US 12,006,484 B2
Method and system for preparing fuel by using high acid value biological oil and fat
Bin Xu, Hong Kong (CN); Kam Shing Siu, Hong Kong (CN); Chunjian Xu, Tianjin (CN); and Yongchao He, Tianjin (CN)
Assigned to ECO Environmental Energy Research Institute Limited, Hong Kong (CN); and Tianjin University, Tianjin (CN)
Filed by ECO Environmental Energy Research Institute Limited, Hong Kong (CN); and Tianjin University, Tianjin (CN)
Filed on Jul. 31, 2021, as Appl. No. 17/390,941.
Application 17/390,941 is a continuation of application No. PCT/CN2020/073766, filed on Jan. 22, 2020.
Claims priority of application No. 201910104447.6 (CN), filed on Feb. 1, 2019; and application No. 201920184673.5 (CN), filed on Feb. 1, 2019.
Prior Publication US 2021/0355393 A1, Nov. 18, 2021
Int. Cl. C10L 1/02 (2006.01); B01D 3/00 (2006.01); B01D 3/10 (2006.01); B01J 19/24 (2006.01); C10G 3/00 (2006.01); C10L 1/08 (2006.01)
CPC C10L 1/026 (2013.01) [B01D 3/009 (2013.01); B01D 3/10 (2013.01); B01J 19/245 (2013.01); C10G 3/40 (2013.01); C10G 3/42 (2013.01); C10G 3/50 (2013.01); C10L 1/08 (2013.01); B01J 2219/0004 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/1014 (2013.01); C10G 2300/202 (2013.01); C10G 2300/207 (2013.01); C10G 2300/301 (2013.01); C10G 2300/302 (2013.01); C10G 2300/308 (2013.01); C10G 2300/4018 (2013.01); C10G 2400/04 (2013.01); C10L 2200/0476 (2013.01); C10L 2200/0484 (2013.01); C10L 2290/02 (2013.01); C10L 2290/543 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for preparing fuel using high-acid-value biological grease, comprising:
(a) subjecting the high-acid-value biological grease to thermal cracking and deoxidization under a first set of heating conditions;
(b) subjecting a product of step (a) to vacuum distillation to separate water, a high-acid-value fraction, a low-acid-value fraction and a heavy component;
(c) catalytically cracking and deoxidizing the high-acid-value fraction obtained in the step (b) to separate water and non-condensable gas in the presence of a catalytic cracking deoxidization catalyst under a second set of heating conditions; and
(d) catalytically hydrodeoxygenating a mixture of a product obtained in the step (c) and the low-acid-value fraction obtained in the step (b) with hydrogen in the presence of a hydrodeoxygenation catalyst under a third set of heating conditions.