KR20050011293A - Manufacturing method of waste water cohesive agents and manufactured goods thereof - Google Patents

Abstract

PURPOSE: To provide a cohesive agent, which shows stability and good cohesive capacity at a basicity of not less than 70%, and a method for preparing the cohesive agent. CONSTITUTION: The method comprises the steps of (a) mixing 15-28 wt.% of Al(OH)3 having Al2O3 concentration of 40-68%, 50-75 wt.% of HCl at a concentration of 25-35%, 0.5-10 wt.% of H2SO4 at a concentration of 50-98%, and 0.6-25 wt.% of water; (b) reacting the mixture obtained from the step (a) at a temperature of 90-125 deg.C for 5-20 hours to prepare AlClSO3 having Al2O3 concentration of 9-14% and basicity of not more than 10%; (c) mixing 46-75 wt.% of AlClSO3 obtained from the step (b), 10-25 wt.% of NaOH having Na2O concentration of 15-40%, 0.01-10.0 wt.% of Na2SiO3 having SiO2 concentration of 5-40%, and 15-35 wt.% of water; and (d) reacting the mixture obtained from the step (c) at a temperature of 30-60 deg.c with velocity gradient of 1.000 second to prepare Al2(OH)3Cl2(SO4)2(SiO2).

Description

Manufacturing method of waste water cohesive agents and manufactured goods etc.

The present invention relates to a method for producing a flocculant for water treatment and to a flocculant for water treatment, and more particularly, to a poly flocculant as a flocculant for water treatment in which suspended particles suspended in sewage or sewage and waste water are flocculated by chemical treatment to form flocs. Aluminum silicate sulfate (PAHCSS) and its manufacturing method.

It is well known that there is a lack of awareness of environmental conservation in the course of rapid economic development. Due to this lack of awareness of environmental conservation, the level of pollution as well as air quality has reached a very serious level. In particular, domestic sewage, agricultural and livestock waste, and industrial wastewater cause pollution of public waters such as appeals, inner bays and inland seas, and urban small and medium rivers.

In recent years, due to rapid industrial development, population growth, and urban population concentration, the amount of inorganic and organic components in the wastewater is gradually increasing along with the increase of various water volumes. Such waste water contains high concentrations of organic matter such as chemical oxygen demand (COD), biochemical oxygen demand (BOD), SS (suspension material), nitrogen, phosphorus, etc. This, of course, leads to the destruction of the ecosystem due to toxicity and adversely affects the environment. Therefore, the wastewater is set to a predetermined standard, and is purified to drain below a predetermined standard value.

On the other hand, in the method of removing suspended particles in the waste water during the treatment of waste water, the conventional treatment is chemical treatment, electrical treatment, filtration, membrane treatment or the like. First, the most representative treatment method is to use a coagulant in chemical treatment, and using an inorganic or organic coagulant to change the surface properties of the particles to form a floc and to precipitate the most common method until now. Known.

As the inorganic coagulant used in the above-described chemical treatment, an aluminum or iron coagulant is used, and as the organic coagulant, various kinds such as polyacrylamide, poly-d mac and polyamine are used. The greatest advantage of this chemical treatment is that it can be removed by aggregation up to 0.1 micron particle size. Therefore, the chemical coagulation treatment method is essentially used at the time of purified water treatment.

In the chemical treatment method described above, the surface of the particles dispersed in water generally has a negative charge and repels homogeneous particles, but when positive metals are introduced from the outside, a neutral reaction occurs on the surface and the particles are attracted to each other. The force of attraction is generated to induce the growth of particles, causing the flocs to grow. As the floc grows, it settles down and accumulates as sludge. The separation of water and particles through this process requires enormous processing space, processing time and processing costs. That is, when the suspended solids are removed by the above-described chemical treatment method, there is a problem in that sludge generation is inevitably raised, and there is a problem that treatment costs increase due to the use of chemicals.

