Lub mechanism ntawm cruderoj demulsifiersyog raws li theem inversion-reverse deformation txoj kev xav. Tom qab ntxiv cov demulsifier, ib theem inversion tshwm sim, tsim cov surfactants uas tsim cov hom emulsion rau qhov uas tsim los ntawm emulsifier (rov qab demulsifier). Cov demulsifiers cuam tshuam nrog hydrophobic emulsifiers los tsim cov complexes, yog li neutralizing lub emulsifying zog. Lwm cov txheej txheem yog interfacial zaj duab xis rupture los ntawm kev sib tsoo. Nyob rau hauv cua sov los yog agitation, demulsifiers nquag sib tsoo nrog lub interfacial zaj duab xis ntawm lub emulsion-txawm yog adsorbing rau nws los yog tshem tawm ib co surfactant molecules-uas destabilizes zaj duab xis, ua rau flocculation, coalescence, thiab thaum kawg demulsification.
Cov roj Crude emulsions feem ntau tshwm sim thaum cov roj tsim thiab ua kom zoo. Feem ntau ntawm lub ntiaj teb cov roj crude yog tsim nyob rau hauv ib daim ntawv emulsified. Ib qho emulsion muaj tsawg kawg yog ob lub immiscible kua, qhov twg ib tug yog dispersed raws li zoo heev droplets (kwv yees li 1 hli inch) tshem tawm nyob rau hauv lwm yam.
Feem ntau, ib qho ntawm cov kua no yog dej, thiab lwm yam yog roj. Cov roj tuaj yeem ua tau zoo nyob hauv dej, tsim cov roj-hauv-dej (O / W) emulsion, qhov twg dej yog qhov txuas mus ntxiv thiab roj yog qhov tawg. Hloov pauv, yog tias cov roj yog cov theem tas mus li thiab dej tawg, nws tsim cov dej hauv cov roj (W / O) emulsion. Feem ntau cov roj crude emulsions yog rau hom tom kawg.
Nyob rau hauv xyoo tas los no, kev tshawb fawb ntawm crude roj demulsification mechanisms tau tsom mus rau cov ncauj lus kom ntxaws soj ntsuam ntawm droplet coalescence thiab qhov cuam tshuam ntawm demulsifiers ntawm interfacial rheology. Txawm li cas los xij, vim qhov nyuaj ntawm demulsifier-emulsion kev sib cuam tshuam, txawm hais tias kev tshawb fawb dav dav, tseem tsis tau muaj kev sib koom ua ke ntawm cov txheej txheem demulsification.
Muaj ntau qhov kev lees paub dav dav suav nrog:
1.Molecule tshem tawm: Demulsifier molecules hloov emulsifiers ntawm lub interface, destabilizing emulsion.
2.Wrinkle deformation: Cov kev tshawb fawb me me pom tau tias W / O emulsions muaj ob lossis ntau txheej dej sib cais los ntawm cov roj nplhaib. Nyob rau hauv cov cua kub, agitation, thiab demulsifier kev txiav txim, cov khaubncaws sab nraud povtseg interconnect, ua rau poob coalescence.
Tsis tas li ntawd, kev tshawb fawb hauv tsev ntawm O / W emulsion systems qhia tias qhov zoo tshaj plaws demulsifier yuav tsum ua tau raws li cov hauv qab no: muaj zog nto kev ua haujlwm, zoo wettability, txaus flocculation muaj peev xwm, thiab kev ua tau zoo coalescence.
Demulsifiers tuaj yeem raug cais raws li hom surfactant:
•Anionic demulsifiers: suav nrog carboxylates, sulfonates, thiab polyoxyethylene fatty sulfates. Lawv tsis tshua muaj txiaj ntsig, xav tau ntau npaum li cas, thiab nkag siab rau electrolytes.
•Cationic demulsifiers: Feem ntau quaternary ammonium ntsev, siv tau rau cov roj teeb tab sis tsis haum rau cov roj hnyav lossis hnub nyoog.
•Nonionic demulsifiers: suav nrog block polyethers pib los ntawm amines lossis cawv, alkylphenol resin block polyethers, phenol-amine resin block polyethers, silicone-based demulsifiers, ultra-siab molecular hnyav demulsifiers, polyphosphates, hloov block polyethers, thiab zwitterionic demulsifiers (cov roj raws li demulsifiers).
Post lub sij hawm: Aug-22-2025