XIAMEN JU SHENG MECHANICAL ENGINEERING CO., LTD. Patent applications |
Patent application number | Title | Published |
20140213829 | METHOD FOR PRODUCING METHOXYPOLYETHYLENE GLYCOLS - A method for producing methoxypolyethylene glycols includes the following steps: (1) after the reactor is washed by water, nitrogen is filled in the reactor to elevate the pressure and then the reactor is vacuumized to completely remove water and reduce the oxygen content in the reactor; (2) nitrogen is filled in the rector and pressure is elevated, and then methanol and sodium methoxide as the catalyst in methanol is added into the reactor, and then warming up; (3) ethylene oxide is added into the reactor at 800˜1200 kg/h to process the pre-reaction; (4) ethylene oxide is added into the reactor at 8000˜12000 kg/h to process the reaction after methanol and ethylene oxide in the reactor are completely reacted; (5) the pressure of reaction product is reduced and pH of reaction product is adjusted to 5˜7 after the reaction is finished, and then the reaction product is transferred to the tank yard. | 07-31-2014 |
20140212342 | DEVICE FOR PRODUCING ETHOXYLATION DERIVATIVES - A device for producing ethoxylation derivatives includes an assistant circulation loop with lower starting quantity is added on the base of the main circulation loop, and the assistant circulation pump is started first when slight chain initial dose is added with low flow rate of the ethylene oxide and high growth rate of polyreation; when the amount of reactant gets to the starting quantity of the main circulation pump, the main circulation loop is started with high flow rate of ethylene oxide. The two circulation loops cooperate with each other shorten reaction time and high yield in one batch; a pre-reaction cavity with smaller inner diameter than that of the main body of the reactor is extended from the bottom of the main body of the device, so that lower chain initial dose can start the assistant circulation pump, and then start the assistant circulation loop. | 07-31-2014 |