On the other hand, aluminum (as a conventional inorganic coagulant) ) Flocculants and iron ( Salt-based flocculants are widely used, but these aluminum ( ) Flocculants and iron ( Salt-based flocculants are materials of low molecular weight and have a disadvantage in that the size of molecular particles in the aqueous solution is small and the effect of removing turbidity and the ability to remove organic substances such as suspended solids are not sufficient. In particular, in Korea, the high turbidity between June and September, which is the rainy season (the rainy season), has a problem that the treatment capacity is significantly reduced.

As mentioned above, conventional aluminum ( ) Flocculants and iron ( The aggregation method in the aqueous solution of the salt-based flocculant is as follows.

Conventional aluminum as described above ( ) And iron ( The salt-based inorganic coagulant has a problem in that excessive sludge occurs due to excessive injection as a monomolecular or low molecular weight flocculant.

In addition, conventional aluminum ( ) And iron ( Salt-based inorganic coagulants are not able to remove the appropriate turbidity, so that high-quality treated water cannot be obtained, and there is a problem of dementia due to aluminum and iron remaining in the treated water. Therefore, conventional aluminum ( ) And iron ( In the case of salt-based inorganic coagulants, it is difficult to use them because the dosage should be adjusted exactly.

Furthermore, conventional aluminum as described above ( ) And iron ( Salt-based inorganic coagulants have a problem that a precipitate occurs in the flocculant when stored for a long time, the loss of the product.

The present invention has been made to solve the above problems, the existing aluminum ( ) And iron ( Polysilicate salt as a coagulant with excellent flocculation ability with stability at above 70% by improving stability of mono- and low-molecular-weight or low-basic products, which are disadvantages of salt-based inorganic coagulants. It is an object of the present invention to provide a method of preparing aluminum sulphate (Polyaluminum Chloro-Sulfate Silicate: PAHCSS) and a water treatment agent flocculant.

Another object of the present invention is aluminum chloride ( ) And sodium hydroxide ( ) And sodium silicate ( ) To produce polyaluminum silicate sulfate (PAHCSS) as a water treatment agent flocculant by mixing the appropriate amount under appropriate conditions to improve the removal effect of organic matter in water treatment and to increase the size of floc to further increase the flocculation speed. It is in such a way.

Furthermore, the present invention is in addition to the above-mentioned objects aluminum chloride ( ) And sodium hydroxide ( ) And sodium silicate ( ) To produce polyaluminum silicate sulfate (PAHCSS) as a water treatment agent coagulant by mixing the appropriate amount under appropriate conditions, so that no precipitation is generated in the coagulant even during long-term storage to prevent economic loss.

The present invention is configured to achieve the object as described above is as follows. That is, the method for producing a flocculant for water treatment according to the present invention is a method for producing a flocculant for water treatment in which suspended particles suspended in sewage or sewage or waste water are flocculated by a chemical treatment to form flocs, thereby (a) oxidation. aluminum( Aluminum hydroxide with a concentration of 40-68% Hydrochloric acid (15-28 wt%, concentration 25-35%) 50-75 wt% sulfuric acid (concentration 50-98%) ) 0.5 to 10 wt%, water ( ) Mixing 0.6-25 wt%; (B) The mixture of step (a) is reacted for 5 to 20 hours under the temperature condition of 90 to 125 ℃ to obtain aluminum oxide ( ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less Preparing); (C) in step (b) aluminum oxide ( ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ) 46-75 wt%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10-25 wt%) Sodium silicate (5-40%) ) 0.01 to 10.0 wt% and water ( ) Mixing 15 to 35 wt%; And (d) mixing and reacting the mixture of step (c) at a rate of 1,000 s in a rate gradient of 1,000 seconds under a temperature condition of 30 to 60 캜. It comprises a step of manufacturing).

In step (c) of the above-described configuration, low-basic aluminum chloride sulfate ( ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( 4 wt% or less of calcium carbonate, based on a mixture of 15-35 wt% ) Are further mixed with a polysilicate aluminum chloride sulfate having a basic Can be configured to make). At this time, calcium carbonate ( ) Is sodium carbonate ( Can be replaced with).

