3 results about "Pentane" patented technology

New methods for determining the volumetric composition and saturation of methane and NGLs (natural gas liquids: ethane, propane, butane, and pentane) in a petroleum reservoir combining NMR (nuclear magnetic resonance) logging and NMR core analysis and for determining the mean pore-size and tortuosity of the light hydrocarbon-filled porosity in a petroleum reservoir using NMR core analysis.

The invention discloses a catalyst-based chlorinated neopentane preparation technology which is characterized in that a addition reaction is carried out on isoamylene and 36% of hydrochloric acid (in mass percent) under the condition of zinc chloride, the molar ratio of the zinc chloride to the isoamylene is 3:500-6:500, the molar ratio of the isoamylene to hydrochloric acid is 1:1.1-1:1.3, the reaction temperature is 5+/-1 DEG C, and the reaction time is 4-5 hours. The catalyst-based chlorinated neopentane preparation technology has the beneficial effects of having simple technology, being convenient to prepare, easy to realize and short in reaction time, having less addition side reaction, high product content and yield, effectively solving the problem that high content pentane chloride cannot be produced if phosphorous acid is not coproduced, and being considerable in economic benefit.

The invention provides a pretreatment method for measuring a passivator in transformer oil. The method comprises the following steps of: weighing 1-5g of transformer oil, and dissolving in 5ml of n-pentane; activating and balancing in 2-4ml of activating agent by using a solid-liquid column extractor; gradually sampling to the solid-liquid column extractor with the flow rate of lower than 1-4ml/min; respectively washing twice by using 10ml of n-pentane; drying for 8-10min in vacuum to ensure that an object to be measured is enriched on the solid-liquid column extractor; eluting by using an eluant; collecting to a measuring bottle for measuring; and completing pretreatment of a sample. By using the method, a high-purity and concentrated target detecting object can be enriched, other interference impurities are removed, the quality is stable, and the sample has high recovery rate.