| The definitions contained in this "Chemical Glossary" are merely generic definitions that may prove helpful to those using this Web site. They do not supercede, nor are they intended to supercede, the definitions or specifications that may apply to various technical terms as they are used in specific Chevron Phillips Chemical documents, agreements, proposals or offerings, or in Chevron Phillips Chemical or third party patents. | |
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| Degradation |
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The degeneration of the chemical structure, physical properties, or appearance of a chemical substance such as a plastic due to exposure to light, heat, oxygen, or other reagents. |
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| Density |
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The mass per unit volume. A common specification for chemical substances. |
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| Dimethyl-terephthalate |
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A.k.a DMT. An intermediate petrochemical derived from p-xylene. DMT is a traditional raw material for polyester resins but production facilities are being phased out in favor of more efficient terepthalic acid (TPA) plants. |
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| Disproportionation |
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A chemical reaction in which a single compound serves as both oxidizing and reducing agent, such as the dealkylation of toluene to give benzene (the more reduced product) and xylene (the more oxidized product). |
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Distillation |
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A common manufacturing process for separation/purification in which a liquid is converted to a vapor and the vapor is then condensed to a liquid. |
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