Adipic Acid

Abstract

a To convert Pa to mm Hg divide by 133.3. b To convert J to cal divide by 4.184. 554 ADIPIC ACID Vol. 1 a A function of particle size. b To convert J to cal divide by 4.184. c To convert MPa to psi multiply by 145.

Aerobic oxidation of 1,6-hexanediol to adipic acid over Au-based catalysts: the role of basic supports

“…Adipic acid (AA) is an important aliphatic dicarboxylic acid with the highest world production and is mostly used as a starting material in the synthesis of polyamide (nylon-6,6), fibers, adipic esters as plasticizers in PVC, polyurethanes, lubricants, food additives and many other applications. 1,2 In 2014, 2839 kton was the global production and it is predicted to further grow with about 2% increase each year. 3 It is due also to the retreat of the nylon sector over non-nylon applications.…”

Adipic Acid Production via Metal-Free Selective Hydrogenolysis of Biomass-Derived Tetrahydrofuran-2,5-Dicarboxylic Acid

“…Adipic acid (AA) is an essential commodity chemical used in the commercial production of Nylon-6,6 and polyurethanes. , AA has been produced almost exclusively from petroleum-derived cyclohexane in an inefficient oxidation process which releases N 2 O, a potent greenhouse gas (Scheme ). In this process, cyclohexane is first oxidized to create KA oil, a mixture of cyclohexanone and cyclohexanol, over Co catalysts (cobalt­(II) naphthenate) using air as an oxidant.…”

“…To maintain high selectivity in this reaction (70–90%), the reaction is typically conducted at low conversions (3 to 8%), which necessitates extensive feed recycling and inflated capital costs. AA is then obtained by oxidizing KA oil under harsh conditions using nitric acid, with the production of undesired N 2 O . Tightening regulations on greenhouse gas emissions make the development of renewable and environmentally benign processes for AA production increasingly desirable.…”

A View Through Novel Process Windows

“…[66] In industry, adipic acid is typically produced from cyclohexane in a two-step process, but unfortunately this process suffers from several serious drawbacks. [67] In the first step of the process, cyclohexane is converted by air oxidation to yield a mixture of cyclohexanone and cyclohexanol (the so-called KA-oil). For this reaction step, a high selectivity (85-90%) can only be achieved by operating at a very low conversion (4-8%).…”