IT1183309B - Active catalyst for phthalic anhydride prepn. - Google Patents
Active catalyst for phthalic anhydride prepn.Info
- Publication number
- IT1183309B IT1183309B IT19238/85A IT1923885A IT1183309B IT 1183309 B IT1183309 B IT 1183309B IT 19238/85 A IT19238/85 A IT 19238/85A IT 1923885 A IT1923885 A IT 1923885A IT 1183309 B IT1183309 B IT 1183309B
- Authority
- IT
- Italy
- Prior art keywords
- coil
- prepn
- phthalic anhydride
- active catalyst
- coils
- Prior art date
Links
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 title 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 title 1
- 239000003054 catalyst Substances 0.000 title 1
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Catalysts (AREA)
- Resistance Heating (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
The heating element (1) comprises two separate electrically conductive coils (4, 11) to act as heating elements. One coil (4) supplies power to the timer control circuit by "tapping" a small amount of power from an external power supply The other coil (11) is a larger coil of greater resistance which acts as the primary heating means of the element. Pref., the coils are surrounded by quartz tube (2). One coil (4) is wound on a ceramic insulating tube with bores for the output end (5) of this coil (4) but the input end (12) of the other coil 811).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT19238/85A IT1183309B (en) | 1985-01-25 | 1985-01-25 | Active catalyst for phthalic anhydride prepn. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT19238/85A IT1183309B (en) | 1985-01-25 | 1985-01-25 | Active catalyst for phthalic anhydride prepn. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8519238A0 IT8519238A0 (en) | 1985-01-25 |
IT1183309B true IT1183309B (en) | 1987-10-22 |
Family
ID=11156017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT19238/85A IT1183309B (en) | 1985-01-25 | 1985-01-25 | Active catalyst for phthalic anhydride prepn. |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1183309B (en) |
-
1985
- 1985-01-25 IT IT19238/85A patent/IT1183309B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8519238A0 (en) | 1985-01-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19960115 |