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11. 发明授权

US4079094A Separation of ethylbenzene with an adsorbent comprising SR and K exchanged X or Y zeolite 失效
标题翻译：用含有SR和K的吸附剂分离乙苯，交换X或Y沸石
公开(公告)号：US4079094A
公开(公告)日：1978-03-14
申请号：US727185
申请日：1976-09-27
申请人： Donald H. Rosback , Richard W. Neuzil
发明人： Donald H. Rosback , Richard W. Neuzil
IPC分类号： C07C7/13
CPC分类号： C07C7/13
摘要： An adsorptive separation process for separating ethylbenzene from a feed mixture comprising ethylbenzene and a plurality of xylene isomers which process comprises contacting the feed mixture with an adsorbent comprising strontium and potassium exchanged type X or type Y zeolite, selectively adsorbing substantially all of the said xylene isomers to the substantial exclusion of the ethylbenzene and thereafter recovering high-purity ethylbenzene. A desorption step may be used to desorb the adsorbed xylene isomers. The process can be either in the liquid or vapor phase.

12. 发明授权

US3960774A Zeolitic adsorbent for xylene separation 失效
标题翻译：用于二甲苯分离的沸石吸附剂
公开(公告)号：US3960774A
公开(公告)日：1976-06-01
申请号：US543845
申请日：1975-01-24
申请人： Donald H. Rosback
发明人： Donald H. Rosback
IPC分类号： B01J20/18 , B01J29/06 , C07C7/00
CPC分类号： B01J20/186
摘要： A solid adsorbent useful for the separation of para-xylene from a mixture of C.sub.8 aromatic hydrocarbons. The adsorbent is prepared by the steps of: ion-exchanging a precursor mass containing type X or type Y zeolite and amorphous material with an aqueous sodium hydroxide solution to effect the addition of sodium cations to the zeolite structure, ionexchanging the sodium-exchanged mass to effect the essentially complete exchange of sodium cations, and drying the resulting material at conditions to reduce the LOI at 900.degree. C. to less than about 10 wt. %. The sodium cations can be essentially completely exchanged with barium and potassium cations in a weight ratio of from about 1.5 to 200 or with barium alone. I have found that the sodium hydroxide exchange step produces an adsorbent that has faster adsorption-desorption rates for the desired para-xylene isomer and permits a suitable adsorbent to be produced which contains barium cations alone.
摘要翻译：用于从C8芳族烃混合物中分离对二甲苯的固体吸附剂。吸附剂通过以下步骤制备：使用氢氧化钠水溶液离子交换含有X型或Y型沸石和无定形材料的前体物质，以将钠阳离子加入到沸石结构中，使钠交换的物质离子交换成影响钠阳离子的基本完全交换，并且在使得在900℃至低于约10重量％的条件下干燥所得材料。％。钠阳离子可以基本上与钡和钾阳离子以约1.5至200的重量比或单独的钡完全交换。我发现氢氧化钠交换步骤产生吸附剂，其对于所需的对二甲苯异构体具有更快的吸附 - 解吸速率，并允许生产含有单独钡阳离子的合适的吸附剂。

13. 发明授权

US3943184A Aromatic hydrocarbon isomer separation process 失效
标题翻译：芳烃异构体分离过程
公开(公告)号：US3943184A
公开(公告)日：1976-03-09
申请号：US562604
申请日：1975-03-27
申请人： Donald H. Rosback
发明人： Donald H. Rosback
IPC分类号： B01J20/18 , C07C7/13
CPC分类号： C07C7/13 , B01J20/186
摘要： A process for the separation of the para-isomer from a hydrocarbon feed mixture comprising at least two bi-alkyl substituted monocyclic aromatic isomers, including the para-isomer, said isomers having from 8 to about 18 carbon atoms per molecule using a specially prepared adsorbent comprising a Y zeolite containing at the exchangeable cationic sites one or more selected cations. The feed mixture is passed through a bed of the adsorbent wherein the para-isomer is preferentially adsorbed within the adsorbent and thereafter recovered from the adsorbent. Novel feature of the process is the use of the specially prepared adsorbents which have faster adsorption-desorption rates for the desired para-isomer.
摘要翻译：一种用于从包含至少两个双烷基取代的单环芳族异构体（包括对位异构体）的烃进料混合物中分离对位异构体的方法，所述异构体每分子具有8至约18个碳原子，使用特别制备的吸附剂包含在可交换阳离子位点含有一个或多个选定阳离子的Y沸石。进料混合物通过吸附剂床，其中对位异构体优先吸附在吸附剂内，然后从吸附剂中回收。该方法的新特点是使用特别制备的吸附剂，其对于所需的对位异构体具有更快的吸附 - 解吸速率。

14. 发明授权

US3943183A Aromatic hydrocarbon isomer separation process by adsorption 失效
标题翻译：芳烃异构体分离过程通过吸附
公开(公告)号：US3943183A
公开(公告)日：1976-03-09
申请号：US493376
申请日：1974-07-31
申请人： Donald H. Rosback
发明人： Donald H. Rosback
IPC分类号： B01J20/18 , C07C7/13
CPC分类号： B01J20/186 , C07C7/13
摘要： A process for separating the para-isomer from a feed mixture containing at least two bi-alkyl substituted monocyclis aromatic isomers, including the para isomer, said isomers having from 8 to about 18 carbon atoms per molecule which process comprises contacting said mixture with an adsorbent prepared by the steps of: contacting a base material comprising type X or type Y zeolite with a fluoride-containing aqueous sodium hydroxide solution at first ion exchange conditions to effect the addition of sodium to and the extraction of alumina from said base material; treating the sodium-exchanged base material at second ion exchange conditions to effect the essentially complete exchange of sodium cations; and, drying the material at conditions to reduce the LOI at 900.degree. C. to less than about 10 wt. % thereby selectively adsorbing at adsorption conditions said para isomer.The first ion exchange with a fluoride-containing aqueous sodium hydroxide solution prior to the second ion exchange with a selected cation or cations produces a superior adsorbent for separating the para isomer from a feed mixture comprising at least two bi-alkyl substituted monocyclic aromatic isomers, including the para isomer, the isomers having from 8 to about 18 carbon atoms per molecule. The adsorbent so produced has faster para isomer transfer rates and higher aromatic capacity than one produced either from untreated base material or from base material treated with fluoride or caustic alone. Additionally, a fluoride treatment of base material alone or in combination with or subsequent to a caustic treatment, prior to potassium and barium or barium ion exchange, essentially eliminates a troublesome dustiness characteristic of adsorbents prepared from untreated base material.
摘要翻译：从包含至少两个双烷基取代的单环芳族异构体（包括对位异构体）的进料混合物中分离对位异构体的方法，每个分子具有8至约18个碳原子的所述异构体，该方法包括使所述混合物与吸附剂通过以下步骤制备：在第一离子交换条件下将包含X型或Y型沸石的基材与含氟化氢的氢氧化钠溶液接触以实现从所述基材提取氧化铝和从其中提取氧化铝; 在第二离子交换条件下处理钠交换的碱性物质以实现钠阳离子的基本完全交换; 并且在900℃将LOI降低到小于约10wt。的条件下干燥该材料。％，从而在吸附条件下选择性吸附所述对位异构体。

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