Integrated polyester production facility
View Patent ↗A process for producing terephthalic acid in a TPA facility, polyethylene terephthalate in a PET facility, and containers in a forming facility in which the distance between the TPA facility and the forming facility is less than about 10 miles. There is also described a process for transporting a wet mixture of TPA particles via a convey system to a PET facility. In contrast to traditional processing schemes, the processing steps can be located proximate to each other and can be integrated to eliminate certain intermediate processing steps such as, for example, purification, heating, cooling, and drying.
1. In a process for making a PET container wherein: (a) terephthalic acid (TPA) is produced in a TPA facility; and (b) at least a portion of said TPA product is used to produce a polyethylene terephthalate (PET) product in a PET facility for manufacturing PET; and (c) at least a portion of said PET product is used to make containers in a container forming facility, wherein the distance between said TPA facility and said PET facility is less than about 2 miles, and the distance between said PET facility and said container forming facility is less than about 2 miles, and the temperature of said TPA product between production in said TPA facility and use in said PET facility is maintained above about 100° F.
2. The process of claim 1 , further comprising recovering terephthalyl moieties from scrap and/or used PET in a recovery facility and using at least a portion of the recovered terephthalyl moieties in said PET facility to produced said PET product, wherein the distance between said recovery facility and said PET facility is less than about 2 miles.
3. The process of claim 1 , further comprising filling at least a portion of said containers with a liquid in a filling facility, wherein the distance between said forming facility and said filling facility is less than about 2 miles.
4. The process of claim 1 , wherein said TPA product is maintained in the form of a wet mixture between production in said TPA facility and use in said PET facility, wherein said wet mixture comprises at least about 50 weight percent solid TPA particles and at least about 1 weight percent liquid.
5. The process of claim 4 , wherein said wet mixture is a wet cake.
6. The process of claim 1 , wherein the temperature of said PET product between production in said PET facility and use in said forming facility is maintained above about 100° F.
7. The process of claim 1 , wherein step (c) includes making preforms from said PET product and blow molding said preforms into said containers.
8. The process of claim 7 , wherein the temperature of at least a portion of said preforms is maintained above 100° F. between said making thereof and said blow molding.
9. The process of claim 1 , wherein said TPA facility has a design production rate within about 15 percent of the design feed rate of said PET facility.
10. The process of claim 1 wherein said terephthalic acid produced in said terephthalic acid (TPA) facility, is a wet mixture comprising at least about 50 weight percent of solid TPA particles and at least about 1 weight percent of a liquid; and transporting said wet mixture from said TPA facility to the polyethylene terephthalate (PET) facility via a convey system; and introducing said wet mixture into said PET facility, wherein said PET facility has a design production rate greater than about 4,500 pounds per hour.
11. The process of claim 10 , wherein the temperature of said wet mixture during said transporting is maintained above about 100° F.
12. The process of claim 10 , wherein at least a portion of said transporting is carried out using a conveyor.
13. The process of claim 10 , wherein said wet mixture comprises at least about 75 weight percent of said solid TPA particles and at least about 2 weight percent of said liquid.
14. The process of claim 10 , wherein said liquid comprises at least about 50 volume percent water.
15. The process of claim 10 , wherein said introducing of the wet mixture includes combining said wet mixture with a recirculation liquid and thereafter feeding the combined stream to an esterification reactor.
16. The process of claim 15 , wherein said combining is accomplished without substantial mechanical agitation.
17. The process of claim 15 , wherein said combining is carried out using an eductor.
18. The process of claim 1 , wherein the temperature of said PET product between said PET production facility and use in said forming facility is maintained above about 100° F.
19. The process of claim 7 , wherein the temperature of at least a portion of said preforms is maintained above 100° F. between said making thereof and said blow molding.
20. The process of claim 7 , further comprising filling at least a portion of said containers with a liquid in a filling facility, wherein the distance between said forming facility and said filling facility is less than about 2 miles.