STERICALLY HINDERED AMINES AND ASSOCIATED METHODS.

摘要

Amine compositions comprising sterically hindered amines and associated methods are provided. Amine compositions of the present disclosure may be useful for selective removal of H2S from an acidic gas stream. Under certain conditions, such as C02 rich conditions and/or high bis-(tertiarybutylaminoethoxy) ethane content, certain amines for selectively removing H2S gas may become phase separated. A higher molecular weight polyethylene glycol may be reacted with a tertiarybutylamine to produce a mixture of sterically hindered amines that provides good performance without the problem of phase separation. The sterically hindered amines may be made without the need for a solvent, thereby simplifying their production. The methods of the present disclosure may be considered more "environmentally friendly" in that they produce higher yields of desirable amine products with minimal to no production of undesirable by-products, which may also reduce the costs associated with making sterically hindered amines.