795results about "Extraction purification/separation" patented technology

The invention relates to a process for the manufacture of diesel range hydrocarbons wherein a feed is hydrotreated in a hydrotreating step and isomerised in an isomerisation step, and a feed comprising fresh feed containing more than 5 wt % of free fatty acids and at least one diluting agent is hydrotreated at a reaction temperature of 200-400° C., in a hydrotreating reactor in the presence of catalyst, and the ratio of the diluting agent / fresh feed is 5-30:1.

A method of producing a fuel composition from a bio-oil feedstock is provided, wherein the bio-oil feedstock is subjected to a step of oil extraction to produce a bio-oil and deoiled residue. At least a portion of the deoiled residue is gasified to produce a hydrogen-containing gas. The bio-oil is subjected to an upgrading process to ultimately produce a fuel composition. At least a part of the hydrogen-containing gas produced in the gasification of deoiled residue is used in the upgrading process of producing a fuel composition. The upgrading process, which can involve hydro-treating, hydroisomerization and at least one separation step, produces light hydrocarbons in addition to the product fuel composition. The light hydrocarbons can be used in the gasification operation, e.g., to reduce tar formation.

At lower temperatures an acidic molecular sieve adsorbent preferentially adsorbs water and basic organic nitrogen compounds over weakly basic organic nitrogen compounds such as nitrites. Elevated temperatures improve the capacity of acidic molecular sieve adsorbents to adsorb nitrites in the presence of water.

A method of producing a fuel composition from a bio-oil feedstock is provided, wherein the bio-oil feedstock is subjected to a step of oil extraction to produce a bio-oil and deoiled residue. At least a portion of the deoiled residue is gasified to produce a hydrogen-containing gas. The bio-oil is subjected to an upgrading process to ultimately produce a fuel composition. At least a part of the hydrogen-containing gas produced in the gasification of deoiled residue is used in the upgrading process of producing a fuel composition. The upgrading process, which can involve hydro-treating, hydroisomerization and at least one separation step, produces light hydrocarbons in addition to the product fuel composition. The light hydrocarbons can be used in the gasification operation, e.g., to reduce tar formation.

This invention relates to a process for removing polarizable impurities from hydrocarbons and mixtures of hydrocarbons using ionic liquids as an extraction medium. By way of extraction, the degree of contamination of the hydrocarbon or mixture of hydrocarbons is reduced to a low or very low level. The specific ionic liquids are compounds of the Formula 1, which are organic salts that are liquid or can be melted to form a liquid and that can form at least a biphasic mixture with a hydrocarbon. The process is suitable for purifying a wide range of hydrocarbons under a wide range of process conditions.

The invention discloses equipment and a method for extracting biologically active ingredients from subcritical fluid, aims to solve the problems of low extraction efficiency and the like existing in the aspects of biologically active ingredient separation technology in the prior art and provides a set of subcritical equipment which comprises an extracting agent supply system, an entrainer supply system, an extraction system, a separation system, a solvent recycling system, a desolvation system, a heat supply system, a computer control system and the like, has high automatic control degree and is used for extracting the biologically active ingredients. Simultaneously, the invention also provides a new technological method for extracting the biologically active ingredients by adopting a subcritical extraction process. The method has the advantage of relatively low cost on the conventional extraction of an organic solvent, and the equipment has the characteristics of no solvent residue, no pollution, high bioactivity and the like in a product obtained by supercritical CO2 extraction technology and has the advantages of low investment on production equipment, high production efficiency within unit time, low energy consumption, flexible operation, high degree of automation and the like.

The invention generally relates to purification of carbon nanomaterials, particularly fullerenes, by removal of PAHs and other hydrocarbon impurities. The inventive process involves extracting a sample containing carbon nanomaterials with a solvent in which the PAHs are substantially soluble but in which the carbon nanomaterials are not substantially soluble. The sample can be repeatedly or continuously extracted with one or more solvents to remove a greater amount of impurities. Preferred solvents include ethanol, diethyl ether, and acetone. The invention also provides a process for efficiently separating solvent extractable fullerenes from samples containing fullerenes and PAHs wherein the sample is extracted with a solvent in which both fullerenes and PAHs are substantially soluble and the sample extract then undergoes selective extraction to remove PAHs. Suitable solvents in which both fullerenes and PAHs are soluble include o-xylene, toluene, and o-dichlorobenzene. The purification process is capable of treating quantities of combustion soot in excess of one kilogram and can produce fullerenes or fullerenic soot of suitable purity for many applications.

