DE1215297B - Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories - Google Patents

Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories

Info

Publication number
DE1215297B
DE1215297B DES73854A DES0073854A DE1215297B DE 1215297 B DE1215297 B DE 1215297B DE S73854 A DES73854 A DE S73854A DE S0073854 A DES0073854 A DE S0073854A DE 1215297 B DE1215297 B DE 1215297B
Authority
DE
Germany
Prior art keywords
exhaust air
sulfur
carbon disulfide
recovery
containing exhaust
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.)
Pending
Application number
DES73854A
Other languages
German (de)
Inventor
Dipl-Ing Albert Nonnenmacher
Dr Hans-Georg Wendlandt
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.)
Spinnfaser AG
Original Assignee
Spinnfaser AG
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
Priority claimed from DES43175A external-priority patent/DE1052055B/en
Application filed by Spinnfaser AG filed Critical Spinnfaser AG
Priority to DES73854A priority Critical patent/DE1215297B/en
Priority to BE615556A priority patent/BE615556R/en
Priority to CH401762A priority patent/CH397605A/en
Publication of DE1215297B publication Critical patent/DE1215297B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide
    • B01D53/523—Mixtures of hydrogen sulfide and sulfur oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/027—Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses or sulfur containing ores; Purification of the recovered sulfur
    • C01B17/033—Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses or sulfur containing ores; Purification of the recovered sulfur using a liquid extractant
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/70—Compounds containing carbon and sulfur, e.g. thiophosgene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Treating Waste Gases (AREA)

Description

BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

AUSLEGESCHRIFTEDITORIAL

Int. CL: Int. CL:

DOIfDOIf

Deutsche KL: 29 b-3/28 German KL: 29 b -3/28

Nummer: 1215 297Number: 1215 297

Aktenzeichen: S 73854 TV c/29 bFile number: S 73854 TV c / 29 b

Anmeldetag: 5. Mai 1961Filing date: May 5, 1961

Auslegetag: 28. April 1966Opening day: April 28, 1966

Gegenstand des Hauptpatents ist ein Verfahren zur Rückgewinnung von Schwefel und Schwefelkohlenstoff aus der H2S- und CS2-haltigen Abluft von Viskose verarbeitenden Fabriken mittels alkalischer Eisenhydroxydsuspension und anschließender Entfernung des abgeschiedenen Schwefels durch Flotation. Dieses Verfahren ist dadurch gekennzeichnet, daß pro Mol H2S wenigstens 7,5 Mol Fe(OH)3 eingesetzt werden und die Abluft mit einer Geschwindigkeit von wenigstens 30 cm/Sek. durch die Eisenhydroxydsuspension hindurchgeleitet wird, wonach in bekannter Weise der CS2 zurückgewonnen wirdThe main patent relates to a process for the recovery of sulfur and carbon disulfide from the H 2 S and CS 2 -containing exhaust air from viscose processing plants by means of an alkaline iron hydroxide suspension and subsequent removal of the separated sulfur by flotation. This process is characterized in that at least 7.5 moles of Fe (OH) 3 are used per mole of H 2 S and the exhaust air is discharged at a speed of at least 30 cm / sec. is passed through the iron hydroxide suspension, after which the CS 2 is recovered in a known manner

Es wurde gefunden, daß man eine Verbesserung des Verfahrens erreichen kann, wenn man die zur Entfernung des H2S benutzte Eisenhydroxydsuspension laufend auf 20 bis 30° C kühlt.It has been found that the process can be improved if the iron hydroxide suspension used to remove the H 2 S is continuously cooled to 20.degree. To 30.degree.

