公开(公告)号：US5645806A

公开(公告)日：1997-07-08

申请号：US274694

申请日：1994-07-14

申请人： Klaus Hess ,  Roland Spahl ,  Hans Christoph Horn ,  Ingo H. Dorn ,  Gunter Dinkhauser ,  Hans-Ingo Joschek

发明人： Klaus Hess ,  Roland Spahl ,  Hans Christoph Horn ,  Ingo H. Dorn ,  Gunter Dinkhauser ,  Hans-Ingo Joschek

IPC分类号： B01D53/86 ,  C01B7/00

CPC分类号： B01D53/8662

摘要： A process for decomposing organohalogen compounds which are present in dust-laden gases which have a carbon content of less than 0.6% by weight, by oxidative breakdown with the aid of solid catalysts suitable for this purpose, whereina) the dust is deposited from the gases at 250.degree.-500.degree. C., and the dust-free gas is passed together with oxygen or an oxygen-containing gas over the catalyst, orb) the deposition of the dust takes place at below 250.degree. C., the organohalogen compounds are desorbed from the dust in an oxygen-containing gas stream at 250.degree.-500.degree. C., and the gas stream is passed over the catalyst, orc) the dust-laden gas is passed in the presence of oxygen over the catalyst at 250.degree.-500.degree. C., and the dust is subsequently removed.

摘要翻译： 通过借助于适合于此目的的固体催化剂的氧化分解，分解存在于含碳量低于0.6重量％的含尘气体中的有机卤素化合物的方法，其中a）从 气体在250°-500℃，无尘气体与氧气或含氧气体一起通过催化剂，或b）灰尘的沉积发生在250℃以下，有机卤素 化合物在250-500℃的含氧气流中从灰尘中解吸，气流通过催化剂，或c）含尘气体在氧气存在下通过催化剂 在250°-500℃下，随后除去灰尘。

公开(公告)号：US4093668A

公开(公告)日：1978-06-06

申请号：US452565

申请日：1974-03-19

申请人： Wolfgang Reiss ,  Hans-Ingo Joschek ,  Rudolf Schnur ,  Siegfried Winderl ,  Juergen Dehler ,  Herwig Hoffmann

发明人： Wolfgang Reiss ,  Hans-Ingo Joschek ,  Rudolf Schnur ,  Siegfried Winderl ,  Juergen Dehler ,  Herwig Hoffmann

IPC分类号： C07C29/42 ,  B01J31/00 ,  C07B61/00 ,  C07C27/00 ,  C07C33/046 ,  C07C67/00 ,  C07C29/00

CPC分类号： C07C33/046 ,  C08K3/36

摘要： Butynediol is prepared by reacting acetylene and formaldehyde in contact with a heavy metal acetylide as catalyst, in the liquid phase by the Reppe method. Acetylene is fed upwardly through a suspension of the catalyst in formaldehyde at such a rate that it is virtually completely consumed and a liquid zone containing no catalyst is formed above the suspension.

摘要翻译： 丁炔二醇通过使乙炔和甲醛与重金属乙炔化物作为催化剂接触，通过Reppe法在液相中反应制备。 将乙炔向上通过催化剂在甲醛中的悬浮液，其速率实质上完全消耗，并且在悬浮液上形成不含催化剂的液体区域。

公开(公告)号：US4014914A

公开(公告)日：1977-03-29

申请号：US518076

申请日：1974-10-25

申请人： Hans Joachim Pistor ,  Herwig Hoffmann ,  Hans-Ingo Joschek ,  Gotthilf Wenner

发明人： Hans Joachim Pistor ,  Herwig Hoffmann ,  Hans-Ingo Joschek ,  Gotthilf Wenner

IPC分类号： C07C41/28 ,  C08G18/76 ,  C07C119/02

CPC分类号： C08G18/7664 ,  C07C263/10

摘要： Production of 4,4'-diphenylmethane diisocyanate and a mixture of diisocyanates and polyisocyanates by the phosgenation of pure 4,4'-diaminodiphenylmethane and a mixture of diamines and polyamines. 4,4'-Diaminodiphenylmethane is obtained by distillation of the mixture of products obtained from the reaction of aniline with formaldehyde and crystallization of the distillate from a solvent. The combined distillation residue and mother liquor from the crystallization form the mixture for reaction with phosgene to produce a mixture of diisocyanates and polyiisocyanates. This process produces a highly pure 4,4'-diphenylmethane diisocyanate which is particularly suitable for the production of polyurethanes serving as intermediates in the manufacture of rigid foams or as glue.

摘要翻译： 通过纯的4,4'-二氨基二苯基甲烷和二胺和多胺的混合物的光气化生产4,4'-二苯基甲烷二异氰酸酯和二异氰酸酯和多异氰酸酯的混合物。 通过蒸馏从苯胺与甲醛的反应获得的产物的混合物和馏出液从溶剂中的结晶，得到4,4'-二氨基二苯基甲烷。 合并的蒸馏残余物和母液从结晶形成混合物以与光气反应以产生二异氰酸酯和聚异氰酸酯的混合物。 该方法产生高纯度的4,4'-二苯基甲烷二异氰酸酯，其特别适用于生产用于制造刚性泡沫或作为胶水的中间体的聚氨酯。