22results about "Gasoline stabilisation" patented technology

The utility model belongs to the field of high-octane gasoline production, and particularly relates to a device for producing high-octane gasoline from topped oil through non-hydroisomerization. The raw material conveying pump is connected with the C4 feeding device through a valve and is used for conveying the raw materials; the raw material / reaction product heat exchanger is connected with the raw material conveying pump and is used for carrying out heat exchange on the raw materials; according to the utility model, the topped oil of the reforming device is used as a raw material, a second-section feeding process and a third-section feeding process are added in the reactor, and a circulating gas process from the outlet of the compressor to the reaction system is added, so that the raw material / reaction product is obtained. Under the non-hydrogen condition, the reaction depths of alkane cracking, selective hydrogenation, isomerization and the like of the low-octane-number topped oil are improved on the basis of the catalyst, the low-octane-number topped oil is converted into the high-octane-number gasoline blending component, the octane number of the produced gasoline can reach 89-90, the saturated vapor pressure is 65-80 kPa, the improvement cost is low, and the production operation is simple.

The present disclosure provides methods and systems for producing a C4+ compound, including the steps of: (i) reacting a feed stream comprising C1+O1-3 hydrocarbons in the presence of an acid condensation (AC) catalyst at a condensation temperature and condensation pressure to produce an AC product stream including the C4+ compound; (ii) fractionating AC product stream into an AC liquid product stream including organic products and a vapor stream; (iii) fractionating the AC liquid product stream by a fractionation column into a liquid C4+ compound product stream and a gaseous overhead stream; (iv) cooling the gaseous overhead stream to produce a liquid reflux stream and a gaseous vent stream; (v) recycling a first portion of the liquid reflux stream to the fractionation column for the fractionation in step (iii); and (vi) recycling a second portion of the liquid reflux stream to the feed stream for the reaction in step (i).

The present disclosure provides methods and systems for producing a C4+ compound, including the steps of: (i) reacting a feed stream comprising C1+O1-3 hydrocarbons in the presence of an acid condensation (AC) catalyst at a condensation temperature and condensation pressure to produce an AC product stream including the C4+ compound; (ii) fractionating AC product stream into an AC liquid product stream including organic products and a vapor stream; (iii) fractionating the AC liquid product stream by a fractionation column into a liquid C4+ compound product stream and a gaseous overhead stream; (iv) cooling the gaseous overhead stream to produce a liquid reflux stream and a gaseous vent stream; (v) recycling a first portion of the liquid reflux stream to the fractionation column for the fractionation in step (iii); and (vi) recycling a second portion of the liquid reflux stream to the feed stream for the reaction in step (i).

A method and apparatus for desulfurizing and separating catalytic cracking light products. The method includes the following steps: 1) contacting the catalytic cracking light products with a desulfurizing adsorbent in an adsorptive desulfurization reaction unit in the presence of hydrogen for desulfurization, and optionally subjecting the desulfurized products to gas-liquid separation to obtain a desulfurized rich gas and a desulfurized crude gasoline. The catalytic cracking light products are overhead oil gas from a catalytic cracking fractionation tower or a rich gas and a crude gasoline from a catalytic cracking fractionation tower; and 2) separately sending the desulfurized rich gas and the desulfurized crude gasoline obtained in step 1) to a catalytic cracking absorption stabilization system for separation to obtain a desulfurized dry gas, a desulfurized liquefied gas, and a desulfurized stabilized gasoline. The method and apparatus are suitable for use in treating the catalytic cracking light products obtained from the catalytic cracking fractionation tower, and can produce a high yield of refined gasoline and a low octane loss.

Process for converting an oxygenate feed stream, the process comprising the steps of: conducting the oxygenate feed stream to an oxygenate-to-gasoline reactor, suitably a methanol-to-gasoline reactor (MTG reactor) under the presence of a catalyst active for converting oxygenates in the oxygenate feed stream into a raw gasoline stream com-prising C3-C4 paraffins and C5+ hydrocarbons; and adding an aromatic stream to the MTG reactor.

An isomerization method consists of a deisobutanizer column receives feed comprising n-butane. The deisobutanizer column delivers its bottoms a portion to a reboiler and another portion along with hydrogen is routed to a isomerization reactor and the reactor effluent is returned to the column. A stabilizer which is integrated with the column, an overhead stream used as a reflux and bottoms containing an iso-butane-rich stream that is the iso-butane product stream. The column overhead effluent is routed to separator, which splits the hydrocarbons and effluent, where the hydrocarbons are routed to deisobutanizer column and effluent recycled to stabilizer, where the stabilizer separates the reactor effluent into product streams contains an iso-butane product stream, a n-butane product stream, and a lighter hydrocarbon product stream.