Im. Hauptpatent wurde angegeben, daß die Temperatur der Eisenhydroxydsuspension zweckmäßig bei 30 bis 40° C liegen soll. Es stellte sich jedoch heraus, daß bei später benutzten höheren Spinntemperaturen in der Spinnerei und auch wegen der heißen Wasserdämpfe, die bei der Absaugung des CS2 aus der Heißwasserverstreckungszone der Spinnmaschinen mitgeführt werden, diese Temperaturgrenze schwer einzuhalten ist. Sie wurde oft überschritten. In diesen Fällen trat die vom H2S befreite Abluft mit Temperaturen von über 50° C in die Aktivkohleabsorber ein, da sie sich bei der Kompression vor dem Eintritt in den Absorber weiter erhitzt. Dabei wurde festgestellt, daß bei hohen Temperaturen die CS2-Ausbeuten durch hohe CS2-Verluste kleiner wurden.In the main patent it was stated that the temperature of the iron hydroxide suspension should expediently be 30 to 40.degree. However, it turned out that at higher spinning temperatures used later in the spinning mill and also because of the hot water vapors that are entrained when the CS 2 is sucked out of the hot water drawing zone of the spinning machines, this temperature limit is difficult to maintain. It was often exceeded. In these cases, the exhaust air freed from H 2 S entered the activated carbon absorber at temperatures of over 50 ° C, as it heats up further during compression before entering the absorber. It was found that at high temperatures the CS 2 yields were lower due to high CS 2 losses.

Es wurde zunächst versucht, die Abluft vor dem Eintritt in den Absorber durch Gegenstromwärmeaustauscher zu kühlen, doch waren hierzu wegen der sehr großen Abluftmengen und wegen des geringen Temperaturgefälles außerordentlich große Flächen erforderlich.An attempt was first made to pass the exhaust air through a countercurrent heat exchanger before it entered the absorber to cool, but were here because of the very large amounts of exhaust air and because of the small Temperature gradient, extraordinarily large areas are required.

Das erfindungsgemäße Verfahren ermöglicht in einfacher Weise eine Senkung der Ablufttemperatur und damit eine wesentliche Erhöhung der Schwefelkohlenstoffausbeute. The method according to the invention enables the exhaust air temperature to be reduced in a simple manner and thus a substantial increase in the carbon disulfide yield.

Zur Ausführung des Verfahrens läßt man zweckmäßig einen Teil des Wassers der Eisenhydroxydsuspension in bekannter Weise in einem Kühlturm verdunsten, und zwar so, daß die Suspension eine Temperatur von 20 bis 30° C erhält. Die vom H2S befreite Abluft geht dann mit 33 bis 40° C in den Absorber, da durch die Kompression die Temperatur wieder erhöht wird. Ohne Kühlung der Eisenhydroxydsuspension trat die Abluft in den CS2-Absorber mit 50° C ein, und die Ausbeute an CS2 beRückgewinnung von Schwefel und
Schwefelkohlenstoff aus der H2S- und CS2-haltigen Abluft von Viskose verarbeitenden
FabrikenTo carry out the process, it is expedient to allow part of the water in the iron hydroxide suspension to evaporate in a known manner in a cooling tower in such a way that the suspension has a temperature of 20 to 30.degree. The exhaust air freed from H 2 S then goes into the absorber at 33 to 40 ° C, as the compression increases the temperature again. Without cooling the iron hydroxide suspension, the exhaust air entered the CS 2 absorber at 50 ° C, and the CS 2 yield was recovered from sulfur and
Carbon disulfide from the H 2 S and CS 2 -containing exhaust air from viscose processing
Factories

Zusatz zum Patent: 1052 055Addendum to the patent: 1052 055

Anmelder:Applicant:

Spinnfaser Aktiengesellschaft,Staple fiber stock corporation,

Kassel-BettenhausenKassel-Bettenhausen

Als Erfinder benannt:Named as inventor:

Dipl.-Ing. Albert Nonnenmacher,Dipl.-Ing. Albert Nonnenmacher,

Kassel- Wilhelmshöhe;Kassel Wilhelmshöhe;

Dr. Hans-Georg Wendlandt,Dr. Hans-Georg Wendlandt,

Oberbruck-GrebbenOberbruck-Grebben

trug 45 %. Nach Kühlung der Suspension derart, daß die Eintrittstemperatur 40° C war, stieg die Ausbeute auf 56%. Eine weitere Senkung der Eintrittstemperatur auf 33° C durch eine stärkere Kühlung der Suspension verbesserte die Ausbeute auf 61%. Diese Ausbeutezahlen beziehen sich auf die eingesetzte Schwefelkohlenstoffmenge, von der in den Versuchen aus verschiedenen Gründen, die nicht mit dem erfindungsgemäßen Verfahren zu tun haben, nur 65 % der Rückgewinnungsanlage zugeführt werden konnte. Auf diese Menge bezogen betragen die obengenannten Ausbeutezahlen 69% ohne Kühlung und 86% bei einer Absorbereintrittstemperatur von 40° C bzw. 94% bei 33° C.carried 45%. After cooling the suspension in such a way that the inlet temperature was 40 ° C., the yield increased to 56%. A further lowering of the inlet temperature to 33 ° C through stronger cooling the suspension improved the yield to 61%. These yield figures relate to the one used Amount of carbon disulfide, different from that used in the experiments for various reasons not related to have to do with the process according to the invention, only 65% are fed to the recovery plant could. Based on this amount, the above yield figures are 69% without cooling and 86% at an absorber inlet temperature of 40 ° C or 94% at 33 ° C.

