Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Sulphobetaines weakly basic

Sulphonates (sulphobetaines) with weakly basic N (SW). The structure shown is a zwitterion. It can lose a proton in alkaline solution to give the fully deprotonated (anionic) form, but cannot gain a proton. [Pg.23]

SW sulphobetaines (with weakly basic nitrogen) are zwitterionic at low pH and anionic at high pH. [Pg.24]

All cations, including weak bases, amine oxides, betaines, amphoterics all bases not sulphobetaines with weakly basic nitrogen... [Pg.87]

Sulphonates (sulphobetaines) with strongly basic N (SS). Having neither weak acid nor weak base groups, these can exist only in the zwitterionic form, whatever the pH of the solution. [Pg.23]

Evaporate both solutions to a low volume, dilute to about 10 ml with water and carry out the indicator test on small portions of each of them in both acid and alkaline solution. The solution from the cation exchange column contains only anionics, soaps, SW and SS sul-phobetaines and nonionics, and the solution from the anion exchange column contains only cationics with both weakly and strongly basic nitrogen, betaines, SS sulphobetaines and nonionics. WW amphoterics are retained by both columns. [Pg.25]

Mixtures of amphoterics are not likely to be encountered, but a basic approach is outlined which will succeed in many cases. Acid-base titration is unlikely to be useful because of the presence of other weak acids and bases. The procedure therefore relies on titration with SDS and/or benzethonium chloride (BEC) and will not always be completely successful. In all cases, if two-phase titration fails, potentiometric titration is still likely to succeed. Acid solutions must be at least 0.1 M in H and alkaline solutions at least 0.1 M in OH . It may be possible to replace SDS with NaTPB in at least some cases. Sulphobetaines cannot be determined in the presence of other amphoterics without separation. [Pg.200]


See other pages where Sulphobetaines weakly basic is mentioned: [Pg.25]   
See also in sourсe #XX -- [ Pg.23 ]




SEARCH



Weakly basic

© 2024 chempedia.info