公开(公告)号：US5830315A

公开(公告)日：1998-11-03

申请号：US499098

申请日：1995-07-06

申请人： David Brian Mitchell ,  Ralph Lemmel Minnis ,  Thomas Peter Curran ,  Steven M. Deboo ,  John Arthur Kelly ,  Rashmi Patwardhan ,  Wun Ten Tai

发明人： David Brian Mitchell ,  Ralph Lemmel Minnis ,  Thomas Peter Curran ,  Steven M. Deboo ,  John Arthur Kelly ,  Rashmi Patwardhan ,  Wun Ten Tai

IPC分类号： B01D17/05 ,  C02F1/52 ,  C02F1/54 ,  C08G8/08 ,  C08G14/06 ,  C08G16/02 ,  C08H99/00 ,  C09D7/00 ,  D21C5/02 ,  D21F1/32 ,  C02F1/56

CPC分类号： C08H99/00 ,  C02F1/52 ,  C02F1/54 ,  C08G14/06 ,  C08G16/02 ,  C08G8/08 ,  C09D7/008 ,  Y10S162/04 ,  Y10S210/93

摘要： There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e.g. acetic anhydride), etherification agent (e.g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e.g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e.g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7. The above modified tannins are useful for the coagulation and/or detackification of solid particles suspended in an aqueous system, such as paint particles suspended in the waste water of a paint spray booth operation. Such tannins also have utility for demulsifying oil-in-water emulsions.

摘要翻译： 提供了包含单宁含羟基的组合物，其已经（a）通过至少一种所述羟基与至少一种选自酯化剂（例如乙酸酐），醚化剂 （例如二氯甲烷或季铵有机胺如N-（3-氯-2-羟丙基）三甲基氯化铵），以通过所述羟基形成相应的酯或醚，和（b）衍生化。 化学修饰的单宁通过与醛（例如甲醛）或醛和至少一种选自含有至少一个伯或仲氮（例如环己基胺）的氨和有机胺的组分反应衍生化; 所述衍生的单宁在pH低于7时是水溶性的或可分散的，并且在高于7的pH下不溶于水。上述改性的单宁可用于悬浮在水性体系中的固体颗粒的凝结和/或脱粘，例如悬浮在 喷漆房的废水运行。 这种单宁也可用于将水包油乳化液破乳。