New process for co-producing ultra-fine white carbon black and calcium carbonate

A technology of white carbon black and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, silicon dioxide, silicon oxide, etc., can solve a large number of acidic saline wastewater, large average particle size of white carbon black, and wide particle size distribution range. and other problems, to achieve the effect of reducing energy consumption, good social benefits and low cost

Inactive Publication Date: 2010-12-01
BEIJING ZIGUANG YINGLI CHEM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The solid content of the paste obtained by the traditional precipitation method is only 20% during solid-liquid separation, and the drying energy consumption is high. The average particle size of the produced white carbon black is large and the particle size distribution range is wide. At the same time, a large amount of acidic saline wastewater is produced. question

Method used

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  • New process for co-producing ultra-fine white carbon black and calcium carbonate
  • New process for co-producing ultra-fine white carbon black and calcium carbonate
  • New process for co-producing ultra-fine white carbon black and calcium carbonate

Examples

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Embodiment 1

[0027] 1.1. Preparation of white carbon black

[0028]Add 440 kg of the sodium silicate solution obtained in 1.4 into the pressure-resistant dripping tank. The carbonization reactor is a loop reactor with an ultrasonic generator. Turn on the ultrasonic wave and the external circulation pump. The maximum output power of the ultrasonic generator is 1000W, and the frequency is 20-30KHz. Add 400kg of water and 6kg of sodium chloride into the carbonization reactor, add sodium silicate solution dropwise into the reaction tower when the temperature is 80-85°C and the system pressure is 0.1MPa, and at the same time, carbon dioxide and silicic acid are introduced into the gas distributor. After adding 44kg of sodium solution, stop adding, stop feeding carbon dioxide when the pH drops to 7-8, break the colloid after standing for 25 minutes, continue to add sodium silicate solution dropwise and feed carbon dioxide until the pH is 8-9 During the process, solid-liquid separation was carrie...

Embodiment 2

[0037] 2.1. Preparation of white carbon black

[0038] Add 440kg of the sodium silicate solution obtained in 2.4 into a pressure-resistant dropping tank. The carbonization reactor is a loop reactor with an ultrasonic generator. Turn on the ultrasonic wave and the external circulation pump. The maximum output power of the ultrasonic generator is 1000W, and the frequency is 20-30KHz. Put 400kg of water and 6kg of sodium chloride in the carbonization reactor. When the temperature is 80-85°C and the system pressure is 0.1MPa, add sodium silicate solution dropwise into the reaction tower and simultaneously feed carbon dioxide and silicic acid through the gas distributor. After adding 44kg of sodium solution, stop adding, stop feeding carbon dioxide when the pH drops to 7-8, break the colloid after standing for 25 minutes, continue to add sodium silicate dropwise and feed carbon dioxide until the pH is between 8-9 During the process, solid-liquid separation was carried out while it ...

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Abstract

The invention provides a method for co-producing white carbon black and calcium carbonate. Carbide slag or lime and quartz sand are used as main raw materials. The method comprises the following steps of: introducing sodium silicate solution into carbon dioxide to obtain a mixture of white carbon black and sodium carbonate or sodium bicarbonate, filtering the solution, adding lime or carbide slag into the solution, preparing caustic soda and ultra-fine calcium carbonate by causticizing reaction, adding the quartz sand into the filtered dilute alkali liquor, and reacting the mixture under a heating band pressure to obtain sodium silicate solution so as to realize circulation and co-production.

Description

technical field [0001] The invention relates to a method for co-producing white carbon black and calcium carbonate in a high-efficiency carbonization reactor, comprising the following steps: feeding carbon dioxide into a sodium silicate solution to obtain a mixture of white carbon black and sodium carbonate or sodium bicarbonate; After adding lime or calcium carbide slag to the solution, caustic soda and ultrafine calcium carbonate can be obtained through causticization reaction, and the filtered dilute lye is added to quartz sand to react at a certain temperature and pressure to obtain sodium silicate solution, thereby realizing Circulation and coproduction. Background technique [0002] Quartz sand, also called quartz stone, is a hard, wear-resistant, chemically stable silicate mineral, the main component of which is silicon dioxide. The color is milky white or colorless and translucent, the hardness is 7, brittle without cleavage, shell-like fracture, oily luster, relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01B33/12
Inventor 孙响响查正炯尹应武
Owner BEIJING ZIGUANG YINGLI CHEM TECH CO LTD
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