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Novel production process of concentrated polyaluminum chloride

A technology of polyaluminum chloride and polyaluminum chloride, which is applied in aluminum chloride, aluminum halide, chemical industry and other directions, can solve the problems of inability to concentrate liquid polyaluminum chloride, low production efficiency, and product purification performance to be improved, etc. To achieve the effect of improving purification efficiency and safety of use, improving production efficiency, and good sterilization and purification effect

Active Publication Date: 2019-07-16
河南长隆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional polyaluminum chloride production process adopts the first-level water film dedusting process to remove dust and cool down, and uses water spraying, so the heat energy utilization of the drying tower is zero, and the liquid polyaluminium chloride cannot be concentrated, the production efficiency is low, and the product purification performance is low. needs to be improved

Method used

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  • Novel production process of concentrated polyaluminum chloride

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Comparison scheme
Effect test

Embodiment 1

[0026] The invention provides a kind of production technique of novel concentrated polyaluminum chloride, and concrete steps are as follows:

[0027] Step 1: Prepare 1 part of aluminum hydroxide and 3 parts of hydrochloric acid, react active aluminum hydroxide and hydrochloric acid under high temperature and high pressure environment to form aluminum chloride aqueous solution, add deionized water to the aqueous solution to dilute, and obtain polymerized liquid polyaluminum chloride , Standby, wherein the reaction temperature is set to 70°C, the reaction pressure is set to 0.5MPa, the mass ratio of the deionized water to aluminum chloride water is set to 1:3, and the concentration of the obtained polyaluminum chloride liquid is 13.6%, the salinity is 40.2%, and the pH value is 4.2;

[0028] Step 2: add sodium hydroxide, sodium carbonate, lime to react in the polymerized liquid polyaluminum chloride prepared in step 1, increase the OH ion content in the polymerized liquid polyal...

Embodiment 2

[0037] The invention provides a kind of production technique of novel concentrated polyaluminum chloride, and concrete steps are as follows:

[0038] Step 1: Prepare 2 parts of aluminum hydroxide and 5.5 parts of hydrochloric acid, react active aluminum hydroxide and hydrochloric acid under high temperature and high pressure environment to form aluminum chloride aqueous solution, add deionized water to the aqueous solution to dilute, and obtain polymerized liquid polyaluminum chloride , Standby, wherein the reaction temperature is set to 110 ° C, the reaction pressure is set to 0.7MPa, the mass ratio of the deionized water to aluminum chloride water is set to 1:4, and the concentration of the obtained polyaluminum chloride liquid is 13.8%, the salinity is 43%, and the pH value is 4.4;

[0039] Step 2: add sodium hydroxide, sodium carbonate, lime to react in the polymerized liquid polyaluminum chloride prepared in step 1, increase the OH ion content in the polymerized liquid po...

Embodiment 3

[0048] The invention provides a kind of production technique of novel concentrated polyaluminum chloride, and concrete steps are as follows:

[0049] Step 1: Prepare 3 parts of aluminum hydroxide and 8 parts of hydrochloric acid, react active aluminum hydroxide and hydrochloric acid under high temperature and high pressure environment to form aluminum chloride aqueous solution, add deionized water to the aqueous solution to dilute, and obtain polymerized liquid polyaluminum chloride , Standby, wherein the reaction temperature is set to 150 ° C, the reaction pressure is set to 0.8MPa, the mass ratio of the deionized water to aluminum chloride water is set to 1:5, and the concentration of the obtained polyaluminum chloride liquid is 14%, the salinity is 43.5%, and the pH value is 4.6;

[0050] Step 2: add sodium hydroxide, sodium carbonate, lime to react in the polymerized liquid polyaluminum chloride prepared in step 1, increase the OH ion content in the polymerized liquid poly...

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Abstract

The invention discloses a novel production process of concentrated polyaluminum chloride, and particularly relates to the field of water purification materials. The production process comprises the following five steps: preparing an aluminum chloride water solution by using an aluminum hydroxide method, adding sodium hydroxide, sodium carbonate and lime to adjust the basicity and acid-base property, carrying out impurity removal and desulfurization, carrying out multi-stage spray concentration, and carrying out sealing and storing, so that the concentrated polyaluminium chloride is prepared. The technological process is simple, and the production indexes of the concentrated polyaluminium chloride are convenient to control. According to the invention, reaction impurities and sulfides in a mixed solution are removed by a water dust removal process, the purity of the concentrated polyaluminium chloride is improved, and the purification standard of drinking water is achieved; a multi-stagespraying process is adopted to effectively utilize heat energy of tail gas of a drying tower, so that energy is saved, and consumption is reduced; liquid polymerized aluminum chloride is concentrated, and production efficiency is improved; the liquid is concentrated step by step, and finally the concentration is finely adjusted, so that concentration control is facilitated, and crystallization isprevented.

Description

technical field [0001] The present invention relates to the field of water purification materials. More specifically, the present invention relates to a production process of novel concentrated polyaluminum chloride. Background technique [0002] Liquid polyaluminum chloride is an inorganic polymer flocculant, through the action of hydroxyl ion functional groups and polyvalent anion polymeric functional groups, it produces inorganic polymers with large molecular weight and high charge. Polyaluminum chloride has large molecular structure, strong adsorption capacity, low dosage, and low treatment cost; good solubility, high activity, large alum flowers formed by condensation in water, fast settlement, and greater purification capacity than other inorganic flocculants by 2- 3 times; strong adaptability, less affected by the PH value and temperature of the water body, the raw water can meet the national drinking water standard after purification, the water quality after treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
CPCC01F7/56Y02P20/10
Inventor 许志远郭小七吴晓红李明元
Owner 河南长隆科技有限公司