6results about "Refining with acid-containing liquids" patented technology

This invention relates to a method for purifying crude pyrolysis products, the method comprising the following steps: A1) providing crude pyrolysis products containing hydrocarbons and impurities, the crude pyrolysis products being obtained at least partially through the pyrolysis of plastic waste; A2) contacting the crude pyrolysis products with an alkali metal hydroxide in a continuous mode at a temperature of 330°C to 400°C, preferably 340°C to 360°C, for a residence time of less than 10 min, to obtain a treated pyrolysis product and a residue containing reaction impurities; A3) washing the treated pyrolysis products with a polar washing solvent to obtain a purified pyrolysis product and a polar washing solvent phase; A4) separating the polar washing solvent phase and the purified pyrolysis product.

Methods for converting renewable feedstock containing refractory nitrogen to hydrocarbon fuels such as renewable diesel and jet fuel. The method may include pretreating a lipid feedstock with refractory and non-refractory nitrogen compounds to produce a pretreated lipid. The pretreated lipid is processed through a hydroprocessing reactor system comprising hydrodeoxygenation and a hydropolishing catalyst beds. Effluent from the hydroprocessing reactor system comprises a paraffinic hydrocarbon and water vapor. The water vapor and the paraffinic hydrocarbon are separated to provide a paraffinic hydrocarbon with residual refractory nitrogen and liquid water with low turbidity and a low Biological Oxygen Demand (BOD) value. The paraffinic hydrocarbon is subsequently subjected to hydroisomerization to produce an isoparaffinic hydrocarbon effluent for fractionation into a naphtha fraction and a renewable diesel fraction and / or a jet fuel fraction.

In an aspect, a method is disclosed that includes contacting a composition with an aqueous solution to yield a mixture, where the composition includes one or more of animal fats, animal oils, plant fats, plant oils, vegetable fats, vegetable oils, greases, and used cooking oil, about 5 wt.% or more of free fatty acids, about 10 wppm or more of total metals, about 8 wppm or more phosphorus, about 20 wppm or more of nitrogen, and the aqueous solution includes ((NH4)2H2EDTA, (NH4)4EDTA, a monoammonium salt of diethylenetriaminepentaacetic acid, a diammonium salt of diethylenetriaminepentaacetic acid, a triammonium salt of diethylenetriaminepentaacetic acid, a tetraammonium salt of diethylenetriaminepentaacetic acid, (NH4)5DTPA, a combination of citric acid and Na4EDTA, a combination of citric acid and Na2H2EDTA, a combination of citric acid and a monosodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a disodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a trisodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a tetrasodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and NasDTPA, or a combination of any two or more thereof, where the method further includes centrifuging the mixture to yield a first treated composition, wherein the first treated composition has less total metals and less phosphorus than the composition.

Disclosed herein is Method for selective oxidative desulfurization in oil and product thereof, which belongs to the field of energy and chemical engineering. This method operates in a polar phase composed of water and acetonitrile, through the direct oxidation of peroxide organic acids and the activation of the catalyst on the peroxide organic acids to produce active substances, for the selective removal of organic sulfides in the non-polar phase oil solution. In the polar phase, peroxide acetic acid is used as the oxidant, and low-valent transition metals are used as catalysts to activate peroxide acetic acid to produce active substances to achieve the oxidation and removal of organic sulfur in the non-polar phase.

A method for purifying a composition having a plastic liquefaction oil, wherein (a) a composition of a plastic liquefaction oil is provided, then (b) washed with a first aqueous solution to obtain an organic phase containing the washed composition and a first aqueous effluent, then (c) the organic phase of step (b) is treated in the presence of a basic compound at a temperature of at most 450° C. to obtain an organic effluent comprising a treated composition, and (d) the organic effluent of step (c) is washed with a second aqueous solution to obtain a purified composition having a reduced heteroatom content, and a second aqueous effluent. Furthermore, in step (b), the first aqueous effluent is returned in whole or in part to step (d), and / or in step (d), the second aqueous effluent is returned in whole or in part to step (b).

To provide a method for purifying a flow of synthetic crude oil.SOLUTION: A method for purifying a flow of synthetic crude oil includes a step of supplying a flow of synthetic crude oil, a step of cleaning the flow of the synthetic crude oil with first water-soluble cleaning liquid at a first temperature, so as to obtain a flow of first purified synthetic crude oil, and a step of cleaning the flow of the first purified synthetic crude oil with second water-soluble cleaning liquid at a second temperature, so as to obtain a flow of second purified synthetic crude oil, wherein the first water-soluble cleaning liquid is basic, the second water-soluble cleaning liquid is acid, and the second temperature is lower than the first temperature. A method for producing synthetic crude oil includes a step of producing a flow (1) of synthetic crude oil by depolymerization of, preferably, a synthetic resin material, particularly, a synthetic resin waste, and a step of purifying the flow (1) of the synthetic crude oil according to the method of the present invention.SELECTED DRAWING: Figure 1