Process for converting an oxygenate feed stream, the process comprising the steps of: conducting the oxygenate feed stream to an oxygenate-to-gasoline reactor, suitably a methanol-to-gasoline reactor (MTG reactor) under the presence of a catalyst active for converting oxygenates in the oxygenate feed stream into a raw gasoline stream comprising C3-C4 paraffins and C5+ hydrocarbons; and adding an aromatic stream to the MTG reactor.

A process is provided for dechlorinating and separating a mixture of n-butane and alkylate. The process includes separating, in a separation zone, a feed stream comprising light hydrocarbons, propane, isobutane, organic chlorides, n-butane, and alkylate with C5+ hydrocarbons into an overheads stream comprising light hydrocarbons, propane, and isobutane and a bottoms stream comprising organic chlorides, n-butane and alkylate; passing the bottoms stream to a catalytic dechlorination zone configured to convert the organic chlorides to HCl and paraffins under catalytic dechlorination conditions, the catalytic dechlorination zone comprising a vessel and being configured to provide a HCl-rich stream, an n-butane-rich stream, optionally an isopentane-rich stream, and an alkylate-rich stream; removing the HCl-rich stream from the catalytic dechlorination zone as a gaseous overheads product; recovering the n-butane-rich stream from the catalytic dechlorination zone as a liquid side-draw product; optionally recovering the isopentane-rich stream from the catalytic dechlorination zone as a side-draw product; and recovering the alkylate-rich stream from the catalytic dechlorination zone as a liquid bottoms product.

A method for the desulfurization and separation of a catalytic cracking light product includes the steps of: 1) contacting a catalytic cracking light product with a desulfurization adsorbent in an adsorption desulfurization reaction unit in the presence of hydrogen for desulfurization, and optionally carrying out gas-liquid separation on the resulting desulfurization product, to obtain a desulfurized rich gas and a desulfurized crude gasoline, wherein the catalytic cracking light product is an overhead oil-gas fraction from a catalytic cracking fractionator, or a rich gas and a crude gasoline from a catalytic cracking fractionator; and 2) separately sending the desulfurized rich gas and the desulfurized crude gasoline obtained in the step 1) to a catalytic cracking absorption stabilization system for separation, to obtain a desulfurized dry gas, a desulfurized liquefied gas and a desulfurized stabilized gasoline.

Process and plant for producing a gasoline product from an oxygenate feed stream, the process including the provision of a methanol-to-gasoline reactor in a gasoline synthesis loop. The process and plant may include combination of an overhead stream from a de-ethanizer, e.g. a fractionation column, located downstream the cooling and separation of the raw gasoline produced in the methanol-to-gasoline reactor, in the gasoline synthesis loop.

This utility model discloses a high-efficiency crude oil stabilization tower, including a shell, a crude oil inlet and multiple sieve plates on the shell, and a distributor between the crude oil inlet and the sieve plates. The distributor includes a horizontally arranged distribution channel and multiple vertically arranged spray channels. The distribution channel has multiple channels, and the multiple channels correspond to the multiple spray channels. Each of the multiple spray channels has an overflow hole. In this high-efficiency crude oil stabilization tower, crude oil enters the shell through the crude oil inlet and flows into the distribution channel. Subsequently, the crude oil flows into the multiple spray channels through the multiple channels, so that the crude oil is distributed to various positions on the sieve plates through the overflow holes on the multiple spray channels, minimizing the accumulation of high-viscosity crude oil on the uppermost sieve plate.

An objective of the present invention is therefore to provide a process for producing middle distillates and in particular diesel from a paraffinic feedstock produced by Fischer-Tropsch synthesis comprising at least one hydroconversion step and at least one hydroisomerization step arranged in series, the operating conditions and the catalysts used in said steps being chosen in a very specific manner, to selectively produce a distillate cut, preferably diesel, while minimizing the production of light cuts such as C1-C4 light gases, naphtha and the production of oil, the latter being limited to a possible purge on an effluent recycle. Figure 1 to be published

This utility model discloses a crude oil stabilization and oil-gas separation device, including a base plate. A heat-insulating oil tank is fixedly connected to the upper edge of the base plate. A heating mechanism is provided on the lower surface of the base plate. A motor is installed on the end face of the heat-insulating oil tank. A sealing box is fixedly connected to the inner wall of the heat-insulating oil tank next to the motor. A stirring rod is fixedly installed at the end of the motor output shaft. A main bevel gear is fixedly connected to the outer wall of the end of the stirring rod. A transmission rod is movably installed on the inner wall of the sealing box above the main bevel gear. A main gear is fixedly connected to the upper outer wall of the transmission rod, and a secondary bevel gear is fixedly provided on the lower end face of the transmission rod. A feed pipe is fixedly installed through the upper surface of the heat-insulating oil tank away from the exhaust pipe. This crude oil stabilization and oil-gas separation device facilitates the removal of solid impurities from crude oil before oil-gas separation, thereby reducing the impact of solid impurities on oil-gas separation and improving the practicality of the device.

