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Hydrocarbon recombinant alkylating desulfurization method for catalytically cracked gasoline

A technology of catalytic cracking gasoline and alkylation desulfurization, which is applied in the fields of gasoline desulfurization and hydrocarbon reorganization alkylation desulfurization of catalytic cracking gasoline, which can solve the problem of insufficient boiling point of alkylthiophene derivatives, poor sulfur transfer effect, and occupation of substitution positions And other problems, to achieve the effect of mild operating conditions, small construction investment, and increase the boiling point

Inactive Publication Date: 2010-05-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the existing technologies separate low-carbon olefins from low-boiling point thiophene sulfides. In this case, low-carbon olefins can easily react with low-boiling point thiophene sulfides to occupy the substitution position, and the resulting alkylthiophene derivatives The boiling point of the substance is not high enough, so the sulfur transfer effect is not good

Method used

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  • Hydrocarbon recombinant alkylating desulfurization method for catalytically cracked gasoline
  • Hydrocarbon recombinant alkylating desulfurization method for catalytically cracked gasoline
  • Hydrocarbon recombinant alkylating desulfurization method for catalytically cracked gasoline

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Effect test

Embodiment 1

[0026]The catalytic cracked gasoline of Tianjin Petrochemical Company with a sulfur content of 324ppm was added to the preprocessor equipped with NKC-9 ion exchange resin at a flow rate of 300g / h, and the catalytic cracked gasoline was removed at an operating pressure of 0.3MPa and a temperature of 25°C Basic nitrogen compounds in the basic nitrogen compounds; the catalytic cracking gasoline that removes basic nitrogen compounds enters the primary fractionation tower of continuous operation for separation. The light fraction of catalytically cracked gasoline including C4-C5 olefins is produced at 79g / h, and the light fraction of catalytically cracked gasoline including C5-C7 olefins and thiophene and methane is produced at 125g / h from the side line of the primary fractionation tower at a temperature of 95°C. The middle distillate of catalytic cracking gasoline of the sulfide of alkylthiophene of base thiophene, and then produce the heavy fraction of catalytic cracking gasoline ...

Embodiment 2

[0028] Feed catalytic cracked gasoline with a sulfur content of 346ppm into the preprocessor equipped with ion exchange resin at a flow rate of 300g / h, and remove basic nitrogen compounds in catalytic cracked gasoline at an operating pressure of 0.15MPa and a temperature of 25°C The catalytically cracked gasoline that removes basic nitrogen compounds enters the batch distillation tower for separation, the operating pressure of the primary fractionation tower is 0.1Pa, and at the top temperature of the primary fractionation tower is 25 ~ 50 ° C, the output includes C4 ~ C5 olefins. The light fraction of cracked gasoline, when the initial fractionation tower top temperature is 50-115 ° C, the middle distillate of catalytic cracked gasoline including C5-C7 olefins and sulfides of alkylthiophenes including thiophene and methylthiophene is produced, and then in the initial fractionation The tower bottom output includes the heavy fraction of catalytic cracking gasoline of C2~C7 alkyl...

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Abstract

The invention relates to an alkylated desulfurizing method of the hydrocarbon regrouped cat-cracking gasoline, comprising a pre-processor, a first fractionator, a single cut fraction alkylated reactor, a double cut fraction alkylated reactor and a second cut fraction alkylated reactor which are all used to desulfurizing the cat-cracking gasoline. The alkylated desulfurizing method adopts the following steps: dividing the cat-cracking gasoline into three cut fraction by the first fractionator, adding the mixture of low-boiling cut fraction, middle-boiling cut fraction and high-boiling cut fraction into two alkylated reactors, carrying out alkylated reaction under the acid catalyst, mixing the products of the two alkylated reactors and a certain amount of diesel fuel to put in the second cutfraction alkylated reactor to distill, which makes the sulphide in the diesel fuel cut fraction transfer to the diesel fuel cut fraction, picking the sweet gasoline from the top of the fractionator and obtaining the sulfur-diesel fuel from the tower bottom. The alkylated desulfurizing method of the hydrocarbon regrouped cat-cracking gasoline has the advantages of small investment, simple operation, smooth condition, good decarbolizing result and high gasoline octane number.

Description

[0001] The invention relates to a hydrocarbon reorganization alkylation desulfurization method for catalytic cracking gasoline, which belongs to the gasoline desulfurization technology in the field of petroleum processing. Background technique [0002] At present, catalytic cracking (FCC) gasoline accounts for more than 75% of the finished gasoline in my country, and more than 90% of the sulfur impurities in the finished gasoline come from FCC gasoline. Therefore, the production of clean gasoline products requires a substantial reduction in the sulfur content of FCC gasoline. Among the sulfides contained in FCC gasoline, mercaptans and thioethers are less, and thiapanes account for more than 80% of the total sulfides. Hydrodesulfurization (H-DS) is a widely used FCC gasoline desulfurization technology at present. It can remove many types of sulfides and high reaction conversion rate, but the olefins in the light fraction are easily saturated at the same time, making gasoline o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G57/00C10G25/02C10G7/02C10G35/04
Inventor 李永红
Owner TIANJIN UNIV