On the other hand, polysilicate aluminum sulfate sulfate prepared through the process as described above ( ) Is aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) The condition of 0.001 to 10.0% is satisfied.

Aluminum hydroxide of the above-mentioned step (a) ( ) Is aluminum ( May be used in place of another compound in the salt state, and ) Is sulfate ion ( Sodium silicate of step (c) ) Is silicic acid ( It can be used in place of another compound in the salt state. In addition, sodium hydroxide of step (c) ( ) Is sodium aluminate ( Can be replaced with).

Sodium silicate ( ) And sodium hydroxide ( ) Is sodium aluminum silicate ( Can be replaced with).

On the other hand, the flocculant for water treatment according to the present invention (aluminum oxide ( Aluminum hydroxide with a concentration of 40-68% Hydrochloric acid (15-28 wt%, concentration 25-35%) 50-75 wt% sulfuric acid (concentration 50-98%) ) 0.5 to 10 wt%, water ( Aluminum oxide prepared by reacting 0.6-25 wt% at a temperature of 90-125 ° C. for 5-20 hours. ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ) 46-75 wt%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10-25 wt%) Sodium silicate (5-40%) ) 0.01 to 10.0 wt% and water ( A high molecular weight polysilicate silicate sulfate was mixed by reacting 15 to 35 wt% at a rate equivalent to 1,000 seconds under a temperature gradient of 30 to 60 ° C. Is prepared).

The above-described low basic aluminum chloride sulfate ( ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( Calcium carbonate (for mixtures mixed at a ratio of 15 to 35 wt%) ) Is further mixed in a ratio of 4 wt% or less to form polysilicate aluminum sulfate ) Can be made. At this time, calcium carbonate ( ) Is sodium carbonate ( Can be replaced with).

On the other hand, high molecular weight polysilicate aluminum sulfate prepared as described above ( ) Is aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) The condition of 0.001 to 10% is satisfied.

In the above-described configuration, aluminum hydroxide ( ) Is aluminum ( It can be used in place of another compound in the salt state, sulfuric acid ( ) Is sulfate ion ( It can be used in place of other compounds in the salt state. Sodium silicate ( ) Is silicic acid ( It can be used in place of another compound in the salt state. In addition, sodium hydroxide ( ) Is sodium aluminate ( Can be replaced with).

Sodium silicate ( ) And sodium hydroxide ( ) Is sodium aluminum silicate ( Can be replaced with).

Hereinafter, a method for preparing a flocculant for water treatment and a flocculant for water treatment according to a preferred embodiment of the present invention will be described in detail.

The present invention is a conventional aluminum (as revealed in the above object) ) And iron ( Improved the problem that mono-, low-molecular-weight or low-basicity products are unstable and precipitated due to the weakness of salt-based inorganic coagulant. It is about.

Looking at the manufacturing method of the water treatment agent flocculant according to the present invention, first, (A) aluminum hydroxide ( ), Hydrochloric acid( ), Sulfuric acid ( ) And water ( ), The mixing ratio of 15 to 28: 50 to 75: 0.5 to 10.0: 0.6 to 25 wt%.

In the above-mentioned process (a), aluminum hydroxide ( ) Is aluminum oxide ( ) Concentration is 40-68%, hydrochloric acid ( ) Concentration is 25-35%, sulfuric acid ( ), The concentration is 50 to 98%.

(B) The mixture of step (a) is reacted for 5 to 20 hours under the temperature condition of 90-125 ℃ to make low-basic aluminum chloride sulfate ( ) Will be manufactured.

Low-basic aluminum chloride sulfate prepared in the process of (b) described above ( ) Is aluminum oxide ( ) Concentration is 9-14%, and basicity is made 10% or less.

