2results about How to "Process environment friendly" patented technology

This invention relates to the field of harmless treatment technology for oily sludge, specifically to a method for preparing carbon quantum dots from oily sludge. Conventional methods for preparing carbon quantum dots from oily sludge have limitations in yield and fluorescence intensity. To address these issues, this invention provides a method for preparing carbon quantum dots from oily sludge. Considering the complex composition of oily sludge, this invention designs a multi-stage purification process chain of "ultrasonic extraction—water washing—Soxhlet extraction—acidification treatment." Each step works synergistically, purifying the sludge step by step to ultimately obtain a high-purity refined organic carbon source. The refined organic carbon source removes impurities through gentle solvent extraction and acid washing, maximizing the preservation of the organic carbon source's chemical activity and structural integrity. In the hydrothermal reaction, it can be effectively converted into carbon quantum dots, avoiding carbon source loss or activity reduction due to over-processing, thus further improving the yield and fluorescence intensity of carbon quantum dots.

The application belongs to the field of green manufacturing, and discloses a preparation method of a pyridazine compound, comprising the following steps: (1) adding an enzyme catalyst, a bio-based furan and a co-substrate into a buffer solution to react, and removing cells after the reaction; (2) adding hydrogen peroxide or an oxidase and a titanium-silicon molecular sieve to react, and removing the titanium-silicon molecular sieve after the reaction; (3) slowly adding hydrazine under stirring at 0-60 DEG C to obtain the pyridazine compound after the reaction; the enzyme catalyst is at least one of the following: an alcohol dehydrogenase / glucose dehydrogenase double enzyme system, an alcohol dehydrogenase / formate dehydrogenase double enzyme system and a recombinant bacterium co-expressing one or both of the above two double enzyme systems. The application has the advantages of high selectivity, mild reaction conditions, environmental friendliness, fast reaction speed and no need for intermediate separation and purification.