Method drastically reduces preparation time of pentaerythritol diformal (2, 4, 8, 10-tetroxaspiro (5.5) undecane) from several hours to time span of 3 to 20 minutes with yields greater than 90 percent. Other advantages include elimination of solvents, decrease in labor and energy needs, adaptability to continuous operations, and overall simplicity and convenience.
Collector performance after weathering
NASA Tech Briefs ; 4 , 3
1980-04-01
Miscellaneous
No indication
English
Weathering of a liquid solar collector
NTRS | 1980
Weathering of a liquid-filled solar collector
NTRS | 1979
Weathering of a flat-plate solar collector
NTRS | 1980
SAE Technical Papers | 1993
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