TH7159A - Procedures for reducing fluoride levels in poly (tetramethylene ether) glycol. - Google Patents
Procedures for reducing fluoride levels in poly (tetramethylene ether) glycol.Info
- Publication number
- TH7159A TH7159A TH8901000505A TH8901000505A TH7159A TH 7159 A TH7159 A TH 7159A TH 8901000505 A TH8901000505 A TH 8901000505A TH 8901000505 A TH8901000505 A TH 8901000505A TH 7159 A TH7159 A TH 7159A
- Authority
- TH
- Thailand
- Prior art keywords
- ptmeg
- glycol
- poly
- tetramethylene ether
- procedures
- Prior art date
Links
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title claims abstract 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title claims 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 title claims 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title claims 2
- 238000000034 method Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 4
- 238000010438 heat treatment Methods 0.000 claims abstract 3
- 230000002378 acidificating effect Effects 0.000 claims 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000003607 modifier Substances 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- -1 sulfate ester Chemical class 0.000 claims 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims 1
- 229920000909 polytetrahydrofuran Polymers 0.000 abstract 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
Abstract
กรรมวิธีสำหรับการลดทอนระดับฟลูออไรด์ใน PTMEG โดยการทำให้ PTMEG ในน้ำที่มีระดับฟลูออไรด์ไม่เป็นที่พึงประสงค์ (80-600 ส่วนในล้านส่วน) ร้อนถึงอุณหภูมิในช่วงระหว่าง ประมาณ 200 และ 300ฺ ซ ในระยะเวลาพอเพียงที่จะลดปริมาณฟลูออไรด์ ของ PTMEG ดังกล่าว ที่ควรใช้คือการทำให้ร้อนพร้อมการคนให้มี อุณหภูมิระหว่างประมาณ 225 และประมาณ 275ฺซ เป็นเวลาประมาณ 1 นาที ถึงประมาณ 8 ชั่วโมง เมื่อมีเบสในน้ำ ที่ควรใช้มาก ที่ สุดคือ อุณหภูมิ 240 ถึง 250ฺ ซ เมื่อมีปูนขาวในน้ำ A process for reducing the fluoride levels in PTMEG is by heating PTMEG in water with an undesirable fluoride level (80-600 ppm) to temperatures between approximately 200 and 200 ppm. 300 ฺ in just enough time to reduce the fluoride content of such PTMEG that should be used is heating and stirring. Temperatures between approx. 225 and approx. 275 ° C for approximately 1 minute to approx. 8 hours when there is a base in the water, the most preferred temperature is 240 to 250 ° when lime is present in water.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TH7159A true TH7159A (en) | 1990-01-02 |
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