40 ° C for 9 hours. Output

g (98%). Product one14025772

up to 70 ° C solution of 6.60 g of sodium hydroxide (0.165 mol) in 125 ml of water. The resulting suspension, in which the concentration of unreacted alkali is 20 g / l, is held at 70 ° C for 25 minutes. Product output 3.22 g (95%)% The product is single phase.

Found,%: Bi 76.2; C 11.5.

BijCuOfl.

Calculated,%: Bi 76.63; C 11.64.

The table presents the product yield and the process duration depending on the conditions for the precipitation of bismuth cuprite.

35

niiiOflyKTa 1, 87 F4zen. : Found,% :. Bi 75.7; C 11.4.

BijCuOj.

Calculated,%: Bi 76.63; C 11.64. : PRI me R 3. In 6 ml of 6% nitric acid (0.0344 mol) dissolve 6.02 g of Bi (NOj) 3 5Н20 (0.012242 mol) and 1.50 g of Cu (N03 ) 3HjO (0.00621 mol). The resulting solution is slowly poured with constant stirring in a heat

45

As can be seen from the table, the higher the excess alkali concentration and the higher the temperature, the shorter the duration of the process. When the concentration of nitric acid is below 5%, the bismuth salt is hydrolyzed during the preparation of its solution and a precipitate of basic salts precipitates, and if the target product is formed, then its output is insignificant and there are impurities of hydroxides and basic bismuth and copper nitrates.

The implementation of the proposed method allows to simplify and speed up the process while reducing energy and labor costs.

Formula inventions

The method of obtaining bismuth cuprite from compounds, copper and bismuth when heated, characterized in that, in order to simplify and speed up the process, the latter is carried out at 40-100 ° C by mixing bismuth and copper nitrates, previously dissolved in dilute nitric acid, with an aqueous solution caustic soda.

2. The method according to claim 1, about tl and h and u and sh with use

the fact that nitric acid with a concentration of 5-6 wt.%.

0

five

about

five

0

five

As can be seen from the table, the higher the excess alkali concentration and the higher the temperature, the shorter the duration of the process. When the concentration of nitric acid is below 5%, the bismuth salt is hydrolyzed during the preparation of its solution and a precipitate of basic salts precipitates, and if the target product is formed, then its output is insignificant and there are impurities of hydroxides and basic bismuth and copper nitrates.

The implementation of the proposed method allows to simplify and speed up the process while reducing energy and labor costs.

Formula inventions

The method of obtaining bismuth cuprite from compounds, copper and bismuth when heated, characterized in that, in order to simplify and speed up the process, the latter is carried out at 40-100 ° C by mixing bismuth and copper nitrates, previously dissolved in dilute nitric acid, with an aqueous solution caustic soda.

2. The method according to claim 1, about tl and h and u and sh with use

the fact that nitric acid with a concentration of 5-6 wt.%.

".".

Use nitric acid concentration of 5 wt.%

impractical due to overspending it and alkali, going

to neutralize.

The product contains impurities of hydroxides and basic salts.

copper and bismuth.

It’s impossible to carry out the process at a temperature

as the alkali solution boils.

Compiled by V.Grodzovska Editor T.Lazorenko Tehred M.Hodanich Corrector M.Maksimishinets

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Order 2822/16 Circulation 446 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Claims (2)

Claim A method of producing bismuth cuprite from compounds, copper and bismuth by heating, characterized in that, in order to simplify and accelerate the process, the latter is carried out at 40-100 ° C by mixing bismuth and copper nitrates previously dissolved in dilute nitric acid with an aqueous solution caustic soda. 2. The method according to claim 1, with the fact that nitric acid is used with a concentration of 5-6 wt.% Temperature, Concentra- Excess con Continue The output is ° C otsiya nitrogen centration caustic bodyness duct,% sour go sodium in the the process you're out mixture, nom solution, wt.% g / l thirty 5 56 The product does not form 40 5 56 80 min 97 40 5 10 l 9 h 98 fifty 4 10 Product not formed 60 5 43 10 minutes. 97 70 6 * 20 25 min 95 70 5 10 40 min 96 ’ 70 4 10 100 min 20** 80 5 - Product not formed 80 5 4.8 30 minutes 96 90 5 2.0 45 min 98 90 5 1,0 3 h 97 100 5 10 8 min 97 100 5 3.0 15 minutes 98 100 I** 5 0.5 70 min 97 700 (prototype) 100 h 98 * It is not advisable to use nitric acid with a concentration higher than 5 wt.% Due to its overconsumption and alkali used for neutralization. ** The product contains impurities of hydroxides and basic salts of copper and bismuth. It is impossible to carry out the process at temperatures above 100 ° C, since the alkali solution boils.