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Production method of polyaluminum chloride without heating

A technology of polyaluminum chloride and its production method, which is applied in the direction of aluminum chloride and aluminum halide, can solve the problems of steam heating and waste of energy, and achieve the effects of increasing the amount of feed, saving investment and increasing production

Active Publication Date: 2011-12-14
周松玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome defects such as steam heating and waste of energy in the existing production technology of polyaluminum chloride, and provide a production method of polyaluminum chloride without heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: A heating-free production method of polyaluminum chloride

[0034] The heating-free production method of polyaluminum chloride of the present invention, the detailed steps of the production method are as follows:

[0035] a. Acid preparation: add 1 ton of hydrochloric acid with a mass percentage of 30% as the feed standard, add the hydrochloric acid to the reaction tank, and then add the absorption circulating water in step b or step d (the temperature of the absorption circulating water is 50~ 60℃), dilute hydrochloric acid with a mass percentage concentration of 30% to a mass percentage concentration of 18%;

[0036] b. Under the condition of constant stirring, add 290kg bauxite (Al in bauxite 2 O 3 The mass percentage of calcium aluminate is 25-40%), and then add an appropriate amount of calcium aluminate powder (Al in calcium aluminate powder) 2 O 3 The mass percentage content of calcium aluminate is 48-55%, and the active Ca is 9-13). Through the exothermic rea...

Embodiment 2

[0039] Embodiment 2: It is basically the same as embodiment 1, except that:

[0040] The heating-free production method of polyaluminum chloride of the present invention, the detailed steps of the production method are as follows:

[0041] In step a: dilute hydrochloric acid with a mass percentage concentration of 30% to a mass percentage concentration of 15%;

[0042] In step b: add 260kg bauxite to the reaction tank, stop adding calcium aluminate powder when the temperature of the reaction solution rises to 85-86°C, and the temperature of the reaction solution rises to 96-98°C by itself, under this temperature condition After reacting for 1.9 hours, the reaction is over, and the concentration of the reaction solution after the reaction is 38 Baume degrees;

[0043] In step c: dilute the concentration of the reaction solution to 20 Baume degrees, at this time the temperature of the reaction solution is 68°C;

[0044] In step d: 250 kg of calcium aluminate powder is added to the dilute...

Embodiment 3

[0045] Embodiment 3: It is basically the same as Embodiment 1, except that:

[0046] The heating-free production method of polyaluminum chloride of the present invention, the detailed steps of the production method are as follows:

[0047] In step a: dilute hydrochloric acid with a mass percentage concentration of 30% to a mass percentage concentration of 20%;

[0048] In step b: add 320kg bauxite into the reaction tank, stop adding calcium aluminate powder when the temperature of the reaction solution rises to 85-86°C, and the temperature of the reaction solution rises to 103-104°C by itself, under this temperature condition After reacting for 1.6 hours, the reaction is over, and the concentration of the reaction solution after the reaction is 35 Baume degrees;

[0049] In step c: dilute the concentration of the reaction solution to 22 Baume degrees, at this time the temperature of the reaction solution is 69°C;

[0050] In step d: 300 kg of calcium aluminate powder is added to the di...

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Abstract

The invention discloses a heating-free production method of polyaluminum chloride. The heating-free production method comprises the following steps of: firstly, diluting a raw material, i.e. hydrochloric acid, into a needed concentration, then adding bauxite under the condition of continuous stirring, adding a proper amount of calcium aluminate powder till the temperature of a reaction liquid rises to 84-87 DEG C, then automatically raising the temperature to 95-105 DEG C for reaction through heat release, observing the concentration of the reaction liquid after the reaction is ended, diluting the concentration of the reaction liquid to a needed concentration, then adding calcium aluminate powder for polymerization reaction, adjusting the concentration of the reaction liquid to a needed concentration after the reaction is ended, and obtaining a liquid product, i.e. the polyaluminum chloride. According to the heating-free production method of the polyaluminum chloride, steam heating isnot needed, thus heating equipment is omitted, and hydraulic acid steam generated in the reaction process is recycled through an absorbing device. Therefore, the heating-free production method disclosed by the invention has the advantages of being low in investment cost, saving energy, reducing consumption and emission, being beneficial to environmental friendliness and having obvious economic benefits and social benefits.

Description

technical field [0001] The invention relates to a production method of polyaluminum chloride as a flocculant, in particular to a production method of polyaluminum chloride without heating. Background technique [0002] Polyaluminum chloride is an inorganic polymer flocculant, widely used in urban and various industrial water purification treatment, deep purification treatment of industrial wastewater, oilfield groundwater reinjection and sludge treatment and other fields. Polyaluminum chloride is an inorganic polymer water treatment flocculant with relatively mature technology and the largest market sales volume. Although the production process of polyaluminum chloride is relatively mature, there are still some gaps defect. [0003] Polyaluminum chloride (PAC) is a commonly used high-efficiency water treatment additive. Aluminum-containing raw materials such as hydrochloric acid, calcium aluminate powder and bauxite are the main raw materials for preparing polyaluminum chlo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
Inventor 周松玉
Owner 周松玉
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