CN102167344A - Method of preparing water glass and sodium metasilicate nonahydrate by using waste liquid of alum slurry - Google Patents
Method of preparing water glass and sodium metasilicate nonahydrate by using waste liquid of alum slurry Download PDFInfo
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- CN102167344A CN102167344A CN 201010566612 CN201010566612A CN102167344A CN 102167344 A CN102167344 A CN 102167344A CN 201010566612 CN201010566612 CN 201010566612 CN 201010566612 A CN201010566612 A CN 201010566612A CN 102167344 A CN102167344 A CN 102167344A
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Abstract
The invention belongs to the technological field of inorganic chemical engineering three wastes treatment and comprehensive utilization, particularly relates to a method of preparing water glass and sodium metasilicate nonahydrate by using waste liquid of alum slurry. By the method, after water-soluble substance and acid-soluble substance are extracted from alum slurry, remaining waste is filtered, filter cake is reacted with sodium hydroxide solution under heating and pressurization to produce sodium silicate, which is cooled to be the water glass; then the water glass is placed into a reduced pressure distiller for reduced pressure distillation, when only nine crystal water molecules are left, the water glass is discharged for cooling crystallization and for crunching and packaging to obtain the sodium metasilicate nonahydrate. The method can not only dispose waste residues, thereby decreasing pollution of the waste residues to the environment, but also prepare valuable water glass and sodium metasilicate nonahydrate, in particular, the method has no secondary pollution. The method has remarkable social benefits and economic benefits, technology and production equipment are simple, so the invention provides a relatively practical processing and utilization method.
Description
Technical field
The present invention relates to make the improvement and the comprehensive utilization technique field of the alum pulp waste that alum produces, particularly a kind of method for preparing water glass and the inclined to one side silicon of nine water with the alum pulp waste.
Technical background
Alum claims potassium aluminium alum, arcanite and potassium alum again, and chemical formula is K
2SO
4Al
2(SO
4)
324H
2O or KAl (SO
4)
224H
2O.Alum is to contain the potassium magnesium sulfate of crystal water and the double salt of Tai-Ace S 150, and colourless octahedral crystal has sour and astringent taste; Density is 1.75, fusing point 92 degree; Soluble in water, when it is water-soluble, play hydrolysis reaction and generate the gluey precipitation of aluminium hydroxide; When it is heated, lose crystal water and form white powder abbreviation exsiccated alum.
Alum is widely used in industries such as chemical industry, food, daily use chemicals, water treatment, and China's alunite mineral products are abundant, and the alum ore deposit that economize in Zhejiang, Anhui etc. is well known.The alum ore can be obtained alum crystal after dipping, crystallization, the drying after calcining.But the production process of alum is discharged a large amount of alum slags (alum mud and alum slurry), and air storage throughout the year causes sour water loss contaminate environment.Therefore, the comprehensive utilization of alum mud and alum slurry has become alum industry urgent problem.
The alum slurry is the slurries of discharging when making alum, also is the bigger contaminating enterprises of three waste discharge in the inorganic chemical industry.Though a lot of enterprises of going together handle the improvement and the utilization of alum slurry, have occurred the phenomenon of secondary pollution after handling again.Administer and utilize the product category that processes of low grade again less, have a lot of elements and compound all not to take out.Alum pulp waste also of no use prepares the relevant report of the method for water glass and the inclined to one side silicon of nine water at present.
Summary of the invention
The invention provides and a kind ofly prepare the method for water glass and the inclined to one side silicon of nine water with the alum pulp waste, this method not only technology is simple, and can also make multiple value product when can effectively handle waste residue.
To achieve the above object, technical scheme of the present invention is:
A kind ofly prepare the method for water glass and the inclined to one side silicon of nine water, comprise being prepared as follows step with the alum pulp waste:
Steps A, the alum slurry hydrolytic decomposition pot of packing into is extracted wherein water-soluble substances and acid soluble material, only remaining silica filter cake after extracting fully;
Step B, remaining refuse after having extracted water-soluble substances and acidic substance in the steps A is filtered with first strainer;
Step C, send to deep processing with filtering gained filtrate among the step B;
Step D, drop into heating and pressurizing in the corrosion-resistant reactor with sodium hydroxide solution with pure mass ratio 1: 1.11～1.51, stir reaction generation water glass simultaneously slowly filtering the gained filter cake among the step B;
Step e, gained water glass among the step D is filtered down impurity burning or buried processing with second strainer at 1100 ± 2 ℃;
Step F, the filtrate of filtering gained in the step e is cooled off with first water cooler, obtain the water glass product;
Step G, the water glass of step F gained is sent into the underpressure distillation device carry out underpressure distillation, when distilling remaining nine of crystal water molecule, discharge again successively to wash to check the weight after dryings, drying and the pulverizing and be packaged to be the inclined to one side silicon product of nine water with second water cooler, washing and spin-drying machine, moisture eliminator and pulverizer.
Wherein, sodium hydroxide solution is that concentration of volume percent is 25%～34% solution among the described step B.
When filter cake and sodium hydroxide solution reacted in corrosion-resistant reactor among the described step B, the temperature in the corrosion-resistant reactor was 1300 ℃～1500 ℃, and pressure is 1000KPa～1500KPa.
Reaction principle of the present invention is:
SiO
2+2NaOH＝＝＝＝＝Na
2SiO
3·9H
2O+H
2O
The present invention mainly be with administer and utilize the alum slurry has extracted water-soluble substances and acid soluble material after filtration, the filter cake of gained and sodium hydroxide solution heat, compressive reaction, the generation water glass, water glass makes the water glass product through cooling; Then putting water glass into the underpressure distillation device carries out underpressure distillation, when distilling only remaining nine of crystal water molecule, ejects crystallisation by cooling, crushing packing obtains the non-hydrate sodium metasilicate product; The present invention can as clean as a pennyly gulp down waste residue, alleviates the pollution of waste residue to environment; Can make valuable water glass and nine water inclined to one side silicon product, especially without any secondary pollution again, not only have remarkable social benefit and economic benefit, and technology and production unit are simple, be a kind of relatively actual processing and utilize method.
Description of drawings
Fig. 1 is the process flow sheet for preparing the method for water glass and the inclined to one side silicon of nine water with the alum pulp waste;
Wherein:
The 1-hydrolytic decomposition pot, 2-first strainer, 3-corrosion-resistant reactor, 4-second strainer, 5-first water cooler, 6-water glass product, 7-underpressure distillation device, 8-second water cooler, 9-washing and spin-drying machine, 10-moisture eliminator, 11-pulverizer, the inclined to one side silicon product of 12-nine water.
Concrete embodiment
Embodiment 1
A kind ofly prepare the method for water glass and the inclined to one side silicon of nine water, comprise being prepared as follows step with the alum pulp waste:
Steps A, with alum slurry water-soluble substances and the acid soluble material that hydrolytic decomposition pot 1 extracts wherein of packing into, only remaining silica filter cake after extracting fully; Its content is because extract the high material of a lot of content, so remaining silicon-dioxide is up to more than 90%;
Step B, remaining refuse after having extracted water-soluble substances and acidic substance in the steps A is filtered with first strainer 2;
Step C, send to deep processing with filtering gained filtrate among the step B;
Step D, drop into 3 li heating and pressurizing of corrosion-resistant reactor with sodium hydroxide solution (concentration of volume percent is 25%) at 1: 1.11 with pure mass ratio with filtering gained filter cake (by the calculating of 500Kg pure silicon dioxide) among the step B, slowly stir simultaneously, reaction generates water glass; Temperature in the described corrosion-resistant reactor 3 is 1300 ℃, and pressure is 1000KPa;
Step e, gained water glass among the step D is filtered down impurity burning or buried processing with second strainer 4 at 1100 ± 2 ℃;
Step F, the filtrate of filtering gained in the step e is cooled off with first water cooler 5, obtain 847.07Kg water glass product 6;
Step G, the water glass of step F gained is sent into underpressure distillation device 7 carry out underpressure distillation, when distilling remaining nine of crystal water molecule, discharge again successively to wash to check the weight after dryings, drying and the pulverizing and be packaged to be the inclined to one side silicon product 12 of 1971.23Kg nine water with second water cooler 8, washing and spin-drying machine 9, moisture eliminator 10 and pulverizer 11.
A kind ofly prepare the method for water glass and the inclined to one side silicon of nine water, comprise being prepared as follows step with the alum pulp waste:
Steps A, with alum slurry water-soluble substances and the acid soluble material that hydrolytic decomposition pot 1 extracts wherein of packing into, only remaining silica filter cake after extracting fully; Its content is because extract the high material of a lot of content, so remaining silicon-dioxide is up to more than 90%;
Step B, remaining refuse after having extracted water-soluble substances and acidic substance in the steps A is filtered with first strainer 2;
Step C, send to deep processing with filtering gained filtrate among the step B;
Step D, drop into 3 li heating and pressurizing of corrosion-resistant reactor with sodium hydroxide solution (concentration of volume percent is 30%) at 1: 1.31 with pure mass ratio with filtering gained filter cake (by the calculating of 500Kg pure silicon dioxide) among the step B, slowly stir simultaneously, reaction generates water glass; Temperature in the described corrosion-resistant reactor 3 is 1400 ℃, and pressure is 1200KPa;
Step e, gained water glass among the step D is filtered down impurity burning or buried processing with second strainer 4 at 1100 ± 2 ℃;
Step F, the filtrate of filtering gained in the step e is cooled off with first water cooler 5, obtain 999.70Kg water glass product 6;
Step G, the water glass of step F gained is sent into underpressure distillation device 7 carry out underpressure distillation, when distilling remaining nine of crystal water molecule, discharge again successively to wash to check the weight after dryings, drying and the pulverizing and be packaged to be the inclined to one side silicon product 12 of 2326.40Kg nine water with second water cooler 8, washing and spin-drying machine 9, moisture eliminator 10 and pulverizer 11.
Embodiment 3
A kind ofly prepare the method for water glass and the inclined to one side silicon of nine water, comprise being prepared as follows step with the alum pulp waste:
Steps A, with alum slurry water-soluble substances and the acid soluble material that hydrolytic decomposition pot 1 extracts wherein of packing into, only remaining silica filter cake after extracting fully; Its content is because extract the high material of a lot of content, so remaining silicon-dioxide is up to more than 90%;
Step B, remaining refuse after having extracted water-soluble substances and acidic substance in the steps A is filtered with first strainer 2;
Step C, send to deep processing with filtering gained filtrate among the step B;
Step D, drop into 3 li heating and pressurizing of corrosion-resistant reactor with sodium hydroxide solution (concentration of volume percent is 34%) at 1: 1.51 with pure mass ratio with filtering gained filter cake (by the calculating of 500Kg pure silicon dioxide) among the step B, slowly stir simultaneously, reaction generates water glass; Temperature in the described corrosion-resistant reactor 3 is 1500 ℃, and pressure is 1500KPa;
Step e, gained water glass among the step D is filtered down impurity burning or buried processing with second strainer 4 at 1100 ± 2 ℃;
Step F, the filtrate of filtering gained in the step e is cooled off with first water cooler 5, obtain 1175.22Kg water glass product 6;
Step G, the water glass of step F gained is sent into underpressure distillation device 7 carry out underpressure distillation, when distilling remaining nine of crystal water molecule, discharge again successively to wash to check the weight after dryings, drying and the pulverizing and be packaged to be the inclined to one side silicon product 12 of 2734.86Kg nine water with second water cooler 8, washing and spin-drying machine 9, moisture eliminator 10 and pulverizer 11.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (3)
1. one kind prepares the method for water glass and the inclined to one side silicon of nine water with the alum pulp waste, it is characterized in that, comprises being prepared as follows step:
