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    • 4. 发明申请
    • System and process for purifying an aqueous solution of crude caprolactam
    • 用于纯化粗己内酰胺水溶液的系统和方法
    • US20080058513A1
    • 2008-03-06
    • US11897883
    • 2007-08-31
    • Chien-Hsien LiShou-Li Luo
    • Chien-Hsien LiShou-Li Luo
    • C07D201/16
    • C07D223/10C07D201/16
    • A system for purifying an aqueous solution of crude caprolactam is provided, which includes a filtration zone (A), an inspection unit (B), a purification zone (C), and a first temporary storage tank (D). The filtration zone (A) contains a filtration apparatus though which an aqueous solution of crude caprolactam is filtered to remove ionic impurities therein, so as to obtain caprolactam-containing filtrate; the inspection unit (B) is used for judging the filtrate from the filtration zone (A) meets the preset inspection standards; the purification zone(C) is used for concentrating and further purifying filtrate meeting the preset inspection standards, thereby forming a final caprolactam product; and the first temporary storage tank (D) is used for receiving the filtrate not meeting the preset inspection standards, which is then mixed with the aqueous solution of crude caprolactam and delivered back to the filtration zone (A).
    • 提供了一种用于纯化粗己内酰胺水溶液的体系,其包括过滤区(A),检查单元(B),净化区(C)和第一临时储罐(D)。 过滤区(A)含有过滤装置,通过其过滤粗己内酰胺水溶液以除去其中的离子杂质,得到含己内酰胺的滤液; 检查单元(B)用于判断过滤区域(A)的滤液符合预设的检验标准; 净化区(C)用于浓缩并进一步净化满足预设检查标准的滤液,从而形成最终的己内酰胺产品; 并且第一临时储罐(D)用于接收不符合预设检查标准的滤液,然后将其与粗己内酰胺水溶液混合并输送到过滤区(A)。
    • 5. 发明授权
    • Method for the manufacture of caprolactam from waste containing polyamides
    • 从含有聚酰胺的废物制造己内酰胺的方法
    • US07173127B2
    • 2007-02-06
    • US10457831
    • 2003-06-09
    • Claus BornRudolf K{hacek over (a)}mpfJoachim SeeligReinhard Wolf
    • Claus BornRudolf K{hacek over (a)}mpfJoachim SeeligReinhard Wolf
    • C07D201/16
    • C07D201/12
    • This invention relates to a continuous and efficient method for the manufacture of highly pure caprolactam suitable for the polycondensation of Polyamide 6 (polycaprolactam) from polyamide waste. In particular the invention relates to a method for the manufacture of caprolactam from waste containing polyamides, including the steps a) depolymerisation of the waste containing polyamides, whereby a caprolactam raw material and a flow containing secondary constituents or additives is obtained, b) at least one distillation of the caprolactam raw material, and c) at least one crystallisation of the caprolactam material obtained in step b), by which means caprolactam is obtained, whereby at least part of the caprolactam obtained in step c) with a permanganate number of
    • 本发明涉及用于制备适用于聚酰胺废物聚酰胺6(聚己内酰胺)缩聚的高纯度己内酰胺的连续和有效的方法。 具体地说,本发明涉及一种从含有聚酰胺的废物中制造己内酰胺的方法,包括以下步骤:a)对含有废物的聚酰胺进行解聚,由此得到己内酰胺原料和含有二级成分或添加剂的流体,b)至少 己内酰胺原料的一次蒸馏,和c)步骤b)中获得的己内酰胺材料的至少一种结晶,通过该方法获得己内酰胺,由此至少部分步骤c)中获得的己内酰胺的高锰酸盐数目< 10000秒 并且在解聚之前和/或期间,将含有<85%的UV透射率加入到含废物的聚酰胺中。
    • 6. 发明申请
    • Process for recovering and purifying caprolactam from an organic solvent
    • 从有机溶剂中回收和纯化己内酰胺的方法
    • US20040110943A1
    • 2004-06-10
    • US10468263
    • 2004-01-14
    • Maria Louisa Christina Dsinter-De HondtJoannes Albertus Wilhelmus Lemmens
    • C07D201/16
    • C07D201/16
    • Process for recovering caprolactam from a solution comprising caprolactam dissolved in an organic solvent, said process comprising: a) washing the solution with water or an aqueous alkaline solution, resulting in a washed solution comprising caprolactam and organic solvent and in a washing residue, b) evaporating organic solvent from the washed solution, resulting in caprolactam product, c) optionally, hydrogenating the caprolactam product, d) optionally, evaporating water from the caprolactam product, e) distilling the caprolactam product to recover caprolactam and a distillation residue, f) extracting the distillation residue with an organic solvent in the presence of water to obtain (i) an extract comprising caprolactam dissolved in organic solvent and (ii) an aqueous effluent, and g) recycling the extract to step a) or b).
