公开(公告)号：US06419755B1

公开(公告)日：2002-07-16

申请号：US09475845

申请日：1999-12-30

申请人： Doris Arruda ,  Kathleen M. Tomaswick

发明人： Doris Arruda ,  Kathleen M. Tomaswick

IPC分类号： C23G102

CPC分类号： C22B1/005 ,  C09D9/00 ,  C22B21/0069 ,  Y02P10/234

摘要： A chemical delacquering composition, process and system for delacquering substrates such as aluminum scrap in which an aqueous solution containing at least one short-chain organic acid, preferably a mixture of two short-chain organic acids, and optional components such as surfactants, are contacted onto the substrate(s) with application of heat and agitation. The invention embraces the use of one or more organic acids (carboxylic acids) having a total of 2-12 carbons, preferably 3-8 carbons. Concentration of organic acid by weight ranges from about 0.5-8% per at least one organic acid, or preferably 2-4% for each organic acid component assuming two organic acid components are present. In the preferred embodiment of the invention, about 2-4% each of citric and lactic acids are present in the delacquering composition. Processing temperatures range from 160-212° F., preferably 180-212° F., and most preferably 185-212° F. (higher temperatures may be used in pressurized reactors, although pressurized reactors are not generally necessary).

摘要翻译： 用于脱模底物例如铝废料的化学脱胶组合物，方法和系统，其中将含有至少一种短链有机酸的水溶液，优选两种短链有机酸的混合物和任选组分如表面活性剂接触 在加热和搅拌下加入到基材上。 本发明包括使用总共2-12个碳，优选3-8个碳的一种或多种有机酸（羧酸）。 假定存在两种有机酸成分，有机酸的重量浓度范围为每个至少一种有机酸约0.5-8％，或优选2-4％。 在本发明的优选实施方案中，柠檬酸和乳酸中约2-4％存在于脱胶组合物中。 加工温度范围为160-212°F，优选为180-212°F，最优选为185-212°F（更高的温度可用于加压反应器，尽管通常不需要加压反应器）。

公开(公告)号：US06231678B1

公开(公告)日：2001-05-15

申请号：US09692534

申请日：2000-10-19

申请人： Doris Arruda ,  Kathleen M. Tomaswick

发明人： Doris Arruda ,  Kathleen M. Tomaswick

IPC分类号： C23G102

CPC分类号： C09D9/00 ,  C22B1/005 ,  C22B21/0069 ,  Y02P10/234

摘要： A chemical delacquering composition, process and system for delacquering substrates such as aluminum scrap in which an aqueous solution containing at least one short-chain organic acid, preferably a mixture of two short-chain organic acids, and optional components such as surfactants, are contacted onto the substrate(s) with application of heat and agitation. The invention embraces the use of one or more organic acids (carboxylic acids) having a total of 2-12 carbons, preferably 3-8 carbons. Concentration of organic acid by weight ranges from about 0.5-8% per at least one organic acid, or preferably 2-4% for each organic acid component assuming two organic acid components are present. In the preferred embodiment of the invention, about 2-4% each of citric and lactic acids are present in the delacquering composition. Processing temperatures range from 160-212° F., preferably 180-212° F., and most preferably 185-212° F.(higher temperatures may be used in pressurized reactors, although pressurized reactors are not generally necessary).

摘要翻译： 用于脱模底物例如铝废料的化学脱胶组合物，方法和系统，其中将含有至少一种短链有机酸的水溶液，优选两种短链有机酸的混合物和任选组分如表面活性剂接触 在加热和搅拌下加入到基材上。 本发明包括使用总共2-12个碳，优选3-8个碳的一种或多种有机酸（羧酸）。 假定存在两种有机酸成分，有机酸的重量浓度范围为每个至少一种有机酸约0.5-8％，或优选2-4％。 在本发明的优选实施方案中，柠檬酸和乳酸中约2-4％存在于脱胶组合物中。 加工温度范围为160-212°F，优选为180-212°F，最优选为185-212°F（更高的温度可用于加压反应器，尽管通常不需要加压反应器）。