On the other hand, to prepare a high molecular weight polysilicate aluminum sulfate (PAHCSS) according to the present invention as described above hydrochloric acid ( ), Sulfuric acid ( ) And aluminum hydroxide ( ) In an appropriate proportion to mix low-basic aluminum chloride ( ), And the following reaction formula is hydrochloric acid ( ), Sulfuric acid ( ) And aluminum hydroxide ( ) In an appropriate proportion to mix low-basic aluminum chloride ( Is a reaction scheme for preparing

Where n and k are 0 ≦ n ≦ 1.5 and 0 ≦ k ≦ 0.5, respectively.

(C) Aluminum oxide prepared in process (b) ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ), Sodium hydroxide ( ), Sodium silicate ( ) And water ( ), The mixing ratio of 46 to 75: 10 to 25: 0.01 to 10.0: 15 to 35 wt%.

Sodium hydroxide in the above-mentioned process (c) ) Is sodium oxide ( ) Concentration is 15-40%, and sodium silicate ( ) Is silicon oxide ( ), The concentration is 5 to 40%.

(D) The mixture of step (c) is mixed and reacted at a rate corresponding to a rate gradient of 1,000 seconds under a temperature condition of 30 to 60 DEG C. ).

High molecular weight polysilicate aluminum sulfate sulfate prepared by the mixing reaction of the above-mentioned process (d) ( ) Is aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) 0.001 to 10.0%.

As described above, the water treatment agent coagulant having stability even at a basicity of 50% or more and having excellent coagulation ability is a high molecular weight polyhydrogen aluminum silicate chloride (PAHCSS) having the following reaction formula.

Here, n is 2.7 to 5 and 0 ≦ k ≦ 4.3.

High molecular weight polysilicate aluminum sulfate (PAHCSS) having the same reaction scheme as in Scheme 2 described above is made of aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) It was the best performance as flocculant for water treatment at 0.001 ~ 10.0%.

High molecular weight polysilicate polysilicate sulfate prepared according to the production method of the present invention as described above ( Process in the manufacturing process of ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( Calcium carbonate (for mixtures mixed at a ratio of 15 to 35 wt%) ) May be further mixed in a proportion of 4 wt% or less. Like this, calcium carbonate ( ) Is further mixed at a ratio of 4 wt% or less with respect to the mixture, thereby obtaining a high molecular weight polysilicate silicate sulfate ) Can be prepared.

As mentioned above, low-basic aluminum chloride sulfate ( ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( Calcium carbonate (for mixtures mixed at a ratio of 15 to 35 wt%) ) Is expressed as follows.

Here, n is 2.7 to 5 and 0 ≦ k ≦ 4.3.

Calcium carbonate in Scheme 3 described above ( ) Is sodium carbonate ( Can be replaced with). The reaction formula at this time is expressed as follows.

Here, n is 2.7 to 5 and 0 ≦ k ≦ 4.3.

On the other hand, sodium hydroxide in the configuration of the present invention ( ) Is sodium aluminate ( Can be replaced with). The reaction formula at this time is expressed as follows.

Here, n is 2.7 to 5 and 0 ≦ k ≦ 4.3.

In the composition of the present invention as described above sodium silicate ( ) And sodium hydroxide ( ) Is sodium aluminum silicate ( Can be used in place of ) Is prepared as follows.

Sodium aluminum silicate described above ( ), The manufacturing process of sodium hydroxide ( ), Aluminum hydroxide ( ), Sodium silicate ( ) And water ( ) Are mixed at a ratio of 40 to 65: 31.5 to 50: 0.01 to 10.0: 0.5 to 30 wt%. At this time, sodium hydroxide ( ) Is sodium oxide ( Aluminum hydroxide (30-50%), ) Is aluminum oxide ( ), The concentration of 50-68%, sodium silicate ( ) For silicon oxide ( ), The concentration is 10 to 30%.

Meanwhile, as described above, sodium oxide ( Sodium hydroxide with a concentration of 30-50% ), Aluminum oxide ( Aluminum hydroxide with a concentration of 50-68% ), Silicon oxide ( Sodium silicate (10-30%) ) And water ( ) Was mixed at a ratio of 40 to 65: 31.5 to 50: 0.01 to 10.0: 0.5 to 30 wt%, and then reacted for 30 to 120 minutes under a temperature condition of 100 to 150 DEG C. Manufacture).

