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Combined catalyst and method for producing white oil

A combination catalyst and catalyst technology, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of reducing interaction, mesopores without structure, etc., and achieve good aromatics saturation effect

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

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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 white oil
  • Combined catalyst and method for producing white oil
  • Combined catalyst and method for producing white oil

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preparation example Construction

[0065]In the present invention, the mother liquor after crystallization can be prepared according to conventional methods in the art, for example, when the ten-membered ring molecular sieve is ZSM-22 molecular sieve, the preparation method of the mother liquor after crystallization can refer to document O. Muraza et al., Microporous and Mesoporous Materials 206(2015) 136–143. When the ten-ring silica-alumina molecular sieve is ZSM-48 molecular sieve, the preparation method of the crystallized mother liquor can refer to the literature P.Me'riaudeau et al / Journalof Catalysis, 1999 (185), 435-444, or refer to the U.S. Patent Application US5961951. In one embodiment, the preparation process of the crystallized mother liquor includes: preparing a silicon-containing solution, an aluminum-containing solution, and an alkaline liquid, mixing the above-mentioned liquids to form a gel, and then performing crystallization at a certain temperature.

[0066] In the combined catalyst of the...

preparation example 1

[0085] (1) Preparation of mother liquor after crystallization

[0086] Take 36.3 grams of SiO containing 40% by weight 2 silica sol, 1.77 g of analytically pure Al 2 (SO 4 ) 3 18H 2 O, 3.94 grams of analytically pure KOH and 8.44 grams of hexamethylenediamine are ready for use. Hexamethylenediamine was mixed with silica sol, KOH and Al 2 (SO 4 ) 3 18H 2 O and 89.4 grams of deionized water were mixed, and then the two solutions were mixed, stirred for 1 hour, then transferred to a reaction kettle, and crystallized at 160° C. for 72 hours.

[0087] (2) Preparation of filter cake

[0088] 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 60.

[0089] (3) Preparation of molecular sieve precursor

[0090] The filter cake F-1 was raised ...

preparation example 2

[0100] (1) Preparation of mother liquor after crystallization

[0101] Take 38.5mL containing 40% by weight of SiO 2Silica sol, 1.48 grams of analytically pure sodium aluminate, and 17.5 mL of tetraethylammonium hydroxide (content is 40% by weight) 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.

[0102] (2) Preparation of filter cake

[0103] 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 60.

[0104] (3) Preparation of molecular sieve precursor

[0105] The filter cake F-2 was raised from room temperature to 450° C. at a heating rate of 25° C. / minute, and kept at a constant ...

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Abstract

The invention relates to a combined catalyst and a method for producing white oil, wherein the combined catalyst comprises a first catalyst and a second catalyst, the first catalyst contains a ten-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 theten-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 the closed hysteresis loop is P / P0 of 0.4-0.7. According to the invention, with the application of the method to produce white oil, the good aromatic hydrocarbon saturation effect can be obtained.

Description

technical field [0001] The invention relates to the field of white oil hydrotreating, in particular to a method for combining a catalyst and white oil production. 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. [0003] CN104353484A di...

Claims

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Application Information

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IPC IPC(8): B01J29/44C10G65/02
CPCB01J29/44C10G65/02C10G2300/70
Inventor 毕云飞夏国富郭庆洲方文秀李洪辉
Owner CHINA PETROLEUM & CHEM CORP
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