CN1060142C - Preparation and application of high performance decolourizing flocculent - Google Patents
Preparation and application of high performance decolourizing flocculent Download PDFInfo
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- CN1060142C CN1060142C CN 95101739 CN95101739A CN1060142C CN 1060142 C CN1060142 C CN 1060142C CN 95101739 CN95101739 CN 95101739 CN 95101739 A CN95101739 A CN 95101739A CN 1060142 C CN1060142 C CN 1060142C
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- formaldehyde
- dyhard
- decolourizing
- condensation
- ammonium chloride
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Abstract
The present invention relates to a technology for treating industrial water, particularly to a preparing method and an application of a decolourizing flocculant with high efficiency. A one-step condensation technology in the prior art for decolourizing dicyandiamide formaldehyde polycondensate in a flocculant is improved into a two-step condensation technology, so that the technology has the advantages of stable technological process and easy process control. Through the selection of raw materials and the optimization of processes, the decolourizing flocculant has the advantages of wide application and high efficiency, and is suitable for treating wastewater in dye industry, printing and dyeing industry, etc. In addition, the decolouring rate of the decolourizing flocculant is 99%.
Description
The present invention relates to the Treatment of Industrial Water technical field, belong to a kind of method for making of high-efficient decolorizing flocculant.
In the trade effluent, high-chromaticity dye wastewater accounts for suitable proportion.Contain in the dye molecule-SO
3 -Group forms a large amount of negative ions in water, be difficult to realize the decolouring of waste water from dyestuff with general flocculation agent.By a large amount of screenings, find that the Dyhard RU 100 formaldehyde condensation products has the special efficacy that removes the waste water from dyestuff color, it is by providing a large amount of positively charged ions, make on the dye molecule with negative charge be neutralized and unstability, meanwhile, the high-efficient decolorizing flocculant that is added generates a large amount of flosss because of hydrolysis, the dye molecule after its absorption, net for catching fish or birds take off surely, and from water body, separate together, thereby reach the purpose of decolouring.And, produce the general characteristic of the prior art of preparation Dyhard RU 100 formaldehyde condensation products as clear 51-29116 of Japanese Patent and relevant bibliographical information, and be to adopt " single stage method condensation " technology, be about to the disposable input of reactant, react rapidly.But it exists temperature rise too fast, reacts wayward, serious problems such as easy bumping.
Purpose of the present invention, be to provide a kind of novel method that is suitable for the Dyhard RU 100 formaldehyde condensation products preparation that decoloring dye waste water uses, i.e. " two step method condensation " technology, make technological process comparatively stable, be easy to control, and the optimization by material choice and processing condition, make the Dyhard RU 100 formaldehyde condensation products of preparation have the effect of broad-spectrum high efficacy.
The present invention's's " two step method condensation " technological process is: elder generation is with the full dose of Dyhard RU 100 and ammonium chloride proportioning, and the 1/2--2/3 of formaldehyde proportioning amount input is furnished with in the glassed steel reaction vessels of reflux exchanger, be warming up to 48--72 ℃, carry out the first step polycondensation, make temperature of reaction be controlled at 53--77 ℃ by cooling, after the question response peak heat release, add remaining 1/2--1/3 amount formaldehyde again, carry out second one-step polycondensation, controlled temperature is at 58--98 ℃, be incubated 2--4 hour, promptly get product.Material molar ratio is:
Dyhard RU 100: ammonium chloride: formaldehyde=1: 0.6--1.4: 1.4--2.6.
The preferred range of above-mentioned method for making material molar ratio is:
Dyhard RU 100: ammonium chloride: formaldehyde=1: 0.8--1.2: 1.2--2.4.
The application processing method of decolor flocculating agent of the present invention is: this decolor flocculating agent is diluted with 1--5 water doubly, through measuring the pending water of direct injection, stir, there are a large amount of flosss to generate immediately, separate with air supporting or settling process, the slag slurry filters with plate-and-frame filter press.It is handled consumption and looks kind of waste water, character and colourity, determines after test in advance.Decolor flocculating agent of the present invention is suitable for handling the colorful wastewater that pH value is the 7--12 scope, is the 3--12 scope and can relax pH value for the waste liquor behind the dyestuff of saltouing.Discoloring agent of the present invention also can be used with other types such as inorganic or organic floculant, is guaranteeing that decolorizing effect simultaneously, can improve flocculation rate.
(1) method for making embodiment
Method for making embodiment 1.
With Dyhard RU 100 354.0kg and ammonium chloride 178.6kg, formaldehyde 178.6kg drops into and is furnished with in the glassed steel reaction vessels of reflux exchanger, heats up, and carries out " the first step condensation ".When temperature rise to 50 ± 2 ℃, stop heating, and suitably cooling, the attentive response heat release, controlled temperature is 55 ± 2 ℃, after the question response peak heat release, adds remaining 357.0kg formaldehyde again, carries out " the second step condensation ", controlled temperature is incubated 4 hours at 60 ± 2 ℃, promptly gets product.
Method for making embodiment 2.
With Dyhard RU 100 295.0kg and ammonium chloride 186.0kg and formaldehyde 279.0kg, drop in the still with example 1, carry out " the first step condensation ", when temperature rise to 60 ± 2 ℃, stop heating, and suitably cooling, the attentive response heat release, controlled temperature is 65 ± 2 ℃, after the question response peak heat release, adds remaining 279.0kg formaldehyde again, carry out " the second step condensation ", controlled temperature is incubated 3 hours at 70 ± 2 ℃, promptly gets product.
