Process for producing long chain amino acids and dibasic acids
There is disclosed a process for the production of dodecanedioic acid and 11-aminoundecanoic acid, comprising: (1) reacting castor oil with a primary or secondary amine to form a amide; (2) isomerizing the amide in the presence of a catalyst to form ketoamide; (3) reacting the ketoamide with hydroxylamine to form the oximeamide; (4) subjecting the oximeamide to Beckmann rearrangement to yield a mixture of two diamides; and (5) hydrolyzing the mixed diamides to produce dodecanedioic acid, 11-aminoundecanoic acid, hexylamine and heptanoic acid.
1. A process for producing dodecanedioic acid and 11-aminoundecanoic acid, comprising:
(a) reacting castor oil with a primary or secondary amine HNR 1 R 2 to form an amide of formula (Ib):
in the absence or in the presence of at least one solvent, wherein R 1 and R 2 are each independently hydrogen, or C 1 to C 12 aliphatic or aromatic groups;
(b) isomerizing the amide of formula (Ib) in the presence of at least one catalyst to form a ketoamide of formula (IIa):
(c) subjecting the ketoamide of formula (IIa) to an oximation reaction with hydroxylamine or an ammoximation reaction with ammonia and hydrogen peroxide in the presence of an ammoximation catalyst to form an oximeamide of formula (IIIc):
(d) subjecting the oximeamide of formula (IIIc) to Beckmann rearrangement to yield a mixture of diamides of formulas (IVe) and (IVf):
(e) hydrolyzing the mixed diamides of formulas (IVe) and (IVf) with an acid or a base to dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa) of the structures:
and
(f) separating the dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa).
2. A process for producing dodecanedioic acid and 11-aminoundecanoic acid, comprising:
(a) reacting castor oil with a primary or secondary amine HNR 1 R 2 to form an amide of formula (Ib):
in the absence or in the presence of at least one solvent, wherein R 1 and R 2 are each independently hydrogen, or C 1 to C 12 aliphatic or aromatic groups;
(b) hydrogenating the amide formula (Ib) to form 12-hydroxystearic acid amide of the formula (Id):
(c) oxidizing the 12-hydroxystearic acid amide formula (Id) to form a ketoamide of formula (IIa):
(d) subjecting the ketoamide of formula (IIa) to an oximation reaction with hydroxylamine or an ammoximation reaction with ammonia and hydrogen peroxide in the presence of an ammoximation catalyst to form an oximeamide of formula (IIIc):
(e) subjecting the oximeamide of formula (IIIc) to Beckmann rearrangement to yield a mixture of diamides of formulas (IVe) and (IVf):
(f) hydrolyzing the mixed diamides of formulas (IVe) and (IVf) with an acid or a base to dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa) of the structures:
and
(g) separating the dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa).
3. A process for producing dodecanedioic acid and 11-aminoundecanoic acid, comprising:
(a) hydrogenating castor oil to form hydrogenated castor oil of formula (Ic):
(b) reacting the hydrogenated castor oil of formula (Ic) with a primary or secondary amine HNR 1 R 2 to form a hydroxyamide of formula (Id):
in the absence or in the presence of at least one solvent, wherein R 1 and R 2 are each independently hydrogen, or C 1 to C 12 aliphatic or aromatic groups;
(c) oxidizing the hydroxyamide of formula (Id) to form a ketoamide of formula (IIa):
(d) subjecting the ketoamide of formula (IIa) to an oximation reaction with hydroxylamine or an ammoximation reaction with ammonia and hydrogen peroxide in the presence of an ammoximation catalyst to form an oximeamide of formula (IIIc):
(e) subjecting the oximeamide of formula (IIIc) to Beckmann rearrangement to yield a mixture of diamides of the formulas (IVe) and (IVf):
(f) hydrolyzing the mixed diamides of formulas (IVe) and (IVf) with an acid or a base to dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa) of the structures:
and
(g) separating the dodecanedioic acid (Va), 11-aminoundecanoic acid (VIa), hexylamine (VIIa), and heptanoic acid (VIIIa).
4. The process according to claim 1 , wherein the reaction of the castor oil and the HNR 1 R 2 is performed at a temperature from 80° C. to 180° C.
5. The process according to claim 1 , wherein the HNR 1 R 2 is hexylamine.
6. The process according to claim 1 , wherein the isomerization catalyst is selected from the group of pentacarbonyl iron, Raney Ni, and Pd/C.
7. The process according to claim 1 , wherein a catalyst for the Beckmann rearrangement of the oximeamide of formula (IIIc) is selected from the group consisting of sulfuric acid, alkylsulfonic acid, arylsulfonic acid, or perfluorocarboxylic acids, thionyl chloride, sulfuryl chloride, chlorosulfonic acid, methanesulfonyl chloride, toluenesulfonyl chloride, acetyl chloride, benzoyl chloride, oxalyl chloride, phosgene, diphosgene, triphosgene, boron trichloride, phosphorus trichloride, phosphorus pentachloride, oxyphosphoryl chloride, cyanuric chloride, phosphorazine, zinc chloride, ferric chloride, cobalt chloride, stannous chloride, aluminum chloride, titanium chloride, boron trichloride, and a mixture of two or more thereof.
8. The process according to claim 2 , wherein the HNR 1 R 2 is hexylamine.
9. The process according to claim 3 , wherein the reaction of the hydrogenated castor oil and the HNR 1 R 2 is performed at a temperature from 80° C. to 180° C.
10. The process according to claim 3 , wherein the HNR 1 R 2 is hexylamine.