CN1136151C - Process for producing polymerized aluminium chloride - Google Patents
Process for producing polymerized aluminium chloride Download PDFInfo
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- CN1136151C CN1136151C CNB001322354A CN00132235A CN1136151C CN 1136151 C CN1136151 C CN 1136151C CN B001322354 A CNB001322354 A CN B001322354A CN 00132235 A CN00132235 A CN 00132235A CN 1136151 C CN1136151 C CN 1136151C
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- aluminium hydroxide
- base fluid
- basicity
- aluminum chloride
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Abstract
The present invention discloses a production technology for polyaluminium chloride, which mainly adopts first-grade aluminium hydroxide to replace ordinary aluminium hydroxide and high-alumina cement to replace sodium aluminate so as to regulate the basicity of a base solution. The procedure for adding polyacrylamide again is added to carry out precipitation in the step for regulating the basicity, and the last step is three steps of precipitation procedures. The technology provides a polyaluminium chloride solution whose basicity can be regulated to 45 degrees to 75 degrees. Moreover, the technology can improve the production efficiency, reduce the cost and save energy sources.
Description
Technical field
The present invention relates to the production method of water scavengine agent polymerize aluminum chloride.
Background technology
Known, polymerize aluminum chloride is drink water purifying agent at present commonly used, join former water with the polymerize aluminum chloride aqueous solution after, impurity in the precipitable water reduces the tap water turbidity, makes it limpid, forms tap water.The production method of existing preparation polymerize aluminum chloride comprises: adopting aluminium hydroxide and hydrochloric acid is raw material, pressurizes in the confined reaction jar, and the pyroreaction condition is finished through precipitation with sodium aluminate adjustment basicity after generating polymerize aluminum chloride.Its concrete steps are:
(1) will contain in mineral substance (white powder solid) the adding retort of aluminium hydroxide;
(2) then hydrochloric acid, water are added retort by basin;
(3) airtight back pressurization, intensification last reaction in about 10 hours, promptly get liquid aluminium polychloride and a spot of solid residue (this solid residue mainly is an aluminium hydroxide);
(4) with air pressure liquid product is added settling tank, simultaneously polyacrylamide is added settling tank precipitation about 2 hours;
(5) groove is adjusted in the input of gained base fluid, with sodium aluminate base fluid is adjusted, adjusted product is stored through precipitation input finished product pond.
(6) a little solid residue that is precipitated in the settling tank is recycled to utilize when retort is treated second jar of reaction and reclaims.
Its shortcoming is:
1, production cost is too high, and basicity only is adjustable to 45～55 degree, and when basicity is adjusted to 50 degree when above, polymeric aluminum chlorides solution can be accompanied by a large amount of throw outs and separate out.
2, adjust basicity with sodium aluminate and can cause the decomposition of polymerize aluminum chloride, reach more than 12%, adopt this kind method to reach if seek out alumina content.
Summary of the invention
At the defective of above-mentioned prior art, the purpose of this invention is to provide a kind of basicity and be adjustable to 45～75 degree, enhance productivity, reduce cost the polymerize aluminum chloride production method of save energy.
For achieving the above object, polymerize aluminum chloride production method of the present invention is characterized in that it in turn includes the following steps:
(1) pulverulent solids aluminium hydroxide or the mineral substance that contains aluminium hydroxide are added in the retort;
(2) hydrochloric acid, water are added retort;
(3) airtight back pressurization, intensification are reacted, and obtain liquid aluminium polychloride and a spot of solid residue;
(4) with air pressure liquid product is added settling tank, add the polyacrylamide precipitation simultaneously;
(5) groove is adjusted in the input of gained base fluid, base fluid is adjusted with high-alumina cement; Adding polyacrylamide after the adjustment once more precipitates; Stored in input finished product pond after final product went on foot sedimentations through three;
(6) to be recovered to retort stand-by for a little solid residue of precipitating of settling tank.
The ratio in the polymerize aluminum chloride of aluminium sesquioxide and the high-alumina cement weight that is used to modulate basicity in the step (5) in the base fluid is 1: 0.39～0.6.
In the step (5), the consumption of the polyacrylamide that adds in adjusting groove once more after with high-alumina cement base fluid being adjusted in adjusting groove accounts for 1/100000th～2.5 of base fluid weight this moment.
Said aluminium hydroxide is one-level aluminium hydroxide in the step (1).
Be to be pressurized to 2.4 kilograms～2.6 kilograms in the step (3), about 9 hours of reaction times.
About 1.5 hours of sedimentation time in the step (4).
This shows that the present invention and known production method relatively have following several characteristics:
(1) adopt one-level aluminium hydroxide to substitute the ordinary hydrogen aluminum oxide.
(2) substitute sodium aluminate with high-alumina cement base fluid is carried out the basicity adjustment.
(3) in adjusting the step of basicity, increased and added the sedimentary program of polyacrylamide once more.
(4) last step is the three-step precipitation program.