Sodium aluminum silicate prepared through the manufacturing process as described above ( ) Is aluminum oxide ( ) Concentration of 10-25%, sodium oxide ( ) Concentration of 10-25% and silicon oxide ( ) Concentration is 0.001 to 10%.

Next, sodium aluminum silicate prepared by the above process ( ) Shows a reaction formula for preparing sodium aluminum silicate ( ) Is expressed as

Here, n is 4 or less, and y≤4 and 1≤k≤2.

Sodium aluminum silicate as described above ( ) Manufacturing process can be summarized as follows. That is, sodium oxide ( Sodium hydroxide with a concentration of 30-50% 40 to 65 wt% aluminum oxide Aluminum hydroxide with a concentration of 50-68% 31.5-50 wt%, silicon oxide Sodium silicate (10-30%) ) 0.01 to 10.0 wt% and water ( ) 0.5-30 wt% was mixed and reacted for 30-120 minutes under the temperature condition of 100-150 ℃. ) Concentration of 10-25%, sodium oxide ( ) Concentration of 10-25% and silicon oxide ( Sodium silicate (concentration of 0.001-10%) Is prepared).

Sodium aluminum silicate as described above ( Aluminum hydroxide in the manufacturing process ) Is aluminum ( It can be used in place of another compound in the salt state, and sodium hydroxide ( ) Sodium salt ( Can be used in place of other compounds in the ) Also silicic acid ( It can be used in place of another compound in the salt state.

On the other hand, the production method of the flocculant for water treatment according to the present invention can be summarized as follows. That is, the flocculant for water treatment according to the present invention is aluminum oxide ( Aluminum hydroxide with a concentration of 40-68% Hydrochloric acid (15-28 wt%, concentration 25-35%) 50-75 wt% sulfuric acid (concentration 50-98%) ) 0.5 to 10 wt%, water ( Aluminum oxide prepared by reacting the mixture mixed at a ratio of 0.6 to 25 wt% for 5 to 20 hours under a temperature condition of 90 to 125 ℃ ( ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ) 46-75 wt%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10-25 wt%) Sodium silicate (5-40%) ) 0.01 to 10.0 wt% and water ( The aluminum oxide mixture was mixed and reacted at a rate corresponding to a rate gradient of 1,000 seconds under a temperature condition of 30 to 60 ° C. ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( High molecular weight polysilicate aluminum sulfate (Sulfate) that satisfies 0.001 to 10.0% ) Can be prepared.

The following is a low basic aluminum chloride sulfate { : Aluminum Chloro-Sulfate (hereinafter referred to as ACS)} and high-molecular weight polysilicate aluminum silicate sulfate { : PAHCSS)} is an embodiment for manufacturing.

Example 1

-Production of low basic ACS.

Aluminum oxide ( Moisture filter cake {Aluminum hydroxide ( )} 27.1 wt% hydrochloric acid with a concentration of 31.5% ( ) 61 wt% sulfuric acid (concentration 93.5%) ) 5.3 wt%, water ( After mixing at a ratio of 6.6 wt%, the reaction was performed for 12 hours under a temperature condition of 100 ° C. ) Concentration 13.4%, chloride ( ) 18%, sulfate ( ) 4.9% low basic aluminum chloride (ACS) was prepared.

Aluminum oxide prepared as in Example 1 described above ( ) Concentration 13.4%, chloride ( ) 18%, sulfate ( 4.9% of low basic aluminum chloride (ACS) results in aluminum oxide ( ) Concentration 10% or more, Basicity 50% or more, Chloride ( ) 11% or more, sulfate ( ) 2.5% or more, silicon oxide ( ) Is used to produce 0.2% polysilicate aluminum sulfate (PAHCSS).

Example 2

ACS of Example 1, sodium hydroxide ( ) And sodium silicate ( ) Reaction.

