Control of low inventory alkylation unit
December 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAcid-type hydrocarbon alkylation with acid recycle streams at spaced points of a vertically-disposed elongated reactor Acid type hydrocarbon alkylation with acid-soluble oil addition Catalytic alkylation of hydrocarbons Apparatus for continuously measuring acid gravity in a hydrocarbon-acid system Catalytic alkylation process and apparatus Procedure for measuring contents of hydrocarbons in liquids containing such Environmentally safe catalytic alkyation using liquid onium poly (hydrogen fluorides) Determination of aromatics in hydrocarbons by near infrared spectroscopy and calibration therefor Patent #: 5145785 InventorsAssigneeApplicationNo. 160565 filed on 12/01/1993US Classes:436/55, CONDITION RESPONSIVE CONTROL250/339.08, Including Fourier transform infrared spectrometry250/339.11, Measuring infrared radiation reflected from sample250/339.12, Using sample absorption for chemical composition analysis422/67, With specific analytical program control means422/68.1, Means for analyzing liquid or solid sample422/82.05, Measuring optical property by using ultraviolet, infrared, or visible light422/111, Material is an input to contact zone436/60, LUBRICANT, GREASE, MINERAL OIL, HYDROCARBON OIL PRODUCT, OR FATS OR LIPIDS FOR OXIDATION (E.G., BREAKDOWN PRODUCTS OR CONTAMINATION, ETC.)436/61, Acidity, basicity or neutralization number436/139, HYDROCARBON436/171, Spectrum analysis (e.g., flame photometry, etc.)585/725B-, N-, or P-containingExaminersPrimary: Santiago, Amalia L.Attorney, Agent or FirmInternational ClassG01N 021/35AbstractA method and system for controlling an HF alkylation system comprising a reactor, a settler, an HF acid regenerator and a source of fresh HF acid wherein a stream of olefins and a stream of isobutanes are contacted in the reactor in the presence an HF acid catalyst. At least the reactor feed is sampled, and the sample is passed to an analyzer using an attenuated total reflectance cell. Signals are generated which are representative of infrared spectra of the samples in a range providing information on the amount of at least one of HF, water, ASO and sulfolane. These signals are simultaneously determined and generated because all absorb in the same spectral region. This aspect provides for viewing these distortions of the main HF absorption band to quantify these three components. The infrared spectra signals are compared with stored signals to generate control signals; and at least one of HF, water and sulfolane fed to the reactor feed is adjusted in response to the control signal.Other References
Field of SearchControl element responds proportionally to a variable signal from a sensorControls heat transfer Controls flow rate of a material to or from a contact zone Material is an input to contact zone With specific analytical program control means Means for analyzing liquid or solid sample Measuring optical property by using ultraviolet, infrared, or visible light CONDITION RESPONSIVE CONTROL LUBRICANT, GREASE, MINERAL OIL, HYDROCARBON OIL PRODUCT, OR FATS OR LIPIDS FOR OXIDATION (E.G., BREAKDOWN PRODUCTS OR CONTAMINATION, ETC.) Acidity, basicity or neutralization number HYDROCARBON Spectrum analysis (e.g., flame photometry, etc.) Using sample absorption for chemical composition analysis Including Fourier transform infrared spectrometry Measuring infrared radiation reflected from sample B-, N-, or P-containing |
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