Search Result

Journals

Publication Years

Keywords

Please wait a minute...

For Selected:

Download Citations
EndNote Ris BibTeX

Toggle Thumbnails

Select

Wettability of the Organic Bentonite Modified by MDFFA Mixed With Other Alkyl Quaternary Ammonnium Salts

HAN Fan-zhen, GAO Mang-lai*, LIU Yong-bin

Abstract （337）

PDF （2947KB）（335）

Washburn method was applied to investigate on the wettability of the organic bentonite modified by molecular deposition filming flooding agent (MDFFA) mixed with tetraethyl ammonium bromide ［(Et) ₄NB］, dodecyl trimethyl ammonium bromide (DTAB) or hexadecyl trimethyl ammonium bromide (CTAB). The results show that the organic bentonite absorbed MDFFA is more hydrophilic than that of organic bentonite absorbed (Et) ₄NB,DTAB,CTAB, then the oil wettability of organic bentonite absorbed MDFFA is lower than others. For the solution of MDFFA mixed with (Et) ₄NB,DTAB or CTAB, with the increase of MDFFA volume proportion the organic bentonite is more hydrophilic and the oil wettability is lower, especially for the organic bentonite treated by the solution of MDFFA mixed with (Et) ₄NB, when (Et) ₄NB mixed with a little MDFFA the organic bentonite is more hydrophilic than that of absorbed (Et) ₄NB and the oil wettability is lower obviously.

2008, 21 (1): 21-24.

Select

The Aqueous Solution Property of MDFFA/SDS Mixed System

YANG Li, GAO Mang-lai, LIU Hong-sheng, HAN Fan-zhen

Abstract （408）

PDF （1154KB）（379）

Critical micelle concentration (cmc) of molecular deposition filming flooding agent (MDFFA) and sodium dodecyl sulfate (SDS) mixed systems were determined by conductivity method, and the effect of MDFFA on the precipitating behavior of anionic surfactant and multivalent cation was studied by means of light transmission measurement. The results show that MDFFA can decrease the cmc of SDS, the cmc decreases with the increasing of the concentration of MDFFA. With the increasing of temperature from 25 ℃ to 50 ℃, the cmc of 2 mmol/L MDFFA/SDS mixed system decreased. The cmcof 2 mmol/L MDFFA/SDS decreased with the increasing of concentration of NaCl. The precipitating behavior did not happen when MDFFA and SDS were mixed. MDFFA can restrain the precipitating behavior of anionic surfactant and Ca ²⁺. The capability of MDFFA restrain the precipitating behavior is better than NaCl, NaOH and NaHCO ₃.

2007, 20 (4): 33-37.