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
Application number
IT19238/85A
Other languages
Italian (it)
Other versions
IT8519238A0 (en
Inventor
Renato Morlotti
Roberto Canavesi
Virginio Arrigoni
Original Assignee
Enichem Sintesi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enichem Sintesi filed Critical Enichem Sintesi
Priority to IT19238/85A priority Critical patent/IT1183309B/en
Publication of IT8519238A0 publication Critical patent/IT8519238A0/en
Application granted granted Critical
Publication of IT1183309B publication Critical patent/IT1183309B/en

Links

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).
IT19238/85A 1985-01-25 1985-01-25 Active catalyst for phthalic anhydride prepn. IT1183309B (en)

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)

Also Published As

Publication number Publication date
IT8519238A0 (en) 1985-01-25

Similar Documents

Publication Publication Date Title
IT1183309B (en) Active catalyst for phthalic anhydride prepn.
IT1183180B (en) Surgical-pharmaceutical hygienic prepn.
IT1183600B (en) Pharmaceutically active ubiquinone derivs. prepn.
IT1183308B (en) Aromatic nitrile(s) prepn.
IT1183298B (en) Starch capsules for dietetic usage
IT1183703B (en) Intermediates prepn.
IT1183902B (en) Gel-type detergent
IT1183680B (en) Therapeutic xanthenone derivs. prepn.
IT1183231B (en) Filtration system
IT1183660B (en) Auto-injecting, composite syringe
IT1183461B (en) Water purificn. equipment
IT1183306B (en) Sweetening agent based on maltitol
IT1183307B (en) Sweetening agent based on maltitol
IT1183264B (en) Water highly absorbing compsns.
IT1183723B (en) Super-alcoholic or semi-alcoholic prod.
IT1183059B (en) Di:amine prepn.
IT1183929B (en) Corded fabrics
IT1183255B (en) Single use syringe
IT1183800B (en) Ceramic articles improved moulding
IT1183297B (en) Di:methyl-di:methyl-phenoxy valeric acid prepn.
IT1183817B (en) Incontinence panties made of hygienic, elastic materials
IT1183722B (en) Spray-type hair shampoo
IT1183054B (en) Disinfecting and sterilising compsn.
IT1183704B (en) Adhesive stick
IT1183462B (en) Dough drain plate

Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960115