Demulsifiers

Demulsifiers

 

in petroleum production, substances aiding the destruction of emulsions formed from petroleum and water. Upon introducing demulsifiers into an emulsion, they are adsorbed on the surface layer of particles of the dispersed phase (so-called drops), forming around the drops a new layer saturated with demulsifier and of lower mechanical strength. Owing to this, on collision of the drops their coalescence and also the destruction of the emulsion are facilitated. In the USSR the theory of emulsion destruction has been worked out by the school of Academician P. A. Rebinder and in the USA, by I. Langmuir.

The main user of demulsifiers (consuming tens of thousands of tons a year) is the petroleum industry, in petroleum refineries, where demulsifiers are used to dewater and desalt petroleum. In destroying emulsions of the “water in petroleum” type, the demulsifier consumption varies from a few tens to a few hundreds of grams per ton of emulsion. Demulsifiers for destroying “water in petroleum” type emulsions are nonionic surface-active agents whose synthesis is based on ethylene oxide and propylene oxide.

A. I. ARUTIUNOV

References in periodicals archive ?
According to a report,"Oilfield Chemicals Market Analysis By Product (Inhibitors, Demulsifiers, Rheology Modifiers, Friction Reducers, Biocides, Surfactants, Foamers), By Application, By Location, And Segment Forecasts, 2018 - 2025", published by Grand View Research, Inc.,
Key solutions include corrosion inhibitors, demulsifiers, H2S scavengers, paraffin control products, surfactants, scale inhibitors, biocides and other specialty products.
This research study titled " Oilfield Production Chemicals Market " Get Report Sample Copy@ https://www.mrrse.com/sample/18050 On the back of surged shale gas exploration activities besides reasonable traction in deep water drilling expeditions, the global market for oilfield chemicals is likely to remain lucrative in the coming years, owing to their large scale applications as corrosion inhibitors, demulsifiers, and defoamers amongst a range of other applications.
It is blended with additives such as antioxidants, extreme pressure anti-wear agents, rust inhibitors, foaming agents, demulsifiers and compounding agents.
Viscosity index improver (VII) [1, 2], pour-point depressants (PPD) [3, 4], anti-wear (AW) [5, 6], antioxidant [7], detergent-dispersant [8], emulsifiers, demulsifiers etc.
Other non-metallic additives include fluidizers, friction modifiers, antioxidants, demulsifiers, and corrosion inhibitors [24].
Based on this concept high-performance chemicals were obtained that were useful for the production, treatment, and transportation of petroleum as well as for the production of corrosion inhibitors, emulsifiers, demulsifiers, the biologically active substances, and so on [17-19].
It is non-corrosive, environmentally friendly and economically competitive as it replaces or minimizes the currently used chemicals (corrosion and scaling inhibitors, demulsifiers, viscosity improvers, etc.).
Until now, the most common way of separating water from crude oil is by using chemical demulsifiers [1].
KNPC has coordinated and worked with the authority specialized in radiations in the country on measuring radiation rates in the demulsifiers of heavy crude reactors, where the fire broke out, Al-Asousi, who is also KNPC's Deputy CEO for Support Services, noted.
Thermodynamic hydrate inhibitors, low-dosage hydrate inhibitors (LDHI), defoamers, asphaltene inhibitors, paraffin inhibitors, scale inhibitors, H2S scavengers, chemical demulsifiers and drag-reducing agents fall under chemical solutions.
The British author explains the chemical foundations for water and gas control, scale control, asphaltene control, acid stimulation, sand control, corrosion control during production, gas hydrate control, wax control, demulsifiers, foam control, flocculants, biocides, scavengers, and drag-reducing agents.