DE46096C - Process for purifying nitric acid and for obtaining the same BEZW. of nitrobenzene from the waste acids of the nitroglycerin or. Nitrobenzene production - Google Patents
Process for purifying nitric acid and for obtaining the same BEZW. of nitrobenzene from the waste acids of the nitroglycerin or. Nitrobenzene productionInfo
- Publication number
- DE46096C DE46096C DENDAT46096D DE46096DC DE46096C DE 46096 C DE46096 C DE 46096C DE NDAT46096 D DENDAT46096 D DE NDAT46096D DE 46096D C DE46096D C DE 46096DC DE 46096 C DE46096 C DE 46096C
- Authority
- DE
- Germany
- Prior art keywords
- nitrobenzene
- nitric acid
- nitroglycerin
- bezw
- production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims description 15
- LQNUZADURLCDLV-UHFFFAOYSA-N Nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 title claims description 10
- 239000002253 acid Substances 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000002699 waste material Substances 0.000 title claims description 4
- SNIOPGDIGTZGOP-UHFFFAOYSA-N 1,2,3-propanetrioltrinitrate Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 title claims description 3
- 229940014995 Nitroglycerin Drugs 0.000 title claims description 3
- 239000000006 Nitroglycerin Substances 0.000 title claims description 3
- 229960003711 glyceryl trinitrate Drugs 0.000 title claims description 3
- 150000007513 acids Chemical class 0.000 title claims 3
- 241000270295 Serpentes Species 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-N nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000266 injurious Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
PATENTAMT^PATENT OFFICE ^
Die technisch dargestellte Salpetersäure enthält regelmäfsig kleinere oder gröfsere Mengen (bis zu 2,5 pCt.) salpetriger Säure.The technically represented nitric acid regularly contains smaller or larger amounts (up to 2.5 pCt.) nitrous acid.
Für gewisse Zwecke, wie Nitrirungen, ist letztere Säure direct schädlich, in anderen Fällen ist sie lästig.For certain purposes, such as nitration, the latter acid is directly injurious, in others Cases it is a nuisance.
Es sind Versuche gemacht worden, technisch Salpetersäure darzustellen, ■ welche frei von salpetriger Säure ist, und zu diesem Zwecke siiid zwei Verfahren in Gebrauch. Nach dem ersten wird die Salpetersäure in grofsen Glasballons im Sandbade bis zur vollständigen Entfärbung erhitzt, was immerhin 20 bis 24 Stunden dauert und mit starken Verlusten an Salpetersäure, sowie nicht unbeträchtlichen Kosten für die Operation, Bruch des Glases u. s. w. verbunden ist. Nach dem zweiten Verfahren wird die Säure in Tho'ngefäfsen im Wasserbade erwärmt und gleichzeitig Luft durchgeblasen. Auch dieses Verfahren ist langwierig und die danach erhaltene Säure enthält meist noch V2 pCt. NO2H. Attempts have been made to technically produce nitric acid which is free from nitrous acid, and two methods are in use for this purpose. After the first, the nitric acid is heated in large glass balloons in a sand bath until it is completely discolored, which takes at least 20 to 24 hours and is associated with considerable losses of nitric acid, as well as not inconsiderable costs for the operation, breakage of the glass, etc. According to the second method, the acid is heated in a water bath in Tho'n jars and air is blown through at the same time. This process is also tedious and the acid obtained afterwards usually still contains V 2 pCt. NO 2 H.
Das folgende Verfahren gestattet, Salpetersäure continuirlich schnell und ohne Verluste von salpetriger Säure und Chlorverbindungen zu trennen. Eine Kühlschlange von Thon wird in heifsem Wasser von etwa 8o° erwärmt, und während von oben Salpetersäure einläuft, wird von unten Luft durchgeblasen. Die Schlange ist oben und unten mit hydraulischem Verschlufs, sowie mit Oeffnungen für Zu- und Ableitung der Luft versehen. Die Stärke des Zulaufes und des Luftstromes wird so regulirt, dafs die Salpetersäure unten mit der Temperatur 6o° und in der gewünschten Reinheit abläuft. Dieselbe passirt eine zweite, durch Wasser gekühlte Schlange und kann direct auf Flaschen gezogen werden. Die- austretende salpetrige Säure wird in bekannter Weise durch Schwefelsäure oder Kalkmilch absorbirt. Es ist zu bemerken, dafs das specifische Gewicht der erhaltenen Salpetersäure um etwa 0,005 geringer ist, als das der angewendeten, daher rührend, dafs salpetrige Säure das specifische Gewicht von Salpetersäure erhöht. Die erhaltene Säure ist bei genügender Länge der ersten Schlange, wenn beim Mischen keine hölzernen Rührer in Anwendung gekommen sind, absolut farblos. Eine Kühlschlange genügt für die Reinigung von mehreren Tausend Kilogramm Salpetersäure täglich.The following procedure allows nitric acid to be added rapidly and without loss separated from nitrous acid and chlorine compounds. A Thon cooling coil is heated in hot water of about 80 °, and while nitric acid flows in from above, air is blown through from below. The snake is up and down with hydraulic Closure, as well as with openings for access and Air discharge provided. The strength of the inlet and the air flow is regulated so that the nitric acid below has a temperature of 60 ° and the desired purity expires. It passes a second serpent, cooled by water, and can open directly Bottles are pulled. The emerging nitrous acid is carried out in a known manner Sulfuric acid or milk of lime absorbed. It should be noted that the specific gravity of the nitric acid obtained is about 0.005 lower than that of the applied, therefore touching, that nitrous acid increases the specific gravity of nitric acid. The received Acid is sufficient if the first line is long enough, if no wooden stirrers are used when mixing are absolutely colorless. One cooling coil is enough to clean several thousand Kilograms of nitric acid daily.
Dasselbe Verfahren und derselbe Apparat kann angewendet werden, um die Abfallsäure der Nitrobenzol- und Nitroglycerinfabrikation von Nitroverbindungen und Salpetersäure zu befreien. In diesem Falle wird auf 1500 erhitzte Luft oder Wasserdampf von unten durch die Schlange geblasen, während die Geschwindigkeit des Einlaufes der Säure so regulirt wird, dafs dieselbe unten mit einer Temperatur von ca. 1400 austritt, um direct in die zur Concentration bestimmten Gefäfse zu laufen.The same method and apparatus can be used to remove nitro compounds and nitric acid from the waste acid of nitrobenzene and nitroglycerin manufacture. In this case is blown at 150 0 heated air or steam from below through the coil, while the speed of the inlet of the acid is regulated so, that the same escape from the bottom at a temperature of about 140 0 to direct in the particular for concentration Gefäfse to run.
Claims (2)
Publications (1)
Publication Number | Publication Date |
---|---|
DE46096C true DE46096C (en) |
Family
ID=321227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT46096D Expired - Lifetime DE46096C (en) | Process for purifying nitric acid and for obtaining the same BEZW. of nitrobenzene from the waste acids of the nitroglycerin or. Nitrobenzene production |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE46096C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE943049C (en) * | 1952-11-22 | 1956-05-09 | Pintsch Bamag Ag | Process for processing the condensate that occurs in the condenser of nitric acid plants |
-
0
- DE DENDAT46096D patent/DE46096C/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE943049C (en) * | 1952-11-22 | 1956-05-09 | Pintsch Bamag Ag | Process for processing the condensate that occurs in the condenser of nitric acid plants |
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