	US 12,134,738 B2
	Method for producing renewable hydrocarbons
Olli Byman, Porvoo (FI); Annika Malm, Porvoo (FI); Ronny Wahlström, Porvoo (FI); Tuula Lehtimaa, Porvoo (FI); and Hemanathan Kumar, Porvoo (FI)
Assigned to NESTE OYJ, Espoo (FI)
Filed by Neste Oyj, Espoo (FI)
Filed on Apr. 7, 2023, as Appl. No. 18/297,196.
Claims priority of application No. 20225301 (FI), filed on Apr. 7, 2022.
Prior Publication US 2023/0323214 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 3/00 (2006.01)

CPC C10G 3/40 (2013.01) [C10G 3/42 (2013.01); C10G 3/50 (2013.01); C10G 3/60 (2013.01); C10G 2300/1014 (2013.01); C10G 2300/1018 (2013.01); C10G 2300/202 (2013.01); C10G 2300/205 (2013.01); C10G 2300/4006 (2013.01)]

26 Claims

1. A method for producing renewable hydrocarbons, the method comprising:

i) providing a first feedstock comprising at least one of triglycerides and free fatty acids and dissolved impurities, wherein the dissolved impurities comprise impurities comprising phosphorus and impurities comprising at least one metal, and obtaining a net elementary charge Q1 based on phosphorus and the at least one metal of the first feedstock,

ii) mixing the first feedstock with an elementary charge balancing component to obtain a feedstock to be purified, wherein the feedstock to be purified has a net elementary charge Qt based on phosphorus and the at least one metal within a range of from −5 to 15 mmol elementary charge/kg of the feedstock to be purified, wherein the net elementary charge Qt is different from the net elementary charge Q1;

iii) subjecting the feedstock to be purified to heat treatment at a temperature of 180-400° C., to form precipitate compounds comprising phosphorus and the at least one metal;

iv) removing the formed precipitate compounds to obtain a purified feedstock; and

v) subjecting the purified feedstock to hydrotreatment using a catalyst sensitive to at least one of the impurities comprising phosphorous and the impurities comprising at least one metal; wherein

a net elementary charge Q based on phosphorus and the at least one metal of a feedstock is obtained by equation (I):

Q=(C_P×Q_P)+Σ_i(c_M_{_i}×Q_M_{_i}) (I)

wherein

C_Pis a concentration of dissolved phosphorus in the feedstock in mmol/kg of feedstock,

Q_Pis an elementary charge of dissolved phosphorus in the feedstock,

C_Miis a concentration of dissolved metal i in the feedstock in mmol/kg of feedstock,

Q_Miis an elementary charge of the dissolved metal i in the feedstock, and

i is a number of dissolved metals in the feedstock,

such that for Q1, the feedstock is the first feedstock, and for Qt, the feedstock is the feedstock to be purified.