Self-assembly and rheological behavior of chloramphenicol-based poly(ester ether)urethanes

Zaltariov, Mirela‐Fernanda; Filip, Daniela; Macocinschi, Doina; Ibănescu, Constanţa; Danu, Maricel; Săcărescu, Liviu

doi:10.1007/s10965-021-02545-7

Cited by 2 publications

(1 citation statement)

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“…The first inflection point is around 1 mg/L, and the second inflection point is around 100 mg/L. The second inflection point is generally considered to be the CMC (critical micellization concentration) value of the polyether. , Before the polyether concentration reached the first inflection point, surface tension drops rapidly with the increase of the concentration of polyether, polyether concentration reached between the two inflection point, surface tension is still a certain velocity decreased, but the decline is reduced, when the concentration of polyether more than a second after the inflection point, further reducing declining rate of surface tension, at this time, with the increase of concentration of polyether surface tension slow decline.…”

Section: Results and Discussionmentioning

confidence: 99%

Synthesis and Study of a New Type of Fluorinated Polyether Demulsifier for Heavy Oil Emulsion Demulsification

et al. 2021

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To solve the problem of heavy oil demulsification difficulties in Liaohe Oilfield, phenolamine resin initiator was synthesized from p-trifluoromethyl phenol, and then FB series fluorinated polyether demulsifiers were synthesized by block polymerization using ethylene oxide (EO) and propylene oxide (PO) as raw materials. The demulsifiers were characterized by infrared spectroscopy, cloud point, hydrophilic–lipophilic balance (HLB) value, and surface tension. The demulsifying and dehydrating properties were tested by demulsifying and dehydrating experiments, the demulsification mechanism was analyzed by the microscopic demulsification process test, and the influence of demulsifier addition and demulsifying temperature on demulsifying performance was also studied. The results showed that under the condition of the optimum demulsification temperature of 60 °C and the optimum demulsifier dosage of 100 mg/L, the water removal (%) of fluorinated polyether demulsifier of FB 4 was the highest, and the overall water removal (%) of 50 mL crude oil emulsion in Liaohe Oilfield reached 90.33% within 2 h, which was better than the current demulsifier used in Liaohe crude oil.

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Section: Results and Discussionmentioning

confidence: 99%