Compared with traditional technique which takes o-chloroaniline and formaldehyde as materials,paraformaldehyde is used instead of formaldehyde aqueous solution for this method.

Methylene diphenyl dicarbamate(MDC),an intermediate for the production of methylene diphenyl diisocyanate,was directly synthesized from dimethyl carbonate(DMC),aniline,and formaldehyde solution over the bifunctional H4SiW12O40-ZrO2/SiO2 catalyst.

The DNA extraction,in General,from samples stored in formaldehyde solution is inefficient,especially extracted from small individual.

Study on solvent ration of Cross-current extraction of furfural aqueous solution;