Polyether demulsifier for crude oil emulsion and preparation method thereof

• Main Authors: SONG FANYONG, LI TIANYUAN, WANG JIANING, FU XIAOWEN, ZHANG WEN, HUANG YUJIE
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2024
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The invention relates to the technical field of demulsifiers, in particular to a polyether demulsifier for crude oil emulsion and a preparation method of the polyether demulsifier, and the polyether demulsifier comprises 1-10 parts by weight of propylene glycol block polyether, 1-10 parts by weight of ethylenediamine polyoxyethylene polyoxypropylene ether, 1-10 parts by weight of alkylphenol polyoxyethylene ether sodium carboxylate and 20-50 parts by weight of water. The propylene glycol block polyether, the ethylenediamine polyoxyethylene polyoxypropylene ether and the alkylphenol polyoxyethylene ether sodium carboxylate are introduced into the polyether demulsifier, so that the water solubility and the salt tolerance of the polyether demulsifier are improved. 本发明涉及破乳剂技术领域，具体涉及一种用于原油乳状液的聚醚类破乳剂及其制备方法，聚醚类破乳剂包括丙二醇嵌段聚醚1-10重量份、乙二胺聚氧乙烯聚氧丙烯醚1-10重量份、烷基酚聚氧乙烯醚羧酸钠1-10重量份、水20-50重量份。本发明将丙二醇嵌段聚醚、乙二胺聚氧乙烯聚氧丙烯醚和烷基酚聚氧乙烯醚羧酸钠引入聚醚类破乳剂中，提高了聚醚类破乳剂的水溶性与耐盐性。