CN101245009A - Production method for p-benzene dioctyl dicarboxylic acid elasticizer - Google Patents
Production method for p-benzene dioctyl dicarboxylic acid elasticizer Download PDFInfo
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- CN101245009A CN101245009A CNA2008100611457A CN200810061145A CN101245009A CN 101245009 A CN101245009 A CN 101245009A CN A2008100611457 A CNA2008100611457 A CN A2008100611457A CN 200810061145 A CN200810061145 A CN 200810061145A CN 101245009 A CN101245009 A CN 101245009A
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Abstract
The invention relates to a producing method of DOTP plasticizer, which comprising the following steps: the cleaned and dried polyester waste cloth is cut up and then is put into a reaction kettle in which octanol and absolute ethylene glycol are added, and temperature is increased to 100 DEG C; catalyst is added after the process of vacuum dehydration, temperature is increased to 160 to 190DEG C, the condition is kept for 4 to 6 hours, and after being degraded by the octanol, the waste polyester is put into ester exchange reaction with the octanol; the obtained material is neutralized, by-product glycol solution is separated out after the processes of stripping discoloration and vacuum dehydration, at last, the products of DOTP being produced after the process of pressure filtration. The method adopts nondegradable and environment-polluted polyester to be raw materials for the production of DOTP, which changes the waste into treasure so as to reduce the burden of environment, reduce the production cost and selling prices, and has simple technique, the by-product, glycol solution can be regarded as the antifreezing coolant, so the method has good economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of manufacture method of softening agent, particularly a kind of manufacture method of dioctyl terephthalate softening agent
Background technology
Dioctyl terephthalate (DOTP) is to begin a kind of new plasticizer of producing and using the eighties, because its excellent property has become and used one of primary plasticizer more widely in the plastic working.Its purposes mainly contains: (1) is used for polyvinyl chloride (PVC) plastics in a large number and makes primary plasticizer, especially the flexible article softening agent.(2) be widely used in the production of high temperature resistant polyvinyl chloride cable material, abroad widespread usage in 70 ℃ of level CABLE MATERIALS are produced.(3) as elastomeric softening agent.(4) as paint additive.When covering with paint, lacquer, colour wash, etc. wood furniture, in by the lacquer of nitrocotton ester system, add an amount of DOTP, can prevent shortcomings such as year lacquer painting be full of cracks of a specified duration.(5) as lubricating oil additive.(6) as the precision instrument lubricant, DOTP is a transparent liquid, and viscosity is 65 * 10-3Pas in the time of 25 ℃, high lubricating effect.(7) as the tenderizer of paper, consumption 0.25%～1.00% just can improve the flexibility of paper significantly.
The method of producing DOTP has three kinds: the one, and terephthalic acid (TPA) direct esterification method discloses the method that adopts terephthalic acid and good fortune alcohol to prepare the dioctyl terephthalate softening agent as CN1268675C; The 2nd, dimethyl terephthalate (DMT) (DMT) ester-interchange method; The 3rd, useless polyester edman degradation Edman.Because TPA and DMT are well sold and in short supply more expensive industrial chemicals, the cost that is used for producing DOTP is higher.And with waster terylene produce DOTP be a kind ofly turn waste into wealth, very economical method.The external terylene production equipment of a large amount of introductions of China recent years, people more and more pay attention to problem how to recycle the terylene waste product; CN 1034534A discloses the method that the terylene tankage that adopt terylene textile mills are produced dioctyl terephthalate, also need be through distillation, neutralization after transesterification reaction, repeatedly wash and many flow processs such as filtration.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of manufacture method of making raw material production dioctyl terephthalate (DOTP) softening agent with polyester disused cloth.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of manufacture method of dioctyl terephthalate softening agent, it comprises following process steps:
(1) will clean, dried 30-50 weight part polyester disused cloth chopping, drop into reactor;
(2) do not have water glycol to reactor interpolation 50-70 weight part octanol and 5-7 weight part, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 0.6-2 weight part zinc acetate as catalyzer to reactor, heat to 160--190 ℃, 4--6 hour, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
The manufacture method of another kind of dioctyl terephthalate softening agent, it comprises following process steps:
(1) will clean, dried 30-50 weight part polyester disused cloth chopping, drop into reactor;
(2) do not have water glycol to reactor interpolation 50-70 weight part octanol and 5-7 weight part, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 0.5-1 weight part phthalandione four butyl esters as catalyzer to reactor, heat to 160--190 ℃, 4--6 hour, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
Wherein alcoholysis reaction is:
Wherein transesterification reaction is:
The invention has the beneficial effects as follows:
1. tradition manufacturing softening agent is that refinery products--phthalic acid (TPA) or rutgers (DMT) are made raw material, the cost height in employing.The present invention adopts the polyester disused cloth of non-degradable, contaminate environment to make raw material and makes DOTP; turn waste into wealth; alleviate the burden of environment protection; reduce production costs and price; technology is simple; its byproduct ethylene glycol solution can be used as the anti-freeze cooling liquid of motor car engine, has good economic benefit and social benefit.
