2results about How to "Efficient synthesis process" patented technology

The invention relates to a bicyclo [1.1. 0] butanone compound and a synthesis method thereof, the structural formula of the compound is as follows: # imgabs0 # formula (I), R is any one of phenyl, p-tolyl, p-ethyl phenyl, p-isopropyl phenyl, p-tert-butylphenyl, p-fluorophenyl, 2-methylphenyl, 3-methylphenyl, 3, 5-dimethylphenyl, 1-naphthyl, and 4-trimethylsilyl, and the structural formula of the compound is as follows: # imgabs0 # formula (I), and in the formula (I), R is any one of phenyl, p-tolyl, p-ethyl phenyl, p-isopropyl phenyl, p-tert-butylphenyl, p-fluorophenyl, 2-methylphenyl, 3-methylphenyl, 3, 5-dimethylphenyl, 1-naphthyl, and 4-trimethylsilyl. The method is low in raw material cost and easy to obtain, simple and convenient in experimental operation, efficient in synthesis process and suitable for large-scale production. By using cheap and easily available reagents such as 4-dimethylaminopyridine, acetic anhydride, sodium hydride and the like, the target bicyclo [1.1. 0] butanone compound can be obtained only through three-step reaction, and gram-scale production can be realized.

This invention provides a biodegradable modified coating, a modified knot plugging agent for fracturing, and their preparation method, belonging to the field of tertiary oil recovery technology. Specifically, the dense cross-linked network structure generated by the Schiff base reaction between gelatin (GL) and glutaraldehyde (GD) serves as a coating material for the knot plugging agent, providing it with high strength and stability without sacrificing its biodegradability. Furthermore, by changing the reaction conditions (immersion time and curing time) during the preparation of the coated knot plugging agent, a series of knot plugging agents adaptable to different reservoir temperatures and degradation cycles can be obtained to meet the complex conditions in perforation cluster plugging processes, thus broadening its application range.