Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of long-life hydrogenation treatment catalyst

A hydrogenation treatment and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of easy pollution, metal deposition, increased cost, etc., and improve desulfurization and denitrification activity , The preparation process is simple, the effect of prolonging the life

Active Publication Date: 2016-01-20
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN93109141.1 pointed out that when the solution used contains ammonia solution of molybdenum and cobalt (nickel) at the same time, the impregnating solution is alkaline. If it is to be impregnated into a catalyst at one time, it needs to be formulated with a high concentration of molybdenum-cobalt (nickel)-ammonia solution, which is unstable and makes impregnation difficult
[0005] Hydrotreating catalysts mostly use γ-Al 2 o 3 As a carrier, its isoelectric point is 7-9, and the pH value of the commonly used Mo, Ni(Co), and P impregnation solutions is mostly <2, which is much lower than the isoelectric point of the carrier, which makes the active components in the impregnation solution and If the carrier interaction is too strong, it will have a significant impact on the activity of the catalyst, and if the pH value is too small, the specific surface area of ​​the carrier will be lost during the impregnation process.
However, if the pH value of the acidic impregnation solution is too high, metals will be deposited on the surface of the carrier during impregnation, and the active components in the catalyst will not be uniformly dispersed, which will affect the performance of the catalyst.
[0006] At present, hydrotreating catalysts prepared by different methods do not solve the above shortcomings well, and the performance of hydrotreating catalysts (such as long-term operation under high activity conditions) can only be improved to a limited extent.
The above-mentioned hydrogenation catalyst needs to be subjected to normal vulcanization treatment before use, and the active metal is converted into a vulcanized state. The vulcanization process not only increases the cost, but also easily causes pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get the carrier Z1 in the comparative example, use the dimethylhydrazine NH that the mass concentration of preparing is 30% 2 N(CH 3 ) 2 The equal volume of the solution was impregnated with carrier Z for 12 hours, dried at 100 °C for 4 hours, and then 75 mL of active metal impregnation solution 1 (MoO 389.2g / 100ml, NiO 15.0g / 100ml, P 2.5g / 100ml) impregnated with equal volume, dried at 120°C for 4h, and then reductively activated in a hydrogen atmosphere. The reductive activation procedure was 5°C / min from room temperature Raise to 450°C at a rate of 2°C / min, from 450°C to 500°C, and keep the temperature at 500°C for 2 hours to prepare the catalyst C-1 of the present invention.

Embodiment 2

[0028] Get the carrier Z2 in the comparative example, use the dimethylhydrazine NH of 60% to prepare the quality 2 N(CH 3 ) 2 The equal volume of the solution was impregnated with carrier Z for 22 hours, dried at 100°C for 4 hours, and then 75 mL of active metal impregnating solution 2 (MoO 3 is 83.1g / 100ml, NiO is 15.6g / 100ml, P is 1.94g / 100ml) equal volume impregnation, dried at 120℃ for 4h, and then activated by hydrogen in a hydrogen atmosphere. To 350°C, the temperature was raised from 350°C to 500°C at a rate of 1°C / min, and kept at 500°C for 4 hours to prepare catalyst C-2.

Embodiment 3

[0030] Get the carrier Z3 in the comparative example, use the dimethylhydrazine NH that the weight concentration of preparing is 40% 2 N(CH 3 ) 2 The solution was impregnated with an equal volume of Z for 32 hours, dried at 100°C for 4 hours, and then 75 mL of active metal impregnating solution 3 (MoO 3 is 39.0g / 100ml, NiO is 6.5g / 100ml, P is 1.1g / 100ml) equal volume impregnation, dried at 120℃ for 4h, and then activated in hydrogen atmosphere, firstly at 8℃ / min from room temperature to 450°C, at a heating rate of 1°C / min, from 450°C to 650°C, and kept at 650°C for 4 hours to prepare catalyst C-3.

[0031] The main character of the catalyst prepared by above-mentioned comparative example and embodiment is shown in Table 1

[0032] Table 1

[0033] catalyst C-1 C-2 C-3 BC1 BC2 BC3 Specific surface area, m 2 / g 220 205 212 196 184 180 Total pore volume, ml / g 0.40 0.41 0.39 0.39 0.37 0.36 Average pore size, nm 8.1 8.0 8.1 8.0 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a hydrogenation catalyst with long service life. The method comprises the following processes: first dipping an alumina carrier or an alumina carrier containing an auxiliary agent with a solution containing hydrazine derivative and then drying; dipping with a routine active metal dipping solution and drying; and activating the materials with hydrogen to obtain the final hydrogenation catalyst after activation. The hydrazine derivative can be any hydrazine derivative, preferably dialkyl hydrazine and especially NH2N(CH3)2 and has a mass concentration of 20%-70%. The catalyst prepared by the method has slow deactivation rate and high activity stability, and does not require vulcanization treatment.

Description

technical field [0001] The invention relates to a preparation method of a long-life hydrotreating catalyst, in particular to a preparation method of a long-life heavy distillate oil hydrotreating catalyst. Background technique [0002] Most supported catalysts are prepared by impregnation method, such as various hydrogenation catalysts. When the hydrogenation catalyst is prepared by the impregnation method, the pH value of the impregnation solution has a great influence on the structure and dispersion of the active metal (such as Mo) on the surface of the catalyst and its interaction with the carrier (such as Al 2 o 3 ) interactions have a great influence. The increase of the pH value can reduce the loss of the specific surface area of ​​the carrier during the impregnation process and increase the specific surface area of ​​the catalyst. [0003] Generally speaking, there are two types of impregnation solutions for hydrogenation catalysts: one is the alkaline solution of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J37/02B01J37/18C10G45/08
Inventor 姜虹杨占林王继锋唐兆吉魏登凌温德荣
Owner CHINA PETROLEUM & CHEM CORP