Silicone oil generally refers to silicone
oil, and silicone oil is generally dimethyl silicone oil. It is a polyorganosiloxane
with a chain structure of different degrees of polymerization. It is made by
dimethyldichlorosilane hydrolysis to obtain the initial polycondensation ring,
the ring body is cracked, refined to obtain a low ring body, and then the ring
body, head capping agent, catalyst together can be mixed to obtain a variety of
different degrees of polymerization, after reduced pressure distillation to
remove the low boiling substance can be prepared to obtain silicone oil.
The most commonly used silicone oil, the
organic group is all methyl, called methyl silicone oil. Organic groups can
also be used with other organic groups instead of partial methyl groups to
improve a certain performance of silicone oil and suitable for a variety of
different uses. Common other groups are hydrogen, ethyl, phenyl, chlorophenyl,
trifluoropropyl and the like. In recent years, organic modified silicone oil
has been rapidly developed, and many organic modified silicone oils with
special properties have emerged.
Silicone oil has many special properties, such as small temperature and viscosity coefficient, high and low temperature resistance, oxidation resistance, high flash point, small volatility, good insulation, small surface tension, non-corrosive to metals, non-toxic and so on. Because of these properties, silicone fluids have excellent results in many ways. Among the various silicone oils, methyl silicone oil is the most widely used and is the most important variety of silicone oil, followed by methylphenyl silicone oil. A variety of functional silicone fluids and modified silicone fluids are mainly used for special purposes. Silicone Oil,Silicone Fluid Chemicals,Types Of Silicone Oil,Silicone Lubricating Oil,Silicone Based Oil WUHAN RUISUNNY CHEMICAL CO. LTD , https://www.ruisunny-chem.com
On May 12th this year, Zeyi Industrial Group signed a cooperation agreement with Hangzhou Linda on the technology of large methanol synthesis. Zeze Group finally selected Hangzhou Linda's large-scale horizontal water-cooled methanol synthesis reactor with independent intellectual property rights, Linda's high temperature and energy efficient methanol synthesis technology, and the annual production of 1 million tons of coal-made raw material gas and methanol synthesis technology package to build Inner Mongolia Chifeng 1 million tons/year coal chemical project. This marks that the domestically produced large-scale methanol synthesis tower has gone through a decade of grinding and has already had the confidence and strength to equip the Chinese chemical industry. Based on the requirements of “equal temperature, high efficiency, energy saving, reliability, low investment, and large sizeâ€, Linda will aim at a one million-ton large-scale methanol single-synthesis tower, which will increase the synthesis pressure and reduce the cycle ratio. Increase the synthesis rate to reduce the diameter of the synthesis plant equipment and pipelines, reduce investment and energy consumption, and concentrate on breakthrough heat transfer problems under high synthesis rates and strong reaction heat.
Linda developed a number of large-scale methanol synthesis technologies such as air-cooled, axial water-cooled, radial water-cooled, and air-cooled, water-cooled combinations. The air-cooled homogeneous temperature reactor has been used in many industrial applications and has become a mature tower type. Its characteristics are large catalyst loading coefficient and high production intensity, small temperature difference in the catalyst layer, and low pressure drop, and can be conveniently used in large scale Methanol plant.
Linda's isothermal methanol synthesis technology has been successfully applied in 10 sets of methanol plants. The largest scale of equipment that has been put into operation is a large-scale synthesis tower with a diameter of 3 meters. It is used in two sets of 200,000 tons/year of methanol in Tianye, Inner Mongolia and Suihua, Shaanxi. The device, which is currently the largest domestic methanol synthesis plant built and put into operation using natural gas and coal-water slurry pressure gasification technology respectively. At present, there are 9 sets that have been processed or being processed, including a 3.2-meter-diameter large-scale synthesis tower for a 300,000-ton/year methanol plant of Dalian Dahua Group, Shaanxi Tianlin Coal Chemicals, Shanxi Tianhao, Yunwei Yunnan, and Shanxi Lanke 20 Million / year methanol plant with a large synthesis tower. The methanol synthesis tower has the advantages of small equipment volume, good catalytic activity, high CO conversion rate, low consumption of raw material gas, and low investment, and the comprehensive performance has reached a level that can compete with foreign technologies.
