Method for nitrilation reaction of acrylic acid ester
A method for nitrilation reaction of acrylic acid ester using a metal-doped titanium dioxide (TiO 2 ) catalyst includes synthesizing a metal-doped titanium dioxide (TiO 2 ) catalyst by mixing a titanium precursor, a metal precursor and an acid solvent, and obtaining a final product by injecting a gas containing ammonia and ethyl acrylate to the catalyst.
1 . A method for nitrilation reaction of acrylic acid ester, comprising:
synthesizing a metal-doped titanium dioxide (TiO 2 ) catalyst by mixing a titanium precursor comprising titanium (IV) isopropoxide (TTIP), a metal precursor comprising magnesium nitrate, and an acid solvent; and
obtaining acrylonitrile (AN) as a final product by injecting a gas containing ammonia and ethyl acrylate to the catalyst.
2 . The method of claim 1 , wherein the titanium dioxide (TiO 2 ) catalyst has an anatase structure.
3 . The method of claim 1 , wherein the metal precursor further comprises magnesium (Mg) or aluminum (Al).
4 . The method of claim 1 , wherein the metal precursor further comprises aluminum nitrate.
5 . The method of claim 1 , wherein the acid solvent comprises citric acid (CA).
6 . The method of claim 1 , wherein the synthesizing of the catalyst comprises:
preparing a first mixed solution by mixing the titanium precursor and an organic solvent;
preparing a second mixed solution by mixing the first mixed solution with the metal precursor and an acid solution;
drying a mixture of the second mixed solution and ethylene glycol; and
firing a dried product.
7 . The method of claim 6 , wherein preparing the second mixed solution comprises mixing the ethylene glycol and the metal precursor in a molar ratio of 10 to 15:1.
8 . The method of claim 1 , wherein synthesizing the catalyst comprises mixing the acid solvent and the metal precursor in a molar ratio of 1 to 3:1.
9 . The method of claim 1 , wherein synthesizing the catalyst comprises mixing the metal precursor in an amount of 0.5 to 3 wt % based on an amount of the titanium precursor used.
10 . The method of claim 1 , wherein, in the obtaining of the final product, a concentration of the ammonia in the gas that is injected is 1 to 15 vol %.
11 . The method of claim 1 , wherein obtaining the final product is performed at a temperature of 250° C. to 400° C.
12 . The method of claim 1 , wherein obtaining the final product is performed at a gas hourly space velocity (GHSV) of 500 to 4000/hour.
13 . The method of claim 1 , wherein a time for which a reaction yield (AN production yield) of the final product converted from ethyl acrylate is maintained at 90% or more is 25 hours or more.