ClassID:

91805

C07C51/493 - CPC Classification

Classification description:

Preparation of carboxylic acids or their salts, halides or anhydrides; Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification whereby carboxylic acid esters are formed

Recent Application in this class:
#1
20250320532
2025-10-16

PREPARING DIESTERS OF MALONIC ACID

#2
20220153678
2022-05-19

Sebacic acid by-product fatty acid polyester polyol for polyurethane controlled-release fertilizer envelope, preparation method thereof and envelope

#3
20200290945
2020-09-17

Preparation and Purification of Biphenyldicarboxylic Acids

#4
20170029353
2017-02-02

METHODS FOR PREPARATION OF AMMONIUM SALTS OF C4 DIACIDS BY FERMENTATION AND INTEGRATED METHODS FOR MAKING C4 DERIVATIVES THEREOF

#5
20160311748
2016-10-27

Process for the preparation and isolation of carboxylic esters

#6
20160221911
2016-08-04

Recovery of acetic acid

#7
20150336872
2015-11-26

PROCESS FOR THE PURIFICATION OF CARBOXYLIC ACIDS

#8
20150203432
2015-07-23

RECOVERY OF ORGANIC ACIS FROM DILUTE SALT SOLUTIONS

#9
20150038567
2015-02-05

Cannabinoid carboxylic acids, salts of cannabinoid carboxylic acids, and the production and uses of same

#10
20140288176
2014-09-25

Enantiomers of 2-hydroxy derivatives of fatty acids

#11
20140155650
2014-06-05

Production of acrylic acid and ethanol from carbonaceous materials

#12
20130331601
2013-12-12

METHOD FOR RECOVERY OF ORGANIC ACID FROM DILUTE AQUEOUS SOLUTION

#13
20130296601
2013-11-07

Ketocarboxylic acids, ketocarboxylic esters, methods of manufacture and uses thereof

#14
20130261333
2013-10-03

Hydrocarboxylation of formaldehyde in the presence of a higher order carboxylic acid and heterogeneous catalyst

#15
20130261328
2013-10-03

Hydrocarboxylation of formaldehyde in the presence of a higher order carboxylic acid and a homogeneous catalyst

#16
20120142945
2012-06-07

Recovery method of highly pure lactic acid and alkyl lactate

#17
20120123147
2012-05-17

Ketocarboxylic acids, methods of manufacture and uses thereof

#18
20100234610
2010-09-16

Method for producing optically active ester and method for producing optically active carboxylic acid

#19
20050177000
2005-08-11

Method of recovering fluorinated acid surfactants from adsorbent particles loaded therewith