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A kind of production technology of concentrated polyaluminum chloride

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

Active Publication Date: 2021-07-06
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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  • A kind of production technology of concentrated polyaluminum chloride

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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 production process of concentrated polyaluminum chloride, specifically relates to the field of water purification materials, including the preparation of aluminum chloride aqueous solution by the aluminum hydroxide method - adding sodium hydroxide, sodium carbonate and lime to adjust the basicity and acidity and alkalinity ‑Impurity removal and desulfurization‑multi-stage spray concentration‑sealed storage five steps to prepare concentrated polyaluminum chloride, the process is simple, and the production index of concentrated polyaluminum chloride is easy to control. The water film dedusting process of the present invention removes reaction impurities and sulfides in the mixed liquid, improves the purity of concentrated polyaluminum chloride, and meets drinking water purification standards, adopts a multi-stage spraying process, effectively utilizes the heat energy of the tail gas of the drying tower, saves energy and reduces consumption, Concentrate liquid polyaluminum chloride to improve production efficiency, concentrate liquid concentration step by step, and finally fine-tune the concentration to facilitate concentration control and prevent crystallization.

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 Patents(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
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