STC converted to silica
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The conversion of STC in polycrystalline production is a very problematic issue; currently, hydrogenation is used to convert it into TCS in most closed-loop processes, but the one-time conversion efficiency is low； I heard that large companies abroad convert STC into silica with high added value. Does anyone know anything about this process of converting it into silica? Also, what is the conversion rate for your hydrogenation reduction?
Our company does have it, but the production volume is not high, and the quality of the product varies significantly; what’s most important are the specific surface area and pH value
Most of the silica in China comes from Guangzhou Jibisheng; due to backward technology and widespread replication, silica is now following in the footsteps of polysilicon, with low-level repetitive construction taking place.
What was said upstairs is right; Wang Yuelin sells his technology everywhere, and the polysilicon factory was also easily deceived by him
1# hrdpeter: It seems that the domestic demand for white carbon black produced by vapor-phase methods isn’t very high; in China, the consumption is around 60,000 tons. Each ton of white carbon black requires 2.7 tons of STC, so this approach cannot fully address the STC issue； 2. Due to the limitations of the hydrogenation furnace itself, the conversion rate for thermal hydrogenation in China is around 20%. 3. It is said that cold hydrogenation can achieve around 30%
Cold hydrogenation is designed to achieve 25%, but in practice this level is not reached; too little STC is used for silica, so it is not possible to produce silicon tetrachloride from the reactions that take place. This is true unless the scale of polycrystalline silicon production is very small
Does anyone know where South Glass’s silica gel technology comes from? I heard that the products produced using this technology sell well