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Hydrated alumina with structure of similar to thin diaspore of containing additive

A technology of hydrated alumina and pseudo-boehmite, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc. It can solve the problems that the catalyst's heavy oil cracking performance and light oil anti-coking ability need to be improved. , to achieve the effect of low coke and high conversion capacity of heavy oil

Active Publication Date: 2007-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

But when these homogeneously dispersed hydrated alumina additives prepared by the co-precipitation method are used to prepare catalysts such as catalytic cracking, the heavy oil cracking performance of the catalyst, the yield of light oil (including gasoline and diesel oil) and the ability to resist coking are still to be determined. improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The additive-containing hydrated alumina provided by the present invention and its preparation are illustrated.

[0025] (1), with 1020 grams of pseudo-boehmite (produced by Shandong Aluminum Plant, the alumina content is 60%), 3600 grams of deionized water and 61 grams (by weight, the weight ratio of acid to alumina is 0.1) hydrochloric acid (concentration 36%, produced by Beijing Chemical Plant, analytically pure) mixed under stirring;

[0026] (2), aging the mixed slurry obtained in step (1) at 70° C. for 2 hours;

[0027] (3), the product that step (2) obtains and 110ml phosphoric acid (produced by Beijing Chemical Plant, concentration 85%, analytically pure) and containing magnesium chloride hexahydrate (produced by Beijing Shuanghuan Reagent Factory, analytically pure) aqueous solution 252 grams (wherein hexahydrate Magnesium chloride 132 grams) mixes, obtains the hydrated alumina C-1 gram that contains phosphorus and magnesium and has pseudo-boehmite structure, ...

Embodiment 2

[0029] The additive-containing hydrated alumina provided by the present invention and its preparation are illustrated.

[0030] (1), 1020 grams of pseudo-boehmite (produced by Shanxi Aluminum Plant, with an alumina content of 60%), 3600 grams of deionized water and 61 grams (by weight, and calculating the weight ratio of acid to alumina to be 0.1 ) hydrochloric acid (concentration 36%, produced by Beijing Chemical Plant, analytically pure) mixed under stirring;

[0031] (2), aging the mixed slurry obtained in step (1) at 50° C. for 4 hours;

[0032] (3), the product obtained in step (2) is mixed with diboron trioxide (produced by Beijing Chemical Reagent Company, analytically pure) and water mixed solution 120 grams (wherein 56 grams of boron trioxide);

[0033] (4) Dry the product obtained in step (3) in an oven at 120°C for 6 hours to obtain manganese-containing alumina hydrate C-2 with a pseudo-boehmite structure, and its composition after roasting is listed in Table 1 mi...

Embodiment 3

[0035] The additive-containing hydrated alumina provided by the present invention and its preparation are illustrated.

[0036] (1), with 1020 grams of pseudo-boehmite (produced by Shandong Aluminum Plant, the alumina content is 60%), 3600 grams of deionized water and 121 grams (by weight, the weight ratio of acid to alumina is 0.2) hydrochloric acid (concentration 36%, produced by Beijing Chemical Plant, analytically pure) mixed under stirring;

[0037] (2), aging the mixed slurry obtained in step (1) at 80° C. for 1 hour;

[0038] (3), the product that step (2) obtains is mixed with magnesium chloride hexahydrate (produced by Beijing Shuanghuan Reagent Factory, analytically pure) aqueous solution 252 grams (wherein 132 grams of magnesium chloride hexahydrate) and silica sol (produced by Beijing Chemical Plant, silicon oxide content 16%,) 226 grams of mixing to obtain silicon and magnesium-containing alumina hydrate C-3 with a pseudo-boehmite structure, and its composition a...

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Abstract

A hydrated alumina containing additive (0.5-40 Wt %) and with alpha-AlO (OH) structure for preparing the catalyst used for catalytic cracking reaction. Said additive is chosen from RE metal, La-family metal, Si, Ga, B and P. Its preparing process includes such steps as mixing alpha-AlO (OH) with H2O and acid while stirring, ageing, and mixing with additive.

Description

technical field [0001] The present invention relates to a hydrated alumina, more particularly to a hydrated alumina containing additives and having a pseudo-boehmite structure. Background technique [0002] Alumina, especially γ-alumina, is often used as a matrix material for the preparation of catalysts because of its good pore structure, specific surface area and thermal stability. The precursor of alumina is hydrated alumina, such as pseudoboehmite (or quasi-crystalline boehmite). By modifying hydrated alumina, people can adjust the properties of alumina to meet certain requirements. some specific needs. [0003] For example, pseudo-boehmite containing lanthanide metal ions can be prepared by hydrolyzing isopropanyl aluminum co-precipitated with lanthanides. The lanthanide metal ions present in pseudo-boehmite can delay high-temperature roasting When the transformation of γ-alumina to α-alumina phase improves the thermal stability of γ-alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J37/00
Inventor 田辉平张蔚琳张剑秋陈振宇许明德达志坚龙军
Owner CHINA PETROLEUM & CHEM CORP
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