CN109678760A - A method of it recycling TDI and produces waste residue - Google Patents
A method of it recycling TDI and produces waste residue Download PDFInfo
- Publication number
- CN109678760A CN109678760A CN201910100688.3A CN201910100688A CN109678760A CN 109678760 A CN109678760 A CN 109678760A CN 201910100688 A CN201910100688 A CN 201910100688A CN 109678760 A CN109678760 A CN 109678760A
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- Prior art keywords
- waste residue
- tdi
- added
- oxidant
- acid
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of methods of recycling TDI production waste residue, belong to chemical spent material processing technology field, this method specifically: acid solution is added into TDI production waste residue, oxidant is added after mixing, reacts 2-8h at 40-70 DEG C；100 DEG C or more are then heated to, starts distillation dehydration to theoretical water yield, obtains dewatered slurry；(2) thickener is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains suspension.Processing TDI produces waste residue in this way, it is simple to operation, and without consuming mass energy, it is not high to equipment requirement, highly-safe, in the whole process, other exhaust gas, waste liquid and waste material will not be generated, this method green, environmental protection can generate preferable economic benefit, social benefit and environmental benefit.The product handled by this method can realize the recycling of TDI production waste residue directly as the raw material of water-based anticorrosive paint well.
Description
Technical field
The invention belongs to chemical spent material processing technology fields, and in particular to a method of it recycles TDI and produces waste residue.
Background technique
TDI is one of primary raw material of polyurethane plastics, is high value added product.But TDI can be generated in process of production
A certain amount of waste residue, this waste residue viscosity is higher, and color is deeper, general to be handled by burning, but this treatment process meeting
A large amount of hydrocarbon, oxynitrides and smog are generated, and handle these exhaust gas to generate a large amount of waste water again, it will right
Environment forms pollution again.On the other hand, the incineration temperature needed when burning disposal is higher, at 1200 DEG C or more, greatly mentions
High cost of investment.In addition, TDI waste residue, which is carried out catalyzing hydrolysis, generates toluenediamine monomer, it is also able to achieve TDI production waste residue
It recycles, but requirement of this method to equipment is high, investment is high, production security is difficult to ensure, and thus bring equipment fills
The problems such as setting pipeline blocking, therefore be difficult to realize industrialize.Therefore, it is badly in need of a kind of simple process, safety not high to equipment requirement
Property the high method for recycling TDI production waste residue.
Summary of the invention
In view of this, one of the objects of the present invention is to provide a kind of methods of recycling TDI production waste residue；Purpose it
Two are to provide application of the product obtained by recycling TDI production waste residue method in coating.
In order to achieve the above objectives, the invention provides the following technical scheme:
1, a kind of method for recycling TDI production waste residue, described method includes following steps:
(1) acid solution is added into TDI production waste residue, oxidant is added after mixing, reacts 2-8h at 40-70 DEG C；So
After be warming up to 100 DEG C or more, distillation dehydration to theoretical water yield obtains dewatered slurry；
(2) thickener is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains suspension, i.e.,
It can.
Preferably, in step (1), the addition of the oxidant specifically carries out as follows: 300-1000r/min's
It is added under mixing speed by the speed of 50-150g/h.
Preferably, in step (1), the rate of the heating is 2-20 DEG C/min.
Preferably, in step (2), the partial size of solid particle is 120-200 mesh in the suspension.
Preferably, in step (1), the molar ratio of acid and Oligoaniline in TDI production waste residue in the acid solution
For 1-3:3-1.
Preferably, the acid one of is but is not limited to hydrochloric acid, sulfuric acid or phosphoric acid.
Preferably, in step (1), the molar ratio of Oligoaniline is 1-3 in the oxidant and TDI production waste residue:
3-1。
Preferably, the oxidant is but is not limited to one of hydrogen peroxide or ammonium persulfate.
Preferably, in step (2), the thickener is water-based thickener.
Preferably, the thickener is HY-305.
2, application of the suspension of method preparation in coating.
The beneficial effects of the present invention are: the present invention provides a kind of method of recycling TDI production waste residue, this method
Suspension is obtained after TDI is mainly produced waste residue oxidation polymerization using oxidant, which is used directly for aqueous painting
Material handles TDI in this way and produces waste residue, simple to operation, and without consuming mass energy, peace not high to equipment requirement
Quan Xinggao will not generate other exhaust gas, waste liquid and waste material in the whole process, and this method green, environmental protection can generate preferably
Economic benefit, social benefit and environmental benefit.The product handled by this method can be directly as water-based anticorrosive paint
Raw material, realize well TDI production waste residue recycling.
Specific embodiment
Below by a preferred embodiment of the present invention will be described in detail.