Hangzhou Linda is a national high-tech industrialization enterprise specializing in the design, development and manufacture of methanol, ammonia synthesis technology and synthesis towers. It integrates patent developers and equipment manufacturers and undertakes a series of national major projects. Especially in methanol synthesis technology has a leading domestic level and large-scale methanol synthesis tower successful performance. Now we have a total of 16 domestic and international authorized patents, and it is the patent developer with the most patents for methanol synthesis technology and reactors in China. Linda's large-scale low-pressure, temperature-type methanol synthesis tower technology is the first of its kind at home and abroad. It has completely independent intellectual property rights and can form its own methanol synthesis technology and equipment. It can replace imported technology and can also export complete sets of technologies. It has a strong international Competitive ability. In 2004, Linda's low-pressure, uniform-temperature methanol tower won the second prize for national technology invention.
In addition, the representative methanol synthesis technologies include the outer-tube cold-adiabatic complex methanol synthesis tower technology of East China University of Science and Technology and the GC-axis radial methanol synthesis tower technology of Nanjing Guochang Chemical Technology Co., Ltd. The external cold-insulated composite methanol synthesis technology of the shell is composed of an upper thermal insulation layer and an outer cold layer of the lower shell. The upper thermal insulation layer functions to raise the temperature and further purify the gas. The lower shell layer is the main reaction body, and the tube is filled with a catalyst. The single-pass conversion rate of the synthesis tower is high, the export methanol content is high, the energy utilization is reasonable, and the catalyst has a long service life. This achievement formed China's proprietary methanol synthesis tower technology and reached the international advanced level. It won the second prize for scientific and technological progress of the China Petroleum and Chemical Industry Association, and provided technical support for large-scale methanol plants in China. This achievement has been or is being implemented in Zhejiang Juhua Co., Ltd. 100,000 tons/year methanol plant, Shandong Hualu Hengsheng Chemical Company 200,000 tons/year methanol plant, Shandong Yankuang Group Guotai Chemical Co., Ltd. 200,000 tons/year multiple More than 20 sets of methanol plants such as the methanol plant and the Shandong Yankuang Coal Chemical Company's 200,000 tons/year coke oven gas methanol plant were implemented. Among them, 9 companies have already put into production and achieved good results. At present, East China University of Science and Technology has provided large-scale single-series design software packages for methanol synthesis towers with an annual output of 100,000 to 400,000 tons, and large-scale single-series design packages for parallel methanol synthesis towers with an annual output of 500,000 to 800,000 tons. , It can also provide a large-scale single-series basic design process package for the tandem methanol synthesis tower with an annual output of 600,000 to 1 million tons.
The GC-type shaft radial methanol synthesis tower has a novel technical structure and reasonable design. It fills the gap of the shaft radial low-pressure methanol synthesis tower in China, and its technical indicators have reached the international advanced level. In May 2005, the 150,000-ton/year methanol synthesis tower project developed by Nanjing Guochang Chemical Technology Co., Ltd. was successfully put into operation in the second phase of Shandong Jiutai Energy Technology Co., Ltd., marking the largest shaft diameter in China's independent research and development capacity. The methanol synthesis technology was successfully put into operation. At present, Nanjing Guochang has been able to independently undertake the process design and equipment production of methanol synthesis below 600,000 tons/year. The GC-type methanol synthesis towers produced can have a diameter ranging from 800mm to 3600mm.
Properties: colorless, tasteless, non-toxic and not easy to volatilize liquid.
Uses: There are a variety of different viscosities. It has high heat resistance, water resistance, electrical insulation and low surface tension. Commonly used as advanced lubricating oil, shock oil, insulating oil, defoamer, mold release agent, polishing agent, isolating agent and vacuum diffusion pump oil, etc.; Emulsion can be used for car tire glazing, instrument panel glazing, etc. Methyl silicone oil is the most commonly used. After emulsification or modification, it is used to smooth and soft finish on the textile finish, and emulsified silicone oil is also added to the shampoo of daily care products to improve the lubrication of hair. In addition, there are ethyl silicone oil, methyl phenyl silicone oil, nitrile-containing silicone oil, polyether modified silicone oil (water-soluble silicone oil) and so on.
Domestic large methanol synthesis tower is widely used
For a long time, China's methanol plants have been mainly small-scale installations. At present, there are only a few units with a single-scale capacity of over 200,000 tons/year. In July last year, the National Development and Reform Commission issued a document setting the reasonable scale of methanol to an annual output of 1 million tons. The large-scale installation of equipment will inevitably require large-scale equipment. In recent years, East China University of Science and Technology, Hangzhou Linda Chemical Technology Engineering Co., Ltd., Nanjing Guochang Chemical Technology Co., Ltd. and other units have done a lot of innovative work in the design of large-scale methanol synthesis towers, and China's self-developed large-scale low-pressure methanol synthesis technology The crafts and equipment have become more sophisticated and mature.