申请人:PHILLIPS PETROLEUM COMPANY
公开号:EP0566028A1
公开(公告)日:1993-10-20
A gelable composition and process are disclosed that delay the gelation and increase the gel strength of gelled water soluble acrylamide-containing polymers contains: (1) a water dispersible first crosslinking compound selected from the group consisting of p-aminosalicylic acid, furfuryl alcohol, RArOC(O)R' and HOArC(O)OR'' wherein Ar represents a phenyl group which can be substituted or non-substituted; R is a hydrogen or a carboxylic group; R' is a C₁-C₆ alkyl; R'' is a hydrogen, a phenyl group, or a C₁-C₆ alkyl; and when R is a carboxylic group, R and C(O)OR'' can be at ortho, meta, or para position with respect to the OC(O)R' group and the OH group, respectively; (2) a water dispersible second crosslinking compound selected from the group consisting of aldehydes and aldehyde-generating compounds; (3) a water soluble acrylamide-containing polymer; and (4) water.
本发明公开了一种可凝胶组合物和工艺,可延迟凝胶水溶性含丙烯酰胺聚合物的凝胶化并提高其凝胶强度,该组合物和工艺包含(1) 选自对氨基水杨酸、糠醇、RArOC(O)R'和 HOArC(O)OR''组成的组的可在水中分散的第一交联化合物,其中 Ar 代表苯基,可被取代或未被取代;R 是氢或羧基; R' 是 C₁-C₆ 烷基; R'' 是氢、苯基或 C₁-C₆ 烷基;当 R 是羧基时,R 和 C(O)OR''可分别位于相对于 OC(O)R'基团和 OH 基团的正位、偏位或对位; (2) 可在水中分散的第二种交联化合物,该化合物选自由醛和醛生成化合物组成的组; (3) 水溶性含丙烯酰胺聚合物;以及 (4) 水。