摘要
测定了水溶性阳离子聚多糖（季铵基聚多糖）MS—1在粒径0．175～0．246mm的洗油油砂上的静态溶液吸附量，吸附等温线符合Langmuir吸附规律，温度对吸附量的影响小，25℃吸附量略大于60℃吸附量；MM-1的饱和吸附量远大于HPAM．25℃和60℃时分别为1592．1和1513.6μg／g。MM—1在油砂上的吸附量在pH=7．0时有最大值，随电解质硫酸钠加入量的增大（W44％）或MM-1阳离子度的增大（≤0．40）而不断增大并趋于平衡值。对产生以上实验结果的原因作了解释。在60℃吸附MM．1后分离出的油砂在蒸馏水中的zeta电位，随MM-1阳离子度的增大（0．05～0．40）而增大，由负值变正值．阳离子度为0．125时为零。MM-1在溶液中与原油和油砂的相互作用放热，放热量随MM-1浓度增大而增大，分别在浓度1．0g／L（与原油）和10g／L（与油砂）时出现最大值，此后趋于恒定。图8参14。
The static adsorption of cationic polysaccharide, or quartenary ammonium salt of polysaccharide, MM-1 on deoiled reservoir sands of 0. 175-0.246 mm in diameter from aqueous solution is investigated and it is shown that the isotherms of adsorption fit to Langrnuir＇s equation; the experimental temperature has minor influence on the adsorption and the adsorption amount at 25℃ is slightly larger than that at 60℃ ; the saturation adsorption of MM-1 is much larger than that of HPAM polymers, being of 1592.1 and 1513.6/zg/g sands at 25℃ and 60℃, respectively. The adsorption of MM-1 on sands reaches a maximum at pH = 7.0 and increases continueously and finally approaches to an equilibrium value with increasing amout of Na2SO4 added （≤4%） or substitution degree （SD） by cationic functionalities （≤0.40）. The reasons for these experimental phenomena are discussed. The zeta potential of the reservoir sands with MM-1 adsorbed from aqueous solution at 60℃ is measured in distilled water and is shown to increase with increasing SD in range 0.05-0.40 from negative to positive values and to go through zero point at SD≈0. 125. The interactions of MM-1 in aqueous solution with crude oil and oily sands are exothermic and the heat of interaction increases with increasing MM-1 concentration, reaches a peak value at concentration 1.0 g/L （with crude oil） and 10 g/L （with oily sand） and then becomes constant.
出处
《油田化学》
CAS
CSCD
北大核心
2007年第2期150-153,共4页
Oilfield Chemistry
关键词
阳离子聚糖
季铵基聚糖
阴离子度
溶液吸附
反应热
ZETA电位
油砂
原油
驱油聚合物
cationic polysaccharide
quartenary ammonium salt of polysaccharide
cationic substitution degree
adsorption from solution
heat of reactions
zeta potential
reservoir sands
crude oil
polymer for EOR