In einer großen Fabrik werden also durch das neue Verfahren erheblich größere Mengen an Schwefelkohlenstoff zurückgewonnen. Außerdem wird die Luft weniger verunreinigt.In a large factory, the new process means that considerably larger quantities of Carbon disulfide recovered. In addition, the air is less polluted.

Claims (1)

Patentanspruch:Claim: Verfahren zur Rückgewinnung von Schwefel und Schwefelkohlenstoff aus der H2S- und CS2-haltigen Abluft von Viskose verarbeitenden Fabriken mittels alkalischer Eisenhydroxydsuspen-Process for the recovery of sulfur and carbon disulfide from the H 2 S and CS 2 -containing exhaust air from viscose processing plants by means of alkaline iron hydroxide sionen und anschließender Entfernung des Schwefels durch Flotation, wobei pro Mol H2S wenigstens 7,5MoI Fe(OH)3 eingesetzt werden und die Abluft mit einer Geschwindigkeit von wenigstens 30 cm/Sek. durch die Eisenhydroxydsuspension hindurchgeleitet wird, wonach der CS2 in bekannter Weise zurückgewonnen wird nach Patent 1052055, dadurch gekennzeichnet, daß man die zur Entfernung des H2S benutzte Eisenhydroxydsuspension laufend auf 20 bis 30° C kühlt.ions and subsequent removal of the sulfur by flotation, at least 7.5MoI Fe (OH) 3 being used per mole of H 2 S and the exhaust air at a speed of at least 30 cm / sec. is passed through the iron hydroxide suspension, after which the CS 2 is recovered in a known manner according to patent 1052055, characterized in that the iron hydroxide suspension used to remove the H 2 S is continuously cooled to 20 to 30 ° C. In Betracht gezogene Druckschriften:
Österreichische Patentschrift Nr. 195 902.Considered publications:
Austrian patent specification No. 195 902. 609 560/455 4.66 © Bundesdruckerei Berlin609 560/455 4.66 © Bundesdruckerei Berlin
DES73854A 1955-03-24 1961-05-05 Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories Pending DE1215297B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DES73854A DE1215297B (en) 1955-03-24 1961-05-05 Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories
BE615556A BE615556R (en) 1961-05-05 1962-03-26 Process for cleaning the exhaust air of viscose factories
CH401762A CH397605A (en) 1955-03-24 1962-04-03 Process for cleaning exhaust air from viscose factories

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES43175A DE1052055B (en) 1955-03-24 1955-03-24 Process for the recovery of sulfur and carbon disulfide from the H2S- and CS2-containing exhaust air from viscose processing plants
DES73854A DE1215297B (en) 1955-03-24 1961-05-05 Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories
DES89460A DE1233978B (en) 1955-03-24 1964-02-11 Process for the recovery of sulfur and carbon disulfide from the exhaust air containing H S and CS from viscose processing plants

Publications (1)

Publication Number Publication Date
DE1215297B true DE1215297B (en) 1966-04-28

Family

ID=27212575

Family Applications (1)

Application Number Title Priority Date Filing Date
DES73854A Pending DE1215297B (en) 1955-03-24 1961-05-05 Recovery of sulfur and carbon disulfide from the HS- and CS-containing exhaust air from viscose processing factories

Country Status (2)

Country Link
CH (1) CH397605A (en)
DE (1) DE1215297B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT195902B (en) * 1961-05-05 1958-02-25 Spinnfaser Ag Process for cleaning exhaust air from viscose factories

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT195902B (en) * 1961-05-05 1958-02-25 Spinnfaser Ag Process for cleaning exhaust air from viscose factories

Also Published As

Publication number Publication date
CH397605A (en) 1965-08-31

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