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Method for preparing aqueous solution of neutral negative oxygen ions

A negative oxygen ion and aqueous solution technology, which is applied in chemical instruments and methods, inorganic chemistry, and other chemical processes, can solve problems such as the impact of attachments on damage, and achieve the effect of ensuring natural release and improving the ability of sustained release

Pending Publication Date: 2019-09-24
广州曜科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of attachment materials on the market contain acidic solutions, which have a greater impact on and damage to the attachment materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing an aqueous solution of neutral negative oxygen ions, comprising the steps of:

[0025] (1), react monazite concentrate with 45% sodium hydroxide aqueous solution at a temperature of 130° C. for 4.5 hours, and the obtained alkali: mineral mass ratio is 1:1;

[0026] (2), then dilute the reactant with 80°C hot water, and age at 60°C, and separate to obtain monazite alkali-dissolved cake;

[0027] (3), then fully dissolve the alkali-soluble cake with nitric acid, then extract uranium and thorium with 25% tributyl phosphate (TBP);

[0028] (4), after the uranium and thorium enters the organic phase, use pure water back extraction to obtain the uranium and thorium back extraction solution, then use 5.5% tributyl phosphate to extract uranium after concentration, extract thorium with 35% TBP kerosene liquid, and then Stripping, concentration and crystallization to produce thorium nitrate;

[0029] (5), then extract 1.5% crystalline thorium nitrate and ...

Embodiment 2

[0032] A method for preparing an aqueous solution of neutral negative oxygen ions, comprising the steps of:

[0033] (1), reacting monazite concentrate with 50% sodium hydroxide aqueous solution at a temperature of 140° C. for 5 hours, the obtained alkali: mineral mass ratio is 1:1.3;

[0034] (2), then dilute the reactant with 90 DEG C of hot water, and age at 70 DEG C, and obtain the monazite alkali-dissolved cake through separation;

[0035] (3), then fully dissolve the alkali-soluble cake with nitric acid, then extract uranium and thorium with 30% tributyl phosphate (TBP);

[0036] (4) After the uranium and thorium enter the organic phase, use pure water back extraction to obtain the uranium and thorium back extraction liquid, then use 6% tributyl phosphate to extract uranium after concentration, extract thorium with 40% TBP kerosene liquid, and then Stripping, concentration and crystallization to produce thorium nitrate;

[0037] (5), extract 2% crystalline thorium nitr...

Embodiment 3

[0040] A method for preparing an aqueous solution of neutral negative oxygen ions, comprising the steps of:

[0041] (1), react monazite concentrate with 55% sodium hydroxide aqueous solution at a temperature of 150° C. for 4.5-5.5 hours, and the obtained alkali: mineral mass ratio is 1:1.5;

[0042] (2), then dilute the reactant with hot water at 100°C, and age at 80°C, and separate to obtain monazite alkali-dissolved cake;

[0043] (3), then the alkali-soluble cake is fully dissolved with nitric acid, and then uranium and thorium are extracted with 35% tributyl phosphate (TBP);

[0044] (4), after the uranium and thorium enters the organic phase, use pure water back extraction to obtain the uranium and thorium back extraction solution, and then use 6.5% tributyl phosphate to extract uranium after concentration, extract thorium with 45% TBP kerosene liquid, and then Stripping, concentration and crystallization to produce thorium nitrate;

[0045] (5), extract 2.5% crystalli...

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PUM

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Abstract

The invention discloses a method for preparing an aqueous solution of neutral negative oxygen ions. The method comprises the steps: performing a reaction on monazite concentrate and a sodium hydroxide aqueous solution of 45-55% at a temperature of 130-150 DEG C for 4.5-5.5 h so as to obtain a reactant with a mass ratio of alkaline to ore at (1:1)-(1:1.5), then diluting the reactant by using hot water of 80-100 DEG C, performing thermal insulation aging at 60-80 DEG C, performing separation so as to obtain a monazite alkali-soluble cake, then dissolving the alkali-soluble cake completely by using nitric acid, then extracting uranium thorium by using tributyl phosphate of 25-35%, performing reverse extraction by using pure water after introduction of uranium thorium into an organic phase so as to obtain a strip liquid of uranium thorium, performing concentration, then extracting uranium by using tributyl phosphate of 5.5-6.5%, extracting thorium by using a TBP kerosene liquid of 35-45%, and then performing reverse extraction, concentration and crystallization so as to obtain thorium nitrate. Through the colorless transparent neutral aqueous solution of the negative oxygen ions, influence and damage of an original acidic solution on the material of an attached substance are avoided.

Description

technical field [0001] The invention relates to the technical field of negative oxygen ions, in particular to a method for preparing a neutral negative oxygen ion aqueous solution. Background technique [0002] Negative oxygen ions refer to oxygen ions that have acquired one or more electrons and are negatively charged. Negative oxygen ions, known as "air vitamins", are beneficial to the physical and mental health of the human body. They mainly affect the physiological activities of the human body through the human nervous system and blood circulation. At present, a large number of attachment materials on the market contain acidic solutions, which have a greater impact on and damage to the attachment materials. [0003] Chinese patent CN201910087778.3 states that black pine extract and cactus extract in air purifiers induce the release of more negative oxygen ions under the action of tourmaline powder and monazite powder, and at the same time reduce the radiation effect of ...

Claims

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Application Information

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IPC IPC(8): C01F15/00C22B3/38C22B59/00C09K3/00
CPCC01F15/00C09K3/00C22B59/00C22B3/382
Inventor 何伟燊
Owner 广州曜科环保科技有限公司
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