Patents-Review.com
ClassID:

91814 ⎘

C07C51/64 - CPC Classification

Classification description:

Preparation of carboxylic acids or their salts, halides or anhydrides; Preparation of carboxylic acid halides Separation; Purification; Stabilisation; Use of additives

Recent Application in this class:
#1
20250346551
2025-11-13

PREPARATION AND PURIFICATION OF CIS-2-ALKENOIC ACIDS

 #2
20250129087
2025-04-24

SALT CRYSTALS

 #3
20240300884
2024-09-12

METHODS FOR REMOVAL OF SULFUR DIOXIDE (SO2) FROM TRIFLUOROACETYL CHLORIDE (TFAC)

 #4
20240279151
2024-08-22

METHODS FOR SOLVATION AND REMOVAL OF IODINE (I2)-CONTAINING SPECIES

 #5
20240025836
2024-01-25

FERULIC ACID GRANULES AND METHOD FOR THE PREPARATION THEREOF

 #6
20240010596
2024-01-11

INTEGRATED CARBOXYLIC ACID PRODUCTION FROM SYNTHESIS GAS

 #7
20230028813
2023-01-26

Processes for preparing aldaric, aldonic, and uronic acids

 #8
20220402850
2022-12-22

METHOD OF PURIFYING CARBOXYLIC ACID FLUORIDE

 #9
20220081386
2022-03-17

Methods for removal of sulfur dioxide (SO) from trifluoroacetyl chloride (TFAC)

 #10
20210087132
2021-03-25

Method of reducing impurities in a catalyst for producing terephthalic acid

 #11
20200317595
2020-10-08

Method of removing nitrate compounds from adipic acid

 #12
20200223778
2020-07-16

Reduction of content of carboxylic acids and derivatives thereof in oleum, disulfuric acid or concentrated sulfuric acid

 #13
20200207694
2020-07-02

Fluorination of acrylate esters and derivatives

 #14
20200031752
2020-01-30

FLUORINATION OF ACRYLATE ESTERS AND DERIVATIVES

 #15
20190330380
2019-10-31

SYSTEMS AND METHODS FOR SEPARATING MIXTURES COMPRISING FLUOROCARBOXYLIC AND CARBOXYLIC ACIDS

 #16
20190161428
2019-05-30

Fluorination of acrylate esters and derivatives

 #17
20190016662
2019-01-17

Method of producing acid halide solution and method of producing monoester compound

 #18
20180134648
2018-05-17

Composition containing acrylic acid derivative, and method for stabilizing acrylic acid derivative

 #19
20180099918
2018-04-12

Fluorination of acrylate esters and derivatives

 #20
20170340986
2017-11-30

DISTILLATION PROCESS COMPRISING AT LEAST TWO DISTILLATION STEPS TO OBTAIN PURIFIED HALOGENATED CARBOXYLIC ACID HALIDE, AND USE OF THE PURIFIED HALOGENATED CARBOXYLIC ACID HALIDE

 #21
20170283360
2017-10-05

Clean process for preparing chloroformyl-substituted benzene

 #22
20170267622
2017-09-21

Distillation process comprising at least two distillation steps to obtain purified halogenated carboxylic acid halide, and use of the purified halogenated carboxylic acid halide

 #23
20170036985
2017-02-09

Fluorination of acrylate esters and derivatives

 #24
20150299088
2015-10-22

Method for producing dry etching gas

 #25
20140031588
2014-01-30

Method for purifying difluoroacetic acid chloride

 #26
20120190892
2012-07-26

Process for the preparation of a halogenoacetyl fluoride and its derivatives

 #27
20100099911
2010-04-22

Method for producing carboxylic acid chloride

 #28
20070015903
2007-01-18

Method of making aromatic dihydroxy diacid dihalides and precipitates resulting therefrom

 #29
20070008888
2007-01-11

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