Abstract:
A process for the manufacture of alkanolamines and/or a process for the conversion of alkanolamines wherein the process is performed in one or equipment items, wherein one or more steel parts of the one or more equipment items, which have one or more surfaces in contact with an alkanolamine, are made of duplex steel and Use of duplex stainless steel as a construction material for parts of an equipment item used in an alkanolamine and/or alkyleneamine manufacturing process or separation process, which have one or more surfaces in contact with alkyleneamines and/or alkanolamines and the use of duplex steel as a construction material for steel parts of a equipment items used in an alkanolamine manufacturing or conversion process.
Abstract:
The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).