Continuous production system of poly(trimethylene terephthalate)
A polyterephthalic acid and propylene glycol technology, applied in the direction of coating, etc., can solve the problems of 1,3-propylene glycol recycling production system, restricting the development of PTT molding products, low utilization rate of raw materials, etc., and reaching the glass transition temperature Improved, improved particle performance, and easier packaging
Active Publication Date: 2013-01-30
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
There are many devices or systems for producing PTT, but there is no continuous production system that includes the whole process of crystallization, drying, pelletizing and packaging from the production of polyester material itself, and there is no one that can produce The production system in which all 1,3-propanediol (PDO) produced in the process is recycled and reused, the production efficiency is not high, and the utilization rate of raw materials is not high, which restricts the development of PTT molding products
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The invention provides a continuous production system for poly(1,3-trimethylene terephthalate), figure 1 One example of this is shown. The system includes an esterification subsystem, a polycondensation subsystem, and a cutting and crystallization drying subsystem connected in sequence, and the gas phase outlet of the esterification subsystem is connected to a process tower 26 for preliminary distillation of the gas phase output of the esterification section. Inlet, the liquid phase outlet of the process tower is connected to the input port of the PDO mixture to be refined in a refining device, and the PDO-containing mixture discharged from the esterification section in the continuous production of PTT is introduced into the refining device for purification. The polycondensation subsystem in the polycondensation subsystem The gas phase outlet of the reactor (the first pre-condensation reactor 23, the second pre-condensation reactor 24 and the final polycondensation reac...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a continuous production system of poly(trimethylene terephthalate) (PTT). The system comprises an esterification subsystem, a polycondensation subsystem and a granulating crystallization drying subsystem that are connected in order. A gas outlet of the esterification subsystem is connected to an inlet of a process tower for preliminary distillation of discharged gas from esterification. A liquid outlet of the process tower is connected to an inlet for a PDO mixture to be refined in a refining device. A discharged gas outlet of a polycondensation reactor in the polycondensation subsystem is in connection with an corresponding inlet for a medium to be leached in a spraying device. A liquid outlet for refined PDO in the refining device is in connection with a PDO rawmaterial inlet of the esterification subsystem and / or a spraying medium inlet of the spraying device. Employment of the system provided in the invention can continuously and stably realize the whole process from PTT material production to PTT granulation, crystallization, drying and packaging, and also can realize the utmost recycling of 1, 3-propanediol within the system, thus substantially reducing production cost.
Description
technical field [0001] The invention relates to a continuous production system of 1,3-trimethylene terephthalate, which belongs to the field of chemical production. Background technique [0002] Polypropylene terephthalate (PTT) is a new type of polyester material successfully developed industrially in the mid-1990s. There are many devices or systems for producing PTT, but there is no continuous production system that includes the whole process of crystallization, drying, pelletizing and packaging from the production of polyester material itself, and there is no one that can produce The production system in which all 1,3-propanediol (PDO) produced in the process is recycled and reused has low production efficiency and low raw material utilization, which restricts the development of PTT molding products. Contents of the invention [0003] In order to overcome the above defects, the present invention provides a continuous production system of poly(1,3-trimethylene terephtha...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/78B29B9/16
Inventor 周华堂顾爱军杨建川丰存礼李盛兴
Owner BC P INC CHINA NAT PETROLEUM CORP