CN101070378A - Method for ensuring stable producton in winter of polyester by direct esterification method - Google Patents
Method for ensuring stable producton in winter of polyester by direct esterification method Download PDFInfo
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- CN101070378A CN101070378A CN 200710023686 CN200710023686A CN101070378A CN 101070378 A CN101070378 A CN 101070378A CN 200710023686 CN200710023686 CN 200710023686 CN 200710023686 A CN200710023686 A CN 200710023686A CN 101070378 A CN101070378 A CN 101070378A
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- winter
- polyester
- direct esterification
- fresh
- temperature
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Abstract
A method which ensures the stable production of direct etherification polyester system in winter, can remove the influence on system brought by producing cold fresh EG in winter. Before the fresh EG enters the system, an EG heater (pipe style) will be added between supply pump and flowmeter, and the cold EG will be heated to a certain temperature by steam. Increasing the temperature of cold fresh EG to meet the temperature we need, can remove many negative effects brought by low temperature EG that directly enters the system.
Description
Technical field
The present invention relates to a kind of production method, especially a kind of method of guaranteeing the steady production in winter of direct esterification method polyester system.
Background technology
In method for making polyester, the direct esterification method is started late, and grows up after the refining achieving success of nineteen sixty-five A Moke company to crude terephthalic acid (CTA).The direct esterification method has the following advantages: (1) expense of raw materials reduces; (2) direct esterification method is by-product methyl alcohol not; (3) can be without catalyzer, the Heat stability is good of polymkeric substance; (4) be more suitable for producing high-viscosity polyester.At present, many polyester producers have all adopted direct esterification method production technology both at home and abroad.In direct esterification method production of polyester, there is several places fresh EG to add a little continuously.But low temperature EG directly enters system, will produce a lot of adverse consequencess.Because the EG temperature is low excessively, feasible poly-eventually spray round-robin temperature is uncontrollable, and the EG temperature is crossed the low easy blocking filter of crystalline oligopolymer, the work-ing life of minimizing strainer.If strengthen the amount of vacuum EG, the fresh EG amount that reduces hot well can make the water-content of hot well high and increase the load of vacuum system again.For this reason, improve the fresh EG temperature, reduction low temperature EG just seems extremely crucial and important to the influence of system.
Summary of the invention
Task of the present invention is: a kind of method of guaranteeing that direct esterification method polyester system winter steadily produces is provided, eliminates when producing winter cold fresh EG and bring influence to system.
Technical pattern of the present invention is as follows:
A kind of method of guaranteeing the steady production in winter of direct esterification method polyester system, before fresh EG enters system, between supply pump and under meter, increase an EG well heater (tubular type), with steam cold EG is heated to certain temperature, cold fresh EG is brought influence to system when producing winter to eliminate.
With respect to original technical progress effect be like this: eliminate low temperature EG and directly enter system, a lot of adverse consequencess of generation.
Embodiment
In specific implementation process, in direct esterification method production of polyester, fresh EG is supplied with by supply pump, after the under meter control, enters production equipment again and uses unexpectedly.So, between supply pump and under meter, increase a tubular heater, utilize steam that cold EG is heated, cold fresh EG temperature is brought up to we are temperature required.Like this, just eliminate low temperature EG and directly entered the adverse consequences that is produced after the system.In actual applications, behind the increase EG well heater, influence the unfavorable factor basically eliminate of system's smooth running in winter, guaranteed the steady production of system.
Claims (2)
1. guarantee direct esterification method polyester system steady method of producing in winter for one kind, it is characterized in that before fresh EG enters system, between supply pump and under meter, increase an EG well heater (tubular type).
2. the method for claim 1 is characterized in that with steam cold EG being heated to certain temperature by well heater, and cold fresh EG is brought influence to system when producing winter to eliminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710023686 CN101070378A (en) | 2007-06-12 | 2007-06-12 | Method for ensuring stable producton in winter of polyester by direct esterification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710023686 CN101070378A (en) | 2007-06-12 | 2007-06-12 | Method for ensuring stable producton in winter of polyester by direct esterification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101070378A true CN101070378A (en) | 2007-11-14 |
Family
ID=38897803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710023686 Pending CN101070378A (en) | 2007-06-12 | 2007-06-12 | Method for ensuring stable producton in winter of polyester by direct esterification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101070378A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109456470A (en) * | 2018-11-30 | 2019-03-12 | 江阴赛胜新材料有限公司 | The preparation system and method for optical film polyethylene terephthalate |
| WO2021098071A1 (en) * | 2019-11-22 | 2021-05-27 | 桐昆集团浙江恒通化纤有限公司 | Slurry blending temperature control device and method |
-
2007
- 2007-06-12 CN CN 200710023686 patent/CN101070378A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109456470A (en) * | 2018-11-30 | 2019-03-12 | 江阴赛胜新材料有限公司 | The preparation system and method for optical film polyethylene terephthalate |
| WO2021098071A1 (en) * | 2019-11-22 | 2021-05-27 | 桐昆集团浙江恒通化纤有限公司 | Slurry blending temperature control device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071114 |