CN105692669A - Preparation method of colorless transparent polyaluminum chloride - Google Patents
Preparation method of colorless transparent polyaluminum chloride Download PDFInfo
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- CN105692669A CN105692669A CN201610089446.5A CN201610089446A CN105692669A CN 105692669 A CN105692669 A CN 105692669A CN 201610089446 A CN201610089446 A CN 201610089446A CN 105692669 A CN105692669 A CN 105692669A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
Abstract
The invention discloses a preparation method of colorless transparent polyaluminum chloride.The preparation method includes: S1, putting, by weight, 70-115 parts of aluminum hydroxide, 315-430 parts of hydrochloric acid and 325-485 parts of water into a reaction pond for mixing, allowing reaction at 100-110 DEG C for 2-3 h, wherein concentration of hydrochloric acid is 25-35 wt%; S2, adding, by weight, 0-75 parts of calcium-containing compound into a product obtained in the S1, and allowing reaction for 0.5-1 h, wherein the calcium-containing compound is selected from one or multiple of calcium oxide, calcium hydroxide, calcium carbonate and calcium hydrophosphate; S3, adding, by weight, 55-130 parts of calcium aliminate into a product obtained in the S2 within a temperature range of 50-80 DEG C; S4, enabling a product obtained in the S3 to be in reaction for 2-4 h, and performing press filtering.
Description
Technical field
The invention belongs to the process group of water, waste water, sewage or mud, particularly to the Drinking Water production method with water treatment agent polyaluminium chloride。
Background technology
Polyaluminium chloride: have another name called hydroxyl polyaluminium chloride, aluminium chlorhydroxide, molecular formula: Aln(OH)mCl(3n-m), 0 < m < 3n；English name: Polyaluminiumchlioride, is called for short: PAC。
PAC is a kind of inorganic polymer containing aluminum。It, with efficient, the low consumption of inorganic coagulant and organic flocculant, low-corrosiveness and adaptable feature, has purposes very widely。Its application, except tap water purifying, Treatment of Industrial Water, sewage, waste water and Treatment of Sludge, is also applied to the non-water treatment fields such as casting, medicine, catalyst, cosmetics, papermaking, refractory material and leather。
Many employing aluminum ashes both at home and abroad of producing of polyaluminium chloride consider acid pasting, the aluminum soluble salt neutralisation such as aluminium hydroxide, aluminum chloride to be worth doing。Using aluminum ash bits to produce shortcoming is that raw material is subject to limitation, quality instability, impurity content big and complicated component。The mixed acid of this aluminium hydroxide with hydrochloric acid or hydrochloric acid and sulphuric acid is neutralized after being first modulated into the aluminium hydroxide containing amorphous carbon acid group with carbonic acid alkali and produces by Japanese Laid-Open Patent Publication clear 57-71818 introduction aluminum soluble salt again, and the shortcoming of this method is that energy consumption is big, material cost is high。This area has two places to introduce with bauxite for waste polyaluminium chloride: its technological process of a place is bauxite → pulverizing → roasting → acidleach (carrying out for twice) → sedimentation (with polyacrylamide) → modulation (with sodium hydroxide) → liquid polyaluminium chloride product。Its shortcoming is process cycle length, alkali consumption is big, quality is wayward, production cost is high；Another locates its technique is that bauxite → pulverizing → roasting → acidleach (compression air stirring) → melt cinder separates to obtain polyaluminium chloride product, and shortcoming is that product quality is low, namely aluminium sesquioxide, basicity and PH all do not reach " product index requirement ordered temporarily by liquid polyaluminium chloride " in product。
The task of the present invention is for overcoming disadvantages mentioned above, seeks a kind of raw material and is easy to get, and cost is low, can make constant product quality, the preparation method of the simple polyaluminium chloride of preparation method。
Summary of the invention
The preparation method that the present invention provides a kind of water white transparency polyaluminium chloride, can effectively solve the problems referred to above。
The preparation method of a kind of water white transparency polyaluminium chloride, comprises the following steps:
S1, puts into the water of the aluminium hydroxide of 70～115 parts of weight, the hydrochloric acid of 315～430 parts of weight, 325～485 parts of weight mixing in reaction tank, reacts 2～3 hours at 100～110 DEG C, and wherein, the concentration of hydrochloric acid is 25～35wt%；
S2, adds the calcium containing compound of 0～75 part of weight in the step S1 product obtained, and reacts 0.5～1 hour, wherein, described calcium containing compound in calcium oxide, calcium hydroxide, calcium carbonate and calcium hydrogen phosphate one or more；And
S3, the product obtained by step S2 adds the calcium aluminate of 55～130 parts of weight in 50～80 DEG C of temperature ranges；And
S4, the product obtained by step S3 reacts 2～4 hours at 90～100 DEG C, and filter pressing。
Preferably, in step sl, the water of the aluminium hydroxide of 80～100 parts of weight, the hydrochloric acid of 350～400 parts of weight, 400～450 parts of weight is put into mixing in reaction tank。
Preferably, the concentration of described hydrochloric acid is 31wt%。
