Preparation method of hydrodearomatization catalyst, hydrodearomatization catalyst and application of hydrodearomatization catalyst

A technology for hydrodearomatization and catalysts, which is applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of increased catalyst costs, small catalyst specific surface area and pore volume, and large loss of precious metals. Improve the effective utilization rate, improve the dearomatization ability, and improve the effect of anti-carbon deposition ability

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific surface area and pore volume of the catalyst obtained by this method are small, the acid center is partially covered, and the total acid content and acidity distribution cannot meet the requirements in the reaction process, and further improvement is needed
Secondly, in this method, since the precious metal is sprayed on the mixture, and then the catalyst is prepared through kneading, extruding, roasting and other processes, the loss of the precious metal in this process is large, the cost of the catalyst is significantly increased, and the preparation route is poor in operability, so it is not suitable for mass production
[0006] CN101745383A discloses a preparation method of a deep hydrogenation dearomatization catalyst, the main active component is Pt, the auxiliary agent is Pd, and the carrier is an amorphous silicon aluminum carrier, SiO 2 The content is 40% to 60% of the weight of the carrier. The carrier acidity of the catalyst prepared by this method is low, the metal dispersion is poor, the catalyst activity is low, and the effect of dearomatization is poor.

Method used

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  • Preparation method of hydrodearomatization catalyst, hydrodearomatization catalyst and application of hydrodearomatization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] (1) Preparation of A-S-1 molecular sieve:

[0077] (1) Preparation of amorphous silica-alumina dry glue A1 and slurry: sodium aluminate solution concentration 18gAl 2 o 3 / L, the concentration of sodium silicate solution is 95gSiO 2 / L, take 0.75L sodium aluminate solution and put it into the gel-forming tank, then add 0.35L sodium silicate solution, control the reaction temperature at 22°C, and feed CO with a concentration of 40v% 2 gas, CO 2 When the gas accounts for 50% of the total intake, add 0.50L sodium silicate solution while ventilating to control the pH value of the gel to 9.8, then ventilate and stabilize for 20 minutes, filter the slurry and wash it with 65°C deionized water until neutral. The filter cake was beaten with water at a solid-to-liquid volume ratio of 10:1, treated at 130°C and 3.0 MPa steam pressure for 2 hours, dried at 120°C for 6 hours, crushed and sieved to obtain the amorphous silica-alumina product A1. The prepared amorphous silica-alu...

Embodiment 2

[0082] (1) Preparation of A-S-2 molecular sieve:

[0083] (1) Preparation of amorphous silica-alumina dry glue A2 and slurry: concentration of sodium aluminate solution 23gAl 2 o 3 / L, the concentration of sodium silicate solution is 100gSiO 2 / L, take 0.78L sodium aluminate solution and put it into the gel-forming tank, then add 0.25L sodium silicate solution, control the reaction temperature at 26°C, and feed CO with a concentration of 40v% 2 gas, CO 2 When the gas accounts for 50% of the total intake, add 0.50L sodium silicate solution while ventilating to control the pH value of the gel to 9.2, then ventilate and stabilize for 20 minutes, filter the slurry and wash it with 65°C deionized water until neutral. The filter cake was beaten with water at a solid-to-liquid volume ratio of 10:1, treated at 120°C under 3.5MPa water vapor pressure for 2 hours, dried at 120°C for 6 hours, crushed and sieved to obtain the amorphous silica-alumina product A2. Mix the prepared amorp...

Embodiment 3

[0088] (1) Preparation of A-S-3 molecular sieve:

[0089] Others are the same as in Example 1, except that in step (1) when preparing amorphous silica-alumina dry gel A1, the pH value of the gel is controlled to be 11 to obtain amorphous silica-alumina product A3, and the prepared molecular sieve is A-S-3. The properties of A-S-3 are shown in Table 1. The XRD pattern of A-S-3 molecular sieve and figure 1 Similarly, the characteristic peaks of Al-SBA-15 molecular sieves are shown.

[0090] (2) Weigh tetraammine platinum acetate [Pt(NH 3 ) 4 (CH 3 COO) 2 ] solution and tetraammine palladium acetate [Pd(NH 3 ) 4 (CH 3 COO) 2] solution, the quality of the solution is calculated according to the final catalyst metal platinum and palladium content, and the solution taken by weighing is diluted to 100mL with deionized water to obtain solution A; 7 grams of ethylene glycol are weighed and diluted to 100mL with deionized water to obtain Solution B; Weigh 12g A-S-3 molecular s...

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Abstract

The invention discloses a preparation method of a hydrodearomatization catalyst, the hydrodearomatization catalyst and application of the hydrodearomatization catalyst. The preparation method of the hydrodearomatization catalyst comprises the following steps: (I) preparing an Al-SBA-15 molecular sieve, and then mixing the Al-SBA-15 molecular sieve with a modified Y molecular sieve, aluminum oxide and water to prepare slurry; (II) adding a solution containing active metal components and an aqueous solution of ethylene glycol into the slurry prepared in the step (I) to obtain a mixed slurry; (III) filtering, washing and drying the mixed slurry prepared in the step (II) to obtain a catalyst precursor; and (IV) crushing the catalyst precursor prepared in the step (III), mixing and kneading, forming, drying and roasting to obtain the hydrodearomatization catalyst. The hydrodearomatization catalyst prepared by the method has the characteristics of high hydrodearomatization activity, good selectivity, excellent product quality and the like. The hydrodearomatization catalyst is especially suitable for hydrodearomatization processes in which naphthenic oil with high heavy aromatics content is subjected to hydro-upgrading and isomerization and then is subjected to hydrorefining.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation dearomatization catalyst, which is particularly suitable for the preparation method of a hydrogenation dearomatization catalyst for supplementary refining of naphthenic oil with high aromatic content. Background technique [0002] Under aerobic conditions, high-grade lubricating oil, food-grade white oil and other hydrotreated oils are highly sensitive to sunlight and ultraviolet radiation. Exposure to sunlight and air for a certain period of time will cause the appearance and performance of the oil to be unstable. The color of the oil will deepen, and in severe cases, precipitation will occur. This type of oil requires low viscosity, high flash point and boiling point, and low volatility. Oil products with low aromatic content, non-corrosiveness, colorless and odorless, good thermal stability and oxidation stability, not easy to cause gelation, and good biological properties are more in...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J35/10C10G45/12
CPCB01J29/80C10G45/12B01J29/0325B01J29/126B01J2229/186C10G2300/201C10G2300/70C10G2300/1062B01J35/394B01J35/617B01J35/638B01J35/615B01J35/635B01J35/647Y02P20/52
Inventor 杜艳泽唐兆吉樊宏飞
Owner CHINA PETROLEUM & CHEM CORP
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