Aluminum oxide ( ) Concentration 13.4%, chloride ( ) 18%, sulfate ( 59.1 wt% of low basic aluminum chloride (ACS) with 4.9% sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10 wt% calcium carbonate ) 0.4 wt%, sodium silicate ( ) 1.5% and water ( ) Was mixed at a rate of 29 wt%, and then mixed and reacted at a rate corresponding to a rate gradient of 1,000 seconds under a temperature condition of 50 ° C. or less to prepare polysilicate aluminum sulfate (PAHCSS).

At this time, diluted sodium hydroxide ( ) And sodium silicate ( ) Solution is a low basic aluminum chloride (ACS) / calcium carbonate ( ) Is mixed under high shear stress (homo-mixing). In this reaction, aluminum oxide ( ) Concentration 10.5%, Basicity 50%, Chloride ( ) 12%, sulfate ( ) 2.9%, silicon oxide ( Polysilicon chloride aluminum sulfate (PAHCSS) of 0.1%) was prepared.

Example 3

-Production of low basic ACS.

Aluminum oxide ( Moisture filter cake {aluminum hydroxide () )} 23.7 wt% hydrochloric acid with a concentration of 31.5% ( 67.1 wt% sulfuric acid (concentration 93.5%) ) 4.1 wt%, water ( ) Was mixed at a ratio of 5.1 wt% and reacted for 12 hours at a temperature of 110 ° C. ) Concentration 13.4%, chloride ( ) 18%, sulfate ( ) 3.8% low basic aluminum chloride (ACS) was prepared.

Aluminum oxide prepared as in Example 3 described above ( ) Concentration 13.4%, chloride ( ) 18%, sulfate ( 3.8% of low basic aluminum chloride (ACS) results in aluminum oxide ( ) Concentration 10% or more, Basicity 70% or more, Chloride ( ) 9% or more, sulfate ( ) 1.5% or more, silicon oxide ( ) 0.1% polysilicate aluminum sulfate (PAHCSS).

Example 4

ACS of Example 3, sodium hydroxide ( ) And sodium silicate ( ) Reaction.

Aluminum oxide ( ) Concentration 13.4%, chloride ( ) 18%, sulfate ( 46.4 wt% of low basic aluminum chloride (ACS) 3.8%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 16.7 wt% calcium carbonate ) 2.4 wt%, sodium silicate ( ) 1.5% and water ( After mixing at a rate of 33 wt%, a high molecular weight polysilicate aluminum sulfate (PAHCSS) was prepared by mixing and reacting at a rate corresponding to a rate gradient of 1,000 seconds under a temperature condition of 50 ° C. or lower.

At this time, diluted sodium hydroxide ( ) And sodium silicate ( ) Solution is a low basic aluminum chloride (ACS) / calcium carbonate ( ) Is mixed under high shear stress (homo-mixing). In this reaction, aluminum oxide ( ) Concentration 10.5%, Basicity 79%, Chloride ( ) 10%, sulfate ( ) 1.7%, silicon oxide ( A high molecular weight polysilicate aluminum sulfate (PAHCSS) of 0.5% was prepared.

Example 5

First, hydrochloric acid with a concentration of 31.5% ( 83.6 wt% sulfuric acid (concentration 93.5%) ) 9.3 wt%, water ( After mixing at a ratio of 7.1 wt%, the temperature of the mixture was raised to a temperature of 75 ° C. At this point, the reaction was continued with an additional amount of hydrochloric acid ( ) Was added and reacted under a reaction temperature range of 75 to 90 ° C.

As described above, hydrochloric acid ( ), While the temperature of the reactor may drop during the additional supply, the temperature was supplied from the outside.

Meanwhile, hydrochloric acid ( After completing the additional supply of Moisture filter cake {aluminum hydroxide () )} Was mixed with 23.6 wt% of the mixed reaction to complete the reaction. At this time, hydrochloric acid ( ) And sulfuric acid ( ) And water ( Mixed reactant and aluminum hydroxide ( Because of the endothermic reaction of), the temperature is maintained between 90 and 125 ° C.

