2results about How to "Improve demulsification efficiency" patented technology

This invention discloses a novel cross-linked polymeric demulsifier and its preparation method. Specifically, it uses a polyoxyethylene / polyoxypropylene block polyether demulsifier as a base, which undergoes esterification of terminal hydroxyl groups, followed by a Michael addition reaction with ethylene amine to obtain the cross-linked polymeric demulsifier. This novel cross-linked polymeric demulsifier exhibits low organochlorine residue, a simple production process, mild reaction conditions, controllable molecular weight, and uniform molecular weight distribution. In application, it offers significant advantages such as high demulsification efficiency, rapid demulsification speed, low dosage, and low demulsification temperature, as well as broad applicability to various crude oil emulsions.

The present application relates to a kind of demulsifiers and its preparation method and application.The preparation method includes the following steps: (1) glycerol and p-hydroxy isophthalic acid are mixed, esterification is carried out, and branched prepolymer is obtained;(2) branched prepolymer is mixed with L-arginine, and amide reaction is carried out, and branched body is obtained;(3) branched body is mixed with carboxyl-terminated agent, and amide reaction is carried out, and the demulsifier is obtained.The demulsifier prepared by the specific preparation method can realize the efficient demulsification of high-salt crude oil emulsion, has the advantages of low toxicity, high demulsification efficiency, wide pH range, biodegradable.