DE971044C - Process for the continuous implementation of chemical reactions - Google Patents

Process for the continuous implementation of chemical reactions

Info

Publication number
DE971044C
DE971044C DEB20644A DEB0020644A DE971044C DE 971044 C DE971044 C DE 971044C DE B20644 A DEB20644 A DE B20644A DE B0020644 A DEB0020644 A DE B0020644A DE 971044 C DE971044 C DE 971044C
Authority
DE
Germany
Prior art keywords
corrosion
vessel wall
reaction
chemical reactions
corrosive
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
Application number
DEB20644A
Other languages
German (de)
Inventor
Dipl-Ing Ernst Plauth
Dr Walter Simon
Dr Hans Joachim Waldmann
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.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to DEB20644A priority Critical patent/DE971044C/en
Application granted granted Critical
Publication of DE971044C publication Critical patent/DE971044C/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F15/00Other methods of preventing corrosion or incrustation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

Verfahren zur kontinuierlichen Durchführung chemischer Reaktionen In der chemisgchen Industrie besteht vielfach die Notwendigkeit, Stoffe, von denen wenigstens einer korrodierende Eigenschaft hat, in Reaktionsgefäßen aus Metall umzusetzen. In manchen Fällen entstehen auch, wenn man von an sich nicht angreifinden Stoffen ausgeht, während der Umsetzung Zwischenprodukte, die korrodierend wirken. Um Schäden zu verhindern, hat man bisher die Reaktionsgefäße. entweder aus korrosionsfestem Werkstoff hergestellt oder sie damit ausgekleidet.Process for the continuous implementation of chemical reactions In In the chemical industry there is often a need for substances from which has at least one corrosive property to implement in metal reaction vessels. In some cases also arise when one of substances that are not attackable in themselves runs out, intermediate products that have a corrosive effect during the implementation. To damage to prevent, one has up to now the reaction vessels. either from corrosion-resistant Material made or lined with it.

Es wurde nun gefunden, daß man die Kosten, die durch die Verwendung von korrosionsfestem Werkstoff oder durch die Auskleidung der Reaktionsgefäße bisher entstanden, erheblich verringern kann, wenn man bei kontinuwerlich durchgeführten chendschien Reaktionen, bei denen ein oder mehrere Ausgangsstoffe oder während der Reaktion entstehende Produkte auf die Gefäßwand korrodierend wirken, die Endprodukte jedoch keine Korrosion mehr verursachen, ein Reaktionsgefäß verwendet, in dem ein kürzerer röhrenförmiger Einsatz aus korrosionsfestem Werkstoff mit Abstand von der Gefäßwand angeordnet ist, und in diesen die Rleaktionskomponenten derart, z. B. mit Hilfe eines Injektors, einbringt, daß die nicht mehr korrodierend wirkenden Stoffe über den Zwischenraum zwischen Einsatz und Gefäßwand zirkulieren. Dies kann z. B. bei Ausgangsstoffen, von denen einzelne korrodierend wirken, in der Weise geschehen, daß man in den ersten Teil des Reaktionsraulmes einen röhrenförmigen Einsatz aus korrosionsfestesin Werkstoff embringt, der von solcher Größe ist, daß in ihrn die Umsetzung so weit fortschreitet, daß bei dem Austritt aus dem Einsatz korrodierende Stoffe nicht mehr vorhanden sind. Es ist dabei nicht unbedingt erforderlich, daß der Einsatz aus korrosionsfestem Werkstoff bis an die Eintrittsstelle der umzusetzenden Stoffe heranreicht oder damit fest verbunden ist. Man kann vielmehr die Stoffe durch eine Leitung aus korrosionsfestem Material in den lose im Reaktionsgefäß befindlichen Einsatz einführen. Es ist besonders vorteilhaft, wenn die umzusetzenden Stoffe alle oder ein Teil davon mit Hilfe von Injektorwirkung eingebracht werden, weil in diesem FaU eine Zirkulation der nicht mehr korrodierend wirkenden Reaktionsprodukte möglich ist. Entstehen die korrodierend wirkenden Stoffe erst während der Umsetzung, so genügt es, wenn der Einsatz sich nur an der Stelle bsefindlet, an der die schädlichen Stoffe vorhanden sind. It has now been found that one can reduce the costs incurred by using from corrosion-resistant material or by lining the reaction vessels so far incurred, can be reduced considerably if one is carried out continuously chendschien reactions in which one or more starting materials or during the The products resulting from the reaction have a corrosive effect on the vessel wall, the end products however no longer cause corrosion, a reaction vessel is used in which a shorter tubular insert made of corrosion-resistant material at a distance from the Vessel wall is arranged, and in these the reaction components such. B. with the help of an injector, brings in that the no longer corrosive effect Substances across the space between inserts and circulate the vessel wall. This can e.g. B. for starting materials, some of which have a corrosive effect in the way that you get a tubular in the first part of the reaction line Insert made of corrosion-resistant material that is of such a size that in her the implementation progresses so far that upon leaving the mission corrosive substances are no longer present. It is not absolutely necessary to that the insert made of corrosion-resistant material up to the point of entry to be implemented Substances is close enough or is firmly connected to it. Rather, you can get through the fabrics a line made of corrosion-resistant material into the loosely located in the reaction vessel Introduce use. It is particularly advantageous if the substances to be converted are all or a part of it can be introduced with the help of injector effect, because in this A circulation of the reaction products, which no longer have a corrosive effect, is possible is. If the corrosive substances arise during the implementation, so it is sufficient if the use is only found at the point where the harmful Substances are present.

