Catalyst and carrier with function of catalytically synthesizing amine by taking alcohol as raw material as well as preparation method and application of catalyst and carrier
A catalyst and a technology for synthesizing amines, applied in the field of ammoniation reaction, can solve the problems of low catalytic activity, achieve the effects of accelerating the reaction rate, promoting diffusion, and improving the acidity of the carrier
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[0029] According to the present invention, the carrier can be prepared by an existing method capable of obtaining the ammonia adsorption capacity meeting the above range, and obtaining a carrier with the ammonia adsorption capacity meeting the above range can be implemented by those skilled in the art. However, according to a preferred embodiment of the present invention, the carrier is prepared by a method comprising the following steps: sequentially molding, drying and calcining the mixture containing dopant ions and carrier precursor, wherein the carrier modifier It is at least one of an inorganic acid containing dopant ions and an inorganic salt containing dopant ions (the inorganic acid is not hydrochloric acid), and the temperature of the calcination is above 800°C. The molding method can be kneading, ball rolling or chipping.
[0030] In the preparation method of the above carrier, the carrier precursor can be selected from pseudoboehmite, silicon oxide precursor (such ...
Embodiment 1
[0057] Pseudoboehmite powder (specific surface area 380m 2 / g, pore volume 1.09ml / g) kneaded with dilute acid water containing 5vol% nitric acid and 3.5vol% phosphoric acid, extruded into strips, dried at 120°C for 10h, and then calcined at 850°C for 4h to make the required The carrier, the specific parameters are shown in Table 1.
[0058] 141.56g nickel nitrate hexahydrate (industrial grade, purity 98%) was dissolved into 166mL solution with water, and its pH value was adjusted to 4.3, and the solution was loaded on the obtained 100g alumina carrier by spraying twice, each spraying After immersion, all were dried at 120°C for 8 hours, then calcined at 400°C for 4 hours, then gradually reduced with hydrogen at a rate of 20°C / hour, and finally reduced at 440°C for 3 hours to obtain catalyst C-1 .
Embodiment 2
[0060] Pseudoboehmite powder (specific surface area 400m 2 / g, pore volume 1.15ml / g) kneaded with dilute acid water containing 5vol% nitric acid and 3vol% boric acid, added silica sol (JN-40, Qingdao Ocean) during the kneading process, extruded into strips, dried at 120°C for 12h, Then calcined at 900°C for 4 hours to make the required carrier. The specific parameters are shown in Table 1. The amount of pseudo-boehmite powder and silica sol makes the Al in the carrier 2 o 3 with SiO 2 The weight ratio is 4:1.
[0061] 176.38g of cobalt nitrate hexahydrate (industrial grade, purity 98%) was dissolved into 160mL solution with water, and its pH value was adjusted to 3.9, and the solution was loaded on the obtained 100g carrier by wet immersion twice. All were dried at 120°C for 6 hours, then calcined at 390°C for 4 hours, then gradually reduced with hydrogen at a rate of 20°C / hour, and finally reduced at 460°C for 5 hours to obtain catalyst C-2.
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