In foreign countries, the development of its profile: in 1953 the United States of America Reid proposed from seawater and bitter salt water to obtain cheap freshwater reverse osmosis research program, in 1960 the United States of Sourirajan and Leob Professor developed a new asymmetric membrane, from the RO as an economical desalination technology into the practical and device research stage. 1960 Loeb (Loeb) and Soli Larkin. Loeb (Loeb) and Sorilakin (Suan) made the first high flux and high desalination rate of cellulose acetate membrane, for reverse osmosis and ultrafiltration membrane separation technology laid the foundation. In the same year, Loeb and Milstein with their successful development of cellulose acetate reverse osmosis membrane research and assembly success of the first laboratory scale plate and frame reverse osmosis membrane device.
In 1961, the United States Hevens first proposed the manufacture of tubular membrane modules; in 1964, the United States General Atomics developed a spiral reverse osmosis modules; in 1965, the University of California made for brackish water desalination of tubular reverse osmosis device, production capacity of 19 t / d; in 1967 the United States social state (Dupout) company first developed a nylon-66 as the membrane. Nylon - 66 as the membrane material hollow fiber membrane parts; in 1970 and the development of aromatic polyamide as the membrane material "PermaseB-9" hollow fiber membrane module, and won the 1971 U.S. Kirkpatrick (Kirkpatfiek) the highest award for chemical engineering. early 1980s, the United States to overcome the shortcomings of cellulosic materials. In the early 1980s, the United States to overcome the shortcomings of cellulose materials, research and development of high water flux, high salt interception rate of composite polyamide membrane, reverse osmosis technology is widely used in industrial areas.
The early 1970s began to use RO method to treat electroplating wastewater, first used for nickel plating wastewater recycling treatment, and thereafter applied to the treatment of chromium plating, copper plating, galvanizing and other rinsing water, as well as mixed plating wastewater. 1965 Britain first published a patent for the treatment of electrophoretic coating wastewater with a semi-permeable membrane. After that, P.P.G Company of USA proposed the combined technology of UF and RO to treat the sewage of electrophoretic coating and realized the industrialization. 1972-1975 J J .Porter et al. carried out the experiments of dyeing wastewater treatment and reuse with dynamic membranes. 1983 L.Tinghuis et al. published the results of the research on the treatment of dyeing solution with RO method. 1969 J .C.V Smith of USA firstly reported the results of the treatment of dyeing wastewater with semi-permeable membranes. C. V Smith first reported the treatment of municipal wastewater. 30 years, reverse osmosis (RO) technology has been oil, degreasing wastewater, fiber industry wastewater, paper industry wastewater, radioactive wastewater and other industrial water treatment, desalination of brackish water, pure water and high purity water preparation, the pharmaceutical industry and the special chemical process and high-rise building wastewater and other types of wastewater treatment has been widely used. Especially in recent years, some new membrane wastewater treatment technologies come out one by one, such as membrane distillation, liquid membrane, membrane biochemical reactor, controlled release membrane, membrane phase separation, membrane extraction and so on. China's reverse osmosis research began in 1965, in recent years reverse osmosis technology has been widely used in China. Reverse osmosis technology was initially used only for seawater desalination, and then gradually expanded to the desalination of brackish water, food processing, medicine and health, beverage purification, ultra-pure water preparation, etc., has produced high economic benefits.
In China, the development of membrane technology from 1958, the beginning of ion exchange membrane research. 1958 began to carry out research on ion exchange membrane, and electrodialysis desalination of seawater launched a pilot study; 1965 began to explore reverse osmosis membrane, 1966 Shanghai Chemical Plant polyethylene heterogeneous ion exchange membrane formally put into operation, laying the foundation for the industrial application of electrodialysis. In 1967, the desalination of seawater war on the progress of China's membrane science and technology has played a positive role in promoting the 1970s on electrodialysis, reverse osmosis, ultrafiltration and microfiltration membranes and components of the research and development, the 1980s into the popularization and application of the stage. 1980s in the middle of China's gas separation membranes have made great strides in the study of the gas separation membrane in 1985, the Chinese Academy of Sciences, the Dalian Institute of Chemical Physics, for the first time, the successful development of the hollow fiber N2/H2 separator. Fiber N2 / H2 separator, the main performance indicators close to the indicators of similar products abroad, is now put into mass production, the cost of each set of imported devices is only 1/3. into the 90's, the preparation of composite membranes has made greater progress.
Korea Korea is the world's only reverse osmosis membrane production technology and RO drinking machine production technology of the company, and has obtained Japan's "JHP" certification, the United States "FDA certification", in the "China", the company has obtained "JHP" certification. The company has obtained the "CCC" certification in China, the "MA" approval from the Ministry of Health of China, and the Contribution Award for the Development of Bad Environment and Health Industry jointly issued by the General Administration of Bad Environment Protection, the Ministry of Health of the People's Republic of China, and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. The company's business development has benefited from the good cooperation with overseas customers, which has led to a rapid development in the application of membrane separation technology. At present, Shih-Khan has seven mainstream water treatment technologies and 21 individual and series products, including reverse osmosis membrane separation technology, microfiltration membrane separation technology, ultrafiltration membrane separation technology, nanofiltration technology, ion exchange technology, EDI continuous desalination technology, MBR membrane bioreactor, and its services cover the fields of electronics and optics, semiconductor, precision machining, energy development, fine chemical industry, biomedicine, textile printing and dyeing, seawater / brackish water desalination, food and beverage, and rural areas. desalination, food and beverage, and rural drinking water projects. Shih-Khan membrane is widely used in water treatment equipments, such as reverse osmosis water purifier, ion exchange equipment, ultrapure water equipment, pharmaceutical water purification equipment, ultrafiltration equipment, continuous electric desalination system, seawater desalination equipment, potable water purification equipment, and other complete sets of system equipment.