GB923330A - Process for producing phosphorus pentasulphide having a controlled reactivity - Google Patents
Process for producing phosphorus pentasulphide having a controlled reactivityInfo
- Publication number
- GB923330A GB923330A GB1738161A GB1738161A GB923330A GB 923330 A GB923330 A GB 923330A GB 1738161 A GB1738161 A GB 1738161A GB 1738161 A GB1738161 A GB 1738161A GB 923330 A GB923330 A GB 923330A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphide
- reactivity
- temperature
- time
- heating
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
<PICT:0923330/III/1> The reactivity of phosphorus pentasulphide, as measured by the time required for a given temperature rise in the reaction with 2-ethyl hexanol, is reduced from an initially high value by heating the sulphide at a temperature below its m.pt, e.g. up to 90 DEG C. below, for a selected time and then cooling. The reduction in reactivity achieved depends on both the temperature and the length of time of such heating. As shown in Fig. 1 the initial high reactivity sulphide is formed in generator 11 as a vapour and passed to condenser 14 from where it condenses and collects as a liquid in container 16. Here the flaker drum 18 cooled to approx. 200 DEG C. delivers the solid sulphide via pipe 19 to a jacketed screw conveyor 20. This can be controlled to give the desired temperature and, by varying the speed of the helix 22 by means of variable speed reducer 25, a desired residence time can be achieved before delivering via pipe 29 to a final cooling to ambient temperature and storage. A sample of sulphide of lowreactivity may have its reactivity raised a controlled amount by first melting the sulphide, quenching it and then submitting it to the process of the invention.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3939160A | 1960-06-28 | 1960-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB923330A true GB923330A (en) | 1963-04-10 |
Family
ID=21905195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1738161A Expired GB923330A (en) | 1960-06-28 | 1961-05-12 | Process for producing phosphorus pentasulphide having a controlled reactivity |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB923330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248602A (en) * | 1978-08-21 | 1981-02-03 | Hoechst Aktiengesellschaft | Production of phosphorus pentasulfide of predetermined reactivity |
-
1961
- 1961-05-12 GB GB1738161A patent/GB923330A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248602A (en) * | 1978-08-21 | 1981-02-03 | Hoechst Aktiengesellschaft | Production of phosphorus pentasulfide of predetermined reactivity |
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