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Preparation method of high dispersed white carbon black

A high-dispersion white carbon black, pulping technology, applied in chemical instruments and methods, dyeing low molecular organic compound treatment, dyeing organic silicon compound treatment, etc., can solve the problems of wide distribution range, poor dispersion, strong hydrophilicity, etc. , to achieve the effect of improving dispersibility, improving dispersibility and improving lipophilicity

Active Publication Date: 2013-09-11
FUJIAN ZHENGSHENG INORGANIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing production method of precipitated silica generally uses liquid water glass and concentrated sulfuric acid as raw materials, and is prepared through precipitation reaction, press filtration, pulping, and spray drying. Strong, coarse particles and wide distribution range, poor dispersion, so it is rarely used in tires

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The specific operation steps of embodiment one are as follows:

[0017] 1. Refined water glass

[0018] Take 40m 3 The liquid water glass after being dissolved by steam is left for clarification, and the supernatant liquid is taken to prepare a liquid water glass with a concentration of 23%, for use.

[0019] 2. Synthesis of silica

[0020] at 50m 3 Add 25m to the reactor 3 Industrial water, raise the temperature to 50℃, add 23% liquid water glass 1.1~1.2m 3 , add surfactant SDS30Kg, compound silane coupling agent 80Kg prepared according to the weight ratio NXT:Si69:A151=2:1:1, under stirring conditions, dropwise add concentrated sulfuric acid and 23% liquid water glass, concentrated sulfuric acid drops Plus about 0.2m per hour 3 , 23% liquid water glass is 3m per hour 3 , after the reaction to pH 8.5 ± 0.2, aging for 30min. The temperature was raised to 90 °C again, and under stirring conditions, concentrated sulfuric acid and 23% liquid water glass were added ...

Embodiment 2

[0027] The specific operation steps of the second embodiment are as follows:

[0028] 1. Refined water glass

[0029] Take 50m 3 The liquid water glass after being dissolved by steam is allowed to stand for clarification, and the supernatant liquid is taken to prepare a liquid water glass with a concentration of 20%, for use.

[0030] 2. Synthesis of silica

[0031] at 50m 3 Add 22m to the reactor 3 Process water, heat up to 55°C, add 20% liquid water glass for 1.1-1.2m 3 , add surfactant SDS40Kg, compound silane coupling agent 90Kg prepared according to weight ratio NXT:Si69:A151=2:1:1, under stirring condition, dropwise add concentrated sulfuric acid and 20% liquid water glass, concentrated sulfuric acid drop Plus about 0.2m per hour 3 , 20% liquid water glass is 3m per hour 3 , the reaction to PH is 8.5 ± 0.2, aging 30min. The temperature was raised to 90°C again, and under stirring conditions, concentrated sulfuric acid and 20% liquid water glass were added dropwis...

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PUM

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Abstract

The invention discloses a preparation method of high dispersed white carbon black. According to a new method and technology, a synthesis reaction of liquid soluble glass and concentrated sulfuric acid is carried out in two steps by first preparing fine seeds, and then carrying out a synthesis reaction, wherein the synthesis reaction is a precipitation reaction carried out under effects of an organic surfactant SDS and a composite silane coupling agent. The high dispersed precipitated white carbon black specially used in high-performance tyres is obtained through particle surface cladding, modification treatment, press filtration, washing, pulping and pressure drying. The method improves a traditional white carbon black production technology of a precipitation method by optimizing technological parameters and using an optimized auxiliary agent to meet a requirement of enhanced product dispersiveness; besides the method overcomes defects of an ordinary precipitation method, such as crude particles, wide distribution, strong hydrophilism and weak mixing dispersion. A prepared product has characteristics of fine primary particles, low surface hydroxyl content, increased lipophilicity,high bonding force with rubber high molecules and high wettability, and is an ideal reinforcing filling material specially used in high-performance tyres.

Description

1. Technical field [0001] The invention relates to a method for manufacturing inorganic functional powder materials, in particular to a method for preparing high-dispersion precipitation silica for high-performance tires. 2. Background technology [0002] Precipitated silica is a widely used inorganic functional powder material, mainly used in ordinary rubber, silicone rubber, coatings, inks, pesticides, papermaking and other fields. The production method of silica for tires is mainly the precipitation method. The existing precipitation method for producing white carbon black generally uses liquid water glass and concentrated sulfuric acid as raw materials, and is prepared by precipitation reaction, pressure filtration, pulping, and spray drying. Strong, coarse particles and wide distribution range, poor dispersion, so it is rarely used in tires. With tire radialization, environmental protection and energy saving, and higher requirements for comfort, the application of sil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28C09C3/12C09C3/06C09C3/08
Inventor 谭玉泉汤道英
Owner FUJIAN ZHENGSHENG INORGANIC MATERIAL