Process for the interconversion of crystalline forms of ethylene

Details Process for the interconversion of crystalline forms of ethylene Process for the interconversion of crystalline forms of ethylene

1979-06-22

1981-02-03

Niebling, John F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260428, C09F 500, C11C 300

Patent

active

042487927

ABSTRACT:
A process for preparing alpha and beta crystalline forms of N,N'-ethylene bis-stearamide (EBS). Heating of EBS at temperatures of 120.degree.-160.degree. C. to melt the EBS results in formation of 95+% alpha which when cooled to 40.degree. C. or less remains in the alpha state, but upon reheating to about 80.degree. C. results in 95+% conversion to the beta crystalline form. Heating of the alpha crystalline form at temperatures ranging from about 45.degree.-90.degree. C. for selected periods of time results in mixtures of alpha and beta.

REFERENCES:
patent: 3677963 (1972-07-01), Lichtman
Sakwrai, T., Chem. Absts. vol. 50, No. 6125 (1956).
Kornev, K., et al., Chem. Absts. vol. 67, No. 9002 (1965).

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