专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4054562A Process for the manufacture of lactams 失效
标题翻译：内酰胺的制造工艺
公开(公告)号：US4054562A
公开(公告)日：1977-10-18
申请号：US261219
申请日：1972-06-09
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/50 , C01C1/24 , C07D201/16 , C07D201/04
CPC分类号： C07D201/16 , C01B17/504 , C01C1/24 , Y02P20/129
摘要： In a process for manufacturing a lactam which includes rearranging a cycloalkanone-oxime with sulfuric acid to form the lactam, neutralizing the rearrangement mixture with ammonia to form ammonium sulfate, and separating the lactam and the ammonium sulfate, the improvement which comprises:A. heating at least a portion of the ammonium sulfate to a temperature of 240.degree. - 460.degree. C to form ammonia and ammonium bisulfate;B. separating the ammonia from the ammonium bisulfate;C. recycling the ammonia to neutralize the rearrangement mixture;D. burning the ammonium bisulfate at a temperature of 850.degree. - 1250.degree. C to form an SO.sub.2 -containing gas;E. oxidizing the SO.sub.2 -containing gas to form sulfuric acid; andF. recycling the sulfuric acid to the rearrangement stage.
摘要翻译：在制备内酰胺的方法中，其中包括用硫酸重排环烷酮肟以形成内酰胺，用氨中和重排混合物形成硫酸铵，并分离内酰胺和硫酸铵，其改进包括：

2. 发明授权

US3954955A Process for working up the wash solution obtained in the washing of SO.sub.2 -containing off-gases 失效
标题翻译：处理在洗涤SO（HD 2（含B的废气）中获得的洗涤溶液的方法
公开(公告)号：US3954955A
公开(公告)日：1976-05-04
申请号：US284709
申请日：1972-08-30
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/60 , C01B17/76 , C01B17/50
CPC分类号： C01B17/76 , C01B17/60
摘要： In a process which comprises scrubbing an SO.sub.2 -containing gas with an aqueous ammonia solution to form ammonium sulfite and ammonium bisulfite as reaction products, neutralizing said reaction products with sulfuric acid to form SO.sub.2 and aqueous ammonium sulfate, and concentrating the resultant aqueous ammonium sulfate by evaporation, the improvement which comprises:A. heating the concentrated aqueous ammonium sulfate to a temperature of 900.degree.-1250.degree.C in a combustion chamber burning a carbon or sulfur containing fuel, in the presence of sufficient oxygen to maintain an oxygen content of 1-10 vol % in the gas exiting from the combustion chamber, to form a hot split gas consisting essentially of sulfur dioxide, sulfur trioxide, molecular nitrogen, molecular oxygen and water vapor; andB. heat exchanging the hot split gas with the aqueous ammonium sulfate to evaporate the aqueous ammonium sulfate to a concentrate having a water content of less than 55 wt. %, thereby cooling said hot split gas.The split gas can be furhter worked up for any purpose which an SO.sub.2 -containing gas is suitable, e.g., for the production of sulfuric acid.
摘要翻译：在包括用氨水溶液洗涤含SO 2的气体以形成亚硫酸铵和亚硫酸氢铵作为反应产物的方法中，用硫酸中和所述反应产物以形成SO 2和硫酸铵水溶液，并将所得的硫酸铵水溶液浓缩蒸发，其改进包括：

3. 发明授权

US3943237A Production of sulfuric acid from the scrubbing solution obtained in the desulfurization of coke-oven gas 失效
标题翻译：在焦炉煤气脱硫中得到的洗涤溶液中生产硫酸
公开(公告)号：US3943237A
公开(公告)日：1976-03-09
申请号：US406799
申请日：1973-10-16
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/60 , C01B17/58 , C01B17/50
CPC分类号： C01B17/58 , Y02P20/129
摘要： Scrubbing solutions containing ammonium salts of weak acids are mixed with sufficient sulfuric acid to react with all the salts; the resultant solutions are evaporated by direct heat exchange with a hot SO.sub.2 -containing combustion gas to a 40-78% water content and combusted at 800.degree.-1,250.degree.C to produce the SO.sub.2 -containing combustion gas used in the evaporation step. The SO.sub.2 in the combustion gas can be processed in a conventional manner.
摘要翻译：含有弱酸铵盐的洗涤溶液与足够的硫酸混合，与所有盐反应; 通过与热的含SO 2的燃烧气体直接热交换使得到的溶液蒸发至40-78％的水含量，并在800-150℃下燃烧以产生用于蒸发步骤的含SO 2的燃烧气体。可以以常规方式处理燃烧气体中的SO2。

