Soaps produced from oil-bearing microbial biomass and oils
View Patent ↗Soap and cosmetic products can be made from oil-bearing microbial biomass via the alkaline hydrolysis of glycerolipids and fatty acid esters to fatty acid salts. The saponified microbial oils/lipids can be combined with a variety of additives to produce compositions for use as soaps and other cosmetic products, which may also contain other constituents of the biomass, including unsaponified oils, glycerol and carotenoids, among others.
1. A soap comprising fatty acid salts of saponified microalgal lipid, the soap comprising at least 10% C18, wherein the microalgal lipid contains no more than 500 ppm color-generating impurities, and further wherein the microalgal lipid is saponified by contacting with an aqueous solution containing a base that saponifies the microalgal lipid.
2. The soap of claim 1 , wherein said lipid contains less than 0.01 mg/kg of chlorophyll.
3. The soap of claim 1 , wherein said microalgal lipid comprises at least 50% fully saturated fatty acids.
4. The soap of claim 1 , wherein said lipid contains at least 10% C16:0 and at least 10% C18:0.
5. The soap of claim 1 , wherein said lipid contains at least 10% C16:0.
6. The soap of claim 1 , wherein at least 10% of said lipid is C14:0 or lipid of shorter chain length.
7. The soap of claim 1 that further comprises fatty acid salts of a saponified oil selected from the group consisting of palm oil, coconut oil, olive oil, cocoa oil, chicken fat, beef tallow, porcine tallow, soy oil, rapeseed oil, canola oil, palm kernel oil, corn oil, waste vegetable oil, Chinese tallow, sunflower oil, cotton seed oil, microalgae oil, macroalgae oil, Cuphea oil, flax oil, peanut oil, choice white grease, lard, Camelina sativa oil, mustard seed oil, cashew nut oil, oat oil, lupine oil, kenaf oil, calendula oil, hemp oil, coffee oil, linseed (flax) oil, hazelnut oil, euphorbia oil, pumpkin seed oil, coriander oil, camellia oil, sesame oil, safflower oil, rice oil, tung oil, copra oil, opium poppy oil, castor bean oil, pecan oil, jojoba oil, jatropha oil, macadamia oil, Brazil nut oil, avocado oil, and fossil oil or a distillate fraction thereof.
8. The soap of claim 1 , wherein the lipid is derived from a strain of microalgae selected from the group consisting of Parachlorella, Prototheca, Chlorella , and strains having at least 85% nucleotide sequence identity in 23S rRNA sequences to a Parachlorella, Prototheca, or Chlorella strain.
9. The soap of claim 1 , wherein at least 90% of the lipid is saponified.
10. The soap of claim 1 , wherein said soap comprises microbial cell biomass in addition to said lipid.
11. The soap of claim 10 , wherein less than 10% of the lipid in the biomass is saponified.
12. The soap of claim 10 , wherein at least 5% of the dried cell weight of the biomass is lipid.
13. The soap of claim 10 , wherein at least 50% of the dried cell weight of the biomass is lipid.
14. The soap of claim 10 , wherein the biomass contains lysed cells.
15. The soap of claim 1 , wherein said soap comprises at least 30% C18.
16. The soap of claim 15 , wherein said soap comprises at least 50% C18.
17. The soap of claim 1 , wherein said soap comprises at least 10% C18:0 and at least 10% C18:1.
18. The soap of claim 17 , wherein said soap comprises at least 30% C18:1.
19. The soap of claim 1 , wherein said soap comprises at least 10% C16, at least 10% C18:0 and at least 10% C18:1.
20. The soap of claim 19 , wherein said soap comprises at least 30% C18:1.
21. The soap of claim 1 , wherein said soap comprises at least 10% C14 or lipid of shorter chain length, at least 10% C16, at least 10% C18:0 and at least 10% C18:1.
22. The soap of claim 21 , wherein said soap comprises at least 20% C14 or lipid of shorter chain length and at least 30% C18:1.
23. A soap prepared by saponification of microalgal biomass by contacting with an aqueous solution containing a base that saponifies lipid of the microalgal biomass forming fatty acid salts, wherein the microalgal biomass comprises at least 5% lipid by dry cell weight, said soap further comprising at least 10% C18; the biomass contains no more than 500 ppm color-generating impurities and the soap comprises the fatty acid salts.
24. The soap of claim 23 , wherein at least 50% of the biomass is lipid.
25. The soap of claim 23 , wherein said biomass contains less than 0.01 mg/kg of chlorophyll.
26. The soap of claim 23 , wherein said lipid comprises at least 50% fully saturated fatty acids.
27. The soap of claim 23 , wherein said lipid contains at least 10% C16:0 and at least 10% C18:0.
28. The soap of claim 23 , wherein said lipid contains at least 10% C16:0.
29. The soap of claim 23 , wherein at least 10% of said lipid is C14:0 or fatty acid of shorter chain length.
30. The soap of claim 23 that further comprises fatty acid salts of a saponified oil selected from the group consisting of palm oil, coconut oil, olive oil, cocoa oil, chicken fat, beef tallow, porcine tallow, soy oil, rapeseed oil, canola oil, palm kernel oil, corn oil, waste vegetable oil, Chinese tallow, sunflower oil, cotton seed oil, microalgae oil, macroalgae oil, Cuphea oil, flax oil, peanut oil, choice white grease, lard, Camelina sativa oil, mustard seed oil, cashew nut oil, oat oil, lupine oil, kenaf oil, calendula oil, hemp oil, coffee oil, linseed (flax) oil, hazelnut oil, euphorbia oil, pumpkin seed oil, coriander oil, camellia oil, sesame oil, safflower oil, rice oil, tung oil, copra oil, opium poppy oil, castor bean oil, pecan oil, jojoba oil, jatropha oil, macadamia oil, Brazil nut oil, avocado oil, and fossil oil or a distillate fraction thereof.
31. The soap of claim 23 , wherein the biomass is derived from a strain of microalgae selected from the group consisting of Parachlorella, Prototheca, Chlorella , and strains having at least 85% nucleotide sequence identity in 23S rRNA sequences to a Parachlorella, Prototheca, or Chlorella strain.
32. The soap of claim 23 , wherein less than 10% of the lipid in the biomass is saponified.
33. The soap of claim 23 , wherein at least 50% of the dried cell weight of the biomass is lipid.
34. The soap of claim 23 , wherein the biomass contains lysed cells.
35. The soap of claim 23 , wherein said soap comprises at least 30% C18.
36. The soap of claim 35 , wherein said soap comprises at least 50% C18.
37. The soap of claim 23 , wherein said soap comprises at least 10% C18:0 and at least 10% C18:1.
38. The soap of claim 37 , wherein said soap comprises at least 30% C18:1.
39. The soap of claim 23 , wherein said soap comprises at least 10% C16, at least 10% C18:0 and at least 10% C18:1.
40. The soap of claim 39 , wherein said soap comprises at least 30% C18:1.
41. The soap of claim 23 , wherein said soap comprises at least 10% C14 or lipid of shorter chain length, at least 10% C16, at least 10% C18:0 and at least 10% C18:1.
42. The soap of claim 41 , wherein said soap comprises at least 20% C14 or lipid of shorter chain length and at least 30% C18:1.