US898390A - Process of concentrating nitrosulfuric waste acid. - Google Patents

Process of concentrating nitrosulfuric waste acid. Download PDF

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Publication number
US898390A
US898390A US386072A US1907386072A US898390A US 898390 A US898390 A US 898390A US 386072 A US386072 A US 386072A US 1907386072 A US1907386072 A US 1907386072A US 898390 A US898390 A US 898390A
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United States
Prior art keywords
waste acid
nitrosulfuric
concentrating
acid
waste
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Expired - Lifetime
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US386072A
Inventor
Harry Pauling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Firm Of Salpeter-Saeure Industrie-Gesellschaft G M B H
FIRM OF SALPETER SAEURE IND GES GmbH
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FIRM OF SALPETER SAEURE IND GES GmbH
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Priority claimed from US33038706A external-priority patent/US887266A/en
Application filed by FIRM OF SALPETER SAEURE IND GES GmbH filed Critical FIRM OF SALPETER SAEURE IND GES GmbH
Priority to US386072A priority Critical patent/US898390A/en
Application granted granted Critical
Publication of US898390A publication Critical patent/US898390A/en
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/24—Nitric oxide (NO)
    • C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia

Definitions

  • waste acid resulting in the manufacture of explosive substances and like processes connected. with nitritications, such waste acid consisting of a mixture of diluted sulfuric acid with diluted nitric acid.
  • This waste acid is the remainder of the socalled nitrosulfuric acid used in leiiecting the said nitrit'ying processes, the acid being at the beginning of such operations concentrated, but suffering a loss in nitric acid while at the, same time it receives an addition of water.
  • the present invention consists in a process that shall enable a ready concentration or regeneration of the diluted nitric acid contained in such waste acid, so as to render it reusable for nitrifications or the like.
  • the apparatus represented consists, in substance, of a U-tube a, b, a cross tube e establishing communication between the two legs thereof, and in such a manner that one end of this tube extends into the interior of the leg (1', as shown; a feed tube f, and drain cocks g and c is the anode and d the cathode.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Description

No- 898,390. PATENTBD SEPT. 8, 1903 v H; PAULING.
moonss or GONGENTRATING mmos'nmmmc WASTE A0111,
APPLICATION FILED JULY 29,1907.
e722 van for.
UNITED STATES PATENT OFFICE,
HARRY PAULING, OF GELSENKIRCHEN, GERMANY, ASSIGNOR TO THE FIRM OF SALPFTEPu SAURE INDUSTRIE-GESELLSGHAFT, G. M. B. H., OF GELSENKIRCHEN, GERMANY.
PROCESS OF CONCENTRATING NITROSULFURIC WASTE ACID.
Specification of Letters Patent.
Patented Sept. 8, 1908.
ori inal application filed August 1a, 1908, Serial No. 830,387. Divided and this application filed July 29, 1907.
, Serial m. 386,072.
To all whom it may concern:
Be it known that I, HARRY PAULING, a subject of the German Emperor, and resident of 84 Wilhelmstrasse, in Gelsenkirchen IV, in the Province of Westphalia, Kingdom of Prussia, Germany, have invented certain new and useful Improvements in Processes of Concentrating Nltrosuliuric Waste Acid,
of which the following is a specification.
There is a sort of waste acid resulting in the manufacture of explosive substances and like processes connected. with nitritications, such waste acid consisting of a mixture of diluted sulfuric acid with diluted nitric acid. This waste acid is the remainder of the socalled nitrosulfuric acid used in leiiecting the said nitrit'ying processes, the acid being at the beginning of such operations concentrated, but suffering a loss in nitric acid while at the, same time it receives an addition of water. i
The present invention consists in a process that shall enable a ready concentration or regeneration of the diluted nitric acid contained in such waste acid, so as to render it reusable for nitrifications or the like.
To such end the waste acid is electrolyzed in company with diluted nitric acid, in a pcculiar manner, as will be understood from the following description and be particularly pointed out in the appended claim, refcrence being had to the accompanying drawing which is a diagrammatical view of an apparatus'adapted for eil'ecting my process.
The apparatus represented consists, in substance, of a U-tube a, b, a cross tube e establishing communication between the two legs thereof, and in such a manner that one end of this tube extends into the interior of the leg (1', as shown; a feed tube f, and drain cocks g and c is the anode and d the cathode.
The operation of this device is as follows: The waste acid is filled into the leg a so as to surround the anode, while the leg b is sup-- plied with diluted nitric acid, which will thus be in contact with the cathode. Hereu on an electric current is passed through the iquid, with the result that at the anode c oxygen is formed, while at the cathode d nitric oxids are generated. The latter pass through the tube e into the leg 0, where they dissolve in the diluted nitric acid surrounding the anode, so as to be converted into nitric acid by the action of the oxygen set free at the anode. After a suitable or desired degree of concentration has been obtained in the lega the diluted nitric acid contained in the le 11 is dischar ed through a cock 7c. This 8.01(l,,
trolyzing such liquid, and conducting'the nitrogen oxids liberated at the cathode into the anode chamber.
In witness whereof I have hereunto signed my name this 22 day of June 1907, in the presence of two subscribing Witnesses.
' HARRY PAULING.
Witnesses CARL HEINRICH,' RICHARD STERKEL.
US386072A 1906-08-13 1907-07-29 Process of concentrating nitrosulfuric waste acid. Expired - Lifetime US898390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US386072A US898390A (en) 1906-08-13 1907-07-29 Process of concentrating nitrosulfuric waste acid.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33038706A US887266A (en) 1906-08-13 1906-08-13 Process for concentrating nitric acid.
US386072A US898390A (en) 1906-08-13 1907-07-29 Process of concentrating nitrosulfuric waste acid.

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US898390A true US898390A (en) 1908-09-08

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US386072A Expired - Lifetime US898390A (en) 1906-08-13 1907-07-29 Process of concentrating nitrosulfuric waste acid.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832734A (en) * 1952-02-14 1958-04-29 Leeds & Northrup Co Coulometric systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832734A (en) * 1952-02-14 1958-04-29 Leeds & Northrup Co Coulometric systems

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