3results about How to "Promote esterification reaction" patented technology

The application provides a method for dynamically regulating alcohol content to enhance the flavor of solid vinegar, comprising the following steps: S1, liquefaction; S2, saccharification; S3, alcohol fermentation; S4, solid-state layered fermentation; and S5, finished product preparation. The vinegar preparation method has the advantages that the fermentation performance is improved, the fermentation period is shortened, the conversion rate of acetic acid is improved, the biomass of bacteria is increased, the growth of acetic acid bacteria is as good as possible, the rate of acetic acid fermentation is improved, the period of acetic acid fermentation is shortened, the flavor of liquid-state fermented vinegar is improved, the irritation of solid-state fermented vinegar is reduced, and the method has a good market application prospect.

This utility model discloses a polyester esterification temperature control device, including a reaction vessel and a motor. The reaction vessel is equipped with a stirring rod connected to the motor. The reaction vessel is connected to a temperature sensing component and a temperature control component. The temperature sensing component includes a shell mounted on the reaction vessel, with a thermal expansion element disposed inside the shell. The thermal expansion element is slidably connected to a speed regulating element. The shell is equipped with a proximity switch that can cooperate with the thermal expansion element. The temperature control component includes a water pipe disposed on the outer wall of the reaction vessel, with a valve connected to a high-temperature pipe and a low-temperature pipe. The valve cooperates with the proximity switch. This utility model can achieve uniform temperature distribution inside the reaction vessel during the polyester esterification process, reduce the heating temperature of the reaction vessel, and remove heat from the reaction vessel, thereby cooling the reaction vessel and facilitating a better esterification reaction.

The application discloses a kind of di (propyl-2-alkenyl) furan-2, 5-dicarboxylic acid ester and preparation method thereof, it is related to biomass-based organic synthesis method technical field.The method with 2, 5-furan dicarboxylic acid as base material, by esterification reaction under the action of inorganic metal catalyst, will be grafted in 2, 5-furan dicarboxylic acid on allyl, obtains di (propyl-2-alkenyl) furan-2, 5-dicarboxylic acid ester.Compared with traditional synthesis method, the required reaction condition is relatively mild, without high temperature and high pressure environment, not only reduce energy consumption, also reduce operating risk and equipment cost.Mild reaction condition is also more conducive to keeping the activity and selectivity of catalyst, improves reaction efficiency.The obtained product is high in purity, without complex post-processing step can be directly used in subsequent application or further chemical conversion, improves overall production efficiency.The application provides a new idea for 2, 5-furan dicarboxylic acid and other biomass materials to realize high value-added utilization.