CN102718343A - Polybasic acid anhydride and polyatomic alcohol based unsaturated polyester resin wastewater treatment method - Google Patents
Polybasic acid anhydride and polyatomic alcohol based unsaturated polyester resin wastewater treatment method Download PDFInfo
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- CN102718343A CN102718343A CN2012102330581A CN201210233058A CN102718343A CN 102718343 A CN102718343 A CN 102718343A CN 2012102330581 A CN2012102330581 A CN 2012102330581A CN 201210233058 A CN201210233058 A CN 201210233058A CN 102718343 A CN102718343 A CN 102718343A
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Abstract
The invention discloses a polybasic acid anhydride and polyatomic alcohol based unsaturated polyester resin wastewater treatment method. The method includes adding a barium chloride, calcium chloride or magnesium chloride precipitating agent into unsaturated polyester resin wastewater to be treated, precipitating and recycling acid anhydride in the wastewater, extracting a filter liquor by a lift pump into a fixed bed which is provided with macroporous resins to be subjected to a full absorption to obtain a filter liquor A, adding nickel chloride or copper chloride into the filter liquor A, and subjecting the filter liquor A to a full absorption by adsorption resins to obtain wastewater which is completely treated. According to the method, the unsaturated polyester resin wastewater treatment which is low in cost and high in efficiency is achieved, wastewater treatment problems which enterprises are confronted with are solved, costs for the enterprises can be saved, and competitive power of the enterprises is improved.
Description
Technical field
The relevant a kind of method of wastewater treatment of the present invention is meant a kind of method of wastewater treatment of the unsaturated polyester resin based on multi-anhydride and polyvalent alcohol especially.
Background technology
Along with fast development of society, the unsaturated polyester resin material is because its particular performances, in the application in each field also more and more widely.Yet how making things convenient for, simply and cheaply the waste water that produces in its production process is administered, is the technical barrier that the sector faces at present.Because the problems that present many improvement technologies face particularly to the processing of lower concentration polyvalent alcohol in the waste water, are the bottleneck problems of effectively handling unsaturated polyester resins wastewater.Many enterprises do not carry out complete processing to the waste water that gives off in order to practice thrift cost, even do not handle and directly discharging.
Though enterprise is a lot of to the wastewater treatment method of unsaturated polyester resin at present; But generally all can use in the following several method one or more in its treatment scheme; Like distillation method, extraction process, membrane filter method and biochemical treatment method etc., and result such as this several method all can cause the cost of whole waste water treatment process to increase to a certain extent or processing efficiency is undesirable.As:
Distillation method: owing to the content of multi-anhydride in the waste water of unsaturated polyester resin and polyvalent alcohol is lower; It is concentrated that most of enterprise all adopts elder generation that waste water is distilled; And then further handle; Though this method can improve the utilization of effective constituent in the waste water to a certain extent, the high energy consumption of distillation method of enrichment and the shortcoming that treatment capacity waits more slowly are the problems that many enterprises have to face.
Extraction process: when utilizing extraction process to carry out the wastewater treatment of unsaturated polyester resin; Because the solubleness of polyvalent alcohol in water is big; Conventional extraction agent is difficult to efficiently, efficiently it is reclaimed, and this method faces the required equipment complicacy equally, possibly cause secondary pollution problems.
Membrane filter method: though its treatment effect is better, because its processing speed is slower, particularly used nf membrane is difficult to the regenerated shortcoming.
Biochemical process:,, therefore when carrying out biochemical treatment, need to add other biological nutrition material owing to the carbon source of having only in the waste water though the biochemical treatment process processing cost is lower; And, since biochemical bacteria to environment or conditional request than higher, cause it in industry, to be used widely.
Summary of the invention
The method of wastewater treatment that the purpose of this invention is to provide a kind of low cost, high efficiency unsaturated polyester resin based on multi-anhydride and polyvalent alcohol.
