Patents-Review.com
ClassID:

91800 ⎘

C07C51/445 - CPC Classification

Classification description:

Preparation of carboxylic acids or their salts, halides or anhydrides; Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation by steam distillation

Recent Application in this class:
#1
20250368557
2025-12-04

PROCESS AND PLANT FOR TREATMENT OF WASTEWATER STREAM FROM ACRYLIC ACID AND/OR ACRYLATE PRODUCTION PLANT

 #2
20250059126
2025-02-20

UTILIZATION OF POLYETHYLENE-CONTAINING MIXTURES TO FORM LONG-CHAIN ALKYL DICARBOXYLIC ACIDS BY WAY OF OXIDATIVE DEGRADATION

 #3
20250019337
2025-01-16

METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID

 #4
20250002439
2025-01-02

METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID

 #5
20230202956
2023-06-29

PROCESS FOR ACETIC ACID PRODUCTION BY REMOVING PERMANGANATE REDUCING COMPOUNDS

 #6
20220315516
2022-10-06

Methods and systems for producing acetic acid

 #7
20210380519
2021-12-09

PROCESS FOR PRE-HEATING BOILER FEED WATER IN THE MANUFACTURE OF PURIFIED AROMATIC CARBOXYLIC ACIDS

 #8
20210355063
2021-11-18

Method for producing acetic acid

 #9
20210292267
2021-09-23

Production and separation of 3-hydroxypropionic acid

 #10
20210122694
2021-04-29

Method for producing acetic acid

 #11
20210061747
2021-03-04

Plant and process for concentrating tartaric acid

 #12
20210060451
2021-03-04

Plant and process for concentrating tartaric acid

 #13
20210053902
2021-02-25

Water-based extraction and purification processes for cannabinoid acids

 #14
20200290944
2020-09-17

Reactive distillation process/equipment for fatty acid ester hydrolysis to produce carboxylic acid and alcohol

 #15
20200140367
2020-05-07

CONVERSION OF POLYSTYRENE TO BENZOIC ACID

 #16
20200140366
2020-05-07

Method for producing acetic acid

 #17
20200123093
2020-04-23

Method for producing acetic acid

 #18
20190062249
2019-02-28

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #19
20180297930
2018-10-18

Process for purification of methyl methacrylate

 #20
20180273459
2018-09-27

Method for producing acetic acid

 #21
20180258022
2018-09-13

Method for producing acetic acid

 #22
20180201564
2018-07-19

Method for producing acetic acid

 #23
20180201563
2018-07-19

Method for producing acetic acid

 #24
20180201562
2018-07-19

Method for producing acetic acid

 #25
20180065911
2018-03-08

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #26
20170174605
2017-06-22

Process for the recovery of carboxylic acid and wood treatment process

 #27
20170137361
2017-05-18

Processes for producing acetic acid

 #28
20160237017
2016-08-18

Vacuum distillation method for easily polymerizable compound and method for producing acrylic acid

 #29
20160137581
2016-05-19

Processes for producing acetic acid with decanter control

 #30
20150175516
2015-06-25

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #31
20140371488
2014-12-18

Divided wall distillation column for producing high purity acrylic acid and fractional distillation method using the same

 #32
20140323760
2014-10-30

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #33
20140046092
2014-02-13

Removing hydrocarbon impurities from acetic acid production intermediate

 #34
20130172519
2013-07-04

Processes for producing diaminobutane (DAB), succinic dinitrile (SDN) and succinamide (DAM)

 #35
20130058842
2013-03-07

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #36
20120215026
2012-08-23

Recovery of volatile carboxylic acids by extractive evaporation

 #37
20120215014
2012-08-23

PROCESSES FOR THE PRODUCTION OF HYDROGENATED PRODUCTS

 #38
20120209028
2012-08-16

Recovery of volatile carboxylic acids by a stripper-extractor system

 #39
20120095241
2012-04-19

Processes for the production of hydrogenated products

 #40
20120006673
2012-01-12

Dividing wall distillation column for producing high purity acrylic acid and fractional distillation method using the same

 #41
20110306777
2011-12-15

Processes for the production of hydrogenated products

 #42
20110301364
2011-12-08

Processes for the production of hydrogenated products

 #43
20110297529
2011-12-08

Processes for producing monoammonium succinate from fermentation broths containing diammonium succinate, monoammonium succinate and/or succinic acid, and conversion of monoammonium succinate to succinic acid

 #44
20110245515
2011-10-06

Processes for the production of hydrogenated products

 #45
20110245514
2011-10-06

Processes for the production of hydrogenated products

 #46
20110237831
2011-09-29

Processes for producing monoammonium succinate from fermentation broths containing diammonium succinate, monoammonium succinate and/or succinic acid, and conversion of monoammonium succinate to succinic acid

 #47
20110021817
2011-01-27

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream

 #48
20100312011
2010-12-09

Process of separation of glyoxylic acid from an aqueous reaction medium containing glyoxylic acid and hydrochloric acid

 #49
20100249453
2010-09-30

Removing hydrocarbon impurities from acetic acid production intermediate

 #50
20090270650
2009-10-29

Method and apparatus for carbonylating methanol with acetic acid enriched flash stream