CPCB | Central Pollution Control Board

SOP under Rule 9Updated On : 06 Jun 2025

Name of the SoP	SoP No.	SoP Type	Year of Publication
Utilization of Spent Hydrochloric Acid (generated during scrubbing of gas liberated while chlorination of phenol) in the manufacturing of Para Amino Phenol	118		2025
Utilization of spent Calcium Chloride powder [Generated from manufacturing of Triethyl Phosphite (TEP) and Trimethyl Phosphite (TMP)] in manufacturing of Pigment Violet	117		2025
Utilization of Spent Hydrochloric Acid (generated during manufacturing of manufacturing of Mono Chloro Acetic Acid/ Chloro Benzene/ Chloro Paraffin Wax/ Trifluoroacetic acid) in the manufacturing of Ossein and subsequently Gelatine from such Ossein	116		2025
Utilization of Black mass (generated by Lithium Ion Batteries dismantlers/recyclers or e-waste dismantlers/recyclers) for the recovery of Carbon/Graphite material and Metal compounds (Sulphates, Carbonates, Phosphates of Co, Mn, Nio Li, Cu, Fe, Al & Na) by adopting Hydro-Metallurgy	115		2024
Utilization of Spent Methyl Chloride gas/ liquid (generated during manufacturing of Monocrotophos Pesticide products) in production of Glufosinate (Technical Grade Pesticide)	114		2024
Utilization of Spent Sodium Sulphide and Spent Sodium bi Sulphide (generated during scrubbing of H2S gases with caustic soda solution in the production of Carbon Di-Sulphide) for production of Sodium Sulphide and Sodium Bi Sulphide	113		2024
Utilization of Spent mono/di/tri Sodium Phosphate solution (generated during production of 4,7- dichloroquinoline) for manufacturing of Tri Sodium Phosphate crystals	112		2024
Utilization of Spent Potassium Chloride [generated during recovery of bromine from spent KBr solution from pesticide industry (meta phenoxy benzaldehyde)] for recovery of Potassium Chloride salt suitable in production of dye & dye intermediates and in the electroplating industry	111		2024
Utilization of Spent HCl (generated during chlorination of organic compounds) in pickling operation of Ferrous materials	110		2024
Utilization of Spent Sodium Sulphite {generated during caustic scrubbing of SO2 from Pesticide, Dye & Dye intermediates, Pharmaceutical sector and, Organic Chemical sector during Chlorosulphonation reactions} in production of Sodium bisulphite for production process of dyes & dye intermediates, textile, and pulp & paper industries	109		2024
Utilization of Spent Sodium Salicylate Solution (generated during manufacturing of Perfumery Esters by Hot Esterification Process) and Spent HCl (generated during manufacturing of Chloral) in manufacturing of Salicylic Acid for Industrial Usage (Dyes manufacturing)	108		2024
Utilization of Spent Sodium Acetate [generated from manufacturing of pharma product - 7-ACCA] in recovery of Sodium Acetate Tri-hydrate	107		2024
Utilization of Spent Magnesium Chloride solution (generated during manufacturing of Glufosinate -Technical Pesticide) in recovery of Magnesium Chloride Flakes	106		2024
Utilization of Spent Sodium Sulphite/ Spent Sodium bisulphite [generated during caustic scrubbing of gases from Chlorosulphonation reaction (primarily SO2) in Pesticide, Dyes & Dyes intermediates, Pharmaceutical sector and, Organic Chemical sector] for industrial use in dyes industries	105		2024
Utilization of process distillation residue [generated during manufacturing of Diphenol (Hydroquinone & Catechol)] as supplementary fuel along with coal in boiler	104		2024
Utilization of Waste Filter Cake (generated during production of detergent based lubricant additives) for recovery of Calcium Sulfonate & Magnesium Saligenin/ Phenate (lubricant additives)	103		2024
Utilization of spent sulphuric acid (SSA) [generated from Linear Alkyl Benzene Sulphonic Acid (LABSA) process] in manufacturing of Single Super Phosphate for use as Fertilizer	102		2024
Utilization of ETP Sludge (from dephenolization treatment of the wastewater generated from phenol manufacturing plant) as supplementary fuel along with coal in boiler	101		2024
Utilization of (Graphite Based) Chemical Sludge [generated from ETP of Forging industry] for manufacturing Forging lubricant	100		2024
Utilization of Spent Sulphuric Acid & Mother Liquor generated from production of Nitro Toluene (in Nitration process) in the manufacturing of Mixed Cresol for use as wood preservative	99		2024
Utilization of Spent Sulphuric Acid (generated from Chlor-alkali plants) in the manufacturing of Aluminium Sulphate	98		2024
Utilization of the Process residue containing Ethanol >30 % [generated during the manufacturing of Glufosinate - Technical Pesticide] for recovering Ethanol (93%) and Sodium Acetate (30%)	97		2024
Utilization of Spent Zinc Chloride Solution (generated from dye & dye intermediates industry) in production of Zinc Carbonate, Zinc Oxide and Sodium Chloride	96		2023
