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1. 发明授权

US4755295A Multistage arrangement for countercurrent separation and methods of operating same 失效
标题翻译：用于逆流分离的多级布置和操作方法
公开(公告)号：US4755295A
公开(公告)日：1988-07-05
申请号：US080746
申请日：1987-07-31
申请人： Friedrich Donhauser , Anton Schoengen , Johann H. Shroeder , Jorg Porschen
发明人： Friedrich Donhauser , Anton Schoengen , Johann H. Shroeder , Jorg Porschen
IPC分类号： B04C5/24 , B01D11/02 , C07C51/09 , C07C63/26 , B01D17/038
CPC分类号： B01D11/02 , C07C51/43
摘要： A multistage arrangement for countercurrent separation of suspended solids, such as crystals, by means of hydro-cyclone groups connected in series and corresponding pumps and pump wells. For operating with relatively small expenditures with respect to apparatus under high pressures and at high temperatures within a certain, limited temperature range, the hydro-cyclone groups, the pump wells with pumps projecting into the pump wells, and the essential parts or regions of the lines are placed in a common pressure-proof and heat-insulated chamber. In addition, for removing coarser crystallizations and solid particles, an upstream classifier also accommodated in the chamber may be provided. The multistage arrangement can be used in a process for the production of terephthalic acid from dimethyl-terephthalate as the intermediate product, and in a process for the hydrogenation of coal.
摘要翻译：用于通过串联连接的水力旋风分离器和相应的泵和泵井逆流分离悬浮固体（例如晶体）的多级装置。对于在高压和高温下在一定的有限温度范围内的设备的相对较小的支出的操作，水力旋风组，具有泵突入泵井的泵井以及其中的主要部分或区域线路放置在通用的耐压隔热室中。此外，为了除去较粗的结晶和固体颗粒，也可以提供也容纳在室中的上游分级器。多级排列可用于从作为中间产物的二甲基对苯二甲酸酯生产对苯二甲酸的方法和用于氢化氢的方法。

2. 发明授权

US4707274A Multistage arrangement for countercurrent separation and methods of operating same 失效
公开(公告)号：US4707274A
公开(公告)日：1987-11-17
申请号：US948049
申请日：1986-12-31
申请人： Friedrich Donhauser , Anton Schoengen , Johann H. Schroeder , Jorg Porschen
发明人： Friedrich Donhauser , Anton Schoengen , Johann H. Schroeder , Jorg Porschen
IPC分类号： B04C5/24 , B01D11/02 , C07C51/09 , C07C63/26 , B01D17/038
CPC分类号： B01D11/02 , C07C51/43
摘要： A multistage arrangement for countercurrent separation of suspended solids, such as crystals, by means of hydro-cyclone groups connected in series and corresponding pumps and pump wells. For operating with relatively small expenditures with respect to apparatus under high pressures and at high temperatures within a certain, limited temperature range, the hydro-cyclone groups, the pump wells with pumps projecting into the pump wells, and the essential parts or regions of the lines are placed in a common pressure-proof and heat-insulated chamber. In addition, for removing coarser crystallizations and solid particles, an upstream classifier also accommodated in the chamber may be provided. The multistage arrangement can be used in a process for the production of terephthalic acid from dimethyl-terephthalate as the intermediate product, and in a process for the hydrogenation of coal.

3. 发明授权

US5891410A Process for the purification of an oxidation off gas 失效
标题翻译：净化氧化废气的方法
公开(公告)号：US5891410A
公开(公告)日：1999-04-06
申请号：US27160
申请日：1993-02-24
申请人： Rudolf Modic , Hermann-Josef Korte , Anton Schoengen , Johann-Heinrich Schroeder , Jorg Porschen
发明人： Rudolf Modic , Hermann-Josef Korte , Anton Schoengen , Johann-Heinrich Schroeder , Jorg Porschen
IPC分类号： B01D53/14 , B01D53/34 , B01D53/72 , B01D53/75 , B01D53/96 , C07C67/39 , C07C69/82 , C10L3/10 , F02C3/22 , F02C3/30 , B01D53/44
CPC分类号： F02C3/22 , B01D53/72 , Y02E20/12
摘要： A process is disclosed for the purification of an off-gas which originates from the oxidation of xylene with air in the Witten process for the preparation of dimethyl terephthalate by subjecting the off-gas to a partial condensation step to remove constituents such as dimethyl terephthalate and xylene; then contacting the off-gas with a solvent such as para-toluic acid or a mixture of para-toluic acid and methyl benzoate so as to remove contaminants such as para-xylene out of the off-gas; then contacting the off-gas with a solvent such as methyl benzoate to remove contaminants such as methyl para-toluate out of the off-gas; then contacting the off-gas with water so as to remove contaminants such as methanol out of the off-gas, and then combusting the off-gas.
摘要翻译： PCT No.PCT / EP91 / 01577 Sec。 371日期：1993年2月24日 102（e）日期1993年2月24日PCT 1991年8月20日PCT PCT。出版物WO92 / 03213 日期：1992年3月5日公开了在Witten工艺中用于制备二甲基对苯二甲酸二甲酯的废气净化方法，该废气源于二甲苯与空气的氧化，通过使废气进行部分冷凝步骤以除去组分如对苯二甲酸二甲酯和二甲苯; 然后使尾气与溶剂如对甲苯甲酸或对甲苯甲酸和苯甲酸甲酯的混合物接触，以便从废气中除去诸如对二甲苯之类的污染物; 然后使废气与溶剂如苯甲酸甲酯接触，以从废气中除去污染物如对甲苯甲酸甲酯; 然后使废气与水接触，以便从废气中除去诸如甲醇的污染物，然后使废气燃烧。

4. 发明授权

US4642377A Process for producing terephthalic acid from p-xylene and methanol by way of dimethyl terephthalate 失效
标题翻译：通过对苯二甲酸二甲酯由对二甲苯和甲醇生产对苯二甲酸的方法
公开(公告)号：US4642377A
公开(公告)日：1987-02-10
申请号：US707579
申请日：1985-03-04
申请人： Rudolf Modic , Jorg Porschen , Anton Schoengen , Ralf Wirges
发明人： Rudolf Modic , Jorg Porschen , Anton Schoengen , Ralf Wirges
IPC分类号： C07C63/26 , C07C51/00 , C07C51/09 , C07C67/00 , C07C67/39 , C07C69/82
CPC分类号： C07C51/09 , C07C67/39
摘要： A process for the production of terephthalic acid from p-xylene and methanol by way of the dimethyl terephthalate obtained by oxidation, in the liquid phase with atmospheric oxygen in the presence of dissolved heavy metal compounds as the catalyst, of a mixture of p-xylene and a fraction containing predominantly methyl p-toluate, which fraction is recycled into the oxidation, to obtain an oxidation product containing primarily p-toluic acid and monomethyl terephthalate at a temperature of 140.degree.-170.degree. C. and under a pressure of 4-8 bar; by esterification of the oxidation product in a reactor with liquid and subsequently vaporized methanol brought to an elevated pressure, at a temperature of 220.degree.-280.degree. C. and under a pressure of 20-25 bar to obtain a raw ester containing primarily methyl p-toluate and dimethyl terephthalate; by withdrawing the raw ester fraction and a methanol-containing vapor fraction from the esterification reactor; by distillatory separation of the raw ester into a methyl p-toluate fraction and a fraction rich in terephthalic aldehyde methyl ester, which fractions are recycled into the oxidation, a raw dimethyl terephthalate fraction, and a residual fraction; and by hydrolysis of the raw dimethyl terephthalate fraction with water, obtaining the thus-formed terephthalic acid and separation of a methanol-water mixture. In this process, the methanol-containing vapor fraction and the methanol-water mixture are separated by rectification under elevated pressure and elevated temperature into a methanol-rich head fraction and an aqueous sump phase, the methanol formed at the head of the rectification stage is withdrawn in vapor phase under elevated pressure, and esterification of the oxidation product is conducted with the methanol-containing vapor brought by compression to esterification pressure and esterification temperature.
摘要翻译：通过在溶解的重金属化合物作为催化剂的存在下，在与常压氧气的液相中通过氧化获得的对二甲苯和甲醇制备对苯二甲酸的方法，将对二甲苯和主要含有对甲苯甲酸甲酯的级分，该级分被再循环到氧化中，得到主要对甲苯甲酸和对甲基苯甲酸单甲酯在140-170℃的温度和4- 8巴; 通过将反应器中的氧化产物在液体中酯化并随后蒸发的甲醇在220-280℃的温度和20-25巴的压力下进行升高的压力，得到主要含有甲基p - 对苯二甲酸二甲酯和对苯二甲酸二甲酯; 通过从酯化反应器中取出原始酯馏分和含甲醇的蒸气馏分; 通过将原料酯蒸馏分离成对甲苯甲酸甲酯馏分和富含对苯二甲酸甲酯的馏分，将这些馏分循环到氧化中，生成二甲基对苯二甲酸酯馏分和残余馏分; 并用水对生成的对苯二甲酸二甲酯部分进行水解，得到如此形成的对苯二甲酸并分离甲醇 - 水混合物。在此过程中，将含甲醇的蒸气馏分和甲醇 - 水混合物在升高的压力和升高的温度下通过精馏分离成富含甲醇的头馏分和水池，在精馏段的顶部形成的甲醇为在气相中在升高的压力下取出，氧化产物的酯化是通过压缩所产生的含甲醇的蒸气进行酯化压力和酯化温度进行的。

5. 发明授权

US4642369A Process for the production of dimethyl terephthalate from p-xylene and methanol 失效
公开(公告)号：US4642369A
公开(公告)日：1987-02-10
申请号：US707696
申请日：1985-03-04
申请人： Rudolf Modic , Jorg Porschen , Anton Schoengen , Ralf Wirges
发明人： Rudolf Modic , Jorg Porschen , Anton Schoengen , Ralf Wirges
IPC分类号： C07C69/82 , C07C51/09 , C07C67/00 , C07C67/08 , C07C67/39
CPC分类号： C07C67/08 , C07C51/09 , C07C67/39
摘要： A process for the production of dimethyl terephthalate from p-xylene and methanol by oxidation in a reactor, in the liquid phase with atmospheric oxygen in the presence of dissolved heavy metal compounds as a catalyst, of a mixture of p-xylene and a fraction containing predominantly methyl p-toluate, which fraction is recycled into the oxidation, to obtain an oxidation product containing primarily p-toluic acid and monomethyl terephthalate, at a temperature of 140.degree.-170.degree. C. and under a pressure of 4-8 bar; by esterification of the oxidation product with liquid and subsequently vaporized methanol brought to an elevated pressure, at a temperature of 220.degree.-280.degree. C. and under a pressure of 20-25 bar in a reactor to obtain a raw ester containing primarily p-toluate and dimethyl terephthalate; by withdrawing the raw ester fraction and a methanol-containing vapor fraction from the esterification stage, by distillatory separation of the raw ester into a p-toluate fraction which is recycled into the oxidation, a raw dimethyl terephthalate fraction which is subjected to further processing by recrystallization in methanol, and a residual fraction which is optionally subjected to a thermal aftertreatment or a reactive treatment with methanol and is partially recycled into the process after a subsequent working-up step by distillation. In this process, the esterification of the oxidation product is conducted with a methanol-containing vapor, brought by compression to the elevated pressure and elevated temperature required for esterification, which methanol-containing vapor has been obtained from the filtrate of the recrystallization of the raw dimethyl terephthalate fraction by vaporization or also by rectification of the methanol-containing vapor fraction and optionally additional methanol-containing process streams, under a pressure lying below the pressure utilized in the esterification reactor.

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