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A kind of recovery processing method of sodium tetrachloroaluminate catalyst composition

A sodium tetrachloroaluminate, recovery and treatment technology, applied in the direction of phosphorus compounds, alkali metal chlorides, chemical instruments and methods, etc., can solve the problems of high treatment cost, long process, complicated treatment process, etc., and achieve the goal of avoiding organic impurities The effect of bringing in, large market capacity, and good economic benefits

Active Publication Date: 2022-03-29
JIANGSU YOUTH CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of some product properties, water cannot be used as a dissolving agent. In general, sodium chloride is widely used as a cheap dissolving agent, but a large amount of sodium tetrachloroaluminate catalyst composition needs to be processed after the product is extracted. If this part of the sodium tetrachloroaluminate catalyst composition cannot be effectively handled, it will directly affect the normal production and production cost of the product
[0003] There are many literature reports on the treatment method of sodium tetrachloroaluminate catalyst composition, such as direct sale as a by-product for heat storage medium and electrolyte; using a decomposing agent to separate and recover anhydrous aluminum trichloride and sodium chloride for recovery Apply mechanically; add phosphoric acid or phosphate to prepare aluminum tripolyphosphate; add water and alkali to neutralize to prepare polyaluminum chloride; Disadvantages such as residues of intermediate products, low quality of by-products, and high processing costs

Method used

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  • A kind of recovery processing method of sodium tetrachloroaluminate catalyst composition

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Experimental program
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Effect test

Embodiment 1

[0031] A kind of recycling treatment method of sodium tetrachloroaluminate catalyst composition, comprises the following steps:

[0032] (1) Add 1200ml of water into the glass bottle, add 300g of sodium tetrachloroaluminate into the water under vigorous stirring, the water temperature rises to 95°C, continue the reaction for 0.5 hours after the addition, and cool down after the reaction;

[0033] (2) The temperature was controlled at 40°C, 6g of 27.5% hydrogen peroxide was added dropwise, and the reaction was carried out at 40-50°C for 4 hours to obtain 1505.2g of the reaction-finished product;

[0034] (3) Distill the product at the end of the reaction, distill at -0.09MPa at 60°C for 10h for dehydration, remove 500g of water, cool down to 20°C at the end of the distillation, suction filter and wash after 3 hours of crystallization to obtain 67g of sodium chloride wet base, a filtrate 938.2g;

[0035] Distill 938.2g of filtrate once, distill at -0.09MPa at 60°C for 4h to deh...

Embodiment 2

[0041] A kind of recycling treatment method of sodium tetrachloroaluminate catalyst composition, comprises the following steps:

[0042] (1) Add 1200ml of water into the glass bottle, add 300g of sodium tetrachloroaluminate into the water under vigorous stirring, the water temperature rises to 95°C, continue the reaction for 0.5 hours after the addition, and cool down after the reaction;

[0043] (2) The temperature is controlled at 30°C, 18.6g of ozone with a concentration of 10% is introduced, and the reaction is carried out at 20-35°C for 6 hours to obtain 1500g of the reaction-finished product;

[0044] (3) Distill the product at the end of the reaction, distill at -0.09MPa at 60°C for 10h for dehydration, remove 500g of water, cool down to 20°C at the end of the distillation, suction filter and wash after 3 hours of crystallization to obtain 67g of sodium chloride wet base, a filtrate 933g;

[0045] Distill 933g of filtrate once, distill at -0.09MPa at 60°C for 4h to deh...

Embodiment 3

[0051] A kind of recycling treatment method of sodium tetrachloroaluminate catalyst composition, comprises the following steps:

[0052] (1) Add 1200ml of water into the glass bottle, add 300g of sodium tetrachloroaluminate into the water under vigorous stirring, the water temperature rises to 95°C, continue the reaction for 0.5 hours after the addition, and cool down after the reaction;

[0053] (2) The temperature is controlled at 40°C, 18.6g of ozone with a concentration of 10% is introduced, and the reaction is carried out at 20-35°C for 6 hours to obtain 1500g of the reaction-finished product;

[0054] (3) Distill the product at the end of the reaction, distill at -0.09MPa at 60°C for 10h for dehydration, remove 500g of water, cool down to 20°C at the end of the distillation, suction filter and wash after 3 hours of crystallization to obtain 67g of sodium chloride wet base, a filtrate 933g;

[0055] Distill 933g of filtrate once, distill at -0.09MPa at 60°C for 4h to deh...

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Abstract

The invention discloses a method for recovering and treating a sodium tetrachloroaluminate catalyst composition. The sodium tetrachloroaluminate is added into water, and the temperature rises to react to generate aluminum trichloride and sodium chloride; the aluminum trichloride, sodium chloride The mixture is controlled at a certain temperature, and an oxidizing agent is added for oxidation treatment; after the treatment, dehydration, crystallization, filtration, washing and separation are carried out to obtain aluminum trichloride and sodium chloride; the obtained aluminum trichloride is used to prepare polyaluminum chloride, The obtained sodium chloride is used to prepare anhydrous sodium chloride. In the present invention, the by-product sodium tetrachloroaluminate can be separated into sodium chloride and aluminum trichloride by hydrolysis, and there is no need to add other organic dissolving agents during the treatment process, thereby avoiding the introduction of organic impurities; the present invention obtains The products such as polyaluminum chloride, sodium chloride, and aluminum tripolyphosphate have a large market capacity, are easy to sell, and can also produce good economic benefits.

Description

technical field [0001] The invention relates to a recovery and treatment method of a sodium tetrachloroaluminate catalyst composition, in particular to the process of separation, purification and utilization of the sodium tetrachloroaluminate catalyst composition, and belongs to the field of green chemical industry. Background technique [0002] The Friedel-Crafts reaction is a class of classic reactions with many applications. In the synthesis process, in the presence of Lewis acids such as anhydrous aluminum trichloride, aromatic hydrocarbons, phosphorus trichloride and haloalkanes interact, and electrophilic substitution occurs on the aromatic ring or phosphorus. Reaction, generating alkyl aromatics or alkyl phosphine. Among them, AlCl3 is used as a catalyst in the reaction process. It first forms a carbocation with an acyl group or an alkyl group, and then undergoes a subsequent electrophilic substitution reaction. The general use amount is 1 to 2 times the molar equival...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/40C01D3/04C01F7/56
CPCC01B25/40C01D3/04C01F7/56
Inventor 何红军汪国庆熊苏义刘珂蔡靖
Owner JIANGSU YOUTH CHEM
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