DE146716C - - Google Patents
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- Publication number
- DE146716C DE146716C DENDAT146716D DE146716DA DE146716C DE 146716 C DE146716 C DE 146716C DE NDAT146716 D DENDAT146716 D DE NDAT146716D DE 146716D A DE146716D A DE 146716DA DE 146716 C DE146716 C DE 146716C
- Authority
- DE
- Germany
- Prior art keywords
- acid
- weakly acidic
- sulfo group
- sulfoanthranilic
- anthranilic acid
- 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.)
- Active
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- RWZYAGGXGHYGMB-UHFFFAOYSA-N Anthranilic acid Chemical compound NC1=CC=CC=C1C(O)=O RWZYAGGXGHYGMB-UHFFFAOYSA-N 0.000 claims description 4
- OLBAMNTVQSDZQI-UHFFFAOYSA-N 2-(sulfoamino)benzoic acid Chemical compound OC(=O)C1=CC=CC=C1NS(O)(=O)=O OLBAMNTVQSDZQI-UHFFFAOYSA-N 0.000 claims description 3
- 239000003929 acidic solution Substances 0.000 claims description 2
- 230000001264 neutralization Effects 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 3
- 230000002378 acidificating Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 229910001023 sodium amalgam Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
In der Patentschrift 129165 ist die Überführung der SulfoanthranilsäureIn patent specification 129165 the transfer is of sulfoanthranilic acid
NH2: COOH: SO3H= 1:2:5 NH 2 : COOH: SO 3 H = 1: 2: 5
in die Anthranilsäure durch Abspaltung der Sulfogruppe vermittels Natriumamalgam beschrieben. Es wurde nun gefunden, daß diese Abspaltung der Sulfogruppe auch durch den elektrischen Strom bewerkstelligt \verden kann. 10described in the anthranilic acid by splitting off the sulfo group by means of sodium amalgam. It has now been found that this splitting off of the sulfo group can also be brought about by the electric current. 10
Eine neutrale oder schwach saure Lösung von Sulfoanthranilsäure wird — im Kathodenraum — mit einer Stromdichte von 100 bis 1000 Ampere oder darüber für das Quadratmeter Kathodenfläche so lange elektrolysiert, bis die Lösung hell und fast farblos geworden ist. Man verwendet vorteilhaft als Kathode Quecksilber oder amalgamierte Kathoden; mit wachsender Stromdichte geht die Abspaltung der Sulfogruppe rascher vor sich. Nach Beendigung der Reaktion wird die Lösung mit, Essigsäure schwach angesäuert, worauf dann die Anthranilsäure auskristallisiert. Für die weitere Verarbeitung ist aber naturgemäß eine Isolierung der Anthranilsäure nicht immer erforderlich.A neutral or weakly acidic solution of sulfoanthranilic acid is - in the cathode compartment - with a current density of 100 to 1000 amperes or more for the square meter Electrolyzed cathode surface until the solution has become light and almost colorless is. It is advantageous to use mercury or amalgamated cathodes as the cathode; with As the current density increases, the sulfo group is split off more rapidly. After completion The reaction is made weakly acidic with acetic acid, whereupon the anthranilic acid crystallized out. For further processing, however, there is naturally one Isolation of the anthranilic acid is not always necessary.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE146716C true DE146716C (en) |
Family
ID=413961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT146716D Active DE146716C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE146716C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6770378B1 (en) | 1998-05-27 | 2004-08-03 | Institut Fur Polymerforschung E.V. Dresden | Compounds made of polyamide substance(s) and perfluoroalkyl substance(s) and mixtures of these compounds with additional polymer substance(s), methods for their production and use |
| US7759441B2 (en) | 2003-10-30 | 2010-07-20 | Leibniz-Institut Fuer Polymerforschung Dresden E.V. | Radically coupled PTFE polymer compounds and method for the production thereof |
| US7790780B2 (en) | 2003-10-30 | 2010-09-07 | Leibniz-Institut Fuer Polymerforschung Dresden E.V. | Radically coupled PTFE polymer powders, and method for the production thereof |
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0
- DE DENDAT146716D patent/DE146716C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6770378B1 (en) | 1998-05-27 | 2004-08-03 | Institut Fur Polymerforschung E.V. Dresden | Compounds made of polyamide substance(s) and perfluoroalkyl substance(s) and mixtures of these compounds with additional polymer substance(s), methods for their production and use |
| US7759441B2 (en) | 2003-10-30 | 2010-07-20 | Leibniz-Institut Fuer Polymerforschung Dresden E.V. | Radically coupled PTFE polymer compounds and method for the production thereof |
| US7790780B2 (en) | 2003-10-30 | 2010-09-07 | Leibniz-Institut Fuer Polymerforschung Dresden E.V. | Radically coupled PTFE polymer powders, and method for the production thereof |
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