A hydrocarbon separation system comprising a dividing wall column is disclosed. The dividing wall column having feed section, top section, bottom section, and side draw section. The top section may be configured to fractionate top product components to produce the first hydrocarbon fraction process stream containing C3 hydrocarbons. The side draw section may be configured to fractionate the second hydrocarbon fraction process stream containing C4 hydrocarbons and the bottom section may be configured to fractionate bottom product consisting of C5+ components to produce natural gasoline (NG) product stream. Corresponding process and apparatus for separation of hydrocarbon feed are disclosed.

The application relates to a scale inhibitor and a preparation method thereof, in particular to a high-efficiency environment-friendly scale inhibitor for an ethylene device gasoline stripping tower and a preparation method thereof, which comprises the following components in mass parts: an antioxidant 2-15, an aromatic amine polymerization inhibitor 2-15, a hydroxylamine polymerization inhibitor 4-16, a metal passivator 10-20, a dispersant 10-40 and a solvent 20-50. The scale inhibitor can greatly improve the polymerization inhibition performance, further improve the scale inhibition performance of the scale inhibitor, and ensure good operation of the ethylene device gasoline stripping tower.

A positive pressure heating crude oil stabilization system parameter optimization method and device, the method comprises the following steps: constructing a crude oil stabilization simulation model of a positive pressure heating crude oil stabilization system, at least including a stabilization tower module and a pre-tower heating furnace module; inputting crude oil component parameters into the crude oil stabilization simulation model, and setting the heating furnace outlet temperature as different temperature values T n sequentially; n Carrying out positive pressure heating crude oil stabilization process simulation to obtain the stabilization tower overhead pressure P n and fuel consumption F n corresponding to the highest light hydrocarbon yield Q n at each temperature value T n ; calculating the corresponding profit value A n according to each set of yield and energy consumption data, each set of yield and energy consumption data comprising Q n and F n ; obtaining the maximum profit value from N profit values A n , and taking the T n and P n corresponding to the maximum profit value as the optimal heating furnace outlet temperature and the optimal stabilization tower overhead pressure respectively; and based on the crude oil stabilization simulation model, analyzing the light hydrocarbon yield and fuel energy consumption to ensure the maximum economic benefit while saving energy and reducing costs.

The present invention discloses a system for efficiently utilizing the low-temperature heat of the top circulating oil of a catalytic cracking unit fractionation tower. The system comprises a first reboiler and a second reboiler arranged in parallel at the bottom of a gas separation depropanizer. The heat source inlet of the first reboiler of the depropanizer is connected to a catalytic top circulating oil delivery pipe, and the heat source outlet is connected to a post-exchange catalytic top circulating oil pipe. The heat source inlet of the second reboiler of the depropanizer is connected to a depropanizer reboiler steam pipe, and the heat source outlet is connected to a depropanizer condensate return pipe. The inlet of a steam generator is connected to the condensate inlet pipe, and the condensate inlet pipe is directly connected to the depropanizer condensate return pipe or is connected via a steam condensate tank. The heat source inlet of the steam generator is connected to the post-exchange catalytic top circulating oil pipe, and the heat source outlet is connected to a catalytic top circulating oil return pipe. The negative pressure steam outlet of the steam generator is connected to the inlet of a first-stage steam compressor. This system greatly reduces the external steam required for the second reboiler of the depropanizer in the prior art, and has significant economic benefits.

Assemblies and methods to enhance a refining process associated with a refining operation may include supplying a material to first processing units associated with the refining operation. The assemblies and methods also may include conditioning unit material samples, and analyzing the samples via one or more spectroscopic analyzers. The assemblies and methods further may include prescriptively controlling, via one or more refinery process controllers, based at least in part on the unit material properties, the refinery processing assembly, so that the prescriptively controlling results in causing the refining process to produce intermediate materials, the unit materials, and / or the downstream materials having properties within selected ranges of target properties, thereby to cause the refining process to achieve material outputs that more accurately and responsively converge on one or more of the target properties.