| abstract |
A thermostable, viscous xanthan polysaccharide solution prepared by the process of heating a xanthan polysaccharide solution in the presence of at least one C1 to C10 alkyl or C3 to C10 cycloalkyl substituted primary or secondary mono- or diamine having an upper limit of a total of 15 carbon atoms under conditions sufficient to form a thermostable, viscous xanthan polysaccharide solution. The thermostable, viscous xanthan polysaccharide solution may be used as a mobility buffer in a process for the enhanced recovery of oil. |