Na2CO3
H2O/H2SO4
High purity sand ==> Silicon oxide ======>Silicate glass (SiO2/Na2O) ==========> SiO2
(SiO2/Na2O)aq + 2 H2SO4
Polymerization
Nucleation Growth Aggregation Consolidation
SiO2 + Na2SO4 + H2O
Layout of Main Manufacturing process
Sand
Sodium Carbonate
Dilution
Mixing Chamber
Oven 1400℃
Liquid Silicate
Vitrous Silicate
H2O
dissolution
2) Dis-advantage : Poor dispersity and processing problems.
Manufacturing methods of silica
1.Natural Silica
2.Synthetic Silica --Amorphous type
（1）Fumed silica (pyrogenic process)--Anhydrous silica
。
Economic Development Zone of BanQiao
Fengyang Anhui (New)
DongHuTang Wuxi
Agenda
公司的历程 Company History
白炭黑的一般特性与产品 General properties and our products of silica 白炭黑的应用 Application of Silica & Carbon Black
• Poor interaction of silica with elastomer leads to the careful selection of microstructure of solution SBR to get optimum reinforcement.
2019
The 3rd line Construction in Wuxi( 160 acres)
Establish R＆D Center at Q&C
201 2
Total cap of silica 370,000MT／YR sodium silicate 560,000MT/YR
2016
Achievement of Big 3 Silica maker
Company history
2019 Foundation
Development History
2019
2019
2009
1st plant commercial Production of
silica production
advanced
silica
Plant construction in Fengyang Anhui (800 acres)
CONTENTS
SILICA
CARBON BLACK
Structure
Polarity Affinity with Polymer Filler-Filler Interaction Polymer-Filler Bonding
Cost
Polar
Low
High Chemical Bonding
(with Silane Coupling Agent)
SiO2 + -(-Six(OH)y-)n-
Types
1) Raw silica 2) Silane coupled silica 3) New silica(High dispersible)
Properties
1) Advantage : Improvement of R/R & Wet traction Low H.B.U and good CUT&CHIP Excellent Snow & Ice traction
pollution and harmful health 4.To induce next generation filler 5.To prepare green round and
regulation
General properties of Silica
Chemical structure
（2）Electric arc silica (Pyrogenic process) （3）Fused silica （4）Silica gel (Wet process) （5）Precipitated silica (Wet process)---Hydrated silica
Precipitated silica
Silica+Si69 ASTM C/B
Wet grip
“Green Tire Concept” introduced into European Market.
• This can be achieved mainly with silica/silane system and a special solution SBR polymer to overcome the trade-off problem in performances among wet grip, rolling resistance and abrasion.
Filler-Filler Interaction Interaction with elastomer
Silanols : isolated Geminal,Vicinal
Hydrophilic
Strong (poor dispersion)
Weak
Phenol,carboxyl ketone, quinone
Classification R.R.
WET SNOW Abrasion Cost Processing Efficiency
Better
Worse
Silica properties & Tires Performance
Newsil-115
Dispersibility
Improve Processability
High High E-SBR
100 100
Wet Traction Region
R.R. Region
Tan Delta
CB Comp’d Silica Comp’d
-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Comparison of Silica vs. Carbon Black Compound
OC 2H 5
OC 2H5
Silanol Group of Silica
Bis-(3-Ethoxy Silylpropyl)- S i
Tetrasulfane
Si
(Si-69)
Si
Si
Si
O Si OC2H5
O
(C H2)3 S S
O Si (C H2)3 S S
O
O C2H5
OH
Intermediate
2) Filling agent is used for reducing cost, improving processibility and increasing rubber volume without deteriorating physical properties.
.
Types
1) Reinforcing agent : Silica, Hard clay 2) Filling agent : Soft clay, CaCO3, Ca(OH)2,TALC.
H2SO4 precipitation
slurry
filtration washing cake SiO2 + H2O liquefaction
Drying
grinding micronization
compacting
storage
Inorganic filler
Definition
1) Reinforcing agent is used for improving hardness, tensile strength, tear strength and abrasion resistance
Application of Silica & Carbon Black
April.26th.2019
Wuxi Quechen silicon chemical Co.,Ltd
The Front View and location of Company
Q&C Wuxi Quechen Silicon Chemical Co.,Ltd.Position:
Volume specific surface Area of fillers
0 20 40 60 80
100
200
300
400
Volume specific surface area,㎡/cm3
Figure49
A perspective of the Surface Area of Differrent for Rubber
Prospect and Development of silica
Trend and Requirment of silica
1.To reduce contamination(CO2↑etc) 2.To reduce fuel energy consumption 3.To prevent environmental