At present, only a few countries have developed silicon carbide ceramic membrane products in the world, and only one domestic company has achieved mass production. As the most high-end product in the field of ceramic membranes, all the silicon carbide membrane materials required in the domestic water treatment field need to be imported. The price and supply of materials are monopolized by foreign companies, and the products are expensive, which restricts the speed and scope of the promotion of silicon carbide ceramic membranes. This project implements the industrialization of silicon carbide film series products, breaking foreign monopolies and filling domestic gaps. Therefore, there are not many patent applications and publications for silicon carbide film in the world, but it is in a stage of rapid growth. There is an urgent need to invest quickly to consolidate the patent layout in this field. The global ceramic membrane industry patents are mainly concentrated in developed countries such as the United States and Japan, and the Chinese market has great potential. From the perspective of the existing patented technical fields, they are mainly distributed in the technical fields of filtration, packaging, batteries, and heat insulation, with filtration as the mainstay.
From the perspective of important patent applicants, Kurita Industry, Kubota, Hitachi, Nippon Electric, Japan Electric, Toray, JSR, Praxair Technology Co., Ltd., Nanjing University of Technology, Membrane Technology and Research Institute, Asahi Kasei, and Tsinghua University are all related Frequently cited patents. Combining the different application fields and technologies, the focus of research and development is different, there is the possibility of competition and strategic cooperation, and the opportunities and challenges of industry development coexist.
In terms of university literature, water treatment and food industry related to the application of ceramic membranes are the hot spots of literature research. The literature sources are mainly universities and colleges. The main application technology fields include water treatment, food industry, biochemical and pharmaceutical industry, gas-solid separation, membrane catalysis, etc. The number of patent applications in foreign biochemical and pharmaceutical industries and gas-solid separation fields has reached more than 60%, reflecting the importance of foreign companies on research in these two fields. Among the most frequently cited patents, MEDALERT INC`s catalytic ceramic membrane steam-hydrocarbon reformer, APPLIED MATERIALS INC`s device, and semiconductor processing chamber surface cleaning methods have all received greater attention.
In terms of the distribution of silicon carbide membrane patent technology, it is still mainly distributed in the preparation of silicon carbide membrane and the production of membrane filters; compared with Dijie membrane technology, the application field is more extensive, not only for water treatment, but also for gas filtration. For example, the biomass fuel gas produced by the biomass gasifier contains a large amount of fly ash, solid particles and tar due to the poor combustibility of the biomass raw material itself. In order to reduce the corrosion of the alkaline dust in the combustible gas to downstream equipment and the blockage of the pipeline, and to achieve efficient purification of combustible gas with low energy consumption, it is necessary to directly separate gas and solid under high temperature conditions. At the same time, in the process of gas purification, it is necessary to avoid as much as possible the problems of equipment corrosion and pipeline blockage caused by tar condensation. Due to the high temperature of biomass combustible gas, it is easy to cause the service cycle of the cloth bag to decrease. At the same time, the high dust content of biomass combustible gas makes the dust box overloaded, and the number of solenoid valve injections increases, so the silicon carbide ceramic membrane can be very good. To solve the problem. In short, silicon carbide film has a very wide range of applications, and the current patent layout and competition are in their infancy.
What is the use of silicon carbide ceramic membrane?
2020 08/03