Method for preparing polyether amine catalyst, and polyether amine

A method for preparing a polyether amine catalyst, wherein the polyether amine catalyst is a supported metal catalyst and γ-Al2O3 is used as an alumina carrier, basic cupric carbonate, basic nickel carbonate and basic cobalt carbonate are used as precursors for supporting metals, and the polyether amine catalyst is prepared by performing twice adsorption roasting and once reduction by means of an equivalent-volumetic impregnation method, the method comprises:

• S1. solution preparation:
• adding basic cupric carbonate, basic nickel carbonate and basic cobalt carbonate to deionized water, and performing stirring until the basic cupric carbonate, the basic nickel carbonate and the basic cobalt carbonate are completely dissolved, so as to obtain a solution A;
• S2. immersion and adsorption:
• impregnating the alumina carrier into the solution A obtained in S1, allowing resulting mixture to stand after rotary immersion in a water bath, after a adsorption equilibrium of the alumina carrier is arrived, rising a temperature of a resulting system to 90° C., performing vacuum dehydration and drying, and then removing the alumina carrier, so as to obtain an intermediate carrier;
• S3. roasting:
• placing the intermediate carrier obtained in S2 into a muffle furnace for temperature programming, and performing roasting at a set temperature of 420° C.;
• S4. twice adsorption and roasting:
• using the intermediate carrier roasted in S3 as a carrier, repeating S2 and S3 for twice adsorption and roasting, wherein a metal salt ratio during a second immersion is the same as a ratio during a first immersion;
• and
• S5. reduction:
• after cooling, performing, at 420° C. and a hydrogen atmosphere in a reduction furnace, rotary reduction on the intermediate carrier after twice adsorption and roasting, so as to obtain the polyether amine catalyst with γ-Al2O3 as the alumina carrier.