EXPERIMENTAL PROCEDURES
Materials. AOS acid was obtained from Zhejiang Cleaned
Chemical Industry Limited Company (Hangzhou, P.R.
China). AOS acid was collected directly from the falling film
before digestion, immediately frozen in dry ice, and transferred
to a freezer for storage until use. Benzene and other
reagents were of analytical grade. A Krüss K-10T surface tensiometer
was used for facial tension measurements (Krüss
GmbH, Hamburg, Germany); a Waters platform ZMD-4000
mass spectrograph was used for mass analysis (Waters, Milford,
MA); a TU-1901 spectrophotometer was used for ultraviolet
spectrum analysis (Beijing Purkinje General Co. Ltd.,
Beijing, P.R. China); an FTLA 2000-104 infrared spectrophotometer
was used for infrared analysis (ABB Inc., Canada);
and a DRX-500 nuclear magnetic resonance (NMR) spectrometer
was used for 1H NMR and 13C NMR analyses
(Bruker, Russ, Germany).
Analysis. Surface tension measurements were made by using
the Wilhelmy plate technique. The Wilhelmy plate (sandblasted
platinum, ca. 5-cm perimeter) was hung from the arm
of a Bethlehem dial-type torsion balance with solutions im-mersed in a constant-temperature bath at the desired temperature,
20 ± 1°C. The instrument was calibrated against quartzcondensed
water each day that measurements were taken. Sets
of measurements were taken at 30-min intervals until no significant
change occurred. The surfactant charge of the anionic
materials was determined by collision-induced dissociation
titration using Hyamine® 1622. The iodine values of both the
raw materials and products were determined by ISO Standard
3961:1989 (7).
Preparation of dialkylaryl disulfonates. (i) Preparation of
DTBDS. C14 AOS acid (276 g, 1.0 mol) was added along with
benzene (39.0 g. 0.5 mol) to a 1000-mL stainless-steel pressure
reactor equipped with a stirrer, cooling coil, and thermocouple
temperature controller. The charge was gradually
heated to 150°C, and this temperature was maintained for 5
h. After the reaction was completed, the product was cooled,
neutralized using 30% (w/w) sodium hydroxide, and dried
at 80°C in a vacuum system.
(ii) Preparation of DTMNDS. C14 AOS acid (276 g, 1.0 mol)
was added along with a-methylnaphthalene (71.0 g, 0.5 mol)
to a 500-mL round-bottomed flask equipped with a stirrer
and thermocouple temperature controller; the remainder of
the process was the same as that for the synthesis of DTBDS.
高分!!!谁能帮我把这段话翻译成中文,不要机器翻译!翻译
高分!!!谁能帮我把这段话翻译成中文,不要机器翻译!翻译 悬赏分:20 - 离问题结束还有 14 天 20 小时 EXPERIMENTAL PROCEDURES Materials. AOS acid was obtained from Zhejiang Cleaned Chemical Industry Limited Company (Hangzhou, P.R.China). AOS acid was collected directly from the fallin...
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谁可以帮我翻译一段话 把他翻译成英文 不要机器翻译 谢谢
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