Fumed silica is that air and hydrogen are sent to the synthetic hydrolysis furnace after being dried, dedusted and filtered respectively. Send the silicon chloride raw material to the evaporator for heating and evaporation, and send it to the synthetic hydrolysis furnace with the dry filtered air as the carrier. After being vaporized at high temperature, silicon chloride is hydrolyzed with a certain amount of hydrogen and oxygen (or air) at high temperature; At this time, the generated fumed silica particles are very fine and form aerosols with the gas, which is not easy to trap, so it is first aggregated into larger particles in the aggregator, then collected by the cyclone separator, and then sent to the deacidification furnace. The fumed silica is purged with hot air or steam to a pH value of more than 6, which is the finished product. SiCl4＋2H2＋O2—>SiO2＋4HC。


A large part of the products of medical bottle caps and corks are produced with chlorinated butyl rubber, and the waste medical bottle caps and corks can be recycled and reprocessed into chlorinated butyl reclaimed rubber to replace chlorinated butyl rubber to produce rubber products and reduce costs. High pressure and high temperature rubber tubes are one of them. Improving the heat resistance of chlorinated butyl rubber can further increase the amount of chlorinated butyl reclaimed rubber and reduce the production cost of more proportion 1jlyy99-sxc. The basic performance requirement of steam hose is that the hose has good heat resistance and steam resistance. Chlorinated butyl reclaimed rubber retains the basic performance characteristics of chlorinated butyl rubber, and itself has excellent air tightness and good heat resistance and steam resistance. Reasonable adjustment of the formula of chlorinated butyl reclaimed rubber steam hose can further prolong the service life of high-pressure and high-temperature rubber hose directly supplied, as follows: 1 Use white carbon black, 2 Choosing the appropriate vulcanization system, commonly known as white carbon black is the general term of white powdered X-ray amorphous silicic acid and silicates, which mainly refers to precipitated silica, fumed silica, ultra-fine silica gel, powdered synthetic aluminum silicate and calcium silicate, etc. in the rubber industry, its main role is to replace carbon black as a reinforcing agent in light colored rubber products.


Active ingredient carrier, pesticide carrier, semiconductor silicon wafer polishing agent, powder anti caking agent... Fumed silica (known as fumed silica) is a fine and special amorphous powder material prepared by high-temperature hydrolysis of chlorosilane with oxyhydrogen flame. The average primary particle size is about 7-40 nm, the aggregate particle size is about 200-300 nm, and the specific surface area is 50 ~ 380m2 / g.


Rubber is an elastomer with excellent flexibility, but its comprehensive performance is not satisfactory. In the process of producing rubber products, carbon black is usually added to the rubber to improve the strength, wear resistance and aging resistance. However, due to the addition of carbon black, the products are black and of low grade. The advent of fumed silica in China has laid a material foundation for the production of a new generation of rubber products with novel colors and excellent performance.


The cut growth resistance and tear strength of the former are greatly improved compared with those of the latter. The tread of natural rubber engineering machinery tires using high dispersive precipitated silica can obtain the effects of low heat generation, good tear resistance and fatigue tear resistance of tread blocks. Sidewall sidewall is an outer layer of rubber that can protect the carcass from climate erosion.


Silica alcohol group (≡ Si oh) on the surface of silica, a silane coupling agent, is very easy to react with fatty acid zinc to produce ≡ Si oznr, etc. The hydrogen ion on the silanol group is replaced, which weakens the polarity of the surface of silica, reduces the self polymerization of surface disaggregation, reduces the Mooney viscosity of rubber, and is conducive to the dispersion of silica, but does not improve the physical properties. Dispersion of zinc salts.


Soda extraction method indirect alkali melting method is to carbonize rice husks and other gramineous plants and boil them in alkali to generate sodium silicate solution, then acidify and neutralize them, filter, wash and dry them to obtain white carbon. The white carbon obtained by this method has low impurity content and good product quality, but improper carbonization temperature control is easy to cause product performance degradation. Indirect alkali melting.