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    • 6. 发明授权
    • Process for polyol recovery from polyurethane foam comprising alcohol
and steam hydrolysis
    • 包含醇和蒸汽水解的聚氨酯泡沫体回收多元醇的方法
    • US4316992A
    • 1982-02-23
    • US237027
    • 1981-02-23
    • John L. GerlockJacob BraslawJane Albright
    • John L. GerlockJacob BraslawJane Albright
    • C08J11/10C07C43/11
    • C08J11/14C08J2375/04Y02W30/704
    • Polyol is recovered from polyether based polyurethane foam by a process which includes reacting the foam with an alcohol, preferably a glycol ether, whose boiling point is between 225.degree. C. and 280.degree. C. at a temperature between 185.degree. C. and 220.degree. C. under a non-oxidizing atmosphere. Thereafter, superheated steam is bubbled through the solution to hydrolyze substantially all the carbamate produced during dissolution to amines and alcohols, preferably in the presence of sodium hydroxide. During hydrolysis, the temperature of the solution is maintained at between 185.degree. C. and 220.degree. C. and the solution volume is maintained by adding alcohol to replace that removed by the steam. At least a portion of the solution is subjected to vacuum purification at a temperature below about 230.degree. C. The portion of the solution subjected to vacuum purification may be the polyol layer which forms after the hydrolyzed solution has been allowed to stand. Substantially pure polyol is recovered.
    • 通过包括使泡沫与醇(优选二醇醚)反应的方法从聚醚基聚氨酯泡沫中回收多元醇,其沸点在225℃和280℃之间,温度为185℃至220℃。 C.在非氧化性气氛下。 此后,将过热蒸汽鼓泡通过溶液,以将溶解过程中产生的基本上所有氨基甲酸酯水解成胺和醇,优选在氢氧化钠存在下进行水解。 在水解期间,溶液的温度保持在185℃和220℃之间,通过加入醇来维持溶液体积以代替蒸汽除去的溶液体积。 将溶液的至少一部分在低于约230℃的温度下进行真空净化。进行真空净化的溶液的一部分可以是在水解溶液被静置后形成的多元醇层。 回收基本上纯的多元醇。
    • 9. 发明授权
    • Polyol extraction by high boiling alkanes
    • 通过高沸点烷烃提取多元醇
    • US4336406A
    • 1982-06-22
    • US237568
    • 1981-02-24
    • John L. GerlockJacob BraslawWilliam E. Stevens
    • John L. GerlockJacob BraslawWilliam E. Stevens
    • C08G65/00C07C41/34C08J11/24C07C41/01
    • C08J11/24C07C41/34C08J2375/04Y02W30/706
    • Polyol is recovered from polyurethane based polyurethane foam by a process which includes first dissolving the foam in a saturated alcohol, preferably diethylene glycol, having a boiling point between about 225.degree. C. and 280.degree. C. at a temperature between about 185.degree. C. and 220.degree. C. under a non-oxidizing atmosphere. The solution is reacted with water in the presence of an alkali hydroxide catalyst, preferably sodium hydroxide, under a non-oxidizing atmosphere, such as nitrogen. This may be done by refluxing the solution at a temperature between about 175.degree. C. and 220.degree. C. until all the carbamates produced during dissolution have been hydrolyzed to amines and alcohol. Water remaining in solution after hydrolysis is removed. A high boiling alkane is used to extract the polyol from the solution still under a non-oxidizing atmosphere and then the extracted polyol is subjected to vacuum purification at a temperature of less than about 230.degree. C. Substantially pure polyol is recovered which can be used to make new foam.
    • 通过包括首先在约185℃的温度下将泡沫溶解在约225℃至280℃的沸点在约225℃至280℃的饱和醇,优选二甘醇中的方法从聚氨酯基聚氨酯泡沫中回收多元醇。 和220℃。 在碱性氢氧化物催化剂,优选氢氧化钠的存在下,在非氧化性气氛如氮气下使溶液与水反应。 这可以通过在约175℃和220℃之间的温度下回流溶液来进行,直到在溶解期间产生的所有氨基甲酸酯已被水解成胺和醇。 除去水解后残存在溶液中的水。 使用高沸点烷烃从仍在非氧化性气氛下的溶液中提取多元醇,然后将提取的多元醇在小于约230℃的温度下进行真空净化。回收可以使用的基本上纯的多元醇 新泡沫。
    • 10. 发明授权
    • Catalyzed dissolution-hydrolysis of polyurethane wastes
    • 催化聚氨酯废物的溶解 - 水解
    • US4317939A
    • 1982-03-02
    • US237008
    • 1981-02-23
    • John L. GerlockJacob BraslawJane Albright
    • John L. GerlockJacob BraslawJane Albright
    • C08J11/10C07C41/01
    • C08J11/14C08J2375/04Y02W30/704
    • Polyol is recovered from polyurethane waste foam and thereafter used to produce high quality new foam. The foam is dissolved in a saturated alcohol, preferably diethylene glycol, having a boiling point between 220.degree. C. and 280.degree. C. at a temperature between 185.degree. C. and 220.degree. C. under a non-oxidizing atmosphere such as nitrogen. Water and an alkali metal hydroxide catalyst, preferably sodium hydroxide, are added to the solution which is then refluxed at a temperature of between about 175.degree. C. and 220.degree. C. still under a non-oxidizing atmosphere until all the carbamates produced during dissolution have been hydrolyzed to amines and alcohol. At least a portion of the solution is subjected to vacuum purification at a temperature below about 230.degree. C. Substantially pure polyol is recovered. Preferably, prior to vacuum distillation, water is removed from the solution.
    • 从聚氨酯废泡沫中回收多元醇,然后用于生产高质量的新泡沫。 在非氧化性气氛例如氮气下,将该泡沫体在185℃至220℃之间的温度下溶解于沸点为220-280℃的饱和醇,优选二甘醇。 将水和碱金属氢氧化物催化剂(优选氢氧化钠)加入到溶液中,然后在约175℃至220℃的温度下回流,仍然在非氧化性气氛下直至溶解过程中产生的所有氨基甲酸酯 已经被水解成胺和醇。 至少一部分溶液在低于约230℃的温度下进行真空净化。回收基本上纯的多元醇。 优选地,在真空蒸馏之前,从溶液中除去水。