Dewaxing catalyst containing compound molecule sieve and preparation method thereof

A composite molecular sieve and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low yield of lubricating oil base oil, etc., and achieve the effect of high yield and low freezing point

Active Publication Date: 2006-07-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new activity and selectivity for the existing hydrocarbon isomerization catalyst containing macroporous molecular sieves, when used for the dewaxing of lubricating oil distillate oil, the yield of lubricating oil base oil is low Higher dewaxing catalyst containing composite molecular sieve and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example illustrates the catalyst provided by the invention and its preparation method.

[0030] SAPO-11 molecular sieves were synthesized according to the method of example 16 in the patent U.S. Pat. No. 4,440,871. Specifically: Weigh 420 g of 85 wt% phosphoric acid, add 880 g of distilled water, 276 g of pseudoboehmite (74.2 wt% alumina content, 25.8 wt% water content), stir evenly to obtain mixture S1. Weigh 1298.4 grams of 40% by weight aqueous solution of hydroxytetra-n-butylamine and 52 grams of fumed silica gel (92.8% by weight of silicon oxide, 7.2% by weight of water), and stir evenly to obtain a mixture S2. The mixtures S1 and S2 were mixed, and 204 g of di-n-propylamine were added with stirring to obtain a reaction mixture. The reaction mixture was packed into a polytetrafluoroethylene-sealed reactor, crystallized at 200°C for 24 hours, filtered and washed to neutral, and dried at 120°C to obtain SAPO-11 molecular sieves (SAPO-11 net content 85.0% by wei...

Embodiment 2

[0034] This example illustrates the catalyst provided by the invention and its preparation method.

[0035] Beta zeolite was prepared according to CN 1108231A method. On the basis of CN 1108231A example 2 synthetic beta zeolite, add polyether oil (commercially available commodity, trade name is 50HB-260, U.S. Union Carbide Company, molecular weight 1000-1200), the molar ratio of each component is SiO 2 / Al 2 o 3 =30,Na 2 O / SiO 2 =0.065, TEAOH / SiO 2 =0.10,H 2 O / SiO 2 =6.5, polyether oil / SiO 2 (% by weight) = 0.8; the resulting mixture was crystallized in an autoclave at 120°C for 24 hours, then heated to 140°C for 40 hours, and the solid product was isolated after the reaction, washed, and dried at 110°C to obtain zeolite beta. The grain size of the product is 70-80 nanometers. The zeolite was roasted at 550°C for 3 hours, and after cooling to room temperature, 20 g was impregnated with 100 ml of cyclohexane solution containing 1.7 g of orthosilicate for 10 hours, filt...

Embodiment 3

[0038] This example illustrates the catalyst provided by the invention and its preparation method.

[0039] This example uses the same raw materials and methods as in Example 1 to prepare catalyst C3, except that the content of SAPO-11 in catalyst C3 is 65% by weight, the content of zeolite beta is 15% by weight, and the alumina matrix is ​​20% by weight. -11:β=69.50:19.45.

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Abstract

The dewaxing catalyst contains composite molecular sieves by weight ratio as 80-99:1-20; wherein, one has one-dimensional hollow structure, and another has macropore structure and non-framework silicon of 1-20wt% taken the oxide and based on the molecular sieve.

Description

technical field [0001] The invention relates to a dewaxing catalyst and a preparation method thereof, in particular to a dewaxing catalyst containing a composite molecular sieve and a preparation method thereof. Background technique [0002] The low temperature flow properties of waxy petroleum distillates can be effectively changed by selective wax molecular cracking and / or isomerization dewaxing. There are many catalysts that can be used for the selective dewaxing of waxy petroleum distillate oil. Among them, the catalysts containing composite molecular sieves have improved performance compared with catalysts containing single molecular sieves due to the complementary and synergistic properties of different molecular sieves. [0003] US 4,575,416 discloses a method for catalytic dewaxing of lubricating oil distillates, comprising contacting feed oil with a dewaxing catalyst, said catalyst containing a zeolite molecular sieve with a restriction inde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/02B01J29/00
Inventor 孙霞康小洪李明丰黄卫国董维正聂红石亚华
Owner CHINA PETROLEUM & CHEM CORP
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