Low-temperature oily sludge demulsifier and preparation method thereof

Abstract

The invention discloses a low-temperature oily sludge demulsifier and a preparation method thereof. The low-temperature oily sludge demulsifier comprises the following components in parts by weight: 5 to 23 parts of N-acyl-N-methyl glucamine, 4 to 19 parts of alkyl polyoxyethylene ether, 1 to 5 parts of an inorganic salt, and 53 to 90 parts of water. The preparation method comprises the following steps: uniformly mixing N-acyl-N-methyl glucamine, the alkyl polyoxyethylene ether, the inorganic salt and the water to obtain the low-temperature oily sludge demulsifier. The demulsifier is good in low-temperature demulsification effect, wide in using temperature range and high in oil recovery rate, and has the advantages of low production cost, environment friendliness, simple and convenient preparation method, wide application range and the like. The oily sludge demulsifier disclosed by the invention can be applied to harmless treatment of oily sludge, floating slag and active sludge at the bottom of a tank, and can also be applied to the treatment of various types of oil-containing sludge generated in oil exploitation and by storage and transport enterprises.

Description

technical field [0001] The invention relates to an oil sludge demulsifier and a preparation method thereof, in particular to a low-temperature oil sludge demulsifier and a preparation method thereof. Background technique [0002] A large amount of black solid and semi-solid waste containing oil will be produced in the process of oil extraction, gathering and transportation, refining and oily sewage treatment, which is called oil sludge, and its main components are oil, mud and water. The size of solid particles in oil sludge can range from less than microns to several inches, most of which are between 1 and 100 microns. The composition of oil depends on the type of crude oil, refinery structure and operating conditions. The composition of sludge may change over time. According to statistics, China's annual output of oil sludge is nearly 3 million tons, which contains about 600,000 tons of crude oil resources. In addition to a large amount of aged crude oil, waxy, and colloi...

AI Technical Summary

Problems solved by technology

The process is relatively complicated, and the oil recovery rate needs to be improved

CN102492460A discloses a preparation method and application of a crude oil low-temperature demulsifier. The method prepares a demulsifier through polyethylene polyamine polyether and alkylphenol polyether. Demulsification and dehydration speed, the dehydration rate is over 90%, but the treatment of oily sludge with high solid content is not ideal, and there is a lack of specific data on oil recovery rate