After the reaction as described above was carried out for 8 to 10 hours, aluminum oxide ( ) Concentration 12.5%, Basicity 8%, Chloride ( ) 21.8%, sulfate ( ) Low basic aluminum chloride (ACS) with 3.5% specification was prepared.

As described above, aluminum oxide ( ) Concentration 12.5%, Basicity 8%, Chloride ( ) 21.8%, sulfate ( After preparing a low basic aluminum chloride (ACS) having a specification of 3.5%, it was cooled to a temperature of 60 ℃, 46 wt% of a low basic aluminum chloride (ACS), sodium oxide ( Sodium hydroxide with a concentration of 20.2% 18.3 wt% silicon oxide Sodium silicate (28%) ) 2 wt% calcium carbonate ) 0.4 wt% ) And reacted with a mixture of 33.3 wt%. In this reaction, the non-viscous milky turbid liquid was gradually cleared within 24 hours to produce a finished product.

The product prepared as described above is a high molecular weight polysilicate aluminum sulfate (PAHCSS) object of the present invention. At this time, the specifications of the produced high molecular weight polysilicate aluminum sulfate (PAHCSS) is aluminum oxide ( ) Concentration 10.5%, Basicity 79%, Chloride ( ) 10%, sulfate ( ) 1.7%, silicon oxide ( ) 0.1%.

Aluminum oxide of the present invention prepared as described above ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0-5.0% and silicon oxide ( High molecular weight polysilicate aluminum sulfate (0.001 to 10.0%) ) Is the traditional aluminum ( ) And iron ( ) The problem of precipitation of mono- and low-molecular-weight or low-base products, which are disadvantages of salt-based inorganic coagulants, has been improved.The problem of precipitation is stable.

Moreover, the aluminum oxide according to the present invention ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0-5.0% and silicon oxide ( High molecular weight polysilicate aluminum sulfate (0.001 to 10.0%) ) Can prevent economic losses because sediment does not occur even during long-term storage.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

As described above, according to the present invention, conventional aluminum ( ) And iron ( By improving the problems of unstable mono- and low-molecular-weight or low-basicity products, which are disadvantages of salt-based inorganic coagulants, precipitation can be made. .

Another effect of the present invention is to improve the removal effect of organic matter in the water treatment by producing a polybasic aluminum sulfate sulfate (PAHCSS) as a water treatment agent flocculant by mixing an appropriate amount of low-basic aluminum chloride (ACS) and sodium hydroxide under appropriate conditions In addition, by increasing the size of the flocs (Floc) has the effect of improving the aggregation rate.

In addition, the present invention, in addition to the above-described effects by mixing a moderate amount of low-basic aluminum chloride (ACS) and sodium hydroxide under appropriate conditions to produce a polysilicate aluminum sulfate sulfate (PAHCSS) as a water treatment agent flocculant during long-term storage Even though the sediment is not generated, economic loss can be prevented.

Claims (18)

