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Diesel production from hydrogenation upgrading isomerizing pour-point reduction

A technology of isomerism decondensation and hydrogenation upgrading, which is applied in refining to change the structure and skeleton of hydrocarbons, etc. It can solve the problems of inability to comprehensively improve the performance index of diesel oil and effectively reduce the freezing point of diesel oil, so as to achieve the reduction of aromatics content and low cost , good economic benefits

Active Publication Date: 2005-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1156752A discloses a diesel oil upgrading process, using a hydrocracking catalyst, under the condition of controlling a certain amount of nitrogen, the aromatic hydrocarbons in the diesel oil undergo a ring-opening reaction, which can greatly increase the cetane number of the diesel oil, but cannot effectively reduce the diesel oil. Solidifying point
[0005] In summary, none of the existing technologies can comprehensively improve various performance indicators of diesel and simply produce high-quality clean diesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 227.1 g of amorphous silica-alumina (SiO 2 The content is 45w%, the pore volume is 0.75ml / g, and the specific surface area is 390m 2 / g), 18.8 grams of modified β molecular sieves, 65.8 grams of macroporous alumina (the pore volume is 1.0ml / g, and the specific surface area is 460m 2 / g) into the roller compactor, mixed for 30 minutes, then add 288.5 grams of binder (with a pore volume of 0.4ml / g and a specific surface area of ​​280m 2 / g of small-pore alumina 107.1g, HNO 3 Molar ratio to alumina is 0.3), rolling for 30 minutes, then add 60 ml of water, continue rolling until the paste can be extruded, extruded, and dried at 110°C for 6 hours. The dried strips were heated up to 580° C. and calcined for 4 hours to obtain the carrier. The carrier was impregnated with an impregnating solution containing tungsten and nickel at room temperature for 2 hours, dried at 120°C for 6 hours, and calcined at 480°C for 4 hours at programmed temperature to obtain catalyst A. The ph...

Embodiment 2

[0031] 252.8 grams of amorphous silicon aluminum (SiO 2 The content is 65w%, the pore volume is 0.58ml / g, and the specific surface area is 340m 2 / g), 9.4 grams of modified β molecular sieves, 41.1 grams of macroporous alumina (pore volume is 0.75ml / g, specific surface area is 360m 2 / g) put into the roller compactor and mix for 20 minutes, then add 323.1 grams of binder (with a pore volume of 0.45ml / g and a specific surface area of ​​300m 2 / g small pore alumina 120.0g, HPO 3 The molar ratio to alumina is 0.2), continue rolling for 40 minutes, then add 55 ml of water, roll until the paste can be extruded, extrude, and dry the extruded strips at 140°C for 3 hours. The drying strip was heated to 530° C. and calcined for 5 hours to obtain the carrier. The carrier was impregnated with an impregnation solution containing tungsten and nickel at room temperature for 4 hours, dried at 130°C for 3 hours, and then calcined at 460°C for 5 hours to obtain catalyst B. The physical and...

Embodiment 3

[0034] 201.4 g of amorphous silica-alumina (SiO 2 The content is 30w%, the pore volume is 0.89ml / g, and the specific surface area is 460m 2 / g), 31.3 grams of modified β molecular sieves, 82.8 grams of macroporous alumina (same as Example 1) were put into the roller compactor and mixed for 40 minutes, then added 265.4 grams of binding agent (same as Example 1), and continued Roll for 25 minutes, then add 30 milliliters of water, roll to extrude paste, extrude, and extrude at 130°C for 4 hours. The drying strip was heated up to 680° C. and calcined for 2.5 hours to obtain the carrier. The carrier was impregnated with an impregnation solution containing tungsten and nickel at room temperature for 8 hours, dried at 130°C for 4 hours, and calcined at 530°C for 3 hours to obtain catalyst C. The physical and chemical properties are listed in Table 1.

[0035] The properties of the modified β molecular sieve are: molecular sieve SiO 2 / Al 2 o 3 Weight ratio 85, specific surface 5...

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Abstract

Production of hydrogenated and pour-point reducing modified isomerization diesel oil is carried out by using fraction oil as raw material from one-stage or series process flow, passing fraction oil raw material and hydrogen gas into catalyst bed which consists of beta molecular sieve 1í½9wt%, and obtaining clean high-quality diesel product and naphtha product with low sulfur nitrogen and high arene content. The beta molecular sieve has small crystal grain, low acidity, high silica-alumina ratio and crystallinity. It achieves simple process, higher productivity and less impurities, and improves density and freezing point.

Description

technical field [0001] The invention relates to a method for producing diesel oil through hydrogenation modification, isomerization and pour point reduction, which uses a catalyst with strong isomerization function to produce low pour point diesel oil with distillate oil. Background technique [0002] The sustained development of the national economy has led to the rapid development of the automobile industry and the transportation industry, especially the faster growth of diesel vehicles, which has also brought about the problem of air pollution caused by vehicle exhaust emissions. In order to effectively control vehicle exhaust emissions and protect the ecological environment on which human beings depend, countries all over the world, especially developed countries, have continuously improved automobile engines and their exhaust gas treatment systems, and at the same time have put forward higher and higher requirements for the quality of diesel products. Requirements, the ...

Claims

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Application Information

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IPC IPC(8): C10G45/58
Inventor 关明华王凤来方向晨尹恩杰杜艳泽
Owner CHINA PETROLEUM & CHEM CORP
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