4results about How to "Avoid Polymerization" patented technology

This application provides a fuel precursor, a fuel, and a method for preparing the same. The method for preparing the fuel precursor includes: mixing furanol, an organic extractant, water, and an acidic molecular sieve catalyst to obtain a mixture; heating the mixture under an inert atmosphere to obtain the fuel precursor. As the reaction proceeds, furanol continuously diffuses into the aqueous phase and reacts, while the organic extractant can promptly extract the target product, the fuel precursor, into the organic phase, avoiding further polymerization and improving the yield of the fuel precursor; furthermore, the two-phase system facilitates the separation and purification of the fuel precursor.

This utility model relates to the field of acrolein tail gas recovery technology, and discloses an acrolein tail gas recovery system, including an acrolein storage tank and an absorption tower. The acrolein storage tank is used to store acrolein tail gas. The absorption tower is connected to the acrolein storage tank through a connecting pipe, and an induced draft fan is installed on the connecting pipe to transport the acrolein tail gas from the acrolein storage tank to the absorption tower. Process absorption water is introduced into the absorption tower to recover acrolein from the acrolein tail gas. This acrolein tail gas recovery system can significantly reduce the probability of acrolein tail gas polymerization in the connecting pipe by using the induced draft fan, avoiding blockage of the connecting pipe. The process absorption water introduced into the absorption tower absorbs the acrolein in the acrolein tail gas, preventing polymerization reaction and avoiding blockage of the absorption tower. This reduces the cost of downtime to replace blocked connecting pipes or clean the absorption tower. At the same time, acrolein can be purified and recovered as a product, realizing the recycling of acrolein.

The application relates to a cyclone pre-purification quenching tower device for acrylonitrile recovery, and belongs to the technical field of acrylonitrile recovery. The core lies in that a first dust removal and cooling mechanism is arranged in a cyclone area; a filler, a second cooling mechanism, a third temperature adjusting mechanism and a demisting mechanism are sequentially arranged in a cylinder body from bottom to top; and a dynamic water seal mechanism is arranged in a conical area at the bottom of a shell. After high-temperature dust-containing gas is pretreated by the first mechanism in the cyclone area, the high-temperature dust-containing gas enters the cylinder body and is deeply purified by the second mechanism; the third temperature adjusting mechanism controls heat transfer by spraying a cooling medium to the inner wall of the cylinder body to prevent polymerization; the demisting mechanism efficiently recovers liquid droplets entrained by the airflow; and the dynamic water seal mechanism at the bottom forms a water seal to suppress dust. The application organically combines the functions of cyclone dust removal, multi-stage cooling, precise temperature adjustment and secondary entrainment prevention, significantly improves the recovery efficiency of acrylonitrile and the gas purification effect, and simultaneously has the advantages of anti-blocking, easy maintenance and stable operation.

The utility model discloses a kind of anti-clogging continuous glacial acetic acid rectification purification device, including sequentially connected raw material tank, preheater, rectifying tower, the outside of the raw material tank is equipped with first heat-preservation jacket, the outside of the rectifying tower is equipped with second heat-preservation jacket, the pipeline between the rectifying tower and the preheater is equipped with polymerization inhibitor injection port;The gas phase outlet of the top of the rectifying tower is connected with main condenser, the main condenser connects reflux tank, the reflux tank is connected product cooler by reflux pump, and the product cooler is connected with product storage tank;The liquid phase outlet of the bottom of the rectifying tower is connected with reboiler, and the reboiler is also connected with the rectifying tower, and the pipeline between the liquid phase outlet and the reboiler is also equipped with recovery tank.The utility model can present glacial acetic acid's high-purity continuous stable production, solve or greatly alleviate crystallization plugging problem in rectification process.