In the method of producing a flocculant for water treatment in which suspended particles suspended in sewage or sewage and waste water are flocculated by chemical treatment to form flocs, (A) Aluminum oxide ( Aluminum hydroxide with a concentration of 40-68% Hydrochloric acid (15-28 wt%, concentration 25-35%) 50-75 wt% sulfuric acid (concentration 50-98%) ) 0.5 to 10 wt%, water ( ) Mixing 0.6-25 wt%; (B) The mixture of step (a) is reacted for 5 to 20 hours under the temperature condition of 90 to 125 ℃ to obtain aluminum oxide ( ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less Preparing); (C) in step (b) aluminum oxide ( ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ) 46-75 wt%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10-25 wt%) Sodium silicate (5-40%) ) 0.01 to 10.0 wt% and water ( ) Mixing 15 to 35 wt%; And (D) The mixture of step (C) is mixed and reacted at a rate of 1,000 seconds under a temperature gradient of 30 to 60 DEG C. Method for producing a flocculant for water treatment, characterized in that it comprises a step of producing). The method of claim 1, wherein the step (c) comprises the low basic aluminum chloride sulfate ( ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( 4 wt% or less of calcium carbonate, based on a mixture of 15-35 wt% ) Are further mixed with a polysilicate aluminum chloride sulfate having a basic The manufacturing method of the flocculant for water treatment characterized by the above-mentioned. The method of claim 2, wherein the calcium carbonate ( ) Is sodium carbonate ( Method for producing a flocculant for water treatment, characterized in that can be used to replace. The method according to any one of claims 1 to 3, wherein the polysilicate silicate chloride ) Is aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) A method for producing a flocculant for water treatment, characterized by satisfying a condition of 0.001 to 10.0%. The method according to claim 4, wherein the aluminum hydroxide of step (a) ) Is aluminum ( A method for producing a flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 4, wherein the step (a) sulfuric acid ( ) Is sulfate ion ( A method for producing a flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 4, wherein the sodium silicate ( ) Is silicic acid ( A method for producing a flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 4, wherein the sodium hydroxide of step (c) ) Is sodium aluminate ( Method for producing a flocculant for water treatment, characterized in that can be used to replace. The method of claim 4, wherein the sodium silicate ( ) Or sodium hydroxide ( ) Is sodium aluminum silicate ( Method for producing a flocculant for water treatment, characterized in that can be used to replace. Aluminum oxide ( Aluminum hydroxide with a concentration of 40-68% Hydrochloric acid (15-28wt%, 25-35%) 50-75 wt% sulfuric acid (concentration 50-98%) ) 0.5 to 10 wt%, water ( Aluminum oxide prepared by reacting 0.6-25 wt% at a temperature of 90-125 ° C. for 5-20 hours. ) Is a low-basic aluminum chloride sulfate having a concentration of 9 to 14% and a basicity of 10% or less ) 46-75 wt%, sodium oxide ( Sodium hydroxide with a concentration of 15-40% 10-25 wt%) Sodium silicate (5-40%) ) 0.01 to 10.0 wt% and water ( A high molecular weight polysilicate silicate sulfate was mixed by reacting 15 to 35 wt% at a rate equivalent to 1,000 seconds under a temperature gradient of 30 to 60 ° C. A flocculant for water treatment prepared by). The method of claim 10, wherein the low basic aluminum chloride sulfate ( ) 46-75 wt%, sodium hydroxide ( 10-25 wt%) sodium silicate ( ) 0.01 to 10.0 wt% and water ( Calcium carbonate (for mixtures mixed at a ratio of 15 to 35 wt%) ) Is further mixed in a ratio of 4 wt% or less to a high molecular weight polysulfide aluminum sulfate having a basicity of 70% or more ( A flocculant for water treatment, characterized in that the) to be prepared. The method of claim 11, wherein the calcium carbonate ( ) Is sodium carbonate ( A flocculant for water treatment, which can be used in place of). The method according to any one of claims 10 to 12, wherein the polysilicate silicate chloride ) Is aluminum oxide ( ) 9-13% concentration, 50% or more basicity, chloride ( 9-14%, sulfate ) 1.0 to 5.0%, silicon oxide ( ) A flocculating agent for water treatment, characterized by satisfying the condition of 0.001 to 10.0%. The method of claim 13, wherein the aluminum hydroxide ( ) Is aluminum ( ) A flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 13, wherein the sulfuric acid ( ) Is sulfate ion ( ) A flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 13, wherein the sodium silicate ( ) Is silicic acid ( ) A flocculant for water treatment, which can be used in place of another compound in a salt state. The method of claim 13, wherein the sodium hydroxide ( ) Is sodium aluminate ( A flocculant for water treatment, which can be used in place of). The method of claim 13, wherein the sodium silicate ( ) Or sodium hydroxide ( Silver Sodium Silicate A flocculant for water treatment, which can be used in place of).