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公开(公告)号：EP0152843A2
公开(公告)日：1985-08-28
申请号：EP85101069.4
申请日：1985-02-01
IPC分类号： C07D201/16
CPC分类号： C07D201/16
摘要： The invention is concerned with a method of purifying caprolactam as obtained by Beckmann transposition or by nitrosation of cyclohexyl compounds, characterized in that it comprises the following steps:
a) the caprolactam oil is treated with ammonia to obtain a pH in the 8 to 10 range;
b) the caprolactam in water-ammonia solution yielded by (a) is extracted with toluene;
(C 1 ) any caprolactam still in the toluene solution yielded by (b) is treated with NaOH;
(C 2 ) the acqueous phase left over from the extraction with toluene (b) is removed.-
2.发明公开Process for the removal of nitrogen oxides (nx oy) from waste gases of ammonia oxidation plants 失效Verfahrenfürdie Entfernung von Stickoxiden（NX OY）aus Abgasen von Ammoniakoxydationsanlagen。
公开(公告)号：EP0234248A2
公开(公告)日：1987-09-02
申请号：EP87100626.8
申请日：1987-01-19
IPC分类号： B01D53/34
CPC分类号： B01D53/56 , C01B21/094
摘要： This invention relates to a process for the remotion of the nitrogen oxides contained in the waste gases coming from the catalytic oxidation plants of ammonia.
The process includes the absorption of the gases in a mixture of sulphuric and nitric acid.
The process allows to obtain the double advantage to eliminate the dangerous nitrogen oxides pollution and to recovery a very useful product, the nitrosyl hydrogen sulphate.摘要翻译： 本发明涉及一种用于使来自氨的催化氧化装置的废气中所含的氮氧化物残留的方法。 该方法包括在硫酸和硝酸的混合物中吸收气体。 该过程允许获得双重优点，以消除危险的氮氧化物污染，并回收非常有用的产品，硫酸亚硫酰基硫酸盐。
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公开(公告)号：EP0124709A1
公开(公告)日：1984-11-14
申请号：EP84102397.1
申请日：1984-03-06
摘要： The invention is concerned with a method of purifying benzoic acid, as obtained by catalytic oxidation of toluene and purification by rectification with the secondary streams being cycled back into the oxidation reactor, characterized in that the secondary streams flowing out of the stripping column undergo the following sequential steps: (a) at least one distillation and at least one crystallization in an organic solvent; (b) scrubbing of the crystals obtained from (a) with the same solvent as in (a); (c) cycling of the mother liquors from crystallization in (a) plus the scrubbing liquors as in (b) back into the dissolver) (d) further scrubbing of the crystals from (b) with the same solvent as in (a)-and cycling back of the scrubbing liquors, the crystals scrubbed as in (d) being optionally (d1) further scrubbed with water.
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4.发明公开Process for the remotion of nitrogen oxides (nx oy) from waste gases of ammonia oxidation plants 失效从硝酸氧化植物废气中去除氮氧化物（NX OY）的方法
公开(公告)号：EP0234248A3
公开(公告)日：1988-04-20
申请号：EP87100626
申请日：1987-01-19
IPC分类号： B01D53/34
CPC分类号： B01D53/56 , C01B21/094
摘要： This invention relates to a process for the remotion of the nitrogen oxides contained in the waste gases coming from the catalytic oxidation plants of ammonia. The process includes the absorption of the gases in a mixture of sulphuric and nitric acid. The process allows to obtain the double advantage to eliminate the dangerous nitrogen oxides pollution and to recovery a very useful product, the nitrosyl hydrogen sulphate.
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5.发明公开A method of preparing omega -lactams, in particular caprolactam 失效维他命Zur Herstellung von omega-Lactamen，insbesondere己内酰胺。
公开(公告)号：EP0197408A2
公开(公告)日：1986-10-15
申请号：EP86103982.4
申请日：1986-03-22
发明人： Senni, Paolo , Zuliani, Leandro , Ferruzzi, Sergio
IPC分类号： C07D201/10
CPC分类号： C07D201/08
摘要： A method of preparing ω -lactams, in particular caprolactam, comprising: a step of premixing cycloaliphatic acids having the formula
where n = 3 - 13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step of reaction with the addition of a very small amount of water corresponding to a molar ratio U = H 2 O/SO 3 within the 0.1 to 0.9 range; and the step of reclaiming the unreacted cycloaliphatic acid. The method affords improved output from the lactamization reaction and reduced byproducts.摘要翻译： 一种制备ω-内酰胺，特别是己内酰胺的方法，包括：用脱水剂将具有式“IMAGE”其中n = 3-13的脂环族酸预混合的步骤; 与亚硝化剂反应的第一步; 第二步反应加入相当于0.1至0.9范围内的摩尔比U = H 2 O / SO 3的非常少量的水; 以及回收未反应的脂环族酸的步骤。 该方法提高了内酰胺化反应的产率和减少的副产物。
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6.发明授权Process for the removal of nitrogen oxides (nx oy) from waste gases of ammonia oxidation plants 失效从硝酸氧化厂的废气中去除氮氧化物（NX OY）的方法
公开(公告)号：EP0234248B1
公开(公告)日：1990-09-12
申请号：EP87100626.8
申请日：1987-01-19
IPC分类号： B01D53/34
CPC分类号： B01D53/56 , C01B21/094
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7.发明公开A method of preparing omega -lactams, in particular caprolactam 失效制备OMEGA-LACTAMS，特别是CAPROLACTAM的方法
公开(公告)号：EP0197408A3
公开(公告)日：1990-03-14
申请号：EP86103982.4
申请日：1986-03-22
发明人： Senni, Paolo , Zuliani, Leandro , Ferruzzi, Sergio
IPC分类号： C07D201/10
CPC分类号： C07D201/08
摘要： A method of preparing ω -lactams, in particular caprolactam, comprising: a step of premixing cycloaliphatic acids having the formula
where n = 3 - 13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step of reaction with the addition of a very small amount of water corresponding to a molar ratio U = H 2 O/SO 3 within the 0.1 to 0.9 range; and the step of reclaiming the unreacted cycloaliphatic acid. The method affords improved output from the lactamization reaction and reduced byproducts.摘要翻译： 一种制备ω-内酰胺，特别是己内酰胺的方法，包括：用脱水剂将具有式“IMAGE”其中n = 3-13的脂环族酸预混合的步骤; 与亚硝化剂反应的第一步; 第二步反应加入相当于0.1至0.9范围内的摩尔比U = H 2 O / SO 3的非常少量的水; 以及回收未反应的脂环族酸的步骤。 该方法提高了内酰胺化反应的产率和减少的副产物。
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公开(公告)号：EP0152843A3
公开(公告)日：1987-05-27
申请号：EP85101069
申请日：1985-02-01
IPC分类号： C07D201/16
CPC分类号： C07D201/16
摘要： The invention is concerned with a method of purifying caprolactam as obtained by Beckmann transposition or by nitrosation of cyclohexyl compounds, characterized in that it comprises the following steps:
a) the caprolactam oil is treated with ammonia to obtain a pH in the 8 to 10 range; b) the caprolactam in water-ammonia solution yielded by (a) is extracted with toluene; (C 1 ) any caprolactam still in the toluene solution yielded by (b) is treated with NaOH; (C 2 ) the acqueous phase left over from the extraction with toluene (b) is removed.
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