High-purity alkanolamines and their production process
AssigneeNippon Shokubai Co., Ltd.
InventorsKenji Muraoka, Toshiaki Saito, Yukio Kadono
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Abstract
High-purity alkanolamines, whose iron content is less than 50 ppb, are provided. Said high-purity alkanolamines can be produced by covering with an alkanolamine-resistant material at least a part of the inner wall of equipment that contacts alkanolamines from the top of the distillation tower to the storage tank in producing a high-purity alkanolamine from a crude alkanolamine by using distillation towers.
Claims3
High-purity alkanolamines, whose iron content is less than 50 ppb.
A production process of a high-purity alkanolamine characterized by covering with an alkanolamine-resistant material at least a part of the inner wall of equipment that contacts alkanolamines from the top of the distillation tower to the storage tank in producing a high-purity alkanolamine by distillation of a crude alkanolamine.
Dependencies are inferred from the claim text.