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A method for producing low-sulfur gasoline

A technology for gasoline and gasoline fractions, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., and can solve problems such as loss of octane number of products

Active Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when traditional catalysts and processes are used for hydrodesulfurization, the large-scale hydrogenation of olefins will cause a large loss of octane number of the product

Method used

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  • A method for producing low-sulfur gasoline
  • A method for producing low-sulfur gasoline
  • A method for producing low-sulfur gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Take 100g of pseudo-boehmite powder produced by Changling Branch of the catalyst, add 4.0g methylcellulose, 3.0g sesame powder and 95mL deionized water, stir well and mix well, knead evenly through an extruder, and then extrude into shape. A wet molded product of aluminum hydroxide was obtained. The wet aluminum hydroxide molded product was placed in an oven at 150°C and dried for 12 hours. The shaped carrier Z1 was obtained, and the radial crushing strength, water absorption and δ value (strength loss rate) of Z1 were measured. The results are shown in Table 1.

Embodiment 2

[0065] Take 50g pseudo-boehmite powder produced by Changling Branch of Catalyst, 50g self-made amorphous aluminum hydroxide powder, add 2.0g methylcellulose, 3.0g hydroxyethyl methylcellulose and 95mL deionized water, stir and mix thoroughly Uniformity, after being uniformly kneaded by an extruder, extruding and forming a wet molded product of aluminum hydroxide. The wet aluminum hydroxide molded product was placed in an oven at 220°C and dried for 6 hours. The shaped carrier Z2 was obtained, and the radial crushing strength, water absorption and δ value of Z2 were measured. The results are shown in Table 1.

Embodiment 3

[0067] Take 60g pseudo-boehmite powder produced by Changling Branch of the catalyst, 40g aluminum hydroxide trihydrate, add 1.0g methylcellulose, 2.0g hydroxypropyl methylcellulose, 3.0g sesame powder and 95mL deionized water , Fully stir and mix uniformly. After being evenly kneaded by an extruding machine, extruded to obtain a wet molded product of aluminum hydroxide. The wet aluminum hydroxide molded product was placed in an oven at 80° C. and dried for 12 hours. The shaped carrier Z3 was obtained, and the radial crushing strength, water absorption and δ value of Z3 were measured. The results are shown in Table 1.

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Abstract

The invention relates to a low sulfur gasoline production method, which comprises that: (1) in the presence of hydrogen and a catalyst A, a gasoline raw material oil is subjected to a primary desulfurization reaction, and separation is performed to obtain hydrodesulfurized gasoline distillate oil, wherein the primary desulfurization reaction conditions comprise that: a reaction pressure is 0.8-3.2 MPa, a reaction temperature is 200-320 DEG C, a volume space velocity during material liquid feeding is 3-8 h<-1>, and a hydrogen / oil volume ratio is 200-600; and (2) in the presence of hydrogen or hydrogen-containing gas and a catalyst B, the hydrodesulfurized gasoline distillate oil is subjected to a secondary desulfurization reaction, and separation is performed to obtain low sulfur gasoline, wherein the secondary desulfurization reaction conditions comprise that: a reaction temperature is 100-350 DEG C, a pressure is 0.2-6 MPa, a mass space velocity during material liquid feeding is 1-12 h<-1>, a volume ratio of the hydrogen or the hydrogen-containing gas to the raw material oil is 2-200, the catalyst A and the catalyst B are selected from supported hydrorefining catalysts, and the carrier of at least one of the catalyst A and the catalyst B is a forming composition containing hydrated alumina. Compared with the gasoline in the prior art, the gasoline produced by using the production method of the present invention has characteristics of low sulfur content, low olefin saturation rate and good desulfurization selectivity.

Description

Technical field [0001] The invention relates to a method for producing low-sulfur gasoline. Background technique [0002] Air pollution is a serious environmental problem, and a large number of engine emissions are one of the important causes of air pollution. In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuels to reduce the emission of harmful substances. [0003] At present, 90% to 99% of the sulfur in my country's refined gasoline comes from FCC gasoline. Therefore, reducing the sulfur content of FCC gasoline is the key to reducing the sulfur content of finished gasoline. [0004] Using FCC feedstock hydrotreating pretreatment (pre-hydrogenation) or FCC gasoline hydrodesulfurization (post-hydrogenation) are two alternative technical solutions for reducing the sulfur content of FCC gasoline. Among them, the pretreatment of FCC feedstock can greatly reduce the sulfur content of F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04
Inventor 邱萍李明丰褚阳曾双亲毛俊义王奎朱玫习远兵聂红李大东
Owner CHINA PETROLEUM & CHEM CORP