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Method for preparing baking soda and white carbon black from rice husk power generation waste

A technology of baking soda and white carbon black, applied in chemical instruments and methods, alkali metal compounds, silicon dioxide, etc., can solve the problems of unsatisfactory economic value and unusable physical and chemical properties of caustic soda, and achieve high economic value, The effect of profit improvement

Inactive Publication Date: 2011-12-14
叶阳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] 2. Utilization methods of rice husk ash and related issues
But this also makes the main physicochemical properties of caustic soda, especially its ability to dissolve silica, unusable
Therefore, the economic value of caustic soda used as a raw material is not ideal

Method used

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  • Method for preparing baking soda and white carbon black from rice husk power generation waste
  • Method for preparing baking soda and white carbon black from rice husk power generation waste
  • Method for preparing baking soda and white carbon black from rice husk power generation waste

Examples

Experimental program
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Effect test

Embodiment 1

[0094] Add 1500 grams of 15% caustic soda solution to the pressure reactor with stirring, and then add 500 grams of rice husk ash with a silicon dioxide content of 67.5%, and react at 160° C. and corresponding saturated steam pressure for 75 minutes to complete the reaction. The reaction product is filtered, and the filter residue is watered twice, each time the water consumption is three times the weight of the filter residue, and the washing water is recovered and incorporated into the silicic acid nanofiltrate, and then washed with water until the pH is 8 to 7, and then dried to obtain a specific surface of 650m 2 159 grams per gram of activated carbon. Filtrate is Na 2 O and SiO 2 The sodium silicate solutions with contents of 9.49% and 18.36% respectively, weighing 1780 grams, were carbonized according to the following steps.

[0095] Add 650 grams of the above-mentioned sodium silicate solution into a stirred reactor, add 1500 milliliters of water to dilute (total vol...

Embodiment 2

[0097] Add 450 grams of rice husk ash with a silica content of 74.1% to the pressure reactor with stirring, and then add 1100 grams of 20% caustic soda solution, and react at 200° C. and corresponding saturated steam pressure for 60 minutes. Filter the reaction product, firstly dilute the filter residue with water twice, each time the water consumption is three times the weight of the filter residue, wash water recovery and merge into silicate nanofiltrate, continue to wash with water until pH 8-7, and then dry to obtain a specific surface area of ​​635m 2 114 grams of active carbon per gram; Filtrate weighs 1390 grams, is the sodium silicate solution that sodium oxide and silicon dioxide content are respectively 11.9% and 23.2%, prepare baking soda and white carbon black by following carbonization step:

[0098] Add 500 grams of the above-mentioned sodium silicate solution into a stirred reactor, control the temperature at 75° C., add 1800 grams of 13.5% sodium bicarbonate sol...

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Abstract

A rice hull utilization method matched with power generation comprises the following steps: by utilizing caustic soda and silica and rice hull ash generated by rice hull power generation as raw materials, reacting the caustic soda with the silica in the rice hull ash to generate sodium silicate, filtering, rinsing the filter residue, and activating to obtain activated carbon; and reacting the filtrate sodium silicate with carbon dioxide to generate sodium bicarbonate and white carbon black.

Description

technical field [0001] The invention relates to a utilization method of rice husk ash and carbon dioxide discarded in rice husk power generation, in particular to a method for preparing baking soda, white carbon black and activated carbon by using rice husk ash and carbon dioxide as raw materials and caustic soda. Background of the invention [0002] 1. Rice husk power generation and related issues [0003] The use of rice husk as fuel for power generation, the so-called rice husk power generation, is the need for the optimization of my country's energy structure. [0004] my country is the largest country in the world that uses coal as its main energy source. Among the more than 3 billion tons of coal produced every year, most of them are used as energy, which brings serious ecological and environmental problems. [0005] Accelerating the development and utilization of renewable energy to reduce coal consumption and change my country's coal-based energy structure is neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C01B31/08C01D7/00
Inventor 叶阳叶天润
Owner 叶阳
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