CN101786703A - Iron-based compound water treatment agent FPFS-1 and preparation method thereof - Google Patents

Abstract

The invention discloses an iron-based compound water treatment agent FPFS-1 and a preparation method thereof. The preparation method comprises the following steps: dissolving green copperas with water, adds sulphuric acid and a catalyst into the mixture for reaction to make Fe2+ completely oxidized and polymerized to form inorganic polymer compound liquid polymeric ferric sulfate, wherein the reaction temperature is room temperature, the reaction time is between 0.5 and 4.0 hours, and the material weight ratio of ferrous sulfate heptahydrate to the sulphuric acid to the catalyst is 100:4-20:3-10; and then adding an organic polymer compound into the obtained liquid polymeric ferric sulfate for compounding to form a colloidal FPFS-1 product of the invention. Tests show that the total iron accounts for 11 to 13 mass percent of the product, the basicity of the product is between 12 and 16 percent and the reducing substance (taking Fe2+ as a reference) accounts for less than 0.005 mass percent of the product. The iron-based compound water treatment agent FPFS-1 obviously improves the flocculation performance, has rapid sedimentation and clear water in the water treatment process, has good sediment filter performance, has no iron ion migration and has the unique characteristics of removing COD, BOD and chroma and deodorizing.

Description

Iron-based compound water treatment agent FPFS-1 and preparation method

[technical field]

The present invention relates to iron-based compound water treatment agent FPFS-1 and preparation method.

[background technology]

At present, the water conditioner on the market is mainly based on aluminium based flocculating agent kind.In recent years, lot of domestic and foreign discovers that aluminium is a kind of chronic poisonous substance.Source water in the waterworks after handling with aluminum salt flocculant, aluminium content in the output water increases considerably, and wherein considerable aluminium is easily to be absorbed by the body and bonded aluminium, aluminium in the tap water is big to the aluminium in other source of hazard ratio of human body, after it enters human body, can in some tissues and organ, put aside, cause multiple disease.Can check neuronic conduction after aluminium is put aside in nervus centralis, man memory power is gone down or lose, cause diseases such as senile dementia; Aluminium easily replaces calcium and enters in the sclerotin, causes that osteoporosis transforms distortion; Make renal function generation pathology, as renal function imbalance, renal failure and uremia; Make blood and cardiovascular generation pathology; Aluminium has cytogenetic toxicity, and somatocyte and sexual cell are had mutagenesis.

The use of aluminium salt in water can cause the secondary pollution of aluminium, and makes water band astringent taste, influence water quality, and the muriate flocculation agent of aluminium lures generation the compound of cancer teratogenesis in water treatment procedure.In the drinking water standard as American-European countries's formulation the content of aluminium has been done strict restriction abroad.China has put into effect Drinking Water 2001 hygienic practices June calendar year 2001, has wherein clearly stipulated the content≤0.2mg/L of aluminium.2007, the National Standards Commission and the Ministry of Health united and have issued " drinking water sanitary standard " (GB5749-2006) mandatory national standard, in enforcement on July 1 in 2007.This be over 21 years first to 1985 issue " drinking water sanitary standard " (GB5749-85) revise, set quota increases to 106 by 35 of primary standard.

Though both at home and abroad the research to poly-iron originates in the eighties, up to the present main products or bodied ferric sulfate, because the product use properties is not good, Fe ²⁺Transform not exclusively, influence treatment effect, production technique and technical reason cause product that limitation is arranged in addition, and substitution of Al is a product fully.

[summary of the invention]

The present invention is to provide iron-based compound water treatment agent FPFS-1 and preparation method, iron-based compound water treatment agent FPFS-1 of the present invention is represented with formula (1):

N in the formula ₁+ n ₂＜3,

R is a polyacrylamide, and molecular weight is 2,500,000～2,400 ten thousand.

