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Method for preparing polymeric aluminium chloride by acetic ester industrial residue

A technology of polyaluminum chloride and ethyl acetate, which is applied in the fields of aluminum chloride, aluminum halide, flocculation/precipitation water/sewage treatment, etc., to achieve the effect of quality improvement

Inactive Publication Date: 2008-03-05
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing polyaluminum chloride from ethyl acetate industrial residue, which effectively solves the technical problems in the prior art through the improvement of the manufacturing process, and the obtained polyaluminum chloride product does not contain water-insoluble Organic impurities, the appearance is light yellow, the product can meet the requirements of various occasions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0016] Get 100 grams of residue raw material, place it in a roasting furnace and carry out high-temperature roasting at a set temperature, and take it out when it reaches the set roasting time. The calcination temperature and calcination time that each embodiment is set are shown in Table 1.

[0017] Take the required amount of hydrochloric acid solution, put the above-mentioned roasted residue into it and heat it to the set reaction temperature to carry out the dissolution reaction until the residue is completely dissolved to form a solution. The reaction temperature that each embodiment is set, the concentration of hydrochloric acid solution used, the weight ratio of residue and hydrochloric acid are all shown in Table 1.

[0018] Under the pressure of 0.05-0.3MPa, heat the above solution to 80-100°C to start evaporation concentration and polymerization reaction, and continue to heat the reactant to 125-132°C to obtain a solid polyaluminum chloride product.

[0019] The mai...

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Abstract

The process of producing polyaluminum chloride with industrial residue from aluminum alkyl catalyzed acetaldehyde condensation process for producing ethyl acetate includes the following steps: roasting the residue at 470-680 deg.c for 2-6 hr; dissolving the roasted residue in 5-30 wt% concentration hydrochloric acid solution and reacting at 60-90 deg.c, with the weight ratio between the residue and the hydrochloric acid being 1 to 0.4-0.9; heating the resultant solution at 0.05-0.3 MPa and 80-100 deg.c for evaporating and polymerizing, and further heating the resultant to 125-132 deg.c to obtain solid polyaluminum chloride product. The product has high quality, no water insoluble organic impurity, and capacity of meeting use requirement in different fields.

Description

technical field [0001] The present invention relates to a method for producing polyaluminum chloride, in particular to a method for producing polyaluminum chloride by using ethyl acetate industrial residue as a raw material. production process. Background technique [0002] The acetaldehyde condensation method is a widely used industrial production method of ethyl acetate, which usually uses aluminum alkyl (generally aluminum ethoxide) as a catalyst. In the process, the catalyst aluminum hydroxide meets water to form the hydrolyzed product aluminum hydroxide. Since the hydrolyzed product aluminum hydroxide particles are very small, the specific surface is large, and the surface energy is high, so a large amount of ethyl acetate and some other substances are adsorbed on the surface. organic compounds. During the evaporation and drying process of the hydrolyzed product aluminum hydroxide, the adsorbed ethyl acetate and other organic compounds react and transform into complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C02F1/52
Inventor 苏勇李维舟刁春霞邓诗峰
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD