Among the twelve samples investigated, the extracted oils from extractions alone and combined processes mainly contained aliphatics, including long-chain n-alkanes and 1-alkenes, and a small amount of aromatics, alcohol, phenol and pyrrolidinone.
Light hydrocarbons increased in DCM extracts following surfactants washing, but pyrrolidinone was removed through washing processes.
Other compounds, such as aromatics, alcohol, phenol and pyrrolidinone, are present in either trace amounts or as entrained impurities.
Another challenge has surrounded the need to remove substances perceived as hazardous, particularly formaldehyde and N-methyl pyrrolidinone
Ceftobiprole is a pyrrolidinone
-3- ylide-methyl cephalosporin and was formerly designated as BAL 9141/RO 63-9141 (Figure 3A).
(NMP), toluene, silicone oil, styrene, and [d.
Solvents such as acetone, N-methyl pyrrolidinone
(NMP), and methyl ethyl ketone (MEK) are commonly used in the preparation of PUDs.
the protonated pyrrolodine or pyrrolidinone
groups, resulting from loss of the pyridyl group was present in the spectra of nicotine (m/z 84), N-ethylnorcotinine (m/z 112), and cotinine (m/z 98).
The random copolymers with various molar ratios of vinyl pyrrolidinone, styrene and stearyl methacrylate were synthesized.
Vinyl pyrrolidinone was used as a polar comonomer to impart dispersancy character to the copolymer.
The FPI films were obtained by casting on a glass plate from the 15 wt% N-methyl pyrrolidinone
In addition, pyrrolidinones
and N-methylpyrrolidinone can also be directly produced from succinic acid manufactured by fermentation.