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Class Information
Number: 562/893
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Carboxylic acid anhydrides (i.e., compounds having the -c(=o)-o-c(=o)- group) > Processes of forming the -c(=o)-o-c(=o)- group > Ether or carboxylic acid ester reactant
Description: Processes wherein an ether or a carboxylic acid ester is used as a reactant.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7427692 |
Process for preparation of 7-[.alpha.-amino (4-hydroxyphenyl) acetamido]-3-substituted-3-cephem-4-carboxylic acid |
Sep. 23, 2008 |
| 7253316 |
Flexible method for the joint production of (i) formic acid, (ii) a carboxylic acid comprising at least two carbon atoms and/or the derivatives thereof, and (iii) a carboxylic acid anhydride |
Aug. 7, 2007 |
| 6469206 |
Process for the preparation of triflic anhydride |
Oct. 22, 2002 |
| 6274096 |
Methanol plant retrofit |
Aug. 14, 2001 |
| 6222070 |
Method for reducing EDA in acetic anhydride production |
Apr. 24, 2001 |
| 5922911 |
Process for the manufacture of acetic anhydride |
Jul. 13, 1999 |
| 5391796 |
Production of trifluorovinyl ethers |
Feb. 21, 1995 |
| 5298586 |
Process for the production of carboxylic acid anhydrides |
Mar. 29, 1994 |
| 5292948 |
Continuous process for the preparation of acetic anhydride or mixtures of acetic anhydride and acetic acid |
Mar. 8, 1994 |
| 4698187 |
Preparation of carboxylic acid anhydrides |
Oct. 6, 1987 |
| 4654174 |
Preparation of aliphatic anhydrides and alkylidene dicarboxylates from divinyl ethers and carboxylic acids |
Mar. 31, 1987 |
| 4201876 |
Fluorine containing polyethers |
May. 6, 1980 |
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