2. the present invention adopts single zinc acetate or single phthalandione four butyl esters as catalyzer, helps to reduce the required temperature of alcoholysis and transesterification reaction, improves its speed of response and production efficiency, simplification processing sequence, reduces production costs.
Description of drawings
Fig. 1 is technological process of production figure of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1 is as shown in Figure 1: a kind of manufacture method of dioctyl terephthalate softening agent, and it comprises following process steps:
(1) will clean, the chopping of dried 4100 kilograms of polyester disused cloths, drop into reactor;
(2) add 6100 kilograms of octanols to reactor, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 100 kilograms of zinc acetates as catalyzer to reactor, heat to 180 ℃, 4.5 hours, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
Embodiment 2: a kind of manufacture method of dioctyl terephthalate softening agent, and it comprises following process steps:
(1) will clean, the chopping of dried 4100 kilograms of polyester disused cloths, drop into reactor;
(2) add 6100 kilograms of octanols to reactor, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 80 kilograms of phthalandione four butyl esters as catalyzer to reactor, heat to 170 ℃, 5.5 hours, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
Claims (2)
1. the manufacture method of a dioctyl terephthalate softening agent, it is characterized in that: it comprises following process steps:
(1) will clean, dried 30-50 weight part polyester disused cloth chopping, drop into reactor;
(2) do not have water glycol to reactor interpolation 50-70 weight part octanol and 5-7 weight part, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 0.6-2 weight part zinc acetate as catalyzer to reactor, heat to 160--190 ℃, 4--6 hour, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
2. the manufacture method of a dioctyl terephthalate softening agent is characterized in that it comprises following process steps:
(1) will clean, dried 30-50 weight part polyester disused cloth chopping, drop into reactor;
(2) do not have water glycol to reactor interpolation 50-70 weight part octanol and 5-7 weight part, heat to 100 ℃;
(3) vacuum hydro-extraction;
(4) add 0.5-1 weight part phthalandione four butyl esters as catalyzer to reactor, heat to 160--190 ℃, 4--6 hour, waster terylene carried out transesterify with octanol after being degraded by octanol again;
(5) with the neutralization of step 4 gained material, ethylene glycol solution is isolated in stripping decolouring, vacuum hydro-extraction, again through press filtration, produces dioctyl terephthalate softening agent finished product;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100611457A CN101245009A (en) | 2008-03-14 | 2008-03-14 | Production method for p-benzene dioctyl dicarboxylic acid elasticizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100611457A CN101245009A (en) | 2008-03-14 | 2008-03-14 | Production method for p-benzene dioctyl dicarboxylic acid elasticizer |
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| CN101245009A true CN101245009A (en) | 2008-08-20 |
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| CNA2008100611457A Pending CN101245009A (en) | 2008-03-14 | 2008-03-14 | Production method for p-benzene dioctyl dicarboxylic acid elasticizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811970A (en) * | 2010-05-05 | 2010-08-25 | 江苏强林生物能源有限公司 | Production method of dioctyl terephthalate composite plasticizer |
| CN102010337A (en) * | 2010-11-08 | 2011-04-13 | 天津工业大学 | Method and equipment for decoloring dioctyl terephthalate raw ester |
| CN102241592A (en) * | 2010-05-12 | 2011-11-16 | 无棣永昕生物工程有限公司 | Method for producing dioctyl terephthalate from polyester waste |
| CN102992956A (en) * | 2011-09-13 | 2013-03-27 | 湖南长岭石化科技开发有限公司 | Preparation method of 2-butyl alcohol |
-
2008
- 2008-03-14 CN CNA2008100611457A patent/CN101245009A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811970A (en) * | 2010-05-05 | 2010-08-25 | 江苏强林生物能源有限公司 | Production method of dioctyl terephthalate composite plasticizer |
| CN101811970B (en) * | 2010-05-05 | 2013-12-18 | 江苏强林生物能源有限公司 | Production method of dioctyl terephthalate composite plasticizer |
| CN102241592A (en) * | 2010-05-12 | 2011-11-16 | 无棣永昕生物工程有限公司 | Method for producing dioctyl terephthalate from polyester waste |
| CN102010337A (en) * | 2010-11-08 | 2011-04-13 | 天津工业大学 | Method and equipment for decoloring dioctyl terephthalate raw ester |
| CN102010337B (en) * | 2010-11-08 | 2013-06-05 | 天津工业大学 | Method and equipment for decoloring dioctyl terephthalate raw ester |
| CN102992956A (en) * | 2011-09-13 | 2013-03-27 | 湖南长岭石化科技开发有限公司 | Preparation method of 2-butyl alcohol |
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Open date: 20080820 |