GB140051A - Improvements in the manufacture of phthalic anhydride - Google Patents
Improvements in the manufacture of phthalic anhydrideInfo
- Publication number
- GB140051A GB140051A GB27221/19A GB2722119A GB140051A GB 140051 A GB140051 A GB 140051A GB 27221/19 A GB27221/19 A GB 27221/19A GB 2722119 A GB2722119 A GB 2722119A GB 140051 A GB140051 A GB 140051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phthalic anhydride
- manufacture
- acid
- nitronaphthalene
- distil
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/305—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with sulfur or sulfur-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Furan Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Phthalic anhydride is produced by heating a -nitronaphthalene with sulphuric acid, not necessarily the concentrated or fuming acid, and iron or zinc. After the evolution of gas ceases, the temperature is raised to distil off the phthalic anhydride. Specification 18221/96 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP140051X | 1919-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB140051A true GB140051A (en) | 1921-05-05 |
Family
ID=11849083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27221/19A Expired GB140051A (en) | 1919-03-07 | 1919-11-05 | Improvements in the manufacture of phthalic anhydride |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB140051A (en) |
-
1919
- 1919-11-05 GB GB27221/19A patent/GB140051A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB140051A (en) | Improvements in the manufacture of phthalic anhydride | |
GB471653A (en) | Improved manufacture of sulphuric acid by the contact process | |
GB348866A (en) | An improvement relating to the purification of sulphuric acid | |
GB205254A (en) | Improved process for the manufacture of dichlor fluorane | |
GB144604A (en) | Manufacture of borneol | |
GB186859A (en) | Manufacture of ª‰-thionaphthisatin | |
GB439509A (en) | Process for the manufacture of 1.4-dihalogen-anthraquinone-2-carboxylic acids | |
GB157030A (en) | Improved manufacture of phthaleins | |
GB424047A (en) | Process for the preparation of dichloracetic acid | |
GB449192A (en) | Manufacture of 1:4:5:8:-naphthalene-tetra-carboxylic acid | |
GB414572A (en) | Manufacture of dicarboxylic acid chlorides | |
GB1064568A (en) | A process for preparing sulphuric acid | |
GB202632A (en) | ||
GB180353A (en) | Process for the manufacture of artificial tanning substances | |
GB160433A (en) | Manufacture of anthraquinone derivatives | |
GB139441A (en) | An improvement in the purification of carbazole | |
GB150709A (en) | The manufacture of a colour of the anthraquinone series | |
GB207840A (en) | Improvements in and relating to the manufacture of dyestuff intermediates | |
GB156964A (en) | A new or improved ointment | |
GB137632A (en) | Improvements in the manufacture of caustic potash | |
GB260544A (en) | Improvements in a process of preparing 2(or 3-)-chloro-quinizarine | |
GB421963A (en) | Improvements in or relating to the preparation of ferric oxide catalysts | |
GB157554A (en) | A process of making lead sulphate direct from lead sulphide ores | |
GB170056A (en) | Improvements in or relating to the manufacture of chlorinated derivatives of toluene | |
GB584774A (en) | Improvements in or relating to the manufacture of carboxylic acids containing sulphur |