Preferably, in step s 2, the calcium containing compound of 30～60 parts of weight is added the step S1 product obtained。
Preferably, in step s 2, the calcium containing compound of 50～60 parts of weight is added the step S1 product obtained。
Preferably, in step s3, the product obtained by step S2 adds calcium aluminate in 60～80 DEG C of temperature ranges。
Preferably, in step s3, the calcium aluminate of 80～120 parts of weight is added。
Preferably, the preparation method of described calcium aluminate comprises the following steps:
S31, is that 1:2～4 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate or calcium hydroxide；
S32, adding water the product that step S31 obtains, and stirs, being bonded together until being sufficiently mixed；And
S33, by step S32 obtain product react 2～5 hours at 1200～1400 DEG C, after treat its cool down and fully pulverize。
Preferably, in step S33, the product that step S32 obtains is reacted 2～5 hours at 1250～1300 DEG C。
Preferably, in step s 4, the product obtained by step S3 reacts 2～4 hours at 96～98 DEG C。
Polyaluminium chloride described in water white transparency provided by the invention, has the advantage that its raw material is simple, cost is low, stable performance, indices meets the requirements, particularly limits of harmful substances index all can comply fully with index request from theory and practice angle。
Accompanying drawing explanation
The preparation method flow chart of the water white transparency polyaluminium chloride that Fig. 1 provides for the embodiment of the present invention。
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail。It is understood that specific embodiment described herein is only used for explaining the present invention, but not limitation of the invention。It also should be noted that, for the ease of describing, accompanying drawing illustrate only part related to the present invention but not entire infrastructure。
Refer to Fig. 1, the preparation method that the embodiment of the present invention provides a kind of water white transparency polyaluminium chloride, comprise the following steps:
S1, puts into the water of the aluminium hydroxide of 70～115 parts of weight, the hydrochloric acid of 315～430 parts of weight, 325～485 parts of weight mixing in reaction tank, reacts 2～3 hours at 100～110 DEG C, and wherein, the concentration of hydrochloric acid is 25～35wt%；
S2, adds the calcium containing compound of 0～75 part of weight in the step S1 product obtained, and reacts 0.5～1 hour, wherein, described calcium containing compound in calcium oxide, calcium hydroxide, calcium carbonate and calcium hydrogen phosphate one or more；And
S3, the product obtained by step S2 adds the calcium aluminate of 55～130 parts of weight in 50～80 DEG C of temperature ranges；And
S4, the product obtained by step S3 reacts 2～4 hours at 90～100 DEG C, and filter pressing。
In step sl, it is preferred that the water of the aluminium hydroxide of 80～100 parts of weight, the hydrochloric acid of 350～400 parts of weight, 400～450 parts of weight is put into mixing in reaction tank。It is furthermore preferred that the water of the aluminium hydroxide of 90～100 parts of weight, the hydrochloric acid of 360～400 parts of weight, 410～450 parts of weight to be put into mixing in reaction tank。In the present embodiment, the water of the aluminium hydroxide of 95 parts of weight, the hydrochloric acid of 380 parts of weight, 420 parts of weight is put into mixing in reaction tank。The concentration of described hydrochloric acid is preferably 28～32wt%, and in the present embodiment, the concentration of described hydrochloric acid is about 31wt%。
In step s 2, it is preferred that the calcium containing compound of 30～60 parts of weight is added the step S1 product obtained。It is furthermore preferred that the calcium containing compound of 50～60 parts of weight to be added the step S1 product obtained。In the present embodiment, the calcium containing compound of 55 parts of weight is added the step S1 product obtained。Reaction temperature in step S2 is 15～110 DEG C, i.e. can keep the reaction temperature of step S1, it is also possible to drop 2 low reactions under room temperature。
In step s3, it is preferred that the product obtained by step S2 is incubated to 60～80 DEG C, and adds the calcium aluminate of 80～120 parts of weight。In the present embodiment, the product obtained by step S2 is incubated to 75 DEG C, and adds the calcium aluminate of 100 parts of weight。
The preparation method of described calcium aluminate comprises the following steps:
S31, is that 1:2～4 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate or calcium hydroxide；
S32, adding water the product that step S31 obtains, and stirs, being bonded together until being sufficiently mixed；And
S33, by step S32 obtain product react 2～5 hours at 1200～1400 DEG C, after treat its cool down and fully pulverize。
In step S31, it is that 1:2～4 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate or calcium hydroxide, to form CaO:Al2O3The calcium aluminate of=1:1～2。Preferably, it is that 1:2～3 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate or calcium hydroxide, to form CaO:Al2O3The calcium aluminate of=1:1～1.5。In the present embodiment, it is that 1:3 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate。Additionally, it is preferred that, use calcium carbonate to mix with aluminium hydroxide, so that calcium carbonate is conducive to producing gas during follow-up reaction under the high temperature conditions, and then advantageously form loose structure。
