Renewable chemical production from novel fatty acid feedstocks
View Patent ↗Disclosed herein are methods of manufacturing renewable chemicals through the manufacture of novel triglyceride oils followed by chemical modification of the oils. Methods such as transesterification, hydrogenation, hydrocracking, deoxygenation, isomerization, interesterification, hydroxylation, hydrolysis and saponification are disclosed. Novel oils containing fatty acid chain lengths of C8, C10, C12 or C14 are also disclosed and are useful as feedstocks in the methods of the invention.
1. A method of manufacturing a chemical, comprising the steps of:
(A) cultivating a cell of the genus Prototheca that comprises an exogenous fatty acyl-ACP (acyl carrier protein) thioesterase gene that encodes a fatty acyl-ACP thioesterase having hydrolysis activity towards one or more fatty acyl-ACP substrates of chain length C8, C10, C12 or C14, wherein the cell produces triglyceride oil that has—
(a) a lipid profile of at least 4% C8-C14; and
(b) at least one of the following attributes:
i. less than 0.4 micrograms/ml of total carotenoids;
ii. less than 0.001 micrograms/ml of lycopene;
iii. less than 0.02 micrograms/ml of beta carotene;
iv. less than 0.02 milligrams of chlorophyll per kilogram of oil;
v. 0.40-0.60 milligrams of gamma tocopherol per 100 grams of oil;
vi. 3-9 mg campesterol per 100 grams of oil; or
vii. less than 0.5 milligrams of total tocotrienols per gram of oil;
(B) performing one or more chemical reactions comprising transesterification, hydrogenation, hydrocracking, deoxygenation, isomerization, interesterification, hydroxylation, and/or hydrolysis on the triglyceride oil to form the chemical; and
(C) separating the chemical from the reaction mixture remaining after performing step (B).
2. The method of claim 1 , wherein step (B) comprises performing a hydrolysis reaction.
3. The method of claim 2 , wherein the hydrolysis reaction comprises a hydrolysis reaction selected from the group consisting of saponification, acid hydrolysis, alkaline hydrolysis, enzymatic hydrolysis, catalytic hydrolysis, and hot compressed water hydrolysis.
4. The method of claim 2 , wherein the hydrolysis reaction comprises a catalytic hydrolysis reaction and wherein the oil is split into glycerol and fatty acids.
5. The method of claim 4 , wherein the fatty acids formed undergo an ozonolysis reaction to produce monobasic- and dibasic acids.
6. The method of claim 2 , wherein the oil undergoes a triglyceride splitting method selected from the group consisting of enzymatic splitting and pressure splitting.
7. The method of claim 2 , wherein the hydrolysis reaction comprises a saponification reaction.
8. The method of claim 2 , wherein a condensation reaction follows a hydrolysis reaction.
9. The method of claim 1 , wherein the oil has a lipid profile of 4% to 30% C8-C14.
10. The method of claim 1 , wherein the triglyceride oil is blended with at least one of the following oils before performing the one or more chemical reactions: soy, rapeseed, canola, palm, palm kernel, coconut, corn, waste vegetable, Chinese tallow, olive, sunflower, cotton seed, chicken fat, beef tallow, porcine tallow, microalgae, macroalgae, Cuphea, flax, peanut, choice white grease, lard, Camelina sativa, mustard seed, cashew nut, oats, lupine kenaf, calendula, hemp, coffee, hazelnut, euphorbia, pumpkin seed, coriander, camellia, sesame, safflower, rice, tung tree, cocoa, copra, plum poppy, castor beans, pecan, jojoba, jatropha, macademia, Brazil nuts, avocado, petroleum, or a distillate fraction of any of the preceding oils.
11. The method of claim 1 , wherein the chemical reactions are hydrogenation and deoxygenation and the chemical produced is separated from naphtha components.
12. The method of claim 11 , further comprising subjecting the chemical to an isomerization step.
13. The method of claim 1 , wherein the chemical reaction is hydrogenation and the chemical produced is a fatty alcohol.
14. The method of claim 1 , wherein the chemical reaction is transesterification and the chemical produced is a fatty acid ester.
15. The method of claim 1 , wherein the chemical produced is an alkane mixture that comprises renewable diesel.
16. The method of claim 1 , wherein the chemical produced is an alkane mixture with a T10-T90 of at least 20° C.
17. The method of claim 1 , wherein the cell is cultured in a medium containing sucrose and the cell further comprises an exogenous invertase gene.
18. The method of claim 1 , wherein the cell further comprises an endogenous desaturase gene that is knocked out or down-regulated.
19. The method of claim 1 , wherein the separating step comprises distillation, extraction, filtration, and/or crystallization.
20. A method of manufacturing a soap product comprising the steps of:
(A) cultivating a cell of the genus Prototheca that comprises an exogenous fatty acyl-ACP (acyl carrier protein) thioesterase gene that encodes a fatty acyl-ACP thioesterease having hydrolysis activity towards one or more fatty acyl-ACP substrates of chain length C8, C10, C12 or C14, wherein the cell produces triglyceride oil that has
(a) a lipid profile of at least 4% C8-C14; and
(b) at least one of the following attributes:
i. less than 0.4 micrograms/ml total carotenoids;
ii. less than 0.001 micrograms/ml lycopene;
iii. less than 0.02 micrograms/ml beta carotene;
iv. less than 0.02 milligrams of chlorophyll per kilogram of oil;
v. 0.40-0.60 milligrams of gamma tocopherol per 100 grams of oil;
vi. 3-9 mg campesterol per 100 grams of oil;
vii. less than 0.5 milligrams of total tocotrienols per gram of oil;
(B) isolating the triglyceride oil from other microalgal components;
(C) performing a saponification reaction on the triglyceride oil;
thereby producing a soap product.