METHODS OF MAKING CYCLODODECATRIENE AND METHODS OF MAKING LAUROLACTONE
The present disclosure provides processes for the preparation of dodecanedioic acid (DDDA).
1 . A process for making dodecanedioic acid comprising:
contacting 1,3-butadiene with a first catalyst and forming cyclododeca-1,5,9-triene;
oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent to form epoxycyclododeca-5,9-diene,
converting the epoxycyclododeca-5,9-diene into a first mixture comprising cyclododecanol and cyclododecanone; and
contacting the first mixture with reactants comprising a third catalyst and nitric acid to form a second mixture comprising dodecanedioic acid.
2 . The method of claim 1 , wherein the first catalyst is a homogeneous Ziegler-Natta type catalyst.
3 . The method of claim 1 , wherein the step of oxidizing the cyclododeca-1,5,9-triene is conducted in the presence of a second catalyst.
4 . The method of claim 1 , wherein the second catalyst is selected from: hydrocarbon soluble Mo naphthenate, hydrocarbon soluble V naphthenate, hydrocarbon soluble Ti naphthenate, and a combination thereof.
5 . The method of claim 1 , wherein the step of converting the epoxycyclododeca-5,9-diene into a first mixture includes converting the epoxycyclododeca-5,9-diene into the first mixture using a process selected from a selective reduction, rearrangement, or a combination thereof.
6 . The method of claim 1 , wherein the third catalyst is selected from: ammonium meta-vanadate and copper nitrate.
7 . The method of claim 1 , wherein cyclododecanol is about 30% to 70% of the first mixture, and wherein the cyclododecanone is about 70% to 30% of the first mixture.
8 . The method of claim 1 , wherein the dodecanedioic acid is about 40% to 90% of the second mixture.
9 . The method of claim 1 , wherein the oxygen containing reagent is a mixture that includes oxygen.
10 . The method of claim 1 , wherein the oxygen containing reagent is a mixture selected from the group consisting of: air enriched with pure oxygen, pure oxygen and pure nitrogen, and a combination thereof.
11 . The method of claim 10 , wherein the mixture includes an amount of oxygen to provide oxygen to the reaction in an amount of about 1% to 99%.
12 . The method of claim 1 , wherein the step of oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent further comprises an initiator selected from the group consisting of: AlBN, organic peroxides and, an azo-initiator.
13 . The method of claim 1 , wherein the step of oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent is conducted at a reaction temperature of about 50° C. to 220° C. and at a pressure of about 50 psig to 500 psig.
14 . The method of claim 1 , wherein the step of oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent further comprising a metal catalyst.
15 . The method of claim 1 , wherein the step of oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent is carried out continuously using a fixed bed catalyst.
16 . A process for making laurolactone comprising:
providing a reaction vessel including a solution of cyclododecanone (CDDK) that is dissolved in a about an equal weight of an acid anhydride;
providing to the vessel an acid catalyst in an amount effective to promote the reaction, wherein the acid catalyst is selected on the basis of its pK a such that its pK a is about 0 to about 5; and
introducing hydrogen peroxide to the reaction vessel to promote the Baeyer-Villiger oxidation, wherein about 20% or more of the cyclododecanone (CDDK) is converted to laurolactone.
17 . The method of claim 16 , wherein the acid catalyst is selected from the group consisting of: dichloroacetic acid and a peracid.
18 . The method of claim 16 , wherein the hydrogen peroxide is in an amount of about 1 to 10 moles hydrogen peroxide per mole of CDDK present in the mixture.
19 . The method of claim 16 , wherein amount effective to promote the reaction is in an amount of about 1 to 10 moles acid catalyst per mole of CDDK present in the mixture.
20 . A process for making dodecanedioic acid comprising:
contacting 1,3-butadiene with a first catalyst and forming cyclododeca-1,5,9-triene;
oxidizing the cyclododeca-1,5,9-triene using an oxygen containing reagent to form epoxycyclododeca-5,9-diene,
converting the epoxycyclododeca-5,9-diene into a first mixture comprising cyclododecanol and cyclododecanone;
disposing the cyclododecanone (CDDK) from the first mixture in a reaction vessel, wherein the CDDK is dissolved in a about an equal weight of an acid anhydride;
providing to the vessel an acid catalyst in an amount effective to promote the reaction, wherein the acid catalyst is selected on the basis of its pK a such that its pK a is about 0 to about 5; and
introducing hydrogen peroxide to the reaction vessel to promote the Baeyer-Villiger oxidation, wherein about 20% or more of the (CDDK) is converted to laurolactone.