CN1262486C - Production method of printing and dyeing wastewater coagulate decolourizer - Google Patents
Production method of printing and dyeing wastewater coagulate decolourizer Download PDFInfo
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- CN1262486C CN1262486C CN 200310111769 CN200310111769A CN1262486C CN 1262486 C CN1262486 C CN 1262486C CN 200310111769 CN200310111769 CN 200310111769 CN 200310111769 A CN200310111769 A CN 200310111769A CN 1262486 C CN1262486 C CN 1262486C
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Abstract
The present invention relates to a treating technology of waste water in printing and dyeing industry, and is a method for producing a coagulating decolouring agent of printing and dyeing waste water. The decolouring agent is prepared by that the present invention uses cheap carbamide parts to replace expensive dicyandiamide, and dicyandiamide, carbamide, formaldehyde and ammonium chloride are concentrated under a certain condition by adopting a technology of a one-step method. The present invention has the advantages of simple technological equipment, cheap raw material, little investment and low cost; coagulating decolouring agents produced by the present invention can be used for waste water treatment in dye industry, printing and dyeing industry, etc. with the decoloring rate of 99 %.
Description
Technical field
The present invention relates to the treatment technology of printing and dyeing industrial waste water, is a kind of production method of coagulation decolourant for printing and dyeing waste water.
Background technology
Dyeing waste water is a trade effluent that the class water yield is big, colourity is high, alkalescence is strong, water quality is complicated, the top priority of handling such waste water is decolouring, but is and ferric flocculant that decolorizing effect is not good enough with conventional aluminium, particularly, almost powerless for hydrophilic active dye wastewater.
Dyhard RU 100-formaldehyde condensation products is used as a kind of dyeing and printing auxiliary at first, and the Japanese had found its coagulation decoloration performance afterwards, and has applied for patent (the clear 51-29116 of Japanese Patent).People such as nineteen ninety-five Lin Feng improve Japanese Patent, and have applied for Chinese patent (95101739.X).This Dyhard RU 100 is a coagulate decolourant decoloration performance brilliance, applicable to various waste water from dyestuff.But, be difficult to apply because Dyhard RU 100 costs an arm and a leg and makes its cost higher.
Summary of the invention
Purpose of the present invention, being to provide a kind of raw material of cheapness---urea partly substitutes expensive Dyhard RU 100, under the situation that does not have obviously to descend at decoloration performance, can make cost descend 20～30%, be that coagulate decolourant has wide application prospect thereby make Dyhard RU 100.
The production method of coagulation decolourant for printing and dyeing waste water of the present invention is: adopt one-step technology with Dyhard RU 100, urea, formaldehyde, ammonium chloride by mass ratio 20～50%, 5～25%, 10～40%, 25～60% disposable joining in the reactor, stirring mixes it, and slowly heating; When temperature was raised to 40～60 ℃, polycondensation began, and stopped heating; Exothermic heat of reaction can make temperature rise to 70～90 ℃, when treating that temperature drops to 40～60 ℃, begins heat tracing again 1～5 hour, promptly gets this product after allowing it naturally cool to room temperature then.
Embodiment
Method for making embodiment
With 910kg Dyhard RU 100,90kg urea, 1800kg formaldehyde, 1200kg ammonium chloride is disposable joins in the reactor, stirs and is warming up to 40 ℃, stops heating; Treat that temperature crosses about 70 ℃ and when dropping to 40 ℃ of peak, began heat tracing again 5 hours, promptly get product.
With 833kg Dyhard RU 100,167kg urea, 1100kg formaldehyde, 1800kg ammonium chloride is disposable joins in the reactor, stirs and is warming up to 50 ℃, stops heating; The question response heat release makes temperature cross about 80 ℃ and drop to 50 ℃ of peak, begins heat tracing again 3 hours, promptly gets product.
With 666kg Dyhard RU 100,333kg urea, 1600kg formaldehyde, 1300kg ammonium chloride is disposable joins in the reactor, stirs and is warming up to 60 ℃, stops heating; The question response heat release makes temperature cross about 90 ℃ and drop to 60 ℃ of peak, begins heat tracing again 1 hour, promptly gets product.
Claims (1)
1. the production method of a coagulation decolourant for printing and dyeing waste water, it is characterized in that: adopt one-step technology that Dyhard RU 100, urea, formaldehyde, ammonium chloride are joined in the reactor by mass ratio 20～50%, 5～25%, 10～40%, 25～60%, stirring mixes it, and slowly heating; When temperature was raised to 40～60 ℃, polycondensation began, and stopped heating; Exothermic heat of reaction can make temperature rise to 70～90 ℃, when treating that temperature drops to 40～60 ℃, begins heat tracing again 1～5 hour, promptly gets this product after allowing it naturally cool to room temperature then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310111769 CN1262486C (en) | 2003-10-15 | 2003-10-15 | Production method of printing and dyeing wastewater coagulate decolourizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310111769 CN1262486C (en) | 2003-10-15 | 2003-10-15 | Production method of printing and dyeing wastewater coagulate decolourizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1607185A CN1607185A (en) | 2005-04-20 |
| CN1262486C true CN1262486C (en) | 2006-07-05 |
Family
ID=34759450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310111769 Expired - Fee Related CN1262486C (en) | 2003-10-15 | 2003-10-15 | Production method of printing and dyeing wastewater coagulate decolourizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262486C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935094B (en) * | 2010-08-25 | 2012-02-29 | 常州大学 | Method for preparing decoloring flocculant of reactive dye waste water |
| CN102515331B (en) * | 2011-11-22 | 2013-08-07 | 广州博芳环保科技有限公司 | Preparation method of dosage form flocculation decoloring agent |
| CN103058340B (en) * | 2013-01-30 | 2014-04-02 | 南昌印钞有限公司 | Flocculation treatment method for waste liquid of gravure wiping plate of centrifuge |
| CN103172158A (en) * | 2013-03-18 | 2013-06-26 | 绍兴伊诺环保科技有限公司 | Preparation method of coagulation decolorant for reusing treatment of dyeing waste water |
| CN104004151B (en) * | 2014-03-31 | 2016-08-17 | 广州大正新材料科技有限公司 | A kind of preparation method and applications of dicandiamide-formaldehyde polymer |
| CN104016462B (en) * | 2014-06-17 | 2015-11-04 | 天津大学 | A kind of preparation method of reuse water discoloring agent |
| CN106927548B (en) * | 2015-12-30 | 2020-10-27 | 上海丰远环保科技有限公司 | Composite decoloring coagulant, preparation method and decoloring method thereof |
| CN107720843A (en) * | 2017-10-31 | 2018-02-23 | 江苏工程职业技术学院 | A kind of synthesis technique of reactive dyed wastewater high-efficiency decolorant |
-
2003
- 2003-10-15 CN CN 200310111769 patent/CN1262486C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1607185A (en) | 2005-04-20 |
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