Regarding the selection of dimethyl sulfate pumps

When selecting a dimethyl sulfate pump, it is necessary to choose materials resistant to corrosion, such as stainless steel and fluoroplastics, and to use mechanically sealed or magnetic seals with good sealing properties to prevent leaks. At the same time, motors with explosion-proof features should be used to ensure safe production. Appropriate leak detection and alarm devices should also be installed, along with proper ventilation and protective measures. .

By choosing a magnetic pump or a shielded pump, leakage-free and safe operation can be achieved.

Let’s first look at the chemical properties of dimethyl sulfate: it decomposes rapidly in the presence of alkalis, and hydrolyzes when exposed to water or moisture. Its decomposition is slow in cold water, producing methyl bisulfate and methanol; as the temperature rises, the decomposition accelerates, and at 50°C, dimethyl sulfate vapor is formed, which then hydrolyzes into sulfuric acid and methanol. The presence of alkalis in the system can be ignored; to obtain pure dimethyl sulfate, it is necessary to prevent water vapor from entering or coming into contact with it. Therefore, the connection to the pump should be as short as possible, and various fittings should be used as little as possible to avoid the entry of water vapor. As for the principles for selecting pumps: considering durability and stability, metal pumps should be used whenever possible instead of plastic pumps; plastic pumps should be considered only when the cost of metal pumps is too high. As long as dimethyl sulfate is not exposed to water, using stainless steel for the pump is the optimal solution. If systematic sealing is not possible, or if mixing with water is required during use, plastic pumps should be employed. Since dimethyl sulfate is also a plastic-modifying material, it can be used in the polymer industry for the synthesis of polysulfone monomers. Therefore, the use of polymer or PP (polypropylene) materials as materials for components that handle flowing fluids should be avoided as much as possible; it is safer to use plastic pumps made of F46 material. Finally, we come to the choice of pump type. Magnetic pumps or shielded pumps, which have no moving parts that can cause leaks, are the best options. Given the variable quality of shielded pump technology in China and their high prices, magnetic pumps are recommended. Attention! ! ! No matter which pump is used, be sure not to use rubber seals! Including the sealing of your pipelines! An F4 gasket can be used as a substitute. I hope this can help you. This is Anhui Aochuang Pump Industry Technology Co., Ltd. Wishing you a good morning, good afternoon, and good evening!

A shielded pump is more suitable for dimethyl sulfate.

Isn’t it precisely because of the uneven quality of shielding pump technology in China and their high prices that we recommend the use of magnetic pumps? When choosing a pump, it’s necessary to consider whether the user will be able to accept it. As equipment manufacturers, we not only need to take into account the suitability of the pump but also the user’s level of equipment management expertise, budget, maintenance costs, and other factors.