DE727834C - Process to prevent corrosion in the drying column switched on in Edeleanu plants - Google Patents
Process to prevent corrosion in the drying column switched on in Edeleanu plantsInfo
- Publication number
- DE727834C DE727834C DEE54478D DEE0054478D DE727834C DE 727834 C DE727834 C DE 727834C DE E54478 D DEE54478 D DE E54478D DE E0054478 D DEE0054478 D DE E0054478D DE 727834 C DE727834 C DE 727834C
- Authority
- DE
- Germany
- Prior art keywords
- edeleanu
- plants
- switched
- prevent corrosion
- column
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
- C10G21/08—Inorganic compounds only
- C10G21/10—Sulfur dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
Verfahren zur Verhinderung von Korrosionen in der in Edeleanu-Anlagen eingeschalteten Trockenkolonne Es ist bekannt, daß die Rückgewinnung des Lösungsmittels oder Lösungsmittelgemisches aus Lösungen, die bei der Behandlung von Kohlenwasserstoffgemischen oder Gemischen von Kohlenwasserstoffen'und Kohlenwasserstoffderivaten mit flüssigem Schwefeldioxyd oder mit Schwefeldioxyd enthaltenden Lösungsmittelgemischen anfallen, derart erfolgt"daß die Lösungen unter fallendem Druck aus.gedämpft und die Lösungsmitteldämpfe ganz oder zum Teil durch Rektifikation in einer Kolonne unter Kondensatordruck oder etwas höherem Druck getrocknet werden.Process to prevent corrosion in the in Edeleanu plants switched on drying column It is known that the recovery of the solvent or mixed solvent from solutions used in the treatment of hydrocarbon mixtures or mixtures of hydrocarbons and hydrocarbon derivatives with liquid Sulfur dioxide or solvent mixtures containing sulfur dioxide are produced, in such a way that the solutions and the solvent vapors are aus.dampf under falling pressure wholly or partly by rectification in a column under condenser pressure or slightly higher pressure.
Diese Trockenkolonne muß in ihrem unteren Teil, in ,dem das wäßrige Kondensat anfällt, durch Verwendung besonderer Metalle oder Metallbelege, wie rostfreien Stahls öder Bleis, gegen Korrosion geschützt werden, da in dem Wasser in geringer Menge auch Schwefeldioxyd enthalten ist. Wir haben nun gefunden, .daß neben anderen schon bekannten Maßnahmen eine weitere Verringerung der Korrosionsmöglichkeit dadurch bewirkt wird, daß man für einen ,gewissen Gehalt des im unteren Kolonnenende sich sammelnden Wassers an Alkali- oder Erdalkalibisulfit sorgt. Das kann entweder dadurch geschehen, daß man, geringe Mengen Sulfite bzw. Bisulfite oder auch Alkalien, Erdalkalien oder lösliche Salze schwacher Säuren, :die durch die schweflige Säure in Sulfite umgesetzt werde:, fest oder gelöst in Wasser, in den unteren Teil der Kolonne einführt, oder dadurch, daß man die betreffenden Lösungen zusammen mit den zu trocknenden Dämpfen oder auch an einer tieferen Stelle der Kolonne in diese einspritzt.This dry column must be in its lower part, in which the aqueous Condensate accumulates due to the use of special metals or metal covers such as rustproof Steel or lead, be protected against corrosion, since in the water in less Amount also contains sulfur dioxide. We have now found .that alongside others already known measures result in a further reduction in the possibility of corrosion the effect is that for a certain amount of the in the lower end of the column collecting water of alkali or alkaline earth disulphite. That can be done either by happen that you, small amounts of sulfites or bisulfites or alkalis, alkaline earths or soluble salts of weak acids,: those made by the sulphurous acid in sulphites is implemented:, solid or dissolved in water, introduced into the lower part of the column, or by having the solutions in question together with those to be dried Steaming or injecting into the column at a lower point.
Für den angegebenen Zweck ist es erforderlich, durch Nachschub von Chemikalien in dem Kolonnenwasser, von dem ein. Teil ständig oder periodisch abgezogen wird, stets eine gewisse Sulfit-bzw. Bisulfitkonzen.tration aufrechtzuerhalten. Im allgemeinen reicht eine Konzentration von z °% aus, es kommen aber auch höhere Konzentrationen in Frage.For the stated purpose it is necessary by replenishment of Chemicals in the column water from which one. Part continuously or periodically deducted is, always a certain sulfite or. Maintain bisulfite concentration. In general, a concentration of z °% is sufficient, but higher levels can also be used Concentrations in question.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE54478D DE727834C (en) | 1941-02-02 | 1941-02-02 | Process to prevent corrosion in the drying column switched on in Edeleanu plants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE54478D DE727834C (en) | 1941-02-02 | 1941-02-02 | Process to prevent corrosion in the drying column switched on in Edeleanu plants |
Publications (1)
Publication Number | Publication Date |
---|---|
DE727834C true DE727834C (en) | 1942-11-13 |
Family
ID=7081950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE54478D Expired DE727834C (en) | 1941-02-02 | 1941-02-02 | Process to prevent corrosion in the drying column switched on in Edeleanu plants |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE727834C (en) |
-
1941
- 1941-02-02 DE DEE54478D patent/DE727834C/en not_active Expired
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