| http://www.w3.org/ns/prov#value | - The reaction temperature may be selected from optionally, and generally is selected from 0??? to 120??? C., preferably from about 0??? to 70??? C. The reaction time is depend on the type of the starting materials, catalyst, reaction temperature and other factors used in the reaction, and generally the reaction may be completed within about 0.5 to 6 hours.
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