Embodiment 1
A method of it recycling TDI and produces waste residue
(1) it is produced in waste residue for 1:1 to TDI by the molar ratio of acid and Oligoaniline in TDI production waste residue in acid solution
Sulfuric acid is added, producing the molar ratio of Oligoaniline in waste residue by oxidant and TDI after mixing is 1:1, in the stirring of 600r/min
Hydrogen peroxide is added by the speed of 80g/h under speed, reacts 5h at 55 DEG C；Then 100 DEG C are warming up to the rate of 10 DEG C/min
More than, distillation dehydration to theoretical water yield obtains dewatered slurry；
(2) Beijing Mai Er chemical industry HY-305 is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains
To suspension, the partial size of solid particle is 200 mesh in the suspension；
(3) suspension being obtained as one of raw material using step (2) and preparing waterborne epoxy coatings, the additive amount of the suspension is
15wt%.
Embodiment 2
(1) it is produced in waste residue for 1:3 to TDI by the molar ratio of acid and Oligoaniline in TDI production waste residue in acid solution
Phosphoric acid is added, producing the molar ratio of Oligoaniline in waste residue by oxidant and TDI after mixing is 1:3, in the stirring of 1000r/min
Ammonium persulfate is added by the speed of 150g/h under speed, reacts 2h at 70 DEG C；Then 100 are warming up to the rate of 5 DEG C/min
DEG C or more, distillation dehydration to theoretical water yield obtains dewatered slurry；
(2) Beijing Mai Er chemical industry HY-305 is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains
To suspension, the partial size of solid particle is 150 mesh in the suspension；
(3) suspension being obtained as one of raw material using step (2) and preparing waterborne epoxy coatings, the additive amount of the suspension is
10wt%.
Embodiment 3
(1) it is produced in waste residue for 3:1 to TDI by the molar ratio of acid and Oligoaniline in TDI production waste residue in acid solution
Hydrochloric acid is added, producing the molar ratio of Oligoaniline in waste residue by oxidant and TDI after mixing is 3:1, in the stirring of 300r/min
Hydrogen peroxide is added by the speed of 50g/h under speed, reacts 8h at 40 DEG C；Then 100 DEG C are warming up to the rate of 20 DEG C/min
More than, distillation dehydration to theoretical water yield obtains dewatered slurry；
(2) Beijing Mai Er chemical industry HY-305 is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains
To suspension, the partial size of solid particle is 120 mesh in the suspension；
(3) suspension being obtained as one of raw material using step (2) and preparing waterborne epoxy coatings, the additive amount of the suspension is
15wt%.
The performance for the waterborne epoxy coatings that testing example 1 is prepared into embodiment 3, the results are shown in Table 1.
Table 1
As shown in Table 1, by resulting suspension after method processing TDI production waste residue in the present invention directly as the original of coating
One of material can guarantee that final water paint product obtained has preferable performance.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of method for recycling TDI production waste residue, which is characterized in that described method includes following steps:
(1) acid solution is added into TDI production waste residue, oxidant is added after mixing, reacts 2-8h at 40-70 DEG C；Then it rises
For temperature to 100 DEG C or more, distillation dehydration to theoretical water yield obtains dewatered slurry；
(2) thickener is added in the dewatered slurry obtained into step (1), and wet grinding after mixing obtains suspension.
2. the method as described in claim 1, which is characterized in that in step (1), the addition of the oxidant is specifically pressed such as lower section
Method carries out: being added under the mixing speed of 300-1000r/min by the speed of 50-150g/h.
3. the method as described in claim 1, which is characterized in that in step (1), the rate of the heating is 2-20 DEG C/min.
4. the method as described in claim 1, which is characterized in that in step (2), the partial size of solid particle is in the suspension
120-200 mesh.
5. method according to any of claims 1-4, which is characterized in that acid and institute in step (1), in the acid solution
The molar ratio for stating Oligoaniline in TDI production waste residue is 1-3:3-1.
6. method as claimed in claim 5, which is characterized in that the acid be but be not limited in hydrochloric acid, sulfuric acid or phosphoric acid one
Kind.
7. method according to any of claims 1-4, which is characterized in that in step (1), the oxidant and the TDI
The molar ratio for producing Oligoaniline in waste residue is 1-3:3-1.
8. the method for claim 7, which is characterized in that the oxidant is but is not limited in hydrogen peroxide or ammonium persulfate
One kind.
9. method according to any of claims 1-4, which is characterized in that in step (2), the thickener is aqueous thickening
Agent.
