3results about How to "Fast demulsification" patented technology

The present application relates to a kind of demulsifier for oily wastewater and its preparation method, belong to oily wastewater treatment technical field.The raw material component of the demulsifier includes 15-25wt% iron salt, 10-20wt% aluminum salt, 5-10wt% auxiliary salt and the balance deionized water;Auxiliary salt is the complex system of magnesium salt and zirconium salt;The demulsifier is complexed into intermediate by its raw material component, then polymerized at the temperature of ≤30 ℃.The synergistic effect of iron ion, aluminum ion, magnesium ion and zirconium ion, the prepared demulsifier keeps the oil removal rate at 95% or more in the range of temperature 5-40 ℃, salinity 0.5%-5%, pH 4.0-10.0, COD removal rate is more than 85%, and the performance stability is significantly better than traditional demulsifier, with high demulsification efficiency, low sludge yield, strong adaptability, green environmental protection, low cost and wide application scenarios, with high market value.

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 provides a kind of lignin quaternary ammonium salt cation emulsifier and its preparation method, emulsified asphalt and its application, belong to fine chemical field.The preparation method of lignin quaternary ammonium salt cation emulsifier provided by the present application includes the following steps: mixing trimethylamine hydrochloride, epichlorohydrin and water, ring-opening reaction is carried out under alkaline condition, and intermediate is obtained;The intermediate is mixed with sulfomethylated lignin, and the reaction is carried out to obtain lignin quaternary ammonium salt cation emulsifier.The present application uses lignin as raw material to prepare lignin quaternary ammonium salt cation emulsifier, raw material cost is low, and the lignin quaternary ammonium salt cation emulsifier is fast, and dispersion performance is good, and durability is good, can be widely used in the preparation of emulsified asphalt.