Crude oil desalting agent and preparation method thereof

Abstract

The invention discloses a crude oil desalting agent and a preparation method thereof. The desalting agent is composed of the following components in parts by weight: 6 to 10 parts of polyethylene polyamine polyoxypropylene polyoxyethylene ether, 4 to 8 parts of acid anhydrides, 6 to 10 parts of acrylate, 1 to 2 parts of asphaltene dispersant, 6 to 8 parts of organic phosphonic carboxylic acid, 6 to 8 parts of methacrylic acid, 1 to 3 parts of surfactant, 6 to 8 parts of alcohol ethoxylates, 5 to 7 parts of acrylamide, 2 to 3 parts of inorganic salt aid, 4 to 8 parts of solvent, and 1 to 2 parts of crosslinking agent. The desalting agent has a good demulsifying, desalting, and dehydrating performance, and is especially suitable for demulsification, desalting, and dehydration of thick oil with a high content of colloid and asphaltene.

Description

technical field [0001] The invention relates to the technical field of crude oil pretreatment, in particular to a crude oil desalting agent and a preparation method thereof. Background technique [0002] Crude oil electric desalting is the first process of crude oil processing, and its purpose is to remove salt, water and other impurities from crude oil. The demulsifier plays a key role in the oil-water demulsification process of electrical desalination. It destroys the emulsified film surrounding the water droplet and prevents the formation of the external emulsified film of the water droplet. At present, general conventional demulsifiers have the problem of specificity for crude oil. When the properties of crude oil change, especially for heavy oil with high colloid and asphaltene content, the demulsification and desalination effect of conventional demulsifiers is poor, resulting in the desalination of crude oil after electrical desalting. The salt content exceeds the sta...

AI Technical Summary

Problems solved by technology

At present, general conventional demulsifiers have the problem of specificity for crude oil. When the properties of crude oil change, especially for heavy oil with high colloid and asphaltene content, the demulsification and desalination effect of conventional demulsifiers is poor, resulting in the desalination of crude oil after electrical desalting. The salt content exceeds the standard, resulting in severe corrosion of the condensation cooling system at the top of the distillation unit, fouling of the heating furnace tube and heat exchange system, and deactivation of the catalyst in the secondary processing unit, etc.