4. 发明授权

US3950502A Process for working up the scrubbing solution obtained in the scrubbing of So.sub.2 -containing waste gases 失效
标题翻译：处理在洗涤So（hd 2 {b-含有废气中）中获得的洗涤溶液的方法
公开(公告)号：US3950502A
公开(公告)日：1976-04-13
申请号：US418273
申请日：1973-11-23
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/60 , C01B17/76 , C01B17/50
CPC分类号： C01B17/60 , C01B17/76
摘要： Process for working up the scrubbing solution obtained during the scrubbing of SO.sub.2 -containing waste gases, which can also contain SO.sub.3, with the use of ammonia, by evaporation in direct heat exchange with hot cracked gas to a water content of between 15 and 55% by weight, cracking of the thus-evaporated mixture at temperatures of between 900.degree. and 1250.degree. C. with the concomitant combustion of a carbon- and/or sulfur-containing fuel to an SO.sub.2 -containing gas, and processing of the cracked gas, after utilization for evaporation purposes, by contact oxidation to sulfuric acid in accordance with U.S. patent application Ser. 284,709 filed Aug. 30, 1972, characterized in that the scrubbing solution is mixed, prior to or during the evaporation, with a quantity of sulfuric acid sufficient for the liberation of SO.sub.2 from 0-83% of the sulfite and/or bisulfite present in the solution.
摘要翻译：在用热裂解气体与热裂解气体直接热交换蒸发至含水量为15％至55％之间的过程中，通过蒸发除去也可以含有SO 3的含SO 2的废气在洗涤期间获得的洗涤溶液的处理方法，，在900〜1250℃的温度下将这样蒸发的混合物裂解，同时伴随着含碳和/或含硫燃料与含SO 2的气体的燃烧，以及加工裂化气体，用于蒸发目的后，按照美国专利申请Ser。 284709，1972年8月30日提交，其特征在于，在蒸发之前或期间，将洗涤溶液与足量的硫酸一起混合，所述硫酸足以释放存在于亚硫酸盐中的0-83％的亚硫酸盐和/或亚硫酸氢盐解决方案。

5. 发明授权

US4049646A Process for the manufacture of lactams 失效
标题翻译：内酰胺的制造工艺
公开(公告)号：US4049646A
公开(公告)日：1977-09-20
申请号：US261220
申请日：1972-06-09
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/50 , C01C1/24 , C07D201/16 , C07D201/04
CPC分类号： C07D201/16 , C01B17/504 , C01C1/24 , Y02P20/129
摘要： In a process for manufacturing a lactam which includes rearranging a cycloalkanone-oxime with sulfuric acid to form said lactam, neutralizing the rearrangement mixture with ammonia to form ammonium sulfate, and separating said lactam and said ammonium sulfate, the improvement which comprises:A. forming the ammonium sulfate into finely divided particles;B. burning the particles at a temperature of 850.degree. - 1250.degree. C. to form an SO.sub.2 -containing gas;C. oxidizing the SO.sub.2 -containing gas to form sulfuric acid; andD. recycling at least a portion of the sulfuric acid to the cycloalkanone-oxime rearrangement step.No external source of sulfuric acid is required. A portion of the SO.sub.2 -containing gas can be used for the manufacture of hydroxylamine sulfate, in which case no external source of SO.sub.2 need be required.
摘要翻译：在制造内酰胺的方法中，其包括用硫酸重排环烷酮肟以形成所述内酰胺，用氨中和重排混合物形成硫酸铵，并分离所述内酰胺和所述硫酸铵，其改进包括：

6. 发明授权

US3944657A Sulfur dioxide from by-product ammonium sulfate solutions 失效
标题翻译：副产物硫酸铵溶液中的二氧化硫
公开(公告)号：US3944657A
公开(公告)日：1976-03-16
申请号：US323895
申请日：1973-01-15
申请人： Herbert Furkert
发明人： Herbert Furkert
IPC分类号： C01B17/50 , C01B17/60 , C01C1/249
CPC分类号： C01C1/249 , C01B17/504 , C01B17/60
摘要： In a process of concentrating an aqueous solution of ammonium sulfate and burning resultant concentrate at 850.degree.-1250.degree.C to form a combustion gas containing SO.sub.2, the improvement which comprises:Conducting said concentrating by passing said combustion gas in direct contact with said aqueous solution of ammonium sulfate to evaporate water from said solution. If the concentrate is a slurry, it can be sent in total to the combustion step or it can be centrifuged with a recycle of mother liquor to the concentrating step. The evaporation can also be conducted so that substantially dry ammonium sulfate is obtained.
摘要翻译：在将硫酸铵水溶液浓缩并在850°-1250℃下燃烧得到的浓缩物形成含有SO 2的燃烧气体的过程中，其改进包括：

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式