Adopt the manufacture method of polymerize aluminum chloride of the present invention can be achieved as follows beneficial effect: basicity can tune to 45～75, adjust the decomposition that basicity can not cause polymerize aluminum chloride with high-alumina cement, reach more than 12% if desire obtains alumina content, adopt method of the present invention to reach; Adopt production method of the present invention, substitute sodium aluminate with high-alumina cement and adjust basicity, can improve liquid aluminium polychloride productive rate rate and reach 43%, the ton cost of polymerize aluminum chloride can reduce by 150～200 yuan, and can obtain the polymerize aluminum chloride of higher concentration, improve a lot aspect the save energy for producing the solid polyaluminium chloride product.With the made finished product outward appearance clarification of method of the present invention, water white transparency, susceptible to user acceptance.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment, need to prove, the present invention is not limited to following embodiment.
＜embodiment one 〉
Step 1, at first 800 kilograms in pulverulent solids one-level aluminium hydroxide is joined in the 3000L retort;
Step 2,2000 kilograms hydrochloric acid (concentration is 30～31%), 500 kilograms water are added retort;
Behind step 3, the confined reaction jar and be pressurized to 2.5 kilograms, last reaction in about 9 hours, obtain liquid aluminium polychloride and a spot of solid residue, this solid residue mainly is unreacted aluminium hydroxide;
Step 4, liquid product is added settling tank, add 50～70 kilograms of the polyacrylamide solutions (notes are seen below in the preparation of polyacrylamide solution) that prepare simultaneously, precipitate 1.5 hours with air pressure;
Step 5, groove is adjusted in gained base fluid input, base fluid is adjusted with 200～300 kilograms of high-alumina cements (the Great Wall Aluminum is produced, and builds board 625#); Add 100～150 kilograms of 1000 kilograms of polyacrylamide solutions that prepare of entry (notes are seen below in the preparation of polyacrylamide solution) after the adjustment; Final product can obtain 4500～5000 kilograms of finished products after going on foot sedimentations (for guaranteeing the clarification of product, carrying out three step fractional precipitations for final product) through three approximately, imports the finished product pond and stores;
Step 6, a little solid residue that settling tank is precipitated are recovered to retort and treat to react again next time and utilize.
Press GB15892-1995 with above-mentioned six made polymeric aluminum chlorides solutions of step and measure, alumina content reaches 12%, belongs to top grade, and basicity is 60～65, and appearance colorless is transparent.Annotate: the compound method 1. of polyacrylamide solution adds 1 ton of water in the polyacrylamide groove, with being steam heated to 60～70 degree; 2. slowly add content and be 5～7 kilograms of 7～8% the gluey polyacrylamides of water white transparency; 3. keeping temperature is 60～70 degree, starts stirring.Fully dissolving after 4～5 hours.
Claims (2)
1, polymerize aluminum chloride production method is characterized in that it in turn includes the following steps:
(1) pulverulent solids aluminium hydroxide or the mineral substance that contains aluminium hydroxide are added in the retort;
(2) hydrochloric acid, water are added retort;
(3) airtight back pressurization, intensification are reacted, and are pressurized to 2.4 kilograms～2.6 kilograms, in about 9 hours of reaction times, obtain liquid aluminium polychloride and a spot of solid residue;
(4) with air pressure liquid product is added settling tank, add the polyacrylamide precipitation simultaneously, about 1.5 hours of sedimentation time;
(5) groove is adjusted in the input of gained base fluid, with high-alumina cement base fluid is adjusted, the ratio in the polymerize aluminum chloride of aluminium sesquioxide and the high-alumina cement weight that is used to modulate basicity in the base fluid is 1: 0.39～0.6, adds polyacrylamide after the adjustment once more and precipitates; The consumption of polyacrylamide accounts for 1/100000th～2.5 of base fluid weight this moment, and stored in input finished product pond after final product went on foot sedimentations through three;
(6) to be recovered to retort stand-by for a little solid residue of precipitating of settling tank.
2, polymerize aluminum chloride production method according to claim 1 is characterized in that said aluminium hydroxide is one-level aluminium hydroxide in the step (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001322354A CN1136151C (en) | 2000-11-10 | 2000-11-10 | Process for producing polymerized aluminium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001322354A CN1136151C (en) | 2000-11-10 | 2000-11-10 | Process for producing polymerized aluminium chloride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290656A CN1290656A (en) | 2001-04-11 |
| CN1136151C true CN1136151C (en) | 2004-01-28 |
Family
ID=4595066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001322354A Expired - Lifetime CN1136151C (en) | 2000-11-10 | 2000-11-10 | Process for producing polymerized aluminium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1136151C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100519417C (en) * | 2005-12-14 | 2009-07-29 | 中国科学院生态环境研究中心 | Method and apparatus for producing high-concentration and-purity nano-aluminum polychlorid by low-temperature film distillation technology |
| CN100460328C (en) * | 2007-04-28 | 2009-02-11 | 王军 | Technical process for producing chloride aluminum |
| CN109734167A (en) * | 2019-03-08 | 2019-05-10 | 宁夏水投清水源水处理科技有限公司 | A kind of preparation process of the efficient polymeric aluminum chloride for wastewater treatment |
| CN110902707B (en) * | 2019-12-31 | 2022-07-12 | 武宁县伊山口净水剂厂 | Production method of polyaluminum chloride |
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2000
- 2000-11-10 CN CNB001322354A patent/CN1136151C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1290656A (en) | 2001-04-11 |
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