    • 从包含溶解在有机溶剂中的己内酰胺的溶液中回收己内酰胺的方法,所述方法包括:a)用水或碱性水溶液洗涤溶液,得到包含己内酰胺和有机溶剂的洗涤溶液,并在洗涤残渣中,b) 从洗涤的溶液中蒸发有机溶剂,得到己内酰胺产物,c)任选地使己内酰胺产物氢化,d)任选地从己内酰胺产物蒸发水,e)蒸馏己内酰胺产物以回收己内酰胺和蒸馏残渣,f) 在水存在下用有机溶剂蒸馏残余物,以获得(i)包含溶解在有机溶剂中的己内酰胺和(ii)含水流出物的提取物,和g)将提取物再循环到步骤a)或b)。
    • 7. 发明申请
    • Method for separating ammoniac
    • 分离氨的方法
    • US20030143146A1
    • 2003-07-31
    • US10332585
    • 2003-01-10
    • Hermann Luyken
    • C01C001/00C07D201/16
    • C07C231/24C07D201/16
    • A process is provided for the separation of ammonia (I) from mixtures (II) containing ammonia (I) and an amide (IV) selected from the group consisting of a lactam (IVa), an oligomer (IVb) and a polymer (IVc) with amide groups in the main chain, said amide (IV) having been obtained by reacting educts (III), selected from the group consisting of nitrites (IIIa), amines (IIIb), amino nitrites (IIIc) and amino amides (IIId), with water, wherein a) the educt (III) is reacted with water in the liquid phase, in the presence of an organic liquid diluent (V), to give a mixture (II) containing the amide (IV) and the ammonia (I), the diluent (V) exhibiting a miscibility gap with water under certain quantity, pressure and temperature conditions, b) the mixture (II) is converted under quantity, pressure and temperature conditions such that the diluent (V) and the water are in liquid form and exhibit a miscibility gap, to give a two-phase system consisting of a phase (VII) containing a higher proportion of diluent (V) than water, and a phase (VIII) containing a higher proportion of water than diluent (V), c) the phase (VII) is separated from the phase (VIII), d) all or part of the ammonia present in the phase (VII) is separated off by extraction (a) with a water-containing mixture (IX) to give an aqueous mixture (X) containing the ammonia which has been separated off, and a mixture (XI) containing less ammonia than the phase (VII), and e) the diluent (V), any residual ammonia and any by-products selected from the group consisting of low-boiling components, high-boiling components and unreacted compounds (III) are separated from the mixture (XI) to give the amide (IV).
    • 提供了一种从含有氨(I)和选自内酰胺(IVa),低聚物(IVb)和聚合物(IVc)的酰胺(IV)的混合物(II)中分离氨(I)的方法 所述酰胺(IV)是通过使选自由亚硝酸盐(IIIa),胺(IIIb),氨基亚硝酸盐(IIIc)和氨基酰胺(IIId)组成的组的离析物(III)反应而获得的 ),其中a)在液相中,在有机液体稀释剂(V)的存在下,水解(III)与水反应,得到含有酰胺(IV)和氨的混合物(II) (I)中,稀释剂(V)在一定量,压力和温度条件下表现出与水的混溶性间隙,b)混合物(II)在数量,压力和温度条件下转化,使得稀释剂(V)和水 呈液态并显示混溶性间隙,得到由含有较高比例的相(VII)组成的两相体系 稀释剂(V)比水,和含有比稀释剂(V)更高比例的水的相(VIII),c)相(VII)从相(VIII)分离,d)全部或部分 通过用含水混合物(IX)萃取(a)分离相(VII)中存在的氨,得到含有已分离出的氨的含水混合物(X)和含有较少量的混合物(XI) (VII)中的氨,e)稀释剂(V),任选的残余氨和选自低沸点组分,高沸点组分和未反应化合物(III)的任何副产物与 混合物(Ⅺ),得到酰胺(Ⅳ)。
    • 10. 发明授权
    • Recovery of caprolactam from oligomers and/or polymers of caprolactam
    • 从己内酰胺的低聚物和/或聚合物中回收己内酰胺
    • US5700358A
    • 1997-12-23
    • US396623
    • 1995-03-01
    • Hugo FuchsJosef RitzGerald Neubauer
    • Hugo FuchsJosef RitzGerald Neubauer
    • C07D201/12C07D201/16C08G69/14C08G69/46B01D3/34
    • C07D201/12C07D201/16
    • Caprolactam is recovered from oligomers and/or polymers of caprolactam by cleavage of oligomers and/or polymers of caprolactam and subsequent working up by distillation of the caprolactam obtained in the cleavage, by a process including (a) cleaving oligomers and/or polymers of caprolactam to obtain an aqueous reaction mixture which contains caprolactam, (b) removing water from the reaction mixture obtained under (a) to obtain a residue, (c) distilling the residue obtained under (b) in an acidic medium and (d) then distilling the distillate in an alkaline medium to obtain caprolactam, or (c') distilling the residue obtained under (b) in an alkaline medium and (d') then distilling the distillate in an acidic medium to obtain caprolactam.
    • 通过裂解己内酰胺的低聚物和/或聚己内酯并随后通过蒸馏在切割中获得的己内酰胺来处理己内酰胺从己内酰胺的低聚物和/或聚合物中回收己内酰胺,方法包括(a)裂解己内酰胺的低聚物和/或聚合物 得到含有己内酰胺的水性反应混合物,(b)从(a)得到的反应混合物中除去水,得到残渣,(c)将酸性介质中的(b)得到的残渣蒸馏,然后蒸馏 在碱性介质中的馏出物得到己内酰胺,或(c')将在(b)获得的残余物在碱性介质中蒸馏,然后(d'),然后在酸性介质中蒸馏出馏出物,得到己内酰胺。