The production method of sodium silicate

A production method and technology of sodium silicate, applied in the direction of silicate, alkali metal silicate, etc., can solve problems such as large energy consumption and environmental pollution

Active Publication Date: 2021-09-14
昌德新材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production process consumes a lot of energy, and the combustion of fuel will release a lot of carbon dioxide, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) Provide waste alkali solution, quartz sand and fuel oil produced during alkali washing in the process of producing cyclohexanone by cyclohexane oxidation method for future use.

[0056] 2) The content of Na element recorded in the spent alkali solution by element analysis is 8.3%, and the content of Si element in the quartz sand is 46.1%; the calorific value of the spent alkali solution is 1789kcal / kg, and the heat value of fuel oil is measured by a calorimeter. The value is 10980kcal / kg.

[0057] 3) Mix 1 t of spent alkali solution and 0.1095 t of quartz sand to obtain a mixed solution for later use.

[0058] 4) Add 0.3615t of fuel oil to the mixture prepared in step 3), incinerate in an incinerator, incinerate at 1410°C to 1520°C for 8 hours, and obtain 0.221t of sodium silicate solid after cooling. The purity is 98.4%.

[0059] Among them, t represents the unit: tons.

Embodiment 2

[0061] 1) Provide waste alkali solution, quartz sand and fuel oil produced during alkali washing in the process of producing cyclohexanone by cyclohexane oxidation method for future use.

[0062] 2) The content of Na element recorded in the spent alkali solution by element analysis is 16.5%, and the content of Si element in the quartz sand is 43.5%; the calorific value of the spent alkali solution is 3421kcal / kg, and the heat value of fuel oil is measured by a calorimeter. The value is 10980kcal / kg.

[0063] 3) Mix 1 t of spent alkali solution and 0.1004 t of quartz sand to obtain a mixed solution for later use.

[0064] 4) Add 0.4362t of fuel oil to the mixture prepared in step 3), incinerate in an incinerator, incinerate at 1410°C to 1520°C for 8 hours, and obtain 0.439t of sodium silicate solid after cooling. The purity is 95.1%.

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Abstract

The invention provides a production method of sodium silicate, which uses the waste alkali solution produced in the process of producing cyclohexanone by the cyclohexane oxidation method or the concentrated solution produced in the refining process of caprolactam as the sodium source, and the quartz sand provides the silicon source , Incineration to get sodium silicate. It avoids the generation of "hazardous waste" such as sodium carbonate and sodium sulfate during the incineration of waste lye or concentrated solution, turning waste into treasure, reducing the cost of environmental protection for enterprises, and at the same time, the incineration of waste lye or concentrated solution provides silicon The energy required for the production of sodium silicate reduces the amount of fuel used, thereby reducing the production cost of sodium silicate, reducing energy consumption and carbon dioxide emissions, and reducing environmental pollution.

Description

technical field [0001] The invention relates to the production field of sodium silicate, in particular to a production method of sodium silicate. Background technique [0002] The production of cyclohexanone by cyclohexane oxidation is an important part of the production of caprolactam, but in the production process, the selectivity is only about 85%, and the oxidation by-products are mainly dicarboxylic acids, hydroxycarboxylic acids, caprolactone and other substances. These substances form a waste liquid solution (commonly known as "saponified liquid") containing a large amount of sodium carboxylate and sodium hydroxide after alkali washing. At the same time, during the ion exchange refining process of caprolactam, an aqueous solution (commonly known as "concentrate") containing caprolactam, sodium sulfate, ammonium sulfate, and sodium nitrate will be produced. At present, the main treatment method for the above-mentioned spent lye and concentrated solution in industry is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/32
CPCC01B33/32
Inventor 蒋卫和罗小沅
Owner 昌德新材科技股份有限公司
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