公开(公告)号：US06657077B1

公开(公告)日：2003-12-02

申请号：US09700546

申请日：2000-11-16

申请人： Jacques Thauront ,  Laurent Bonnamich ,  Guy Fraysse

发明人： Jacques Thauront ,  Laurent Bonnamich ,  Guy Fraysse

IPC分类号： C07C5109

CPC分类号： C07C51/09 ,  C08J11/16 ,  C08J2367/02 ,  Y02W30/705 ,  C07C63/26

摘要： The invention concerns a method for producing terephthalate of alkaline metal and alkylene glycol from recuperated alkylene polyterephthalate. It comprises saponification of said alkylene terephthalates with an aqueous sodium solution, adding a sufficient volume of water to ensure solubilization of the entire alkaline metal terephthalate produced in the reaction medium liquid phase and crystallisation of the sodium terephthalate by concentration of said liquid phase. The resulting sodium terephthalate can be directly used for producing pure terephthalic acid usable for the renewed production of alkylene polyterephthalates to be used in the food industry.

摘要翻译： 本发明涉及从再生烯烃聚对苯二甲酸酯生产碱金属和亚烷基二醇的对苯二甲酸酯的方法。 它包括用钠水溶液皂化所述的对苯二甲酸亚烷基酯，加入足够体积的水以确保在反应介质液相中产生的整个碱金属对苯二甲酸酯的溶解，并通过所述液相的浓度使对苯二甲酸钠的结晶溶解。 所得到的对苯二甲酸钠可以直接用于生产用于重新生产用于食品工业中的聚对苯二甲酸亚烷基酯的纯对苯二甲酸。

公开(公告)号：US5184950A

公开(公告)日：1993-02-09

申请号：US597711

申请日：1990-10-12

申请人： Guy Fraysse ,  Jacques Thauront

发明人： Guy Fraysse ,  Jacques Thauront

IPC分类号： B01D1/00 ,  B01D5/00 ,  B09B3/00 ,  B09C1/00 ,  B09C1/06 ,  F27B7/06

CPC分类号： B09B3/0058 ,  B09C1/06 ,  Y02W30/825

摘要： A process for the decontamination of a solid product polluted by a contaminant which can be vaporized by heating under vacuum, and devices for carrying out such a process, wherein the product is introduced into a heating and evacuating enclosure (3, 37, 72), said product is heated, substantially in bulk, within a given temperature range, a vacuum being created in said enclosure which is sufficient to reduce the pressure of the enclosure below the vaporization threshold of the contaminant within said temperature range, said temperature and reduced pressure conditions in the enclosure are maintained for a sufficient time to vaporize substantially all the contaminant contained in said product, the vaporized contaminant is extracted by sucking the atmosphere out of the enclosure, and said contaminant which has been sucked out is condensed.

摘要翻译： 用于对真空中加热蒸发的污染物污染的固体产物进行净化的方法，以及用于进行这种方法的装置，其中将产物引入加热和抽空的外壳（3,37,72）中， 所述产品在给定的温度范围内基本上大量地加热，在所述外壳中产生足够的真空，所述真空度足以将所述外壳的压力降低到所述温度范围内的所述温度范围内的所述污染物的蒸发阈值，所述温度和减压条件 在外壳中维持足够的时间以蒸发所述产品中包含的基本上所有的污染物，通过将气氛吸出外壳来提取蒸发的污染物，并且所吸收的所述污染物被冷凝。