10. application of the suspension of the described in any item method preparations of claim 1-9 in coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100688.3A CN109678760A (en) | 2019-01-31 | 2019-01-31 | A method of it recycling TDI and produces waste residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100688.3A CN109678760A (en) | 2019-01-31 | 2019-01-31 | A method of it recycling TDI and produces waste residue |
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| Publication Number | Publication Date |
|---|---|
| CN109678760A true CN109678760A (en) | 2019-04-26 |
Family
ID=66195462
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100688.3A Pending CN109678760A (en) | 2019-01-31 | 2019-01-31 | A method of it recycling TDI and produces waste residue |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499035A (en) * | 1967-10-02 | 1970-03-03 | Olin Mathieson | Toluene diamine recovery process |
| US4091009A (en) * | 1976-08-16 | 1978-05-23 | Olin Corporation | Process for deactivating toluene diisocyanate distillation residue |
| US4105686A (en) * | 1977-06-15 | 1978-08-08 | Olin Corporation | Process for deactivating toluene diisocyanate distillation residue |
| US4118586A (en) * | 1977-09-12 | 1978-10-03 | Olin Corporation | Process for preparing dihydroxytoluene |
| US4137266A (en) * | 1976-09-27 | 1979-01-30 | Olin Corporation | Process for toluene diamine recovery |
| CN102633651A (en) * | 2011-01-27 | 2012-08-15 | 沧州丰源环保科技有限公司 | Toluene diamine recovery from tar waste residues discharged during toluene diisocyanate synthesis |
| CN103058427A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Treatment method of brine waste in production process of toluene-2,4-diisocyanate (TDI) |
| CN103787894A (en) * | 2014-02-08 | 2014-05-14 | 济南大学 | Method for recovering TDA (Toluene Diamine) from residues and wastes formed in preparation process of TDI (Toluene Diisocyanate) |
| CN103804198A (en) * | 2014-02-28 | 2014-05-21 | 济南大学 | Method for recovering toluenediamine from waste slag emitted from production of toluene diisocyanate |
| CN105384644A (en) * | 2015-11-20 | 2016-03-09 | 联化科技（德州）有限公司 | Method for treating isocyanate residues |
| CN205099602U (en) * | 2015-10-28 | 2016-03-23 | 河北丰源环保科技股份有限公司 | Retrieve TDA's economizer in follow TDI residue digest |
| CN105602312A (en) * | 2016-01-21 | 2016-05-25 | 广西大学 | Modified waterborne polyaniline epoxy resin coating and preparation method thereof |
| CN106675303A (en) * | 2016-12-15 | 2017-05-17 | 陕西科技大学 | Water-based polyurethane polyaniline anticorrosive paint and preparation method thereof |
-
2019
- 2019-01-31 CN CN201910100688.3A patent/CN109678760A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499035A (en) * | 1967-10-02 | 1970-03-03 | Olin Mathieson | Toluene diamine recovery process |
| US4091009A (en) * | 1976-08-16 | 1978-05-23 | Olin Corporation | Process for deactivating toluene diisocyanate distillation residue |
| US4137266A (en) * | 1976-09-27 | 1979-01-30 | Olin Corporation | Process for toluene diamine recovery |
| US4105686A (en) * | 1977-06-15 | 1978-08-08 | Olin Corporation | Process for deactivating toluene diisocyanate distillation residue |
| US4118586A (en) * | 1977-09-12 | 1978-10-03 | Olin Corporation | Process for preparing dihydroxytoluene |
| CN102633651A (en) * | 2011-01-27 | 2012-08-15 | 沧州丰源环保科技有限公司 | Toluene diamine recovery from tar waste residues discharged during toluene diisocyanate synthesis |
| CN103058427A (en) * | 2013-01-25 | 2013-04-24 | 甘肃银光聚银化工有限公司 | Treatment method of brine waste in production process of toluene-2,4-diisocyanate (TDI) |
| CN103787894A (en) * | 2014-02-08 | 2014-05-14 | 济南大学 | Method for recovering TDA (Toluene Diamine) from residues and wastes formed in preparation process of TDI (Toluene Diisocyanate) |
| CN103804198A (en) * | 2014-02-28 | 2014-05-21 | 济南大学 | Method for recovering toluenediamine from waste slag emitted from production of toluene diisocyanate |
| CN205099602U (en) * | 2015-10-28 | 2016-03-23 | 河北丰源环保科技股份有限公司 | Retrieve TDA's economizer in follow TDI residue digest |
| CN105384644A (en) * | 2015-11-20 | 2016-03-09 | 联化科技（德州）有限公司 | Method for treating isocyanate residues |
| CN105602312A (en) * | 2016-01-21 | 2016-05-25 | 广西大学 | Modified waterborne polyaniline epoxy resin coating and preparation method thereof |
| CN106675303A (en) * | 2016-12-15 | 2017-05-17 | 陕西科技大学 | Water-based polyurethane polyaniline anticorrosive paint and preparation method thereof |
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Application publication date: 20190426 |