Preparation method's concrete operations of iron-based compound water treatment agent FPFS-1 of the present invention are as follows: ferrous sulfate through water dissolution, is added sulfuric acid, add catalyst reaction, make Fe ²⁺All oxidations, polymerization form inorganic macromolecule compound liquid polymeric ferric sulfate; Temperature of reaction is a room temperature, and the reaction times is 0.5～4.0 hour; The weight of material proportioning is an iron vitriol: sulfuric acid: catalyzer=100: 4～20: 3～10, and then, in the liquid polymeric ferric sulfate that obtains, add organic high molecular compound and carry out compoundly, form gelationus FPFS-1 product of the present invention.After testing, the mass percent of the full iron of product is 11%～13%, and basicity is 12%～16%, and reducing substances is (with Fe ²⁺Meter) mass percent＜0.005%, combined temp is a room temperature, and be 1～10 hour recombination time, and the weight of material proportioning is an iron vitriol: organic high molecular compound=100: 0.1～3.4.Catalyzer of the present invention is any one in the oxymuriate, and oxymuriate mainly is the oxymuriate of potassium, sodium, calcium, magnesium, and organic high molecular compound is the R in the product formula (1), and promptly molecular weight is 2,500,000～2,400 ten thousand polyacrylamide.

The result is as follows after testing for FPFS-1 type product:

Project	The FPFS-1 product
		Density/g/cm 3(20℃)	??1.60
Massfraction/the % of full iron	??12.85
		Reducing substances is (with Fe 2+Meter) massfraction/%	??0.005
Basicity/%	??12.6
		Massfraction/the % of insolubles	??0.032
PH (1% aqueous solution)	??2.56
		Massfraction/the % of cadmium (Cd)	??0.0001
Massfraction/the % of mercury (Hg)	??0.00001
		Massfraction/the % of chromium [Cr (VI)]	??0.00001
Massfraction/the % of arsenic (As)	??0.00005
		Massfraction/the % of plumbous (Pb)	??0.0002
??1 #Massfraction/the % of organic high molecular compound	??1.0

FPFS-1 product of the present invention is a kind of water treatment flocculant chemical of novel, efficient, environment-friendly type, is the brown glue, is a kind of inorganic-organic composite type macromolecular compound that contains high price iron, and very easily dissolving forms the aqueous solution, wherein Fe in water ³⁺Very strong hydrolysis-polymerization-precipitation trend is arranged.In the aqueous solution, can produce multiple high price and multinuclear complexing ion after the hydrolysis.

FPFS-1 product of the present invention has following characteristics:

1.. in the inorganic macromolecule compound bodied ferric sulfate, introduce negatively charged ion and organic high molecular compound;

2.. iron level height, basicity height, the product of iron content 13～14%, basicity be up to 16.5%, i.e. polymerization degree height;

3.. detrimental impurity is low, and is safe.Mercury, chromium content are 0.00001%, and arsenic content is less than 0.00005%, lead content 0.0002%, cadmium content 0.0001%; Do not contain nitrate and nitrite, thereby can use, and domestic most of product can only be used for wastewater treatment at water supply industry;

4.. good stability, wide accommodation, using the pH value scope is 4～11, is adapted to the source water and the trade effluent of high, medium and low turbidity, sewage disposal.Product is deposited more than 1 year also not can layering, sediment-free;

5.. the product good water solubility, easy to use.The user of all domestic present use inorganic flocculating agents need not the miscellaneous equipment input, can carry out substituting of product fully.Do not need any outer adding assistant, do not change former its effect of water treatment technological process and significantly be better than domestic widely used polymerize aluminum chloride and polyaluminum sulfate iron product at present with kind.

[embodiment]

The compound of bodied ferric sulfate and organic high molecular compound is key point and difficult point place.For this reason, we have done a large amount of work, wherein constantly carry out the jar test of lab scale research and product flocculating effect repeatedly around the water treatment effect of its recombining process and compound product thereof.Through updating and perfect, last, we have filtered out molecular weight from tens kinds of Drinking Water type organic high molecular compounds be 2,500,000～2,400 ten thousand polyacrylamide organic high molecular compound.It can be compatible well with bodied ferric sulfate compound, and the gel-like prod water treatment flocculating effect that obtains simultaneously is very obvious.Through comparing test with products such as bodied ferric sulfate, polymerize aluminum chlorides, the water treatment effect is best.Through Infrared spectroscopy, its structure is different from bodied ferric sulfate.It is a kind of new type compound product of new structure.From water treatment effect and product cost two aspect overall equilbriums.We have carried out the consumption test of organic high molecular compound again, have determined the overall equilbrium point of its consumption at last.

Example 1:

In conversion unit, add 42 kilograms in water, start stirring.Slowly add 5 kilograms of the vitriol oils, add 100 kilograms of iron vitriols again, add 4 kilograms in Potcrate simultaneously.Oxypolymerization at room temperature 2 hours adds molecular weight and is 0.21 kilogram of 5,000,000 polyacrylamide, continues compound 3 hours, obtains the gelationus FPFS-1 product of brown.151 kilograms of product weights.

Example 2:

In conversion unit, add 50 kilograms in water, start stirring.Slowly add 15 kilograms of the vitriol oils, add 150 kilograms of iron vitriols again, add magnesium chlorate 9.5 simultaneously.Oxypolymerization at room temperature 2 hours, 1.2 kilograms of the polyacrylamides of adding molecular weight 1,200 10000 continued compound 3 hours, obtained the gelationus FPFS-1 product of brown.225 kilograms of product weights.

Example 3:

In conversion unit, add 26 kilograms in water, start stirring.Slowly add 24 kilograms of the vitriol oils, add the iron vitriol 120 kg again, add 10 kilograms of calcium chlorates simultaneously.Oxypolymerization at room temperature 2 hours adds molecular weight and is 0.7 kilogram of 2,400 ten thousand polyacrylamide, continues compound 4 hours, obtains the gelationus FPFS-1 product of brown.180 kilograms of product weights.

Example 4:

In conversion unit, add 30 kilograms in water, start stirring.Slowly add 21 kilograms of the vitriol oils, add 140 kilograms of iron vitriols again, add 14 kilograms of sodium chlorate simultaneously.Oxypolymerization at room temperature 2 hours adds molecular weight and is 4 kilograms of 1,000 ten thousand polyacrylamides, continues compound 6 hours, obtains the gelationus FPFS-1 product of brown.210 kilograms of product weights.

Claims (4)

1. iron-based compound water treatment agent FPFS-1 is characterized in that: iron-based compound water treatment agent FPFS-1 is with formula (1) expression:

$\left({\mathrm{Fe}}_2{\left(\mathrm{OH}\right)}_{n_1}{\mathrm{Cl}}_{n_2}{\left({\mathrm{SO}}_4\right)}_{3-}\frac{n_1+n_2}{2}\right)m\·R---\left(1\right)$

N in the formula ₁+ n ₂＜3,

R is a polyacrylamide, and molecular weight is 2,500,000～2,400 ten thousand;

Be a kind of gelationus inorganic-the organic composite type product, except that the component that contains bodied ferric sulfate, also contain 0.3～1.0% organic high molecular compound in its component.

2. iron-based compound water treatment agent FPFS-1 preparation method according to claim 1, it is characterized in that: with ferrous sulfate through water dissolution, add sulfuric acid, add catalyst reaction, make the whole oxidations of Fe2+, polymerization form inorganic macromolecule compound liquid polymeric ferric sulfate; Temperature of reaction is a room temperature, and the reaction times is 0.5～4.0 hour; The weight of material proportioning is an iron vitriol: sulfuric acid: catalyzer=100: 4～20: 3～10, then, adding organic high molecular compound in the liquid polymeric ferric sulfate that obtains carries out compound, combined temp is a room temperature, be 1～10 hour recombination time, the weight of material proportioning is an iron vitriol: organic high molecular compound=100: 0.1～3.4 obtain the gelationus FPFS-1 product of brown at last.

3. iron-based compound water treatment agent FPFS-1 preparation method according to claim 2, it is characterized in that: described catalyzer is any one in the oxymuriate, oxymuriate mainly is the oxymuriate of potassium, sodium, calcium, magnesium, described organic high molecular compound is the R in the formula (1), and promptly molecular weight is 2,500,000～2,400 ten thousand polyacrylamide.

4. iron-based compound water treatment agent FPFS-1 preparation method according to claim 2, it is characterized in that: the mass percent of the full iron of FPFS-1 product is 11%～13%, basicity is 12%～16%, in mass percent＜0.005% of Fe2+ reducing substances.