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A carried-type aluminium dihydrogen tripolyphosphate catalyst and a preparation method thereof

A technology of aluminum dihydrogen tripolyphosphate and catalyst, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of insignificant catalytic effect and insignificant improvement of catalytic effect, and achieve economic benefits. and social benefits, the reaction conditions are not high, and the effect of improving the specific surface area

Inactive Publication Date: 2013-10-02
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after years of research, we found that: when aluminum dihydrogen tripolyphosphate is used alone as a catalyst, the catalytic effect is not significant (the esterification rate for esterification reaction is only about 56%); while direct use of activated carbon, diatomaceous earth, etc. When the carrier is loaded with aluminum dihydrogen tripolyphosphate, the catalytic effect is not significantly improved (for esterification reaction, the esterification rate is about 62%)

Method used

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  • A carried-type aluminium dihydrogen tripolyphosphate catalyst and a preparation method thereof
  • A carried-type aluminium dihydrogen tripolyphosphate catalyst and a preparation method thereof
  • A carried-type aluminium dihydrogen tripolyphosphate catalyst and a preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] 1. Raw material composition and mass quantity:

[0045]5 grams of sublimated sulfur, 200 grams of diatomaceous earth, 200 grams of water, 34.5 grams of phosphoric acid, and 8 grams of aluminum hydroxide.

[0046] 2. Preparation method:

[0047] Take 5 grams of sublimated sulfur in a crucible and 200 grams of diatomite on a porcelain plate, put them into a muffle furnace at the same time, heat to 500 ° C, keep for 3 hours, take out after cooling and grind to obtain sulfur-loaded diatomite.

[0048] Pour 34.5 grams of phosphoric acid and 20 grams of water into a beaker, heat on an electric furnace, stir, and slowly add 8 grams of aluminum hydroxide when the temperature of the solution is 70-80°C, continue heating and stirring, and control the temperature of the solution at 100-110°C , stop the reaction until the solution becomes transparent, and cool down to obtain the phosphorus-aluminum intermediate.

[0049] Add 60 grams of water to the above-mentioned cooled phospho...

Embodiment 2

[0051] 1. Raw material composition and mass quantity:

[0052] 10 grams of sublimated sulfur, 280 grams of activated clay, 280 grams of water, 38 grams of phosphoric acid, and 8 grams of aluminum hydroxide.

[0053] 2. Preparation method:

[0054] Take 10 grams of sublimated sulfur in a crucible and 280 grams of activated clay on a porcelain plate, put it into a muffle furnace at the same time, heat it to 700°C, keep it for 2 hours, take it out after cooling, and grind it to obtain sulfur-loaded activated clay.

[0055] Pour 38 grams of phosphoric acid and 30 grams of water into a beaker, place it on an electric furnace, stir, and slowly add 8 grams of aluminum hydroxide when the temperature of the solution is 70-80 ° C, continue heating and stirring, and control the temperature of the solution at 100-110 ° C, Stop the reaction until the solution becomes transparent, and cool to obtain the acid aluminum intermediate.

[0056] Add 100 grams of water to the above-mentioned coo...

Embodiment 3

[0058] 1. Raw material composition and mass quantity:

[0059] 20 grams of pyrite, 400 grams of activated carbon, 170 grams of water, 32 grams of phosphoric acid, and 5.2 grams of activated alumina.

[0060] 2. Preparation method:

[0061] Take 20 grams of pyrite in a crucible and 400 grams of activated carbon on a porcelain plate, put it into a muffle furnace at the same time, heat it to 800 ° C, keep it for 4 hours, take it out after cooling, and grind it to obtain sulfur-loaded activated carbon.

[0062] Pour 32 grams of phosphoric acid and 20 grams of distilled water into a beaker, place it on an electric furnace, stir, and slowly add 5.2 grams of activated alumina when the temperature of the solution is 70-80 ° C, continue heating and stirring, and control the temperature of the solution at 100-110 ° C, Stop the reaction until the solution becomes transparent, and cool to obtain the phosphorus-aluminum intermediate.

[0063] Add 50 grams of water to the above-mentioned ...

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Abstract

The invention discloses a carried-type aluminium dihydrogen tripolyphosphate catalyst and a preparation method thereof. Raw materials, for preparing the catalyst, comprise 0.5-20 g of a sulphur-containing substance; 20-400 g of a carrier, 23-46 g of phosphoric acid having a concentration of 85%, 8.0 g of aluminium hydroxide having a concentration of 98% or 5.2 g of active aluminum oxide, and 75-400 g of water. A sulfur-carried catalyst-carrier is prepared by gas-solid adsorption. Then after physical and chemical treatment under certain conditions, an aluminum phosphorus intermediate is reacted to produce aluminium dihydrogen tripolyphosphate, and the aluminium dihydrogen tripolyphosphate is carried by the sulfur-carried catalyst-carrier to produce the carried-type aluminium dihydrogen tripolyphosphate catalyst. The sulfur-carried catalyst-carrier after surface treatment has high specific surface and high carrying capacity, thereby increasing the specific surface and reducing acid strength of the aluminium dihydrogen tripolyphosphate, and improving the catalytic efficiency of the aluminium dihydrogen tripolyphosphate in organic reactions. The catalyst provided by the invention has advantages of low preparation reaction condition requirements, simple technology, easy operation, easy industrial production, low production cost, and good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of organic reaction catalyst preparation, and relates to a method for preparing a phosphate catalyst, in particular to a supported aluminum dihydrogen tripolyphosphate catalyst and a preparation method thereof. Background technique [0002] At present, in industrial production, most reactions such as esterification, acetalization, and acylation of alcohols and acids still use sulfuric acid as a catalyst, because sulfuric acid has high catalytic activity and is cheap and easy to obtain. However, the use of sulfuric acid as a catalyst also has obvious disadvantages, that is, serious corrosion to equipment, many side reactions (such as oxidation, dehydration and etherification of alcohol, etc.), and sulfuric acid needs to be neutralized and washed before it can be removed after the reaction. The production process is long, the product loss is large, and a large amount of waste water is generated to pollute the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C07C69/704C07C67/08C07D317/12C07C69/157
Inventor 袁爱群黄增尉王璟梁慧马少妹
Owner GUANGXI UNIV FOR NATITIES
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