SU146736A1 - Method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalate - Google Patents
Method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalateInfo
- Publication number
- SU146736A1 SU146736A1 SU734892A SU734892A SU146736A1 SU 146736 A1 SU146736 A1 SU 146736A1 SU 734892 A SU734892 A SU 734892A SU 734892 A SU734892 A SU 734892A SU 146736 A1 SU146736 A1 SU 146736A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- regeneration
- polyethylene terephthalate
- splitting
- terephthalic acid
- ester
- Prior art date
Links
Description
При производстве полиэфирного волокна и пленок из полиэтилентерефталевой смолы получаетс большое количество отходов.In the production of polyester fiber and polyethylene terephthalic resin films, a large amount of waste is produced.
Известный способ регенерации дигликолевого эфира терефталевой кислоты из этих отходов обработкой их этиленгликолем запимает 6-9 часов.A known method of regeneration of terephthalic diglycolic ester from these wastes by treating them with ethylene glycol captures 6–9 hours.
Предлагаемый способ ускор ет процесс за счет применени катализаторов-солей угольной и уксусной кислот.The proposed method accelerates the process by using carbon-acetic acid salt catalysts.
Получаемый дигликолевый эфир терефталевой кислоты путем переэтерификации перевод т в диметилтерефталат, регенериру свободный этиленгликоль. Выдел емые диметилтерефталат и этиленгликоль вновь используют в качестве исходных в синтезе полиэтилентерефталата. Пример.The resulting terephthalic acid diglycol ester is converted into dimethyl terephthalate by transesterification, regenerated with free ethylene glycol. The recovered dimethyl terephthalate and ethylene glycol are again used as starting materials in the synthesis of polyethylene terephthalate. Example.
Берут 12 отдельных проб, состо щих из 100 вес. ч. полиэтилентерефталевой крошки, 300 вес. ч. этиленгликол с добавками (вес. ч.):Take 12 separate samples consisting of 100 weight. including polyethylene terephthalic chips, 300 wt. including ethylene glycol with additives (wt. h):
в пробе № 1 -0,3 карбоната свинцаin sample number 1-0.3 carbonate lead
в пробе № 2 -1,0 карбоната магни in sample number 2 -1,0 magnesium carbonate
в пробе № 3 -1,0 карбоната кали in sample number 3 -1,0 potassium carbonate
в пробе № 4 -1,0 карбоната натри in sample number 4 -1.0 sodium carbonate
в пробе № 5 -0,15 карбоната марганцаin sample number 5-0.15 manganese carbonate
в пробе № 6 -0,7 карбоната никел in sample number 6-0.7 nickel carbonate
в пробе № 7 -0,05 карбоната цинкаin the sample number 7-0.05 zinc carbonate
в пробе № 8 -0,4 карбоната кобальтаin sample number 8 -0.4 cobalt carbonate
в пробе JY 9 -0,3 ацетата марганцаin the sample JY 9-0.3 manganese acetate
в пробе № 10-0,4 ацетата кобальтаin the sample number 10-0,4 cobalt acetate
в пробе Л9 И-0,4 ацетата магни in the sample L9 And 0.4 mg magnesium acetate
в пробе № 12-0,1 ацетата цинкаin the sample number 12-0,1 zinc acetate
Пробы нагревают при 197,4° в сосудах, снабженных обратными холодильниками . Растворение проб № 1, 2, 3, 4, 5, 6, 8, 10 заканчиваетс через 2 часа, пробы N° 7, 9, 11 и 12 раствор ютс через один час.Samples are heated at 197.4 ° in vessels equipped with reflux condensers. Dissolution of samples No. 1, 2, 3, 4, 5, 6, 8, 10 ends after 2 hours, samples N ° 7, 9, 11 and 12 dissolve after one hour.
№ 146736-2 Из полученных растворов дигликолевого эфира терафталевой кислоты путем переэтерификации метанолом получают диметилтерефталат и регенерируют этиленгликоль, которые пригодны дл синтеза полиэтилентерефталата. Температура плавлени регенерированного диметилтерефталата лежит в пределах 140,3-140,6°.No. 146736-2 From the obtained solutions of teraphthalic acid diglycol ether, by transesterification with methanol, dimethyl terephthalate is obtained and ethylene glycol is regenerated, which are suitable for the synthesis of polyethylene terephthalate. The melting point of regenerated dimethyl terephthalate is in the range of 140.3-140.6 °.
Предмет изобретени Subject invention
Способ регенерации дигликолевого эфира терефталевой кислоты расщеплением полиэтилентерефталата этиленгликолем, отличающийс тем, что, с целью сокращени продолжительности процесса, его ведут в присутствии катализаторов - солей угольной и уксусной кислот.The method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalate with ethylene glycol, characterized in that, in order to reduce the duration of the process, it is carried out in the presence of catalysts - salts of carbonic and acetic acids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU734892A SU146736A1 (en) | 1961-06-19 | 1961-06-19 | Method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU734892A SU146736A1 (en) | 1961-06-19 | 1961-06-19 | Method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU146736A1 true SU146736A1 (en) | 1961-11-30 |
Family
ID=48302167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU734892A SU146736A1 (en) | 1961-06-19 | 1961-06-19 | Method of regeneration of terephthalic acid diglycolic ester by splitting polyethylene terephthalate |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU146736A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022243832A1 (en) * | 2021-05-17 | 2022-11-24 | Aquafil S.P.A. | Process for depolymerizing polyethylene terephthalate by glycolysis |
-
1961
- 1961-06-19 SU SU734892A patent/SU146736A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022243832A1 (en) * | 2021-05-17 | 2022-11-24 | Aquafil S.P.A. | Process for depolymerizing polyethylene terephthalate by glycolysis |
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