Utilization of Spent Hydrochloric Acid [generated during manufacturing of Cypermethric Acid Chloride (pesticide) & Chlorobenzene (synthetic organic chemical)] as a supplementary resource in production of Dicamba (pesticide/herbicide)	95		2023
Utilization of Spent Calcium Chloride (generated during manufacturing of Pesticide Compounds) as brine solution for Chilling Plant	94		2023
Utilization of LD Converter gas cleaning sludge as a supplementary resource (alongwith Iron ore) in the manufacturing of Iron Ore Pellets	93		2023
Utilization of Spent Sodium Hydrosulphide (generated during caustic scrubbing of H2S gas in pesticide, inorganic chemical, and dyes and dyes intermediate industries) as reducing agent in production of dye and dyes intermediates	92		2023
Utilization of Spent Hydro Fluoro Silicic Acid (generated during manufacturing of Hydro Fluoric acid) in the manufacturing of Potassium Fluoride	91		2023
Utilization of Spent Mother liquor containing Mono Chloro Acetic acid (MCA-ML) [generated from the manufacturing of MCA] for Manufacturing of Tri Chloro Acetyl Chloride (TCAC) for industrial usage excluding Pharma and Food Products	90		2023
Utilization of Spent Hydrochloric acid (generated from synthetic organic chemical manufacturing industry) in regeneration of spent cation exchange resin of De-Mineralization plant	89		2023
Utilization of Spent Ammonium Acetate (generated during manufacturing of Acephate - a technical grade Pesticide) in Recovery of Ammonium Sulphate and Acetic Acid	88		2023
Utilization of Spent Trifluoro Acetic acid (a spent solvent generated during production of Cefdinir) for recovery of Trifluoro Acetic acid	87		2023
Utilization of Spent Sulphuric Acid (generated during the manufacturing of Pesticides, Dyes and Dye intermediate, Fertilizer and Organic chemicals manufacturing industries) in production of Magnesium Sulphate	86		2023
(a)Utilization of Spent Hydrochloric Acid (generated from scrubbing of process gas liberated during the chlorination process of various organic compounds) in production of Calcium Chloride	85	Revised	2024
(b) Utilization of Spent Hydrochloric Acid (generated during manufacturing of Dyes and Dyes intermediates & synthetic organic chemical sector) for production of Calcium Chloride	85		2023
Utilization of Spent Sulphuric Acid in manufacturing of Precipitated Silica, Colloidal silica and Silica gel	84		2022
Utilization of Spent Sulphuric acid (generated from Dye & Dye Intermediates & Organic Chemical Industries) in manufacturing of Ferrous Copper Zinc Sulphate	83		2022
Utilization of ETP Sludge in manufacturing of iron ore pellet	82		2022
Utilization of ETP sludge generated from wastewater treatment of ceramic industries in manufacturing of Ceramic products	81		2022
Recovery of Caffeine from Caffeine liquor	80		2022
(a) Utilization of Spent Ammonia Liquor in manufacturing of Ammonia Liquor	79	Revised	2024
(b) Utilization of spent ammonia liquor (generated during manufacturing of pesticide products) in manufacturing of liquor ammonia	79		2022
Utilization of Spent Calcium Hypochlorite (generated during manufacturing of High Strength Bleach Powder) as neutralizing agent in ETP	78		2022
Utilization of Spent Aluminum Chloride (generated from manufacturing of CPC Green - 7 and Pigment Phthalocynine Green) as a coagulant in CETP Utilization of Spent Aluminum Chloride (generated from manufacturing of CPC Green - 7 and Pigment Phthalocynine Green) as a coagulant in CETP	77	Revised	2022
	77		2022
Utilization of ETP Sludge of fertilizer industry in manufacturing of Di-Ammonium Phosphate (DAP)/NPK Fertiliser Utilization of ETP Sludge of fertilizer industry in manufacturing of Di-Ammonium Phosphate (DAP)/NPK Fertiliser	76	Revised	2022
	76		2022
Utilization of Used Oil and Off Specification Products (Shampoo, Detergent & Creams) for Recycling	75		2021
Utilization of Aluminium dross & its residues for recovery of Aluminium metal and manufacturing of Aluminium oxide briquette	74		2021
Utilization of LD/GCP Sludge, LD/GCP Classifier Sludge and Blast Furnace Flue Dust for manufacturing of L.D. Sludge agglomerates	73		2021
Pre-processing of waste Silicon Carbide Refractory bricks from Pot lining waste generated from primary Aluminium Smelters	72		2021
Utilization of Spent acid containing HCl generated as waste pickling liquor from Steel Industries (Hazardous Waste Category 13.1 of Schedule-I of HOWM Rules, 2016) for Regeneration of HCl and production of Ferric Oxide	71		2021
Utilization of Resin and Glue waste (Hazardous Waste Category 23.1 of Schedule-I of HOWM Rules, 2016) as Supplementary fuel in tile manufacturing industry	70		2021
Utilization of Spent Hydrochloric acid generated from glass manufacturing industry [Hazardous Waste Category Class B15 Inorganic acids (Schedule II of HOWM Rules, 2016] for manufacturing of Calcium Chloride	69		2021