For realizing above-mentioned purpose, solution of the present invention is:
A kind of method of wastewater treatment of the unsaturated polyester resin based on multi-anhydride and polyvalent alcohol, concrete steps are:
Step 1, at first pending unsaturated polyester resins wastewater is moved in the reaction kettle, add bariumchloride, calcium chloride or magnesium chloride precipitation agent, stir under the room temperature, filter to isolate throw out;
Step 2, will filtrate and utilize the lift pump suction to be equipped with in the fixed bed of macroporous resin fully to adsorb then, A must filtrate;
Step 3 and then in filtrating A, add nickelous chloride or cupric chloride, stirring at room is utilized lift pump the waste water suction to be equipped with in the fixed bed of polymeric adsorbent again and is fully adsorbed, and promptly get the waste water after the processing fully.
In the said step 11 ton of pending unsaturated polyester resins wastewater is moved in the reaction kettle, need bariumchloride, calcium chloride or the magnesium chloride precipitation agent of 0.02 ton of adding, stirred 30 minutes under the room temperature.
Macroporous resin in the said step 2 is the polar macroporous resin of LSA-1 type.
In the said step 3, in filtrating A, add 5 kilograms nickelous chloride or cupric chloride, stirring at room 30 minutes.
Polymeric adsorbent in the said step 3 is a D311 type chelating absorption resin.
After adopting such scheme; The present invention systematically analyzes existing relative merits to the unsaturated polyester waste water treatment process; Carry out the characteristics of unsaturated polyester resin its waste water when producing to multi-anhydride and polyvalent alcohol; With how low-cost and simply, efficiently the multi-anhydride in the waste water and polyvalent alcohol to be carried out abundant recycling be clue, earlier the acid anhydrides in the waste water is precipitated and reclaims, and then utilize absorption method that remaining multi-anhydride of post precipitation and polyvalent alcohol are carried out adsorption treatment; And sorbing material can be simply, regeneration efficiently, thereby realize low-cost, high efficiency processing to unsaturated polyester resins wastewater.The present invention not only can solve the waste water handling problem that enterprise faces, and can practice thrift cost for enterprise, improves Enterprises'Competitiveness.
In addition; It is simple that the existing relatively method of the inventive method has whole flow operations; Cost is lower, and day bigger characteristics, particularly patent art of processing are discerned and caught a spot of polyvalent alcohol in the waste water with a small amount of transition metal ion; And then utilize resin that it is carried out adsorption treatment, thereby make COD in the waste water after the processing less than 50mg/L.
Description of drawings
Fig. 1 is an implementation process synoptic diagram of the present invention.
Embodiment
Cooperate shown in Figure 1ly, the present invention has disclosed a kind of method of wastewater treatment based on multi-anhydride and polyvalent alcohol insatiable hunger resin, and its concrete steps are:
Step 1, at first 1 ton of pending unsaturated polyester resins wastewater is moved in the reaction kettle 1, add about 0.02 ton bariumchloride (or calcium chloride, magnesium chloride) precipitation agent, stir after 30 minutes under the room temperature, filter to isolate throw out;
Step 2, will filtrate and utilize lift pump 2 suction to be equipped with in the fixed bed 3 of the polar macroporous resin of LSA-1 type fully to adsorb then, A must filtrate;
Add about 5 kilograms nickelous chloride (or cupric chloride) among step 3 and then the filtrating A in moving into reaction kettle 4; After the stirring at room 30 minutes; Utilize lift pump 2 the waste water suction to be equipped with in the fixed bed 5 of D311 type chelating absorption resin again and fully adsorb, promptly get the waste water after handling fully.
