Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr2(SO4)3.x(H2O), where x can range from 0 to 18. Additionally, ill-defined but commercially important "basic chromium sulfates" are known. These salts are usually either violet or green solids that are soluble in water. It is commonly used in tanning leather. Basic Chrome Sulphate,Basic Chrome Sulfate for Tannery,Tanning Agent Basic Chrome Sulfate HENAN JINHE INDUSTRY CO.,LTD , https://www.hnchromiumoxidegreen.com
As a large manufacturing country in the world, China’s manufacturing scale in many industries is at the forefront. However, it is only a large scale. It is not high in terms of technology, and the industry is always big but not strong, and it is not in a position of being at a disadvantage.
The domestic bearing casting industry shoulders the important mission of localization of high-end equipment in China. Under the guidance of the “Twelfth Five-Year Planâ€, the bearing casting industry of China has formulated a plan for the development of the industry. Formulated guidelines for the development of the domestic mold industry with projects and exporting two carriages.
It is reported that under the drive of rail transit, medical equipment, new energy, aerospace, automotive lightweighting, and rail transit, the level of China's bearing casting industry has obviously improved. The bearing foundry industry has actively explored emerging markets while stabilizing the traditional market. Even marginal markets that were ignored in the past have also been developed.
According to relevant plans, during the “Twelfth Five-Year Plan†period, the high-speed rail will usher in the construction peak. In 2011, the national railway plans to invest 700 billion yuan in infrastructure investment, which provides a huge market opportunity for the entire high-speed rail equipment manufacturing enterprises. According to the “Medium-and-long-term railway network plan (adjusted in 2008)â€, by 2012, China will build 42 high-speed rail passenger lines with a total mileage of more than 13,000 kilometers, which will create 800 new demand for EMUs by 2020. China's high-speed railway mileage will reach 18,000 kilometers, providing a broad market space for China's high-speed railway bearings. Industry experts estimate that the high-speed rail bearing market in China will exceed RMB 2 billion in the next three years. However, the investigation of the weekly financial report found that as the high-speed train bearing field of high-speed rail infrastructure parts, the international giants such as Sweden SKF, Germany FAG, and Japan NTN are firmly occupying the Chinese market.
According to relevant sources, bearing is a key component of the country's major technical equipment. At present, high-end bearings such as sedans, high-speed rail, wind power, and precision machine tool spindle bearings have always been the soft underbelly of China's bearing industry and have long depended on imports. As the development of China's bearing industry can not keep up, it has strongly promoted the import of bearings. For example, in the large-scale development of high-speed railways, the bearings for EMUs with a speed of over 200 kilometers per hour are all imported. At present, the domestic can meet only about 160 kilometers of locomotive bearings. Relevant sources said that although a small number of domestic enterprises can manufacture motor-vehicle bearings with a speed of 200 kilometers per hour, the relevant procurement departments will still use imported components. The outlook for high-end bearings in China is worrisome.
Since 33% of the anion charges are due to hydroxy ions the basicity is 33% (but in tanning jargon it is known as 33% reduced). Products with higher basicities, e.g. 42% or 50% may be obtained by the addition of sodium carbonate, these are often used in combination with Sodium Formate. The sodium sulfate is often left in the technical product since it is inert with respect to the tanning process. It is important to fully reduce the hexavalent chromium to trivalent since the hexavalent is more likely to cause health problems for tanners and leather consumers.