Preparation method of high-quality white carbon black for rubber

A white carbon black, high-quality technology, applied in the field of preparation of high-quality white carbon black for rubber, can solve the problems of low particle specific surface area and oil absorption value, affecting product performance, uneven particle size distribution, etc., and achieve high oil absorption value. , Easy to operate, good whiteness effect

Inactive Publication Date: 2010-05-12
CHINACOAL PINGSHUO GRP
View PDF0 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This method can use sodium silicate with high impurity content to produce white carbon black, but the gas-liquid reaction time of this method is long, and the produced white carbon black generally has larger particles. At a temperature of about 80 ° C, the precipitated SiO 2 Small grains are prone to polycrystalline growth, resulting in uneven particle size distribution and low purity, resulting in SiO 2 The specific surface area and oil absorption value of the particles are very low, which will affect the performance of the product, especially in the field of rubber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dilute the sodium silicate solution with high impurity content to NaSiO 3 The mass concentration is 10%, put it into the carbon separator, heat up to 75°C, and feed CO 2 Gas, stirring, so that the pH value of the sodium silicate solution drops from> 14 to 10.5, stop the ventilation, and filter and separate the precipitated substances in the solution.

[0025] Take a small amount of primary carbon fractionation liquid, add water to dilute it by 1 times, put it into the carbon separator as the bottom liquid, and pass CO 2 At the same time as the gas carbon is separated, the remaining primary carbon liquid is flowed in parallel. When the pH value of the solution drops to 8, the ventilation is stopped, and then filtered and separated. The obtained solid isolate is washed and dried, which is high-quality silica for rubber with a purity > 99.3% and an average particle size of about 10 μm.

[0026] The precipitate obtained from the first carbon separation is boiled with 20% ...

Embodiment 2

[0029] Dilute common industrial grade sodium silicate solution to Na 2 SiO 3 The mass concentration is 10%, put it into the carbon separator, heat up to 75°C, and feed CO 2 Gas and stirring, when the pH value of the solution drops to 10.5, stop the ventilation, filter and separate the precipitate.

[0030] Take a small amount of primary carbon residue liquid, add water to dilute it by 1 time, put it into the carbon separator as the bottom liquid, and pass CO 2 At the same time as the gas, co-flow the remaining primary carbon fractionation liquid for the second co-flow carbon fractionation. When the pH value of the solution drops to 8, stop the aeration, and then filter and separate the precipitate. The obtained solid isolate is washed and dried to obtain SiO 2 High-quality silica for rubber with a purity > 99.3% and an average particle size of 10 μm.

[0031] The precipitate obtained from the first carbon separation, with a concentration of 40% H 2 SO 4 Boil the solution...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of high-quality white carbon black for rubber, which comprises the following steps: introducing CO2 gas into sodium silicate solution, heating up, stirring, and reacting till the pH value of solution is reduced to be 9-10.5, stopping carbonation, and conducting solid-liquid separation; conducting cocurrent and carbonation of residual liquid and the CO2 gas till the pH value of the solution is reduced to be 7-8, conducting solid-liquid separation, and obtaining the high-quality white carbon black for rubber by washing and drying solids; and soaking or heat cooking solid sediment separated in first carbonation with strong acid to remove impurities, and also obtaining the high-quality white carbon black for rubber by washing and drying. The white carbon black prepared by the method has high purity, fine and uniform granularity, good whiteness, and higher values of specific surface area and oil absorption of SiO2 particles, and can be directly used as high-quality white carbon black for rubber, with application performance meeting the performance index requirements of national standard white carbon black for rubber products.

Description

technical field [0001] The invention relates to a preparation method of white carbon black, in particular to a preparation method of high-quality white carbon black for rubber. The present invention adopts the sodium silicate solution for secondary carbonization, especially adopts the gas-liquid parallel flow method to prepare white carbon black during the second carbonization. Background technique [0002] Silica is pure and ultrafine silicon dioxide, which is widely used in various fields such as rubber, paint, plastic, paper, ink, and daily chemicals. [0003] The methods of industrial production of white carbon black include precipitation method, gas phase method, hydrothermal synthesis method and gel method. Among them, the precipitation method is the main industrial method for producing white carbon black at present. The precipitation method is divided into sulfuric acid method, hydrochloric acid method, nitric acid method and carbon dioxide carbon method due to the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 王惠玲郑强廉文君杨露郭继萍霍云露
Owner CHINACOAL PINGSHUO GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap