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公开(公告)号:US20180155269A1
公开(公告)日:2018-06-07
申请号:US15735014
申请日:2015-06-12
发明人: Steven D. Buchi , Alfred A. Guenkel
IPC分类号: C07C201/16 , C07C205/06 , C07C205/17 , C01C1/10 , C02F1/20
CPC分类号: C07C201/16 , C01C1/10 , C02F1/20 , C02F3/02 , C02F2101/345 , C02F2101/38 , C02F2103/36 , C07C205/06 , C07C205/17 , Y02W10/15
摘要: A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.
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公开(公告)号:US5963878A
公开(公告)日:1999-10-05
申请号:US126087
申请日:1998-07-30
IPC分类号: C07C201/08 , C07C205/06 , C07C205/00
CPC分类号: C07C201/08
摘要: A continuous process to nitrate a nitratable aromatic compound utilizing nitric acid and sulfuric acid feed stocks is described. The process includes the collecting of NO.sub.x O gases with water under pressure to and treating the NO.sub.x gases with water under pressure to produce weak nitric acid which is recycled to the nitric acid feed stock. The process is efficient, permitting the venting of NO.sub.x free gases to the atmosphere.
摘要翻译: 描述了使用硝酸和硫酸原料硝化可硝化芳族化合物的连续方法。 该方法包括将NO x O气体与压力下的水一起收集并在压力下用水处理NOx气体,以产生再循环至硝酸原料的弱硝酸。 该过程是有效的,允许将NO x释放的气体排放到大气中。
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公开(公告)号:US10155719B2
公开(公告)日:2018-12-18
申请号:US15735014
申请日:2015-06-12
发明人: Steven D. Buchi , Alfred A. Guenkel
IPC分类号: C07C201/16 , C07C205/06 , C01C1/10 , C07C205/17 , C02F1/20 , C02F3/02 , C02F1/34 , C02F101/34 , C02F101/38 , C02F103/36
摘要: A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.
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公开(公告)号:US4966276A
公开(公告)日:1990-10-30
申请号:US338692
申请日:1989-04-17
申请人: Alfred A. Guenkel
发明人: Alfred A. Guenkel
IPC分类号: C01B21/44
CPC分类号: C01B21/44 , Y10S159/19 , Y10S159/22 , Y10S159/23 , Y10S203/08 , Y10S203/09
摘要: An integrated continuous processes for concentrating "weak" nitric acid and concurrently reconcentrating the spent dehydrating agent used to break the nitric acid azeotrope to obtain "strong" nitric acid, the processes involving direct coupling of the nitric acid concentration with the reconcentration of the spent dehydrating agent so that less energy input is required. The major proportion of the feed "weak" nitric acid is vaporized before being fed countercurrently into a column to contact a large volume of the dehydrating agent, this vaporization being one of the two major sources of energy input, the second being through the reboiler at the bottom of the column. Energy input is balanced by energy rejection through condensation of strong nitric acid vapor and water vapor. The nitric acid vapor injected into the lower part of the column is subsequently contacted in succession with a mixture of nitric acid and a portion of the dehydrating agent to further increase the strength of the nitric acid vapor, then with a third portion of the dehydrating agent and finally a small reflux of concentrated "strong" nitric acid to remove further water and residual dehydrating agent from the concentrated "strong" nitric acid vapor in the upper part of the column. The spent dehydrating agent is reconcentrated by flashing under vacuum or alternatively through evaporative cooling with air without further substantial energy input, and is recycled back to the nitric acid concentration column without being cooled, avoiding consequent rejection of energy. The preferred dehydrating agents are aqueous solutions of sulfuric acid and of magnesium nitrate.
摘要翻译: 一个集中的“弱”硝酸浓缩连续过程,同时重新使用用于破坏硝酸共沸物的废脱水剂以获得“强”硝酸,其涉及硝酸浓度的直接耦合与废脱水的再浓缩 代理,以便需要更少的能量输入。 进料“弱”硝酸的主要比例在逆流进入塔中以与大量脱水剂接触之前蒸发,这种蒸发是能量输入的两个主要来源之一,第二个是通过再沸器 列的底部。 能量输入通过强硝酸蒸气和水蒸气冷凝的能量排除来平衡。 随后将注入到塔底部的硝酸蒸汽与硝酸和一部分脱水剂的混合物连续接触,以进一步提高硝酸蒸气的强度,然后用第三部分脱水剂 最后是浓缩“强”硝酸的小回流,从塔的上部浓缩的“强”硝酸蒸气中除去进一步的水和残留的脱水剂。 用过的脱水剂通过在真空下闪蒸或通过空气的蒸发冷却而不再进一步大量的能量输入而再次浓缩,并且被再循环回硝酸浓缩塔而不被冷却,从而避免随之而来的能量的排斥。 优选的脱水剂是硫酸和硝酸镁的水溶液。
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公开(公告)号:US5313009A
公开(公告)日:1994-05-17
申请号:US135569
申请日:1993-10-14
IPC分类号: B01J19/24 , B01J19/26 , C07C201/08 , C07C205/06 , C07C205/12 , C07C201/00 , B01D3/00
CPC分类号: B01J19/2415 , B01J19/26 , C07C201/08 , B01J2219/00081 , B01J2219/00159 , B01J2219/00166 , B01J2219/00186
摘要: A continuous process to nitrate a nitratable aromatic compound in a nitronium ion solution in a nitrator. The process comprises feeding into the nitrator nitronium ion solution of a composition within an area defined by connecting three points in a ternary phase diagram of nitric acid, sulfuric acid and water. The three points correspond to first about 82% of sulfuric acid and 18% nitric acid, secondly about 55% sulfuric acid and about 45% water and, thirdly, 100% sulfuric acid, with the nitric acid preferably being below about 3%. The nitratable aromatic compound is introduced in a manner such that a fine emulsion of hydrocarbon in the nitronium ion solution is formed with the hydrocarbon evenly distributed in the acid phase. The acid and the nitratable aromatic compound are brought into intimate contact in a plug-flow nitrator that contains mixing elements.
摘要翻译: 在氮化器中硝酸根离子溶液中硝化可硝化芳族化合物的连续方法。 该方法包括在硝酸,硫酸和水的三元相图中连接三个点所限定的区域内的组合物的硝化器硝鎓离子溶液中进料。 三点对应于首先约82%的硫酸和18%的硝酸,其次约55%的硫酸和约45%的水,以及第三种是100%的硫酸,硝酸优选低于3%左右。 引入可硝化芳族化合物,使得在硝酸根离子溶液中形成烃的精细乳液,其中均匀分布在酸相中的烃形成。 酸和可硝化芳香族化合物在包含混合元件的活塞式硝化器中紧密接触。
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公开(公告)号:US09139509B2
公开(公告)日:2015-09-22
申请号:US13636478
申请日:2011-02-17
申请人: Alfred A. Guenkel , Sergio Berretta
发明人: Alfred A. Guenkel , Sergio Berretta
IPC分类号: C07C205/00 , C07B41/00 , C07C201/16
CPC分类号: C07C201/16 , Y02P20/582 , C07C205/06 , C07C205/12
摘要: A method and apparatus for removing non-aromatic impurities from non-nitrated aromatic reactant in a nitration production process, in which process an aromatic reactant is nitrated (100) to produce a nitrated aromatic product using a molar excess of the aromatic reactant, and non-nitrated aromatic reactant is recovered (102) from the produced nitrated aromatic product and is recycled (104) for use in the nitration production process. A portion of the removed excess non-nitrated aromatic reactant is diverted (106) and subjected to nitration (108). The nitrated stream may be further processed by separating out the spent acids (110) and the non-aromatic impurities (116). These streams may be sent (114, 118) to a suitable location in the nitration production train.
摘要翻译: 一种用于在硝化生产过程中从非硝化芳族反应物除去非芳族杂质的方法和装置,其中芳族反应物被硝化(100)以产生使用摩尔过量的芳族反应物的硝化芳族产物, 硝酸芳香族反应物(102)从所生产的硝化芳香族产物中回收(102)并循环使用(104),用于硝化生产过程。 去除的过量非硝化芳族反应物的一部分被转移(106)并进行硝化(108)。 可以通过分离废酸(110)和非芳族杂质(116)来进一步处理硝化物流。 这些流可以被发送(114,118)到硝化生产列车中的合适位置。
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公开(公告)号:US20130018210A1
公开(公告)日:2013-01-17
申请号:US13636478
申请日:2011-02-17
申请人: Alfred A. Guenkel , Sergio Berretta
发明人: Alfred A. Guenkel , Sergio Berretta
IPC分类号: C07C201/08 , B01J19/00
CPC分类号: C07C201/16 , Y02P20/582 , C07C205/06 , C07C205/12
摘要: A method and apparatus for removing non-aromatic impurities from non-nitrated aromatic reactant in a nitration production process, in which process an aromatic reactant is nitrated (100) to produce a nitrated aromatic product using a molar excess of the aromatic reactant, and non-nitrated aromatic reactant is recovered (102) from the produced nitrated aromatic product and is recycled (104) for use in the nitration production process. A portion of the removed excess non-nitrated aromatic reactant is diverted (106) and subjected to nitration (108). The nitrated stream may be further processed by separating out the spent acids (110) and the non-aromatic impurities (116). These streams may be sent (114, 118) to a suitable location in the nitration production train.
摘要翻译: 一种用于在硝化生产过程中从非硝化芳族反应物除去非芳族杂质的方法和装置,其中芳族反应物被硝化(100)以产生使用摩尔过量的芳族反应物的硝化芳族产物, 硝酸芳香族反应物(102)从所生产的硝化芳香族产物中回收(102)并循环使用(104),用于硝化生产过程。 去除的过量非硝化芳族反应物的一部分被转移(106)并进行硝化(108)。 可以通过分离废酸(110)和非芳族杂质(116)来进一步处理硝化物流。 这些流可以被发送(114,118)到硝化生产列车中的合适位置。
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