Der Einsatz hat zweckmäßig einen solchen Durchmesser, daß er leicht in das Reaktionsgefäß eingebracht und aus diesem entfernt werden kann. The insert expediently has a diameter such that it is easy can be introduced into and removed from the reaction vessel.

Dler Abstand des Einsatzes von der Gefäßwand kann dabei verhältnismäßig groß sein, z. B. 5 bis 35 Wo des Durchmessers des Reaktionsgefäßes betragen. Um eine gute Zirkulation der Reaktionsprodukte zu erzielen, sorgt man für einen entsprechenden Abstand zwischen Einsatz und innerer Gefäßwand. Der Einsatz kann dabei durch Verstrebungen im Reaktionsgefäß festgehalten werden.The distance between the insert and the vessel wall can be proportionate be large, e.g. B. 5 to 35 Wo of the diameter of the reaction vessel. Around To achieve a good circulation of the reaction products, an appropriate one ensures Distance between insert and inner vessel wall. The use can be made by struts be held in the reaction vessel.

Als Werkstoff für den Einsatz kommt z. B. As a material for use z. B.

Chrom-, Molybdän- und bzw. oder Vanadinstahl oder ein keramischer Werkstoff in Frage.Chrome, molybdenum and / or vanadium steel or a ceramic Material in question.

Die Arbeitsweise gemäß der Erfindung eignet sich für alle Reaktionen, bei denen von Anfang an oder während der Umsetzung korrodierend. wirkende Stoffe vorhanden sind, so z. B. für die Pyrro-Zdonsynthese, bei der vorübergehend als Zwischenprodukt Oxybuttersäureamid entsteht. Auch bei Verfahren, bei denen eine Neutralisation im Reaktionsgefäß durchgeführt wird, arbeitet man mit Vorteil gemäß der Erfindung. The procedure according to the invention is suitable for all reactions, where corrosive from the start or during implementation. active substances are present, so z. B. for the Pyrro-Zdonsynthese, in which temporarily as an intermediate Oxybutyric acid amide is formed. Even with processes in which neutralization in the Reaction vessel is carried out, one works with advantage according to the invention.

