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Method for preparing poly-silicic acid iron sulfate

A technology of polysilicate ferric sulfate and polysilicate, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unsuitable gas field water treatment, poor stability, low flocculation effect, etc., and achieve excellent water purification performance and production Low cost and good product quality

Inactive Publication Date: 2010-10-06
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerized iron product has poor stability, and it turns into sediment within a few hours to a week after polymerization, and the flocculation effect is low, so it is not suitable for the treatment of gas field water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Preparation of ferric sulfate solution

[0022] Weigh 200g of iron ore and grind it into -200mesh iron ore powder, put it into a muffler furnace for calcination at 800°C for 2h, and cool it for later use. Measure 100ml of sulfuric acid solution with a mass percentage concentration of 40% in a 500ml four-neck flask with a stirring device, weigh 8.17g of the aforementioned spare iron ore powder, add it to the sulfuric acid solution, and react at 100°C for 2h After cooling and filtering, a solution containing iron sulfate can be obtained, wherein the concentration of Fe2(SO4)3 is 0.84mol / L.

[0023] Step 2: Preparation of polymeric silicic acid

[0024] At room temperature, take the mass percent concentration of 20% H 2 SO 4 100ml of the solution was placed in a beaker for later use. Take industrial water glass sample (modulus is 2.7), prepare SiO2 2 2% Na 2 SiO 3 The solution is ready for use. Measure 2% Na 2 SiO 3 The solution was slowly added to the pr...

Embodiment 2

[0028] Step 1: the preparation of ferric sulfate solution is identical with the step 1 of embodiment 1;

[0029] Step 2: Preparation of polymeric silicic acid

[0030] At room temperature, take the mass percent concentration of 20% H 2 SO 4 100ml of the solution was placed in a beaker for later use. Take industrial water glass sample (modulus is 2.7), prepare SiO2 2 2% Na 2 SiO 3 The solution is ready for use. Measure 2% Na 2 SiO 3 The solution was slowly added to the prepared 100ml sulfuric acid solution with a concentration of 20% by mass, and vigorously stirred while adding, so that the addition was stopped when the pH value reached 3, and after activation for 20 minutes, a polysilicate solution was obtained.

[0031] Step 3: Preparation of polysilicate ferric sulfate

[0032] Measure 200ml of polysilicic acid obtained from step 2 and 151ml of ferric sulfate solution obtained from step 1 and mix them in a beaker so that the molar ratio of iron to silicon is 2:1. Af...

Embodiment 3

[0034] Step 1: Preparation of ferric sulfate solution

[0035] Referring to step one in Example 1;

[0036] Step 2: Preparation of polymeric silicic acid

[0037] At room temperature, take the mass percent concentration of 20% H 2 SO 4 100ml of the solution was placed in a beaker for later use. Take industrial water glass sample (modulus is 2.7), prepare SiO2 2 3% Na 2 SiO 3 The solution is ready for use. Measure 3% Na 2 SiO 3 The solution was slowly added to the prepared 100ml sulfuric acid solution with a concentration of 20% by mass, and vigorously stirred while adding, so that the addition was stopped when the pH value reached 3, and after activating for 10 minutes, a polysilicic acid solution was obtained.

[0038] Step 3: Preparation of polysilicate ferric sulfate

[0039] Measure 200ml of polysilicic acid obtained from step 2 and 227ml of ferric sulfate solution obtained from step 1 and mix them in a beaker so that the molar ratio of iron to silicon is 2:1. Af...

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Abstract

The invention discloses a preparation method of polymeric ferric silicate sulfate, which includes the steps of the preparation of ferric sulfate solution, the preparation of polysilicic acid, and the preparation technology of polymeric ferric silicate sulfate. Iron ore is used as the raw material to prepare a new generation of good quality water purifying agent polymeric ferric silicate sulfate which is a composite inorganic polymeric flocculant that has the characteristics of malysites and silicates and has the advantages of strong coagulability, large alum floc, and quick sedimentation, so the composite inorganic polymeric flocculant is in particular suitable for the treatment of gas field water, and has better water purification property and wide application range. The flocculant of the invention is added in the gas field water in the east of Sichuan, the better flocculating effect is achieved. The preparation method of the invention not only provides a feasible path for the comprehensive utilization of the iron ore, but also provides a technological route with low raw material for the flocculant production, thereby the purpose of treating the waste by the waste is achieved, and better economic benefit, social benefit, and environmental benefit are obtained.

Description

technical field [0001] The invention belongs to the technical field of flocculant preparation, and in particular relates to a preparation method of polysilicate ferric sulfate flocculant. Background technique [0002] Since the application of flocculants in water treatment in my country in the late 1960s, inorganic flocculants have always dominated the market due to their low toxicity, low cost, and relatively simple preparation methods. Initially, aluminum sulfate and chlorine were mainly used. The first generation of inorganic salts such as aluminum chloride and ferric chloride. In the 1980s, the second-generation inorganic flocculants such as PAC, PFC, and PFS were successively developed and introduced. [0003] The advantage of inorganic flocculants is that it has better flocculation effect than traditional inorganic salt flocculants, and is cheaper than organic polymer flocculants. However, in terms of morphology, degree of polymerization and corresponding coagulation-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 刘清才魏春梅董凌燕温良英黎辉款陈登福
Owner CHONGQING UNIV
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