公开(公告)号：US3663167A

公开(公告)日：1972-05-16

申请号：US3663167D

申请日：1970-09-21

Applicant: HERCULES INC

Inventor： VRY FRANK E DE

IPC: C01B21/26

CPC classification number: C01B21/26 ,  B01J2219/00078 ,  B01J2219/00094 ,  B01J2219/00159 ,  B01J2219/00162 ,  B01J2219/00182 ,  C01B21/262

Abstract: Process, integrated with ammonia air oxidation, for the manufacture of nitric oxide of at least 99 percent purity comprising the steps of (1) effecting the ammonia oxidation, (2) maintaining maximum NO content in the oxidation effluent, and then contacting the effluent with nitric acid to convert the NO to NO2, (3) cooling the NO2 containing gas product to condense the NO2 therefrom as liquid N2O4, (4) passing the liquid N2O4 into a packed converter tower and therein at least partially vaporizing the liquid; passing resulting vaporization product upwardly through the tower packing and passing water or weak nitric acid into the tower and downwardly through the packing in countercurrent flow reaction contact with the vaporization product, and then into the zone of said vaporization and reaction contact with any unvaporized liquid, and vaporization product to convert substantially all of the initially added liquid dinitrogen tetroxide to nitric oxide gas product containing minor contaminant amounts of NO2, HNO3 and water, (5) water-scrubbing the NO2 and HNO3 contaminants from the NO gas product to form resulting water-wet NO gas product containing, on an anhydrous basis, at least 99 percent NO, and (6) dehydrating the water-wet NO gas product to form said NO of at least 99 weight percent purity. Strong nitric acid is formed in the converter tower as by-product.

Abstract translation: 与氨空气氧化相结合的方法，用于制造纯度至少为99％的一氧化氮，包括以下步骤：（1）进行氨氧化，（2）保持氧化流出物中的最大NO含量，然后使流出物与 硝酸将NO转化为NO2，（3）冷却含NO 2气体产物以将NO 2作为液体N2O4冷凝，（4）将液体N2O4通入填料转炉塔并在其中至少部分蒸发液体; 使所产生的蒸发产物向上通过塔填料并将水或弱硝酸通入塔中，并向下通过填料与逆流反应接触蒸发产物，然后进入与任何未蒸发的液体的蒸发和反应接触的区域， 和蒸发产物 - 将基本上所有初始添加的液体四氧化二氮转化成含有少量NO 2，HNO 3和水的少量污染物的一氧化氮气体产物，（5）从NO气体产物中水洗涤NO 2和HNO 3污染物以形成 水无水气体产物，其以无水方式含有至少99％的NO，和（6）使水湿NO气体产物脱水以形成至少99重量％纯度的所述NO。 在转炉塔中形成强硝酸作为副产物。

公开(公告)号：US3576606A

公开(公告)日：1971-04-27

申请号：US3576606D

申请日：1969-07-08

Applicant: HERCULES INC

Inventor： VRY FRANK E DE

IPC: B01J14/00 ,  B01J19/24 ,  C01B21/26 ,  B01J9/02 ,  C01B21/24

CPC classification number: B01J14/00 ,  B01J19/2415 ,  B01J2219/00078 ,  B01J2219/00094 ,  B01J2219/00159 ,  B01J2219/00162 ,  B01J2219/00182 ,  C01B21/262 ,  Y10S261/72

Abstract: A REACTION COLUMN FOR CONTINUOUSLY CONVERTING NITROGEN TETROXIDE INTO ANHYDROUS NITRIC OXIDE OF HIGH PURITY WITH STRONG NITRIC ACID AS A CO-PRODUCT ACCORDING TO THE EQUATION 3NO2+H2O->NO+2HNO3. THE COLUMN IS PACKED AND EVEN DISTRIBUTION OF GAS AND LIQUID THROUGHOUT ITS HEIGHTS IS ACHIEVED BY DISTRIBUTORS AND REDISTRIBUTORS POSITIONED WITHIN THE PACKING IN EFFECTIVE ARRANGEMENT WITH THE NO2 AND H2 FEED INLETS. THE NO2 FEED ENTERS THE COLUMN AS LIQUID N2O4. THE COLUMN FURTHER INCLUDES AN ENTRAINMENT SEPARATOR LOCATED WITHIN THE COLUMN AND ABOVE THE UPPERMOST DISTRIBUTOR AND A HEATING MEANS LOCATED WITHIN SAID COLUMN AT THE BASE THEREOF TO STRIP NO2 FROM THE NITRIC ACID CO-PRODUCT PRIOR TO ITS EGRESS FROM THE COLUMN.