The present invention relates to a method for recovering methane gas by adding a gas mixture containing N2 and CO2 gases to natural gas hydrate and reacting them. The method for recovering methane gas from natural gas hydrate of the present invention comprises the step of replacing CH4 gas in natural gas hydrate with a gas mixture containing N2 and CO2 gases by adding the gas mixture to the natural gas hydrate. The method for recovering methane gas of the invention assures a recovery rate of CH4 gas much higher than prior art method without dissociating natural gas hydrate layer and utilization of flue gas as a gas mixture containing N2 and CO2 gases, which makes possible its practical application for the production of natural gas in terms of economy and environmental protection.

Disclosed herein is a method for separating from the reactor effluent of an olefin oligomerization procedure those catalyst materials and polymeric by-products which can cause difficulties in the downstream processing of such effluent. Polymer by-products and catalyst in the effluent are separated from reaction products by flash vaporization utilizing an in-situ hot solvent which is contacted with the effluent and serves as the heating medium to promote this flash vaporization step. Subsequent processing of a liquid portion of the effluent which is left after flash vaporization involves recovery of catalyst and polymeric by-products therefrom in a steam stripping vessel. Also disclosed is a multiple reactor system which can be used for continuous trimerization of ethylene to 1-hexene while at the same time washing polymeric by-products from one of the reactors in the series using a wash oil solvent.

The invention relates to a process for the manufacture of diesel range hydrocarbons wherein a feed is hydrotreated in a hydrotreating step and isomerised in an isomerisation step, and a feed comprising fresh feed containing more than 5 wt % of free fatty acids and at least one diluting agent is hydrotreated at a reaction temperature of 200-400° C., in a hydrotreating reactor in the presence of catalyst, and the ratio of the diluting agent / fresh feed is 5-30:1.

The present invention relates to a process for separating the isoprene, 1,3-pentadiene and dicyclopentadiene from a C5 cuts, comprising dimerization of the cyclopentadiene and selective catalytic hydrogenation. The second extractive rectification step can be omitted, because the alkynes are removed through selective catalytic hydrogenation prior to the extractive rectification. As a result, the solvent-recovering units can be simplified, and thus the process as a whole can be optimized. Correspondingly, the investment and energy consumption, the operation cost, and finally the production cost can be substantially reduced.

Chitosan membranes chelated with silver or cuprous material may be used to separate olefins from a mixture of olefins and paraffins. The feed stream is humidified, demisted, treated to remove sulfur compounds and passed to a cell having a chitosan membrane containing chelated silver or cuprous compounds. The process has a reasonable flux rate and is operable at reasonable temperatures and pressures. The process could be used in an olefin separation train.

A supercritical fluid polymer depolymerization machine is disclosed herein, which machine is capable of converting a wide range of biomass and / or waste plastic materials into a plurality of reaction products (liquid and gaseous) including fermentable sugars, hydrocarbons, and various aromatic substances that, in turn, are readily convertible into liquid transportation fuel known as “neodiesel.” In one embodiment, a supercritical fluid reaction apparatus for transforming a selected polymeric material flowstream into a plurality of reaction products is disclosed and comprises, in fluidic series: an extruder; a supercritical fluid reaction zone fluidicly connected to the extruder, the supercritical fluid reaction zone being proximate to a circumferentially positioned heater, with the heater being configured to transfer heat to the selected polymeric material flowstream admixed together with water to supercritical conditions to thereby facilitate chemical reaction; and a reaction products separation chamber fluidicly connected to the supercritical fluid reaction zone.

Provided for herein is a process for separating a hydrocarbon-rubber from a hydrofluorocarbon diluent comprising contacting a polymer slurry comprising the hydrocarbon-rubber dispersed within the hydrofluorocarbon diluent with a hydrocarbon solvent capable of dissolving the hydrocarbon-rubber, to produce a first liquid phase and a second liquid phase, and separating the first liquid phase from the second liquid phase.

A method for rapidly extracting lycopene belongs to the technical field of food ingredients. The present invention extracts lycopene from raw materials rich in lycopene, and after the raw materials rich in lycopene are preliminarily treated, lycopene is extracted by assisting solvent reflux with ultrasonic / microwave synergy technology, and concentrated to obtain lycopene oleoresin products; and recover solvents. The invention has simple steps, greatly shortens the extraction time, and avoids the loss of lycopene in the extraction process; the extraction rate is high, and the highest extraction rate can reach 97%; the extraction process adopts a closed system, the solvent consumption is small, the cost is reduced, and the cost is improved at the same time. It improves the safety of production; microwave is used as the heating source, and the energy directly acts on the extraction system, which reduces the waste of energy and has the characteristics of energy saving.