Claims
- 1. In the process of preparing solid phosphorus pentasulfide of low reactivity from liquid phosphorus pentasulfide, the improvement comprising solidifying the liquid on a cooling cylinder to abruptly cool it to a temperature of 150.degree.-220.degree. C., immediately scraping the solidified material from the cooling cylinder and depositing the scrapings in a container having thermally insulated walls, without the application of external heat permitting the deposited scrapings to dissipate their heat content through those insulated walls at a rate that lowers their temperature not more than 30.degree. C. per hour for between one and four hours to control the reactivity of the final product, and then more rapidly further cooling the thus-cooled scrapings to below 65.degree. C.
- 2. The combination of claim 1 in which the cooling in the thermally insulated container is from about 207.degree. C. to about 160.degree. C., over a period of about 2 hours.
Parent Case Info
This application is in part a continuation of application Ser. No. 71,307 filed Aug. 30, 1979, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2838550 |
Mar 1980 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
71307 |
Aug 1979 |
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