Therefore, the present invention is based on the characteristics of unsaturated polyester waste water, earlier acid anhydrides in the waste water is precipitated, thus the cutting out partial anhydride compound; Because the content of acid anhydrides is lower in the waste water of post precipitation, therefore adopt the polar macroporous resin of LSA-1 type that remaining acid anhydrides is carried out adsorption treatment again; Because polyvalent alcohol also has stronger nonpolar nature, the polar macroporous resin of LSA-1 type also has certain adsorption to it, but can't reach the effect of absorption fully; At this moment; Add a small amount of transition metal ion in the filtrating after absorption; Make it a spot of polyvalent alcohol in the filtrating is discerned and caught, and then utilize D311 type chelating absorption resin that it is further adsorbed, thereby make in the waste water after the processing COD less than 50mg/L.
So key point of the present invention is:
1, polar macroporous resin and polymeric adsorbent selection and the utilization when unsaturated polyester resins wastewater is handled;
2, adopt transition metal ion to the identification of polyvalent alcohol and when catching, the selection of nickelous chloride and cupric chloride.
Claims (5)
1. method of wastewater treatment based on the unsaturated polyester resin of multi-anhydride and polyvalent alcohol, concrete steps are:
Step 1, at first pending unsaturated polyester resins wastewater is moved in the reaction kettle, add bariumchloride, calcium chloride or magnesium chloride precipitation agent, stir under the room temperature, filter to isolate throw out;
Step 2, will filtrate and utilize the lift pump suction to be equipped with in the fixed bed of macroporous resin fully to adsorb then, A must filtrate;
Step 3 and then in filtrating A, add nickelous chloride or cupric chloride, stirring at room is utilized lift pump the waste water suction to be equipped with in the fixed bed of polymeric adsorbent again and is fully adsorbed, and promptly get the waste water after the processing fully.
2. the method for wastewater treatment of the unsaturated polyester resin based on multi-anhydride and polyvalent alcohol as claimed in claim 1; It is characterized in that: in the said step 11 ton of pending unsaturated polyester resins wastewater is moved in the reaction kettle; Need bariumchloride, calcium chloride or the magnesium chloride precipitation agent of 0.02 ton of adding, stirred 30 minutes under the room temperature.
3. the method for wastewater treatment of the unsaturated polyester resin based on multi-anhydride and polyvalent alcohol as claimed in claim 1, it is characterized in that: the macroporous resin in the said step 2 is the polar macroporous resin of LSA-1 type.
4. like the method for wastewater treatment of claim 1,2 or 3 described unsaturated polyester resins based on multi-anhydride and polyvalent alcohol, it is characterized in that: in the said step 3, in filtrating A, add about 5 kilograms nickelous chloride or cupric chloride, stirring at room 30 minutes.
5. the method for wastewater treatment of the unsaturated polyester resin based on multi-anhydride and polyvalent alcohol as claimed in claim 4, it is characterized in that: the polymeric adsorbent in the said step 3 is a D311 type chelating absorption resin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210233058 CN102718343B (en) | 2012-07-06 | 2012-07-06 | Polybasic acid anhydride and polyatomic alcohol based unsaturated polyester resin wastewater treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210233058 CN102718343B (en) | 2012-07-06 | 2012-07-06 | Polybasic acid anhydride and polyatomic alcohol based unsaturated polyester resin wastewater treatment method |
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| CN102718343A true CN102718343A (en) | 2012-10-10 |
| CN102718343B CN102718343B (en) | 2013-12-18 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439888A (en) * | 2008-10-30 | 2009-05-27 | 安徽淮河化工股份有限公司 | Method for treating unsaturated polyester resins wastewater |
| CN102001794A (en) * | 2010-11-30 | 2011-04-06 | 华东理工大学 | Method for treating unsaturated polyester resin production wastewater |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439888A (en) * | 2008-10-30 | 2009-05-27 | 安徽淮河化工股份有限公司 | Method for treating unsaturated polyester resins wastewater |
| CN102001794A (en) * | 2010-11-30 | 2011-04-06 | 华东理工大学 | Method for treating unsaturated polyester resin production wastewater |
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