As early as 3700 BC, the Egyptians used tin . In 1800 BC, the Chinese have a bronze products. The late Shang Dynasty in China was the era of bronzes and the first peak of the development of bronze crafts. In 1939, China's famous Situ Wu Ding, which was unearthed in Wuguan Village, Anyang, Henan Province, was the product of this period. The 875kg Sita Wu Ding is the largest among the bronze wares unearthed in China, and is rare in the world bronze ware. Cocamide DEA, or cocamide diethanolamine, is a diethanolamide made by reacting the mixture of fatty acids from coconut oils with diethanolamine. CDEA,Coconut Diethanolamide CDEA,CDEA For Washing Hand,Cocamide DEA 6501 HENAN JINHE INDUSTRY CO.,LTD , https://www.hncarbonblack.com
Yunnan old mines have been mining tin mines as early as BC. Since the Qing Emperor Qianlong, the tin industry has gradually prospered. As of the end of the Qing Dynasty and the early Republic of China, the tin industry flourished. According to customs records, from 1889 to 1939, a total of 300,766 tons of tin were exported. Guangxi and Hunan have a long history of tin production. According to the report, Song Yuanfeng produced 23,218,98 kilograms of tin per year, of which Hezhou had an annual output of 878,950 kilograms. Dachang used silver in the Song Dynasty and collected tin in the early Qing Dynasty.
Since the beginning of this century, some important tin mining areas in China have done some geological surveys of varying degrees. More important ones are: M. Lecrele and J. Deprat from 1898 to 1910, and Ding Wenjiang's investigation of the old in 1914; from 1934 to 1940, Meng Xianmin and others carried out 1:50,000 to 1:10,000 terrain geology and pits.ç¡ Geological survey; in 1941, Gu Gongxu conducted an electrical geophysical test in an old factory. From 1941 to 1949, Li Siguang and others conducted a survey of the mining area and regional geology of He (Chongqing) He (county) Zhong (mountain) in Guangxi; in 1945, Xie Jiarong wrote "The Xianghe junction of Fuhe Zhongjiang sand tin mine and the general discussion of China's tin mine distributed". Meng Xianmin et al. also investigated the Xianghualing tin deposit in Hunan Province. In 1936, he was the author of the Hunan Linwu Xianghualing tin deposit.
After the founding of New China, in order to meet the needs of the development of China's tin industry, a large-scale census exploration work was carried out. In the 1950s, the first old tin mine was first surveyed. In the mid-1950s, a series of large and medium-sized sand-tin deposits were discovered. In the 1960s, several original tin mine exploration reports were submitted from old factories and pine feet. Dachang tin also began work in 1955, the former mining old people Cave and "three small veins open-air" begin, find a series of large and rich deposits of tin metal. In the 1950s, Guangxi Fuhezhong and Guangdong Hailufeng also carried out census exploration work based on sand and tin, and quickly discovered industrial reserves. With the 1:200,000 and 1:50,000 regional geological surveys, the development of mineral censuses and the wide application of geophysical and geochemical methods, since the 1960s, new discoveries have been made not only in some old mining areas and in the periphery, but also in some new tins. Mining areas, belts and new types of tin mines, such as the West Anhui Tin Belt identified in the 1980s (including Ximeng and other tin mines have been put into development), the first large-scale porphyry tin mine discovered and evaluated in the 1980s - Guangdong Xinyi Yinyan tin mine.
After more than 40 years of geological surveys and census exploration work, China has formed a tin mining industrial base with the old, big factory and peace Gui as the backbone, becoming the world's leading tin production country.
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