Method for making embodiment 3.
With Dyhard RU 100 265.5kg and ammonium chloride 200.0kg, formaldehyde 401.7kg drops in the still with example 1, carry out " the first step condensation ", during temperature rise to 70 ± 2 ℃, stop heating, and suitably cooling, the attentive response heat release, controlled temperature is at 75 ± 2 ℃, after the question response peak heat release, add remaining formaldehyde 200.0kg again, carry out " the second step condensation ", controlled temperature is at 98 ± 2 ℃, be incubated 2 hours, promptly get product.
(2) Application Example
Application Example 1.
The saltout processing of the residue wastewater behind the dyestuff of DYE PRODUCTION process.Pending high-colour intensity wastewater is the waste water of discharging in the reactive red 7B production process, and pH value is 4, and colourity is 66000 times (referring to extension rate), and the COD value is 12985mg/l.This water 100ml is packed in the colorimetric cylinder of 100ml, add this discoloring agent 50% aqueous solution 4.6ml, mix, promptly have a large amount of flosss to separate out, place 10 minutes after-filtration, the colourity of the filtrate after the processing is 128 times, percent of decolourization is 99.8%, COD is 4746mg/l, and clearance is 63.4%, and PH is 4.5.Amounting to the discoloring agent consumption is 22.9kg/m
3Waste water.
Application Example 2.
Contain the processing of the dyeing waste-water (not containing salinity) of dyestuff.Pending contain that weak acid green--the dyeing waste-water PH of GS is 6.5, and colourity is 129000 times.This water 100ml is packed in the 100ml colorimetric cylinder, adds this discoloring agent 50% aqueous solution 4.6ml, promptly have a large amount of flosss to generate, thorough mixing evenly after, place 10 minutes after-filtration, the colourity of the filtrate after the processing is 640 times, percent of decolourization is 99.5%, PH is 6.Amounting to the discoloring agent consumption is 22.8kg/m
3Waste water.
Application Example 3.
The processing of printing and dyeing and bleaching and dyeing wastewater.Take from the comprehensive wastewater of certain printing and dyeing mill, outward appearance is a light green, milky turbidity, PH is 12, and colourity is 1024 times, and COD is 3864, this water 1000ml is packed in the 1000ml beaker, add this discoloring agent 10% aqueous solution 10ml, promptly have a large amount of flosss to generate, leave standstill 10 minutes after-filtration after fully stirring, liquid colourity is 128 times after treatment, and percent of decolourization is 87.5%, COD is 523, clearance is 86.4%, and PH is 11, and amounting to the discoloring agent consumption is 1kg/m
3Waste water.
Claims (2)
1. the method for making of a high-efficient decolorizing flocculant, promptly to the improvement of Dyhard RU 100 formaldehyde condensation products " single stage method condensation process ", this polycondensation is with Dyhard RU 100, muriate and formaldehyde carry out in being furnished with the reactor of reflux exchanger, it is characterized in that: " two step method condensation process " is the full dose of elder generation with Dyhard RU 100 and ammonium chloride proportioning, 1/2--2/3 amount with the formaldehyde proportioning, input is furnished with in the glassed steel reaction vessels of reflux exchanger, intensification reaches 48--72 ℃, carry out the first step condensation, suitably cooling makes temperature be controlled at 53--77 ℃, after the question response peak heat release again, add remaining 1/2--1/3 amount formaldehyde again, carry out the second step condensation, controlled temperature is incubated 2--4 hour at 58--98 ℃, promptly get product, material molar ratio is:
Dyhard RU 100: ammonium chloride: formaldehyde=1: 0.6--1.4: 1.4--2.6.
2. according to the described method for making of claim 1, its preferred range that is further characterized in that material molar ratio is:
Dyhard RU 100: ammonium chloride: formaldehyde=1: 0.8--1.2: 1.2--2.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101739 CN1060142C (en) | 1995-02-20 | 1995-02-20 | Preparation and application of high performance decolourizing flocculent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101739 CN1060142C (en) | 1995-02-20 | 1995-02-20 | Preparation and application of high performance decolourizing flocculent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1129676A CN1129676A (en) | 1996-08-28 |
| CN1060142C true CN1060142C (en) | 2001-01-03 |
Family
ID=5074073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101739 Expired - Fee Related CN1060142C (en) | 1995-02-20 | 1995-02-20 | Preparation and application of high performance decolourizing flocculent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060142C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100469808C (en) * | 2006-11-21 | 2009-03-18 | 华南理工大学 | Preparation method for instant dicyandiamide formaldehyde resin |
| CN101445283B (en) * | 2008-12-26 | 2012-09-19 | 天津华享水务科技开发有限公司 | Interionic highly-active decolor flocculating agent and application thereof |
| CN102476844A (en) * | 2010-11-23 | 2012-05-30 | 彭彦 | Synthetic method of efficient printing and dyeing wastewater flocculant |
| CN102895806A (en) * | 2012-10-17 | 2013-01-30 | 滁州市润达溶剂有限公司 | Coagulant and preparation method thereof |
| CN104058486B (en) * | 2014-05-29 | 2016-02-10 | 厦门市大净环保科技有限公司 | A kind of organic-inorganic composite high-efficiency decolorant and using method thereof |
| CN104016462B (en) * | 2014-06-17 | 2015-11-04 | 天津大学 | A kind of preparation method of reuse water discoloring agent |
-
1995
- 1995-02-20 CN CN 95101739 patent/CN1060142C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1129676A (en) | 1996-08-28 |
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