Technology of carbon alkali method for producing borax by adding activator

An activator, carbon-alkali process technology, applied in the field of chemical engineering, can solve the problems of waste of compression work, large amount of difficulty, increasing the number of tanks, etc., and achieve the effect of saving capital construction costs, balancing work, and accelerating decomposition.

Inactive Publication Date: 2006-06-14
吕秉玲
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  • Abstract
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Problems solved by technology

[0007] Quantity is difficult, increasing the number of tanks requires additional investment and increased management
[0008] (5) When four carbon decomposition tanks are c

Method used

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  • Technology of carbon alkali method for producing borax by adding activator
  • Technology of carbon alkali method for producing borax by adding activator
  • Technology of carbon alkali method for producing borax by adding activator

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Experimental program
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Embodiment

[0026] Contains 13.16% B 2 o 3 3083kg of cooked boron magnesium ore powder and 587kg of NaHCO sent from the centrifuge 3 Use the borax mother liquor of the last cycle to make a slurry, enter the carbonization tank, and feed it with about 30% CO 2 Kiln gas 460m 3 , decompose the boron ore powder, B 2 o 3 The decomposition rate reaches 90%. The pulp is sent to the filter press to filter out the slag, and then 1000kg of borax is crystallized. The borax mother liquor is returned to the carbon solution tank for slurry adjustment. The tail gas from the carbonization tank contains about 21.3% CO 2 , into the carbonation tower from the bottom. Feed at the top of the carbonation tower, containing Na per liter 2 CO 3 178g, NaHCO 3 The solution of 88g and DEA 11g is 2.66m 3 The solution out of the carbonation tower contains Na per liter 2 CO 3 32g, NaHCO 3 99g, and suspended solid NaHCO 3 587g, NaHCO from the carbonation tower 3 After the solution is filtered, it is...

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Abstract

The present invention relates to a technological process for producing borax by using activator-added carbon alkaline process. It is characterized by that in the solution 0.05-0.2 mol/L of diethanolamine (DEA) or methyl diethanolamine (MDEA) can be added as activator, and Na2 solid of NaHCO3,boron mineral powder and boric acid mother liquor obtained from last circulation are used, and made into slurry, then in the carbon decomposition tank the boron mineral powder can be decomposed so as to obtain the invented borax.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and relates to a process for producing borax by a carbon-alkali method with an activator added. Background technique [0002] Carbon-soda production of borax is a traditional production process, which has the following disadvantages: [0003] (1) No activator was used to accelerate Na 2 CO 3 The solution absorbs CO 2 The speed, so the reaction speed is very slow, generally need 18-22h boron ore decomposition to achieve complete. Taking a borax plant with an annual output of 80,000 tons as an example, about 13 systems and 50 φ2.5×5.5m carbonization tanks need to be installed to meet the production requirements, and the infrastructure cost is very high. [0004] (2) The decomposition reaction of boron ore can only be carried out under constant stirring at 130-135°C and 0.6MPa pressure. Stirring and heat preservation for a long time consume a lot of energy. [0005] (3) When 3-4 ca...

Claims

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Application Information

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IPC IPC(8): C01B35/12
Inventor 吕秉玲
Owner 吕秉玲
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