LOW-TEMPERATURE TRANSPORT AND STORAGE OF AMINO-AIR SOLUTIONS FOR GAS PROCESSING

摘要

1. A method for transporting a liquid amino ester acid gas absorbent having a pour point of at least -29 ° C (-20 ° F) through a cold climate zone for use in an acid gas treatment method in which the amino ester absorbent is mixed with a cold climate zone water to form a mixture of amino ester and water with a water content of about 10 to 40% with respect to the weight of the amino ester. 2. The method of claim 1, wherein the mixture of the amino ester and water is transported from the first climatic zone to the second climatic zone, the first climatic zone being warmer with respect to the second climatic zone, the first climatic zone having an ambient temperature at which the amino ester remains unfrozen, and the second climatic zone has an ambient temperature that is lower than the freezing temperature of the amino ester itself, and the concentration of water in the mixture of the amino ester and water is sufficient to lower the eratury freezing mixture to a temperature below the ambient temperature in the second climate zone.3. The method according to claim 2, wherein the mixture of the amino ester and water is stored in a place located in the second climatic zone, at a temperature below the freezing temperature of the amino ester itself. The method of claim 2, wherein the amino ester comprises a diethylene glycol derivative or a triethylene glycol derivative containing a highly sterically hindered amino group and having an E (Taft constant) of at least 1.75.5. A method for storing a liquid amino acid acid gas absorbent for use in a method for treating acid gas in a cold climate zone having an ambient temperature of