ClassID:

84765

C01B21/46 - CPC Classification

Classification description:

Nitrogen; Compounds thereof; Nitrogen oxides; Oxyacids of nitrogen; Salts thereof; Nitric acid Purification; Separation ; Stabilisation

Recent Application in this class:
#1
20250091869
2025-03-20

MONO PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

#2
20250011171
2025-01-09

MONO PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

#3
20240343577
2024-10-17

DUAL PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF

#4
20240246820
2024-07-25

DEVICE AND METHOD FOR ON-LINE CONTINUOUS RECOVERY OF EXCESS NITRIC ACID IN NITRATION REACTION

#5
20240228284
2024-07-11

SYSTEM FOR EVACUATING NOx GASES FROM A NITRIC ACID STORAGE TANK

#6
20240182302
2024-06-06

PROCESS FOR RECYCLING NITROGEN OXIDES FROM NITROSYL SULFURIC ACID TO PRODUCE CONCENTRATED OR HIGHLY CONCENTRATED NITRIC ACID AND SULFURIC ACID

#7
20230382734
2023-11-30

MONO-PRESSURE PLANT FOR THE PRODUCTION OF NITRIC ACID AND METHOD FOR OPERATING SAME

#8
20230118652
2023-04-20

METHOD FOR PREPARING ELECTRONIC GRADE INORGANIC ACIDS FROM WASTE ACID SOLUTION

#9
20220227628
2022-07-21

Plant for the production of nitric acid, a related process and method of revamping

#10
20220219985
2022-07-14

Plant for the production of nitric acid, a related process and method of revamping

#11
20220017365
2022-01-20

Separation and concentration of nitrate from aqueous solutions and gaseous streams

#12
20200180959
2020-06-11

PROCESS FOR PRODUCING NITRIC ACID

#13
20200071167
2020-03-05

Plant for the production of nitric acid, a related process and method of revamping

#14
20160102250
2016-04-14

Reverse osmosis for purifying mixtures of hydrofluoric acid and nitric acid

#15
20160016798
2016-01-21

A method for purification of circulating leaching solutions from phosphates and fluorides

#16
20130259793
2013-10-03

Method for Obtaining or Recovering Nitric Acid and Hydrofluoric Acid from Solutions of Stainless Steel Pickling Systems

#17
20120301389
2012-11-29

METHOD FOR THE SEPARATION OF A NON-VOLATILE STRONG ACID FROM A SALT THEREOF AND COMPOSITIONS PRODUCED THEREBY

#18
20120168298
2012-07-05

Method and plant for reprocessing waste sulphuric acids from nitration processes

#19
20080146830
2008-06-19

Process for the mononitration of alkanediols

#20
20060128983
2006-06-15

Process for the mononitration of alkanediols

#21
20050074389
2005-04-07

Method for the production of highly pure nitric acid