Method of producing high-quality polyethylenepolyamines

Details Method of producing high-quality polyethylenepolyamines Method of producing high-quality polyethylenepolyamines

1997-08-04

1999-01-19

Burn, Brian M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564497, C07C20984

Patent

active

058615377

ABSTRACT:
The invention provides a method of industrially producing high-quality polyethylenepolyamines, which exerts high decolorizing effect and is economical, comprising the steps that hydrogen halide is added to a mixture of polyethylenepolyamines and heated, then distillation is performed to fractionate components each having a boiling point not higher than that of triethylenetetramine, next alkali metal hydroxide is added to that residual liquor after distillation to neutralize, and distillation is performed again to fractionate components each having a boiling point not lower than that of tetraethylenepentamine.

REFERENCES:
patent: 5364971 (1994-11-01), Su et al.

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