Steps A, the alum slurry hydrolytic decomposition pot (1) of packing into is extracted wherein water-soluble substances and acid soluble material;
Step B, remaining refuse after having extracted water-soluble substances and acidic substance in the steps A is filtered with first strainer (2);
Step C, send to deep processing with filtering gained filtrate among the step B;
Step D, drop into corrosion-resistant reactor (3) lining heating and pressurizing with sodium hydroxide solution with pure mass ratio 1: 1.11～1.51, stir reaction generation water glass simultaneously slowly filtering the gained filter cake among the step B;
Step e, gained water glass among the step D is filtered down impurity burning or buried processing with second strainer (4) at 1100 ± 2 ℃;
Step F, the filtrate of filtering gained in the step e is cooled off with first water cooler (5), obtain water glass product (6);
Step G, the water glass of step F gained is sent into underpressure distillation device (7) carry out underpressure distillation, when distilling remaining nine of crystal water molecule, discharge to use second water cooler (8), washing and spin-drying machine (9), moisture eliminator (10) and pulverizer (11) to wash again successively to check the weight after dryings, drying and the pulverizing and be packaged to be the inclined to one side silicon products of nine water (12).
2. according to claim 1ly prepare the method for water glass and the inclined to one side silicon of nine water, it is characterized in that sodium hydroxide solution is that concentration of volume percent is 25%～34% solution among the described step B with the alum pulp waste.
3. the method for preparing water glass and the inclined to one side silicon of nine water with the alum pulp waste according to claim 1, it is characterized in that, filter cake and sodium hydroxide solution are at corrosion-resistant reactor (3) when react the lining among the described step B, temperature in the corrosion-resistant reactor (3) is 1300 ℃～1500 ℃, and pressure is 1000KPa～1500KPa.
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|---|---|---|---|
| CN 201010566612 CN102167344A (en) | 2010-11-30 | 2010-11-30 | Method of preparing water glass and sodium metasilicate nonahydrate by using waste liquid of alum slurry |
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|---|---|---|---|
| CN 201010566612 CN102167344A (en) | 2010-11-30 | 2010-11-30 | Method of preparing water glass and sodium metasilicate nonahydrate by using waste liquid of alum slurry |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720608A (en) * | 1971-09-08 | 1973-03-13 | Bonham Grant & Brundage Ltd | Method and apparatus for conditioning and disposing of alum sludge from water treatment |
| CN1044634A (en) * | 1989-01-31 | 1990-08-15 | 亨克尔两合股份公司 | The method of hydrothermal producting solution of solidum silicate at high ratio of Si: Na |
-
2010
- 2010-11-30 CN CN 201010566612 patent/CN102167344A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720608A (en) * | 1971-09-08 | 1973-03-13 | Bonham Grant & Brundage Ltd | Method and apparatus for conditioning and disposing of alum sludge from water treatment |
| CN1044634A (en) * | 1989-01-31 | 1990-08-15 | 亨克尔两合股份公司 | The method of hydrothermal producting solution of solidum silicate at high ratio of Si: Na |
Non-Patent Citations (2)
| Title |
|---|
| 《化工环保》 19880430 连加松 综合利用矾浆制氢氧化铝和水泥 87-90 1-3 第8卷, 第2期 * |
| 《湖南化工》 19900131 蒋浩 矾土废渣制水玻璃的探讨 51-52 1-3 , 第1期 * |
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Address after: 523000, room five, building 508, Jinhai building, Dongcheng District Tong Road, Dongguan, Guangdong Applicant after: Wang Jiaxing Address before: Wushi Village Primary School in Dongguan city of Dongcheng District province Guangdong road 523000 Lane 1 No. 6 main mountain Applicant before: Wang Jiaxing |
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Application publication date: 20110831 |