| CAS No.: | 124-04-9 |
|---|---|
| Color: | White |
| Appearance: | Powder |
| Transport Package: | Paper |
| Specification: | large |
| Trademark: | china |
| Samples: |
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Audited Supplier Adipic acid (hexanedioic acid) and pimelic acid (heptanedioic acid) pyrolyze differently from the acids with a smaller number of carbon atoms. The typical reaction for these acids is the elimination of H2O and CO2 with the formation of a ketone by the following reaction:
The decomposition of these acids starts around 350-400°C, but the reaction has the same result even at higher temperatures. Pyrolysis of adipic acid at 900°C in a flash pyrolysis experiment generated mainlyand some undecomposed adipic acid [12]. Low levels of 2-cyclopentylidenecyclopentan-2-one also were found in the pyrolyzate. The reactions leading to and further to 2-cyclopentylidene-cyclopentan-2-one are shown below:
Substituted adipic and pimelic acids can be used for the preparation of ketones using reactions of the type (12.2.18).
Adipic acid is a substance used for the preparation of nylon, polyurethanes, and other products of commercial interest. The industrial synthesis of adipic acid usesoxidation of a mixture of and Cyclohexanonetermed "KA oil" (ketone and alcohol-oil). This procedure generates a substance that increases greenhouse gases, damages the ozone layer, and causes acid rain. On a laboratory scale, it has been traditionally prepared from by oxidation with An alternative with less environmental impact than the traditional method involves the preparation of adipic acid from oxidation with and sodium tungstate. This procedure is considered a green method and involves a series of events that make a low environmental impact:
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