DE1056392B - Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of beta rays - Google Patents
Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of beta raysInfo
- Publication number
- DE1056392B DE1056392B DEL26897A DEL0026897A DE1056392B DE 1056392 B DE1056392 B DE 1056392B DE L26897 A DEL26897 A DE L26897A DE L0026897 A DEL0026897 A DE L0026897A DE 1056392 B DE1056392 B DE 1056392B
- Authority
- DE
- Germany
- Prior art keywords
- ratio
- help
- aromatic hydrocarbons
- continuous measurement
- beta rays
- 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
Links
- 150000004945 aromatic hydrocarbons Chemical class 0.000 title description 4
- 238000005259 measurement Methods 0.000 title description 4
- 230000005855 radiation Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/12—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being a flowing fluid or a flowing granular solid
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
Einrichtung zur kontinuierlichen Messung des C/H -Verhältnisses in aromatischen Kohlenwasserstoffen mit Hilfe von Betastralilen Es ist bekannt, aus der Schwächung von Betastrahlen beim Durchgang durch flüssige, aromatische Kohlenwasserstoffe auf das Verhältnis der Kohlenstoffatome zu den Wasserstoffatomen zu schließen.Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of Betastralilen It is known from the attenuation of beta rays when they pass through liquid, aromatic hydrocarbons to infer the ratio of carbon atoms to hydrogen atoms.
Dies ist deshalb möglich, weil die Streuung an den Wasserstoffatomen etwa doppelt so groß ist wie an den Kohlenstoffatomen. Nun haben aber die aromatischen Kohlenwasserstoffe sehr verschiedene spezifische Gewichte, so, daß bei unveränderter Meßweglänge der Betastrahlen in der Flüssigkeit das unterschiedliche Flächengewicht nachträglich durch rechnerische Korrektur berücksichtigt werden muß. Zu diesem Zweck wird üblicherweise neben der Betastrahlenmessung mit Hilfe eines Aräometers jeweils das spezifische Gewicht der Flüssigkeit bestimmt und berücksichtigt.This is possible because of the scattering on the hydrogen atoms is about twice as large as on the carbon atoms. But now the aromatic ones have Hydrocarbons have very different specific weights, so that with unchanged The measuring path length of the beta rays in the liquid means the different weight per unit area must be taken into account subsequently by means of a computational correction. To this end is usually used in addition to the beta radiation measurement with the help of a hydrometer the specific weight of the liquid is determined and taken into account.
Diese nachträgliche Korrektur erübrigt sich, wenn sich die Meßweglänge automatisch mit dem spezifischen Gewicht ändert; erfindungsgemäß kann dies dadurch erreicht werden, daß man den Strahler fest an einem Schwimmer befestigt, dessen Eintauchtiefe vom spezifischen Gewicht abhängig ist, so daß die Meßweglänge zugleich mit der Änderung des speziñschen Gewichtes erfolgt. Eine genaue Proportionalität zwischen Weglänge und spezifischem Gewicht erreicht man, wenn man den Schwimmer als Hohlzylinder ausführt; in diesem Falle bleibt das zu durchstrahlende Flächengewicht konstant, weil die Änderung des spezifischen Gewichtes eine genau entsprechende Anderung der Eintauchtiefe zur Folge hat. Auf diese Weise kommt man zu einer korrekturfreien und damit kontinuierlichen Kontrollmöglichlceit des C : H-Verhältnisses. This subsequent correction is unnecessary if the measuring path length is different automatically changes with the specific weight; according to the invention this can thereby can be achieved that the radiator is firmly attached to a float, the Immersion depth is dependent on the specific weight, so that the length of the measuring path at the same time takes place with the change of the speciñschen weight. An exact proportionality between the length of the path and the specific gravity is reached by using the swimmer designed as a hollow cylinder; in this case the weight per unit area to be irradiated remains constant because the change in specific gravity is exactly the same Changes the immersion depth. In this way one arrives at a correction-free and thus continuous control of the C: H ratio.
Wenn die spezifischen Gewichte und damit die Eintauchtiefe stark variieren, so ändert sich zwangläufig auch der Abstand zwischen dem beweglichen Strahler und einem fest angeordneten Empfänger; dadurch können störende Intensitätsänderungen in Funktion des Abstandes auftreten. Dieser Einfluß kann in einfacher Weise dadurch beseitigt werden, daß eine Strahlenblende am Schwimmer und damit in festem Abstand zum Strahler befestigt wird und daß das Strahleneintrittsfenster am F.mpfänger auch bei niedrigster Schwimmerstellung größer ist als das auf den Empfänger fallende Strahlenbündel. If the specific weights and thus the immersion depth are strong vary, the distance between the moving ones inevitably also changes Emitter and a fixed receiver; this can cause disturbing changes in intensity occur as a function of the distance. This influence can be achieved in a simple manner be eliminated that a radiation shield on the float and thus at a fixed distance is attached to the radiator and that the radiation entrance window on the receiver also at the lowest float position is greater than that falling on the receiver Bundle of rays.
Fig. 1 zeigt schematisch eine Ausführungsform gemäß der Erfindung. Darin bedeutet 1 die Meßkammer mit Zu- und Ablauf, 2 den zylindrischen Ringschwimmer, 3 die Schwimmerführung, 4 den Betastrahler, 5 die Strahlenblende und 6 das Zählrohr. Fig. 1 shows schematically an embodiment according to the invention. 1 means the measuring chamber with inlet and outlet, 2 the cylindrical ring float, 3 the float guide, 4 the beta emitter, 5 the radiation diaphragm and 6 the counter tube.
PATENTANSPROCHE 1. Einrichtung zur kontinuierlichen Messung des C : H-Verhältnisses in aromatischen K;olhlenwasserstoffen mit Hilfe von Betastrahlen, dadurch gekennzeichnet, daß die Betastrahlenquelle mit einem Schwimmerkörper fest verbunden ist, derart, daß die durchstrahlte Flüssigkeitshöhe über dem Strahler vom spezifischen Gewicht der Flüssigkeit abhängt. PATENT CLAIM 1. Device for continuous measurement of the C : H-ratio in aromatic hydrocarbons with the help of beta rays, characterized in that the beta radiation source is fixed to a float body is connected in such a way that the irradiated liquid level is above the radiator depends on the specific weight of the liquid.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL26897A DE1056392B (en) | 1957-02-20 | 1957-02-20 | Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of beta rays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL26897A DE1056392B (en) | 1957-02-20 | 1957-02-20 | Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of beta rays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1056392B true DE1056392B (en) | 1959-04-30 |
Family
ID=7263978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL26897A Pending DE1056392B (en) | 1957-02-20 | 1957-02-20 | Device for continuous measurement of the C / H ratio in aromatic hydrocarbons with the help of beta rays |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1056392B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3254211A (en) * | 1961-12-11 | 1966-05-31 | Gen Motors Corp | Radioactive radiation transducer device for measuring variable conditions |
| US3419716A (en) * | 1963-09-14 | 1968-12-31 | Saunders Roe Dev Ltd | Device for measuring the concentration of substances in liquids |
-
1957
- 1957-02-20 DE DEL26897A patent/DE1056392B/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3254211A (en) * | 1961-12-11 | 1966-05-31 | Gen Motors Corp | Radioactive radiation transducer device for measuring variable conditions |
| US3419716A (en) * | 1963-09-14 | 1968-12-31 | Saunders Roe Dev Ltd | Device for measuring the concentration of substances in liquids |
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