ClassID:

90743

C07C7/14 - CPC Classification

Classification description:

Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals

Recent Application in this class:
#1
20260042719
2026-02-12

SYSTEM AND METHOD FOR RECOVERING NAPHTHALENE FROM A RERUN COLUMN BOTTOM SAMPLE

#2
20250388822
2025-12-25

METHODS FOR PRODUCING MONOCYCLIC AROMATIC HYDROCARBON, TEREPHTHALIC ACID, AND POLYETHYLENE TEREPHTHALATE, AND MANAGEMENT METHODS THEREFOR

#3
20240279148
2024-08-22

PREPARATION METHOD OF CAROTENOID AGENT

#4
20240132426
2024-04-25

Process and apparatus for preparing purified styrene composition from styrene containing feedstock

#5
20230365480
2023-11-16

PROCESS AND APPARATUS FOR PREPARING PURIFIED STYRENE COMPOSITION USING DIVIDED-WALL COLUMN AND CRYSTALLIZATION UNIT

#6
20230250345
2023-08-10

Oilfield natural gas processing and product utilization

#7
20230242823
2023-08-03

Oilfield natural gas processing and product utilization

#8
20230174441
2023-06-08

Process and apparatus for preparing purified styrene composition from styrene containing feedstock

#9
20230174440
2023-06-08

Process and apparatus for preparing purified styrene composition from styrene containing feedstock

#10
20230048087
2023-02-16

METHANE SEPARATION SYSTEM AND METHOD

#11
20230001325
2023-01-05

Method of operating a crystallizing vessel assembly, as well as a crystallizing vessel assembly

#12
20220177392
2022-06-09

Method for separating 2-alkylanthracenes and use thereof for producing hydrogen peroxide

#13
20210371359
2021-12-02

Method for recovery of paraxylene with reduced crystallization load

#14
20210371358
2021-12-02

Method of recovering paraxylene from a mixture of aromatic hydrocarbons

#15
20210170323
2021-06-10

Method of recovering paraxylene in a pressure swing adsorption unit with varying hydrogen purge flow direction

#16
20210053890
2021-02-25

Production and use of 3,4′ and 4,4′-dimethylbiphenyl isomers

#17
20200369582
2020-11-26

Method of recovering paraxylene in a crystallization zone

#18
20200369581
2020-11-26

Methods and systems for producing -xylene from C8-containing compositions

#19
20200369579
2020-11-26

Method for preparing paraffin

#20
20200354289
2020-11-12

Methods and systems for producing para-xylene from C8-containing compositions

#21
20200339889
2020-10-29

Oilfield natural gas processing and product utilization

#22
20200317591
2020-10-08

Purification and liquefaction of biogas by combination of a crystallization system with a liquefaction exchanger

#23
20200270189
2020-08-27

Methods and systems for producing para-xylene from C8-containing compositions

#24
20200223770
2020-07-16

Hybrid process for producing high-purity para-xylene with toluene solvent

#25
20200103165
2020-04-02

SYSTEMS AND METHODS OF DEBOTTLENECKING PROPANE FEED

#26
20200048169
2020-02-13

Systems and methods for deep crystallization of xylene streams

#27
20200024216
2020-01-23

Integrated processes for para-xylene production

#28
20190309002
2019-10-10

Method and an apparatus for recovering chemicals from an alkaline lignin material

#29
20190300456
2019-10-03

Production and separation of dimethyl biphenyl isomers

#30
20190022553
2019-01-24

Dynamic melt crystallization process for purifying dicyclopentadiene from a mixed liquid hydrocarbon stream

#31
20180179121
2018-06-28

Semi-continuous crystallization method and apparatus

#32
20180002253
2018-01-04

Process for the recovering of paraxylene

#33
20170240507
2017-08-24

Method for recycling urea in urea adduct process

#34
20170240487
2017-08-24

Process for making para-xylene

#35
20170144106
2017-05-25

Reverse osmosis membranes and separations

#36
20170137350
2017-05-18

Separation of mixed xylenes

#37
20170136420
2017-05-18

Hydrocarbon reverse osmosis membranes and separations

#38
20170088489
2017-03-30

Conversion of non-aromatic hydrocarbon

#39
20160318831
2016-11-03

Enhanced heat recovery in paraxylene plant

#40
20160185686
2016-06-30

Apparatus for the production of xylenes

#41
20160031772
2016-02-04

Process for recovering paraxylene from at least two feedstreams containing xylene isomers

