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A kind of aluminum hydroxide and preparation method thereof

A technology of aluminum hydroxide and aluminum compound is applied in the field of aluminum hydroxide of residue hydrotreating catalyst carrier and its preparation field, which can solve the problems of uneven particle size distribution, low efficiency, low product purity and crystallinity, etc. The particle size distribution is uniform, the process is simple, and the effect of promoting the nucleation speed

Active Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of this method is a batch operation of the reactor, the purity and crystallinity of the produced product are not high, the particle size distribution is uneven and the efficiency is low

Method used

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  • A kind of aluminum hydroxide and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Al 2 o 3 Calculated as 30g / 100mL of NaAlO 2 Solution and concentration in Al 2 o 3 Calculated as 50g / 100mL of Al 2 (SO 4 ) 3 Add the solution into the respective component tanks, put each raw material tank and the first impingement flow microreactor into the oil bath and heat to 90°C, turn on the booster pumps of the two component tanks, and simultaneously put the NaAlO 2 solution and Al 2 (SO 4 ) 3 The solution enters the first impingement flow reactor through the atomizer, and the NaAlO 2 The flow rate of the solution is 15mL / min, adjust the pH value in the impingement flow reactor to 8.5, and carry out the neutralization and precipitation reaction, and the reaction mixture enters the second microreactor after staying in the first impingement flow microreactor for 1min; Microwave heating raises the reaction temperature of the second microreactor to 110 ° C, turns on the booster pump of the second microreactor, and Al 2 (SO 4 ) 3 The solution is injected i...

Embodiment 2

[0041] Al 2 o 3 Calculated as 50g / 100mL of NaAlO 2 Solution and concentration in Al 2 o 3 Calculated as 50g / 100mL of Al 2 (SO 4 ) 3 Add the solution into the respective component tanks, put each raw material tank and the first impingement flow microreactor into an oil bath and heat to 80°C, turn on the booster pumps of the two component tanks, and simultaneously put the NaAlO 2 solution and Al 2 (SO 4 ) 3 The solution enters the first impingement flow reactor through the atomizer, and the NaAlO 2 The flow rate of the solution is 15mL / min, the pH value in the impingement flow reactor is adjusted to 9.0, and the neutralization and precipitation reaction is carried out. The reaction mixture enters the second microreactor after staying in the first impingement flow microreactor for 1.5min; Adopt microwave heating to raise the reaction temperature of the second microreactor to 100 ℃, turn on the booster pump of the second microreactor, and Al 2 (SO 4 ) 3 Solution is in...

Embodiment 3

[0043] Al 2 o 3 Calculated as 35g / 100mL of NaAlO 2 Solution and concentration in Al 2 o 3 Calculated as 50g / 100mL of Al 2 (SO 4 ) 3 Add the solution into the respective component tanks, put each raw material tank and the first impingement flow microreactor into the oil bath and heat to 120°C, turn on the booster pumps of the two component tanks, and simultaneously put the NaAlO 2 solution and Al 2 (SO 4 ) 3 The solution enters the first impingement flow reactor through the atomizer, and the NaAlO 2 The flow velocity of the solution is 15mL / min, adjust the pH value 8.5 in the impingement flow reactor, and carry out the neutralization precipitation reaction, and the reaction mixture enters the second microreactor after staying in the first impingement flow microreactor for 2min; Microwave heating raises the reaction temperature of the second microreactor to 140 ° C, turns on the booster pump of the second microreactor, and Al 2 (SO 4 ) 3 The solution is injected int...

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Abstract

The invention discloses aluminum hydroxide and a preparation method thereof. A reaction system adopted by the preparation method of the aluminum hydroxide comprises N micro-reactors connected in series, wherein an impinging stream reactor is adopted as a first micro-reactor, an acidic material and an alkaline material enter the first micro-reactor to be subjected to a parallel flow reaction, and obtained products sequentially enter a second micro-reactor to an (N-1)th micro-reactor and are subjected to pH swing repeatedly; wherein the reaction temperature of the micro-reactor is 20-30 DEG C lower than that of the first micro-reactor when the pH swings towards the alkali side through while the reaction temperature is 20-30 DEG C higher than that of the first micro-reactor when the pH swingstowards the acid side; then the obtained reaction product mixed solution enters the Nth micro-reactor to be subjected to an aging reaction, and aluminum hydroxide is obtained after post-treatment. The aluminum hydroxide prepared by the method is high in crystallinity and uniform in grain size distribution, an amplification effect is eliminated, and the aluminum oxide obtained after roasting is uniform in pore size distribution and large in pore volume and specific surface area, and is very suitable for preparing mesoporous hydrogenation catalysts for hydrodesulfurization, denitrification andthe like of residual oil.

Description

technical field [0001] The invention relates to an aluminum hydroxide and a preparation method thereof, in particular to an aluminum hydroxide used as a catalyst carrier for residual oil hydrotreating and a preparation method thereof. Background technique [0002] In recent years, microreactors have attracted great academic and commercial interest from researchers in many fields. This interest arises from the following characteristics of microtechnology, including reduced size, increased productivity, scaling up of systems to any desired production capacity (ie "scaling up"), increased heat transfer and increased mass transfer. Some work involving microreactors is reviewed by Gavilidis et al. in "Technology And Applications Of Microengineered Reactors" Trans. IchemE, Vol. 80, Part A, pp. 3-30 (January 2002). Microreactor is a chemical reaction system with a unit reaction interface width of micron level. It is a microchemical technology that emerged in the 1990s. Since deMe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/34C01F7/30B01J21/04
Inventor 吕振辉薛冬隋宝宽彭冲季洪海彭绍忠佟佳
Owner CHINA PETROLEUM & CHEM CORP
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