Claims (3)

PATENTANSPRUCH: Verfahren zur kontinuierlichen Durchführung chemischer Reaktionen, bei denen ein oder mehrere Ausgangsstoffe oder während der Reaktion entstehen,dSe Produkte auf die Gefäßwand korrodierend wirken, die Endprodukte jedoch keine Korrosion mehr verursachen, dadurch gekennzeichnet, daß ein nicht korrosionsbeständi ges Reaktionsgefäß verwendet wird, in dem ein kürzerer röhrenförmigerEinsatzauskorrosionsfestem Werkstoff mit Abstand von der Gefäßwand angeordnet ist und in diesen die Reaktionskomponenten derart, z. B. mit Hilfe eines Inj ektors, eingebracht werden, daß die nicht mehr korrodierend wirkenden Stoffe über den Zwischenraum zwischen Einsatz und Gefäßwand zirkulieren. PATENT CLAIM: Process for the continuous implementation of chemical Reactions in which one or more starting materials or during the reaction arise, the products have a corrosive effect on the vessel wall, but the end products no longer cause corrosion, characterized in that a non-corrosion resistant Total reaction vessel is used, in which a shorter tubular insert made of corrosion-resistant Material is arranged at a distance from the vessel wall and in these the reaction components the doctor. B. with the help of an Inj ector introduced that no longer corrosive substances through the space between the insert and the vessel wall circulate. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 357 593, 453 943, 595 306, 639 225, 699 770; Blücher-Winkelmann: »Auskunftsbuch für die chemische Industrie«, I948, S. go, Abs. 3; Ullmann.: Enzyklopädie der techn. Chemie, Publications considered: German Patent Specifications No. 357 593, 453 943, 595 306, 639 225, 699 770; Blücher-Winkelmann: »Directory of information for the chemical industry ”, 1948, p. go, para. 3; Ullmann .: Encyclopedia of the techn. Chemistry, 3. Auflage, Bd. I, S. 99I, 993; B jos: Final Report I662, Item Nr. 22; Bios: Final Report 85 r, Item Nr. 22.3rd Edition, Vol. I, pp. 99I, 993; B jos: Final Report I662, Item No. 22; Bios: Final Report 85 r, Item No. 22.
DEB20644A 1952-06-01 1952-06-01 Process for the continuous implementation of chemical reactions Expired DE971044C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB20644A DE971044C (en) 1952-06-01 1952-06-01 Process for the continuous implementation of chemical reactions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB20644A DE971044C (en) 1952-06-01 1952-06-01 Process for the continuous implementation of chemical reactions

Publications (1)

Publication Number Publication Date
DE971044C true DE971044C (en) 1958-12-04

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DEB20644A Expired DE971044C (en) 1952-06-01 1952-06-01 Process for the continuous implementation of chemical reactions

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE357593C (en) * 1922-10-27 Harry Pauling Dipl Ing Device for concentrating sulfuric acid
DE453943C (en) * 1925-12-01 1927-12-22 Wilhelm Schwarzenauer Procedure for operating submersible flames
DE595306C (en) * 1932-02-03 1934-04-10 Aristid V Grosse Dr Ing Device for carrying out reactions at elevated pressures
DE639225C (en) * 1927-06-18 1936-12-01 Willi Buesching Process for the high concentration of unpurified sulfuric acid after pretreatment in dephlegmators
DE699770C (en) * 1934-06-03 1940-12-05 Willi Buesching Process for the high concentration of sulfuric acid and similar corrosive liquids

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE357593C (en) * 1922-10-27 Harry Pauling Dipl Ing Device for concentrating sulfuric acid
DE453943C (en) * 1925-12-01 1927-12-22 Wilhelm Schwarzenauer Procedure for operating submersible flames
DE639225C (en) * 1927-06-18 1936-12-01 Willi Buesching Process for the high concentration of unpurified sulfuric acid after pretreatment in dephlegmators
DE595306C (en) * 1932-02-03 1934-04-10 Aristid V Grosse Dr Ing Device for carrying out reactions at elevated pressures
DE699770C (en) * 1934-06-03 1940-12-05 Willi Buesching Process for the high concentration of sulfuric acid and similar corrosive liquids

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