07-06-2018 дата публикации
Номер: US20180156772A1
A method for predicting the critical solvent power of a visbroken residue stream of interest, CSPcomprises predicting CSPfrom the critical percentage titrant of an atmospheric residue stream, CPT, the atmospheric residue stream being derived from the same crude oil as the visbroken residue stream of interest. A method for predicting the solvent power of a visbroken residue stream of interest, SP, comprises predicting SPfrom the critical solvent power of the visbroken residue stream, CSP, and the critical percentage titrant of the visbroken residue stream, CPT. CPTis derived from the critical percentage cetane of the visbroken residue stream, CPC, which, in turn, is calculated from the P-value of the visbroken residue stream. The methods may be used to predict the stability of a fuel oil containing the visbroken residue. 2. The method of claim 1 , wherein CPTis predicted using the following formula:{'br': None, 'sub': AR', 'AR', 'AR, 'CPT=100−(100*CSP)/SP'} [{'sub': 'AR', 'CSPis the critical solvent power of the atmospheric residue, and'}, {'sub': 'AR', 'SPis the solvent power of the atmospheric residue.'}], 'wherein3. The method of claim 2 , wherein CSPis assumed to be equal to the critical solvent power of the crude oil from which the atmospheric residue is derived.4. The method of claim 2 , wherein SPis predicted from the bulk properties of the atmospheric residue.7. A method for predicting the solvent power of a visbroken residue stream of interest claim 2 , SP claim 2 , said method comprising:{'sub': 'VisRes(OI)', 'claim-text': {'br': None, 'sub': VisRes(OI)', 'VisRes', 'VisRes, 'SP=(100×CSP)/(100−CPT)'}, 'predicting SPusing the following formula [{'sub': 'VisRes', 'CSPis the critical solvent power of the visbroken residue stream, and'}, {'sub': 'VisRes', 'CPTis the critical percentage titrant (vol %) for asphaltene stability in the visbroken residue stream,'}], 'wherein{'sub': VisRes', 'VisRes, 'claim-text': {'br': None, 'sub': VisRes', 'VisRes, 'CPT=CF+CPC'}, ...
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