#42
20150080546
2015-03-19

Production and Use of 3,4' and 4,4'-Dimethylbiphenyl Isomers

#43
20140336436
2014-11-13

Treatment of aromatic hydrocarbon stream

#44
20140155667
2014-06-05

Process for the production of purified xylene isomers

#45
20140023563
2014-01-23

Paraxylene production process and apparatus

#46
20130303820
2013-11-14

Process and apparatus for para-xylene production

#47
20130296627
2013-11-07

Process for the separation of contaminant or mixture of contaminants from a CH4-comprising gaseous feed stream

#48
20130237737
2013-09-12

Process for the purification of paraxylene

#49
20130012750
2013-01-10

Process and apparatus for para-xylene production

#50
20120330075
2012-12-27

Process for producing para-xylene

#51
20120316375
2012-12-13

Production of para-xylene

#52
20120316373
2012-12-13

Process for producing one or more alkylated aromatics

#53
20120296143
2012-11-22

Process for the purification of paraxylene

#54
20120234516
2012-09-20

ENERGY RECOVERY FROM MOTHER LIQUID IN PARAXYLENE CRYSTALLIZATION PROCESS

#55
20120108868
2012-05-03

Process for the Production of Paraxylene

#56
20120108867
2012-05-03

Process for the Production of Purified Xylene Isomers

#57
20110319688
2011-12-29

Paraxylene production process and apparatus

#58
20110257456
2011-10-20

Process and apparatus for para-xylene production

#59
20100261941
2010-10-14

Process for the purification of paraxylene

#60
20100228070
2010-09-09

Method for Achieving High Purity Separation and Refinement of Controlling Morphology and Particle Size of 2,6-Dimethylnaphthalene Dicarboxylic Crystals

#61
20100228066
2010-09-09

Integrated process for the production of P-xylene

#62
20100192625
2010-08-05

Method for adiabatic cooling type crystallization of organic compound and apparatus therefor

#63
20100152508
2010-06-17

Process for producing para-xylene

#64
20100137660
2010-06-03

Process for the crystallization separation of P-xylene

#65
20100041936
2010-02-18

Melt-crystallization separation and purification process

#66
20100010281
2010-01-14

Method and System for Separation and Purification of High-Purity 2,6-Dimethylnaphthalene by Continuous Crystallization

#67
20090194488
2009-08-06

METHOD FOR TREATMENT OF CRYSTAL SLURRY

#68
20090112040
2009-04-30

Method for adiabatic cooling type crystallization of organic compound and apparatus therefor

#69
20090076286
2009-03-19

Process for operating a continuous removal of a target product X in the form of fine crystals

#70
20090018347
2009-01-15

Process for purifying removal of acrylic acid, methacrylic acid N-vinylpyrrolidone or P-xylene crystals from their suspension in mother liquor

#71
20080269535
2008-10-30

Process for producing high purity meta-xylene, comprising simulated moving bed adsorption and crystallization

#72
20080249345
2008-10-09

Process and apparatus for para-xylene production

#73
20070299293
2007-12-27

Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes

#74
20070255083
2007-11-01

Method for separating and purifying 2,6-dimethylnaphthalene

#75
20070228366
2007-10-04

Method for Purifying Material Comprising Organic Semiconductor, Method for Purifying Material Comprising Pentacene, Semiconductor Device, and Method for Fabricating the Semiconductor Device

#76
20070173678
2007-07-26

Process for producing adamantane

#77
20060025647
2006-02-02

Morphology control of substituted diacetylenic monomers for shelf life monitoring systems

#78
20050228206
2005-10-13

Process for recovering paraxylene utilizing ammonia absorption refrigeration

#79
16835639
2021-12-21

Diamondoid fuels

#80
16178273
2020-07-14

Diamondoid fuels