Big Chemical Encyclopedia

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

Articles Figures Tables About

Xanthan glyoxal-treated

It is the relative ease of hydrolysis of hemiacetals I and II from a polysaccharide that is so attractive in effecting dispersibility. Glyoxal-treated xanthan gum and other gums are very dispersible because of their relative insolubility but as the acetals are hydrolyzed, the gums begin to hydrate at a rate that allows each gum particle to remain separated to form lump-free solutions. [Pg.34]

Factors Affecting Dispersibility and Hydration of Glyoxal-Treated Xanthan Gum... [Pg.34]

Figure 6. Hydration of glyoxal-treated xanthan gum (low shear)... Figure 6. Hydration of glyoxal-treated xanthan gum (low shear)...
Since, in certain applications of glyoxal-treated xanthan guin, it is desirable to delay the development of viscosity (hydration delay), a simple test was developed to monitor this behavior (Figure 8). In the hydration delay test discussed, the gum is added to the vortex (created by a magnetic stirrer) of the hydration fluid (usually synthetic tap water) and the time that is required for the vortex to dlsappeeu Isecause of viscosity development is called the hydration delay time. [Pg.38]

The lower the pH, the greater the hydration delay time becomes. This results Isecause hydrolysis of glyoxal from the gum is slower at low pH values. Thus, lowering the pH of the hydration fluid can be used to obtain longer hydration delay times with glyoxal-treated xanthan gum without adversely affecting dispersibility. [Pg.38]

With glyoxal-treated xanthan gum, it has been shown that the mesh size, rate of shear of mixing, pH, and salt levels all affect the hydration and dispersibility. Borate-treated xanthan gum has excellent dispersibility and is especially suited to alkaline solutions. Borate-treated xanthan gum blended with a base (e.g., Na2C03) and a slowly soluble acid (e.g., fumaric acid) are dispersible in neutral solutions. [Pg.40]


See other pages where Xanthan glyoxal-treated is mentioned: [Pg.34]    [Pg.34]    [Pg.38]    [Pg.38]    [Pg.38]    [Pg.34]   
See also in sourсe #XX -- [ Pg.40 ]




SEARCH



Glyoxal-treated xanthan gum

Glyoxalate

Glyoxalic

Glyoxals

Xanthanates

© 2024 chempedia.info