Precipitated white charcoal black vs gas phase white carbon black, how different is the production and application of the two?

White carbon black is a synthetic hydrated silicon dioxide powder common name, its appearance is white fluffy powder, the original particles are very fine, light, after absorbing moisture in the air will become a cluster of fine particles, with a larger surface area, absorption capacity and dispersion capacity, etc. , is a very important chemical raw materials. However, in the actual production, according to the preparation process, white carbon black will often be divided into precipitation method and gas phase method two factions - the reaction process is different, so that they in the materialized nature, microstructure will have some differences, its application areas and application effects are also different, so it needs to be treated differently.
such as precipitation of white carbon black, its synthesis process is essentially the process of converting dense crystalline quartz sand into loose anaerical hydrated silicon dioxide, i.e. SiO2→SiO2.nH2O

. The specific process can be divided into traditional precipitation method and gel method, the former refers to silicate through acidification to obtain loose, finely dispersed, floc-like structure precipitation out of SiO2, the raw materials of the method is readily available, the production process is simple, low energy consumption, less investment, but higher environmental requirements, product activity is not high, particles are not easy to control, poor affinity, low performance; However, because the process is more complex than the traditional precipitation method and the cost is high, it is less applied.
As for the gas phase method white carbon black, its production process is mainly chemical vapor deposition (CVD) method, the process is also known as pyrethromation, dry or combustion method, the raw materials are generally silicon tetrachloride, oxygen (or air) and hydrogen, they react at high temperatures. The advantage of gas phase method is that it is easy to control the reaction conditions, the product purity is high, suitable for the synthesis of high purity white carbon black. However, due to the high cost of raw materials used, high equipment requirements, complex technology, low production, large investment scale, so the price of such white carbon black is higher, limiting its wider application.
Leo left: gas phase method white carbon black right: precipitation method white carbon black
not the same process, different performance, precipitation method white carbon black and gas phase method white carbon black after many years of development, have their own "home".
but from time to time there are people curious, if the precipitation process to make some improvements, that precipitation method white carbon black can be competent for the work of gas phase white carbon black? Or with gas phase white carbon black instead of precipitation white carbon black, the performance of the product will not be greatly improved?
To answer questions like this, first of all, you have to know the two processes and the products they produce, so as to understand how to balance the balance of quality and cost, will be held in Guangzhou on July 2-3, "2020 National Silica Materials Innovation and Application Technology Exchange", is your all-round understanding of the precipitation of white carbon black and gas-phase white carbon black a good opportunity. At that time, Mr. Jiang Yilong from Limeida New Materials Technology Research and Development (Guangdong) Co., Ltd. will share with us a report entitled "Precipitated white carbon black vs gas phase white carbon black production and application prospects", comparing the differences in the process and performance of the two, and then on this basis to analyze their application prospects. If you're interested, don't miss it!
about the
, Jiang Yilong, male, 64 years old, high-level workers. He graduated from Jiangxi University in 1985 with a major in chemistry. 85-02 in Nanchang chemical raw materials factory engaged in light calcium carbonate, electric stone, precipitation white carbon black production technology. 02-04 in Dongguan Nantai Insulation Materials Co. , Ltd. engaged in gas phase white carbon black filled high temperature glue and medium temperature glue research and development work. From 04 to 05, he worked in the engineering design of civil explosion products at the National Defense Industrial Design Institute of Jiangxi Province.
2005-08 in Jiujiang Huaxuan chemical plant engaged in calcium carbonate, white carbon black ultra-fine transformation work. From 2008 to 10 years in Nanchang Zhongde Plastic Products Co., Ltd. engaged in acid, ketone building sealant production technology work. 10 to 12 years in Zhejiang Hengye into silicone Co. , Ltd. engaged in alcohol-type and molded silicone rubber research and development work. From 12 to 2018, he was engaged in the research and development and analysis and testing of alcohol-type transparent silicone rubber, mid-aminosilane, silane modified polyurethane resin and transparent spur adhesive at Jiujiang Huaxian Chemical Plant. From 2018 to date, he has served as the head of tree-related project development of Limeida New Materials Technology Research and Development Co., Ltd.
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