Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating ter...Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating terpolymers acrylamide\|hexadecyl ally ammonium chloride\|2\|acrylamino\|2\|metyl propane sulfuric acid (AM\|C 16 DMAAC\|AMPS) is prepared by micelle polymerization with the nonionic monomer\|AM,the anionic monomer\|AMPS,the cationic monomer\|C 16 DMAAC,It is investigated that the effect of the content of the hydrophobic monomer,anionic monomer,cationic monomer,reaction temperature and the concentration of the inorganic salt and the surfactant on the viscosity of the hydrophobically associating aqueous soluble terpolymers in brine.The results show that the aqueous soluble hydrophobically associating terpolymers(1000?mg/L) have good viscofication effect in brine(20000?mg/L),when the content of the hydrophobic monomer is 1\^2%,and of the anionic monomer is 30%,the hydrophobically associating terpolymers can meet the need of polymer flooding in reservoir of the high concentration inorganic salt.展开更多
The title compound was synthesized from 2,4 difluoro α (1 H 1,2,4 triazol 1 yl) acetophenone by phase transfer catalytic reaction with trimethyl sulfoxonium iodide. Total yield of this improved method was 42%.
3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free...3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free conditions at 90℃.Effects of molar ratio of reactants,amount of catalyst,and reaction temperature on the yields of 3,4-dihydropyrimidin-2-(1H)-ones were investigated.The results showed that at the condition of naldehyde∶n1,3-dicarbonyl compounds∶nurea(or thiourea)=1∶1.2∶1.5,1 mol% catalyst(molar percent of aldehyde),2.0 h at 90℃,the yields of products were 51-96%.After reaction,the catalyst could be reused for four times without distinct loss of catalytic activity.展开更多
文摘Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating terpolymers acrylamide\|hexadecyl ally ammonium chloride\|2\|acrylamino\|2\|metyl propane sulfuric acid (AM\|C 16 DMAAC\|AMPS) is prepared by micelle polymerization with the nonionic monomer\|AM,the anionic monomer\|AMPS,the cationic monomer\|C 16 DMAAC,It is investigated that the effect of the content of the hydrophobic monomer,anionic monomer,cationic monomer,reaction temperature and the concentration of the inorganic salt and the surfactant on the viscosity of the hydrophobically associating aqueous soluble terpolymers in brine.The results show that the aqueous soluble hydrophobically associating terpolymers(1000?mg/L) have good viscofication effect in brine(20000?mg/L),when the content of the hydrophobic monomer is 1\^2%,and of the anionic monomer is 30%,the hydrophobically associating terpolymers can meet the need of polymer flooding in reservoir of the high concentration inorganic salt.
文摘The title compound was synthesized from 2,4 difluoro α (1 H 1,2,4 triazol 1 yl) acetophenone by phase transfer catalytic reaction with trimethyl sulfoxonium iodide. Total yield of this improved method was 42%.
文摘3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free conditions at 90℃.Effects of molar ratio of reactants,amount of catalyst,and reaction temperature on the yields of 3,4-dihydropyrimidin-2-(1H)-ones were investigated.The results showed that at the condition of naldehyde∶n1,3-dicarbonyl compounds∶nurea(or thiourea)=1∶1.2∶1.5,1 mol% catalyst(molar percent of aldehyde),2.0 h at 90℃,the yields of products were 51-96%.After reaction,the catalyst could be reused for four times without distinct loss of catalytic activity.