In step S33, it is preferred that the product that step S32 obtains is reacted 2～5 hours at 1250～1300 DEG C。In the present embodiment, the product that step S32 obtains is reacted 3 hours at 1275 DEG C。
In step s 4, it is preferred that the product obtained by step S3 reacts 2～4 hours at 96～98 DEG C。In the present embodiment, the product obtained by step S3 reacts 3 hours at 97 DEG C。It is demonstrated experimentally that by controlling reaction temperature, it is possible to obtain the polyaluminium chloride having good stability。Can be obtained the polyaluminium chloride of colorless and transparent by preparation method of the present invention, the product obtained with existing preparation method has significant difference。
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle。It will be appreciated by those skilled in the art that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute without departing from protection scope of the present invention。Therefore, although the present invention being described in further detail by above example, but the present invention is not limited only to above example, when without departing from present inventive concept, other Equivalent embodiments more can also be included, and the scope of the present invention is determined by appended right。
Claims (10)
1. the preparation method of a water white transparency polyaluminium chloride, it is characterised in that comprise the following steps:
S1, puts into the water of the aluminium hydroxide of 70～115 parts of weight, the hydrochloric acid of 315～430 parts of weight, 325～485 parts of weight mixing in reaction tank, reacts 2～3 hours at 100～110 DEG C, and wherein, the concentration of hydrochloric acid is 25～35wt%；
S2, adds the calcium containing compound of 0～75 part of weight in the step S1 product obtained, and reacts 0.5～1 hour, wherein, described calcium containing compound in calcium oxide, calcium hydroxide, calcium carbonate and calcium hydrogen phosphate one or more；And
S3, the product obtained by step S2 adds the calcium aluminate of 55～130 parts of weight in 50～80 DEG C of temperature ranges；And
S4, the product obtained by step S3 reacts 2～4 hours at 90～100 DEG C, and filter pressing。
2. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step sl, puts into mixing in reaction tank by the water of the aluminium hydroxide of 80～100 parts of weight, the hydrochloric acid of 350～400 parts of weight, 400～450 parts of weight。
3. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that the concentration of described hydrochloric acid is 31wt%。
4. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step s 2, adds the step S1 product obtained by the calcium containing compound of 30～60 parts of weight。
5. the preparation method of water white transparency polyaluminium chloride according to claim 4, it is characterised in that in step s 2, adds the step S1 product obtained by the calcium containing compound of 50～60 parts of weight。
6. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step s3, the product obtained by step S2 adds calcium aluminate in 60～80 DEG C of temperature ranges。
7. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step s3, adds the calcium aluminate of 80～120 parts of weight。
8. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that the preparation method of described calcium aluminate comprises the following steps:
S31, is that 1:2～4 mix with aluminium hydroxide according to the mol ratio of Ca and Al by calcium carbonate or calcium hydroxide；
S32, adding water the product that step S31 obtains, and stirs, being bonded together until being sufficiently mixed；And
S33, by step S32 obtain product react 2～5 hours at 1200～1400 DEG C, after treat its cool down and fully pulverize。
9. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step S33, reacts the product that step S32 obtains 2～5 hours at 1250～1300 DEG C。
10. the preparation method of water white transparency polyaluminium chloride according to claim 1, it is characterised in that in step s 4, the product obtained by step S3 reacts 2～4 hours at 96～98 DEG C。
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| CN201610089446.5A CN105692669A (en) | 2016-02-17 | 2016-02-17 | Preparation method of colorless transparent polyaluminum chloride |
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| CN201610089446.5A CN105692669A (en) | 2016-02-17 | 2016-02-17 | Preparation method of colorless transparent polyaluminum chloride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520772A (en) * | 2020-12-23 | 2021-03-19 | 四川科龙达环保股份有限公司 | Method for producing high-purity colorless transparent polyaluminum chloride by using aluminum ash |
| CN115417437A (en) * | 2022-09-06 | 2022-12-02 | 广东名桂环保有限公司 | Novel composite polyaluminum chloride water purifying agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070170A (en) * | 2009-11-19 | 2011-05-25 | 蓝保(厦门)水处理科技有限公司 | Method for producing polyaluminium chloride |
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- 2016-02-17 CN CN201610089446.5A patent/CN105692669A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070170A (en) * | 2009-11-19 | 2011-05-25 | 蓝保(厦门)水处理科技有限公司 | Method for producing polyaluminium chloride |
Non-Patent Citations (1)
| Title |
|---|
| 孙传尧主编: "《选矿工程师手册 第4册》", 31 March 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520772A (en) * | 2020-12-23 | 2021-03-19 | 四川科龙达环保股份有限公司 | Method for producing high-purity colorless transparent polyaluminum chloride by using aluminum ash |
| CN115417437A (en) * | 2022-09-06 | 2022-12-02 | 广东名桂环保有限公司 | Novel composite polyaluminum chloride water purifying agent |
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