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Topic: How to prepare Sodium Tetraborate Solutions?  (Read 609 times)

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Offline metallurgy

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How to prepare Sodium Tetraborate Solutions?
« on: June 16, 2020, 03:57:56 AM »
How to prepare Sodium Tetraborate Solutions?

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #1 on: June 16, 2020, 04:12:20 AM »
Dissolve a solid compound in water.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #2 on: June 16, 2020, 05:27:43 AM »
Dissolve a solid compound in water.
According to literature the tetraborates should be 0.09-0.68 %(w.) of metallurgical coke and 3g./L. density,

So shall I dissolve 9-68g. solid sodium tetraborates in 100mL. of pure water and then discharge into spray-flasks and eject onto 10kg. of metallurgical coke?

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #3 on: June 16, 2020, 10:55:44 AM »
Sodium tetraborate (borax) can be anhydrous, pentahydrate, or decahydrate. You must make sure which chemical your description applies to. In addition, borax dissolves poorly in water. To dissolve the maximum amount you will need about 1 to 2 liters of water depending on the temperature.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #4 on: June 17, 2020, 01:18:52 AM »
Sodium tetraborate (borax) can be anhydrous, pentahydrate, or decahydrate. You must make sure which chemical your description applies to. In addition, borax dissolves poorly in water. To dissolve the maximum amount you will need about 1 to 2 liters of water depending on the temperature.

Decahydrate.

And room temperature.


Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #5 on: June 17, 2020, 01:49:54 AM »
Solubility about 30 g/L
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #6 on: June 17, 2020, 02:09:25 AM »
Solubility about 30 g/L

But in literature they've shown 3-5-7-10 g. /L , the why?

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #7 on: June 17, 2020, 03:58:31 AM »
What literature? The temperature is missing.
The solubility of an anhydrous substance - 13, 16, 27, 39 g/L at 0, 10, 20, 30°C, respectively. For decahydrate - 1.895 times more.
Your data concern probably solubility of decahydrate in 100 g water at an unidentified temperature - my guess 10, 30, ~90, 100°C.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #8 on: June 17, 2020, 04:37:19 AM »
What literature? The temperature is missing.
The solubility of an anhydrous substance - 13, 16, 27, 39 g/L at 0, 10, 20, 30°C, respectively. For decahydrate - 1.895 times more.
Your data concern probably solubility of decahydrate in 100 g water at an unidentified temperature - my guess 10, 30, ~90, 100°C.

In this patent:

It shows 3-10g/L.

https://patents.google.com/patent/RU2539186C1/en

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #9 on: June 17, 2020, 11:42:57 AM »
The patent clearly informs us that numbers concern anhydrous borate but hydrates are used.
A solution (or suspension of calcium tetraborate) containing 3 to 10 g of anhydrous borate in an amount sufficient to obtain a content of 0.2 to 0.5% borate in coke is used. The English text is a faithful translation of the original Russian patent.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #10 on: June 18, 2020, 04:52:55 AM »
The patent clearly informs us that numbers concern anhydrous borate but hydrates are used.
A solution (or suspension of calcium tetraborate) containing 3 to 10 g of anhydrous borate in an amount sufficient to obtain a content of 0.2 to 0.5% borate in coke is used. The English text is a faithful translation of the original Russian patent.

if we use 0.5%(w.) of borate for 10 kg. coke then we need to use 50 g. borate and 1-2 litres pure water, right?

Or in order to prepare 5g./L density , we need to use 10-20 litres pure water?

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #11 on: June 18, 2020, 11:26:39 AM »
Yes, 10 L of water. But the coke temperature is 1050 +- 50°C.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #12 on: June 19, 2020, 02:28:07 AM »
Yes, 10 L of water. But the coke temperature is 1050 +- 50°C.

So? What coke temperature does if its that high?

Offline AWK

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #13 on: June 19, 2020, 03:12:58 AM »
Try to estimate. Coke cooling, according this patent,  lasts 90-120 seconds.
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Offline metallurgy

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Re: How to prepare Sodium Tetraborate Solutions?
« Reply #14 on: June 19, 2020, 08:08:40 AM »
Try to estimate. Coke cooling, according this patent,  lasts 90-120 seconds.

Is the litres of solution changes when it comes to 1100C temp.?


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