Preparation method of high dispersed white carbon black

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 an inorganic functional powder material, in particular to a method for preparing high-dispersion precipitation white carbon black used 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 used in tires is mainly the precipitation method. 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. With tire radialization, environmental protection and energy saving, and higher and higher requirements for comfort,...

Examples

Embodiment 1

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

[0017] 1. Refined water glass

[0018] Take 40m 3 After the liquid water glass dissolved by the steam is allowed to stand for clarification, the supernatant liquid is taken to make a 23% liquid water glass for subsequent use.

[0019] 2. Synthesis of silica

[0020] at 50m 3 Add 25m to the reactor 3 For industrial water, heat up to 50°C, add 23% liquid water glass 1.1~1.2m 3 , add surfactant SDS30Kg, by weight ratio NXT: Si69:A151=2: 1: 1 compound silane coupling agent 80Kg of preparation, under stirring condition, add the concentrated sulfuric acid and 23% liquid water glass dropwise simultaneously, the concentrated sulfuric acid drops Add about 0.2m per hour 3 , 23% liquid water glass is 3m per hour 3 , after reacting to a pH of 8.5±0.2, aging for 30 minutes. Raise the temperature to 90°C again, under the condition of stirring, add concentrated sulfuric acid and 23% liquid water glass dropwise at...

Embodiment 2

[0027] Embodiment two specific operation steps are as follows:

[0028] 1. Refined water glass

[0029] Take 50m 3 After the liquid water glass dissolved by the steam is allowed to stand for clarification, the supernatant liquid is taken to make a 20% liquid water glass for subsequent 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 1.1~1.2m 3 , add surfactant SDS40Kg, by weight ratio NXT: Si69:A151=2: 1: 1 compound silane coupling agent 90Kg of preparation, under stirring condition, add the concentrated sulfuric acid and 20% liquid water glass dropwise simultaneously, the concentrated sulfuric acid drops Add about 0.2m per hour 3 , 20% liquid water glass is 3m per hour 3 , react until the pH is 8.5±0.2, and age for 30 minutes. Raise the temperature to 90°C again, under the condition of stirring, add concentrated sulfuric acid and 20% liquid water glass dropwise at the same time, ...

1. Technical field

[0001] The invention relates to a method for manufacturing an inorganic functional powder material, in particular to a method for preparing high-dispersion precipitation white carbon black used 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 used in tires is mainly the precipitation method. 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. With tire radialization, environmental protection and energy saving, and higher and higher requirements for comfort,...

Examples

Embodiment 1

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

[0017] 1. Refined water glass

[0018] Take 40m 3 After the liquid water glass dissolved by the steam is allowed to stand for clarification, the supernatant liquid is taken to make a 23% liquid water glass for subsequent use.

[0019] 2. Synthesis of silica

[0020] at 50m 3 Add 25m to the reactor 3 For industrial water, heat up to 50°C, add 23% liquid water glass 1.1~1.2m 3 , add surfactant SDS30Kg, by weight ratio NXT: Si69:A151=2: 1: 1 compound silane coupling agent 80Kg of preparation, under stirring condition, add the concentrated sulfuric acid and 23% liquid water glass dropwise simultaneously, the concentrated sulfuric acid drops Add about 0.2m per hour 3 , 23% liquid water glass is 3m per hour 3 , after reacting to a pH of 8.5±0.2, aging for 30 minutes. Raise the temperature to 90°C again, under the condition of stirring, add concentrated sulfuric acid and 23% liquid water glass dropwise at...

Embodiment 2

[0027] Embodiment two specific operation steps are as follows:

[0028] 1. Refined water glass

[0029] Take 50m 3 After the liquid water glass dissolved by the steam is allowed to stand for clarification, the supernatant liquid is taken to make a 20% liquid water glass for subsequent 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 1.1~1.2m 3 , add surfactant SDS40Kg, by weight ratio NXT: Si69:A151=2: 1: 1 compound silane coupling agent 90Kg of preparation, under stirring condition, add the concentrated sulfuric acid and 20% liquid water glass dropwise simultaneously, the concentrated sulfuric acid drops Add about 0.2m per hour 3 , 20% liquid water glass is 3m per hour 3 , react until the pH is 8.5±0.2, and age for 30 minutes. Raise the temperature to 90°C again, under the condition of stirring, add concentrated sulfuric acid and 20% liquid water glass dropwise at the same time, ...