US 11,731,121 B2
Process for preparation of highly coordinated sulfated mixed metal oxide catalyst having high crushing strength
Chaitanya Sampara, Mumbai (IN); Pushkar Varshney, Faridabad (IN); Reshmi Manna, Faridabad (IN); Saravanan Subramani, Faridabad (IN); Madhusudan Sau, Faridabad (IN); Debasis Bhattacharyya, Faridabad (IN); and Sankara Sri Venkata Ramakumar, Faridabad (IN)
Assigned to Viridis Chemicals Private Limited, Mumbai (IN); and Indian Oil Corporation Limited, Mumbai (IN)
Filed by Viridis Chemicals Private Limited, Mumbai (IN); and Indian Oil Corporation Limited, Mumbai (IN)
Filed on Feb. 18, 2021, as Appl. No. 17/178,619.
Claims priority of application No. 202021007171 (IN), filed on Feb. 19, 2020.
Prior Publication US 2021/0252495 A1, Aug. 19, 2021
Int. Cl. B01J 35/00 (2006.01); B01J 21/06 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 31/04 (2006.01); B01J 35/02 (2006.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01)
CPC B01J 35/0046 (2013.01) [B01J 21/066 (2013.01); B01J 23/42 (2013.01); B01J 23/44 (2013.01); B01J 31/04 (2013.01); B01J 35/023 (2013.01); B01J 37/0009 (2013.01); B01J 37/0036 (2013.01); B01J 37/0045 (2013.01); B01J 37/0236 (2013.01); B01J 37/031 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A process for synthesis of high coordination sulfated mixed metal oxide catalyst, the process comprising:
a) dissolving Zirconium nitrate or acetate in distilled water;
b) precipitating Zirconium hydroxide using diethylamine, washing with double distilled water, and drying;
c) loading sulfate ions on the dried Zirconium hydroxide using Ammonium sulfate or Ammonium persulfate with ammonia as a competing ion;
d) reducing particle size of the sulfate ions loaded Zirconium hydroxide obtained in step (c) from 310 μm to 44 μm by milling;
e) reducing particle size of high surface area acidified alumina from 90 μm to 44 μm by milling, and further mixing with the sulfate ions loaded Zirconium hydroxide obtained in step (c) in a ball mill to obtain a joint particle size of less than 37 μm;
f) adding the mixture obtained in step (e) to a binder liquid comprising α-amino acids, HNO3 and H2SO4 and mixing to maintain a pH in a range of 1.5 to 3.8, wherein the α-amino acids are a combination of α-amino acid with a non-polar side chain and α-amino acid with a basic side chain;
g) peptizing followed by extruding after settling the mixture obtained in step f) for 30 minutes;
h) drying the extrudates obtained in step g) at 100-200° C. for 6 hours followed by calcination; and
i) adding a hydrogenating component.