transitive. To decompose (heavy oils such as petroleum) by the application of heat and high pressure alone or by means of a catalyst so as to…
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| 单词 | θ209300 |
| 释义 | society > occupation and work > industry > working with specific materials > oil refining or separating processes > [verb (transitive)] (4) crack1868 transitive. To decompose (heavy oils such as petroleum) by the application of heat and high pressure alone or by means of a catalyst so as to… strip1922 Oil Industry. To separate (crude oil or gas) into fractions, to fractionate; to extract or recover (a light fraction) from a mixture. sweeten1924 In various technical uses: To bring to the desired quality or condition. Oil Industry. To free (petroleum products) from sulphur or sulphur compounds. re-refine1973 transitive. To refine again. Now esp. of oil (cf. refine, v. 1b). |
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