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Combined catalyst and method for producing biological aviation kerosene

A combination of catalysts and catalysts, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of mesopores without structure, reduce interaction, etc., to achieve increased yield, lower freezing point, better The effect of heterogeneous pour point depressing effect

Active Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The seed crystal selected in this invention is a microporous molecular sieve, which is added to the preparation system after silanization, and its hydrophobicity is used to increase its effect on the hydrophobic end of the surfactant micelle, thereby reducing the interaction between the two directing agents. However, the formed mesopores still do not have a regular structure, and whether the addition of seed crystals reduces the amount of templating agent has not been reported.

Method used

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  • Combined catalyst and method for producing biological aviation kerosene
  • Combined catalyst and method for producing biological aviation kerosene
  • Combined catalyst and method for producing biological aviation kerosene

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0083] (1) Preparation of mother liquor after crystallization

[0084] Take 38.5mL containing 40% by weight of SiO 2 Silica sol, 1.48 grams of analytically pure sodium aluminate, and 17.5 mL of tetraethylammonium hydroxide (40% by weight) solution are ready for use. Mix tetraethylammonium hydroxide, sodium aluminate and 37 grams of deionized water, then add silica sol, stir for 1 hour, then transfer to a reaction kettle, and crystallize at 160°C for 132 hours.

[0085] (2) Preparation of filter cake

[0086] Filter the mother liquor after crystallization prepared in the operation (1), and continue suction filtration for 5 minutes when there is no filtrate on the filter cake, and obtain the filter cake F-1, which has a dry basis content of 11.2 % by weight and a silica / alumina molar ratio of 40.6.

[0087] (3) Preparation of molecular sieve precursor

[0088] The filter cake F-1 was raised from room temperature to 450° C. at a heating rate of 25° C. / min, and kept at a const...

preparation example 2

[0098] (1) Preparation of mother liquor after crystallization

[0099] Take 6.05mL of white carbon black, 0.51g of analytically pure aluminum sec-butoxide, and 18.4mL of tetraethylammonium hydroxide (40% by weight) solution for use. Mix 15 grams of deionized water with tetraethylammonium hydroxide, aluminum sec-butoxide and 37 grams of deionized water, then add white carbon black, stir for 1 hour, then transfer to a reaction kettle, and crystallize at 140°C for 120 hours.

[0100] (2) Preparation of filter cake

[0101] Filter the crystallized mother liquor prepared in step (1), count as there is no filtrate on the filter cake, continue suction filtration for 5 minutes, obtain filter cake F-2, and the dry basis content of the filter cake F-2 is 11.2 % by weight and a silica / alumina molar ratio of 40.6.

[0102] (3) Preparation of molecular sieve precursor

[0103] The filter cake F-2 was raised from room temperature to 450° C. at a heating rate of 25° C. / minute, and kept at...

Embodiment 1

[0112] Such as figure 1 As shown, 50 g of catalyst Cat-1 and 150 g of catalyst Cat-2 were respectively installed in the first reactor 1 and the second reactor 2 of the high-pressure hydrogenation reaction device. The bio-jet fuel (parameters shown in Table 2) was injected into the reactor from top to bottom for reaction, and the reaction was carried out according to the two conditions shown in Table 3 below. After the reaction is finished, the product is distilled to remove light components less than 180°C and heavy components greater than 280°C. The freezing point analysis and yield calculation of the target product were performed, and the results are shown in Table 4. Yield is defined as: Yield=weight of 180-280°C components in product / weight of feed.

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Abstract

The invention relates to a combined catalyst and a method for producing biological aviation kerosene, wherein the combined catalyst comprises a first catalyst and a second catalyst, the first catalystcontains a twelve-membered ring molecular sieve M1, the second catalyst contains a twelve-membered ring molecular sieve M2, the first catalyst and the second catalyst are respectively filled in different reactors, and the twelve-membered ring molecular sieve M1 and / or the twelve-membered ring molecular sieve M2 has the following characteristics that a molar ratio of silicon oxide to aluminum oxide is 120-300, the catalyst contains a mesoporous structure, a closed hysteresis loop appears at a low-temperature nitrogen adsorption-desorption curve P / P0 of 0.4-0.99, and the initial position of theclosed hysteresis loop is P / P0 of 0.4-0.7. According to the invention, with the application of the method to produce biological aviation kerosene, the good pour point depressing effect can be obtained, and the yield is high.

Description

technical field [0001] The invention relates to the field of hydrogenation treatment of bio-jet kerosene, in particular to a method for producing combined catalyst and bio-jet kerosene. Background technique [0002] Molecular sieve material has high acidity and high specific surface area, and is an excellent acidic catalyst. At the same time, molecular sieve materials have strong chemical stability and hydrothermal stability, and are difficult to be destroyed by corrosion and dissolution of reactants. Compared with commonly used homogeneous catalysts, molecular sieve material catalysts can be directly reused without separation, and will not pollute the environment and products. The specific surface area and other pore structure parameters of molecular sieve materials have an important influence on the catalytic performance of molecular sieves. Therefore, the preparation of molecular sieves with special channels is an important research direction in the chemical industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/00B01J29/74
CPCC10G45/00B01J29/7469B01J29/7415
Inventor 毕云飞夏国富黄卫国郭庆洲方文秀
Owner CHINA PETROLEUM & CHEM CORP
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