Utilization of waste salts generated from CETPs/ETPs of Textile manufacturing/processing industries for recovery of salts for industrial use	68		2021
Utilization of Spent Hydrochloric acid [generated during manufacturing of Trichloroethylene/Perchloroethylene (or) Chlorinated Paraffin Wax] for manufacturing of 7ADCA	67		2021
Utilization of Spent Hydrochloric acid (generated during manufacturing of Chlorinated Paraffin Wax) for manufacturing of Calcium Chloride	66		2021
Utilization of spent sulphuric acid generated during manufacturing of Hydrobromic acid as resource material in manufacturing of Bromine (liquid) through bittern route	65		2021
Utilization of metal and metal bearing wastes for recovery of metal alloys n Salts	64		2021
(a) Utilization of Spent Acetic Acid (generated from Pharmaceutical/ Pesticide/Chemical Sector) for recovery of Acetic Acid and/or manufacturing of Acetic Anhydride (b) Utilization of dilute acetic for manufacturing of acetic anhydride	63	Revised	2025
	63		2021
(a) Utilization of ETP Sludge (generated from pickling process/ wastewater treatment) for manufacturing of Red/Chromium/Nickel Oxide & Gypsum (b) Utilization of ETP Sludge for manufacturing of red oxide and Gypsum	62	Revised	2021
	62		2021
Utilization of brine sludge for manufacturing of bricks	61		2021
Utilization of Magnesium Chloride in MAP process in CETP	60		2021
Utilization of ETP Sludge as fuel in Recovery Boiler	59		2020
Utilization of Sludge gen from SANF CETP for manufacturing of bricks	58		2020
Utilization of ETP sludge generated from Textile Industry to use as a Supplementary fuel along with Coal in Thermic Fluid Heater (TFH)/ Boiler.	57		2020
Utilization of Spent Sodium Hypo Chlorite along with Fresh/Spent Caustic Solution for manufacturing of Sodium Hypochlorite.	56		2020
Utilization of Spent TiO2-NaCl cake generated from process residue/waste containing chloride from the catalyst manufacturing industries for recovery of Titanium Dioxide.	55		2020
Utilization of Aluminium dross residues generated from separation of metal from Aluminium dross or Aluminium dross reprocessing units for manufacturing of Alum	54		2019
(a) Utilization of Spent Acid generated from dyes & dyes intermediates, organic chemical and pharmaceutical industries in production of dyes and dye intermediate products (a) Utilization of Spent Acid generated from dyes & dyes intermediate industries in production of another dyes and dye intermediate products (b) Utilization of Spent Sulphuric Acid generated from dyes & dyes intermediate industries in production of another dyes and dye intermediate products	53	Revised	2024
			2020
			2019
(a) Utilization of Tarry residue waste and coal tar sludge for production of Naphthalene Oil, Creosote oils, Anthracene Oil and coal tar pitch (b) Utilization of Tarry residue waste for production of Creosote oils and coal tar pitch	52	Revised	2022
	52		2019
Utilization of residue/rejects generated from processing of Aluminium Dross of Aluminium Smelting process for production of synthetic slag	51		2019
(a) Utilization of Spent Ammonium Carbonate (generated during manufacturing of CPC Blue) for manufacturing of Zinc carbonate, Copper carbonate, Manganese carbonate, Magnesium carbonate and Ferrous carbonate (b) Utilization of Spent Ammonium Carbonate (generated during manufacturing of Copper Pthalocyanin Blue) in manufacturing of zinc carbonate and copper carbonate	50	Revised	2019
	50		2019
(a) Utilization of spent acid generted from dye & dye intermediate, chemical manufacturing and textile industries as neutralizing agent in ETP/CETP (b) Utilization of Spent acid generated fron Dye and Dye Intermediates Industries chemical manufacturing Industries as neutralizing agent in ETP/CETP (c) Utilization of Spent Sulphuric acid generated fron Dye and Dye Intermediates Industries chemical manufacturing Industries as neutralizing agent in ETP/CETP	49	Revised	2022
		Revised	2022
			2019
(a) Utilization of Spent Alkali Bromide and Spent Acidic Bromide generated during manufacturing of various pesticides, pharmaceuticals and organic chemicals for recovery of liquid Bromide (b) Utilization of Spent Alkali Bromide and Spent Acidic Bromide generated during manufacturing of various pesticides, pharmaceuticals and organic chemicals for recovery of liquid Bromide	48	Revised	2019
	48		2018
Utilization of Spent Sulphuric Acid generated during manufacturing of 4, 4-Diaminobenzenesulfanilide (DABSA) in manufacturing of Para Amino Benzene Sulphonic acid (PABSA)	47		2018
Utilization of Spent liquid Glauber salt (Generated during para base vinyl sulphone manufacturing process) for Production of Reactive Dye (Reactive Orange 2 R)	46		2018
Utilization of spent ammonium chloride generated during production of Hexamethyl Di Silazane for manufacturing of Ammonium chloride	45		2018
Utilization of spent sulphuric acid generated during manufacturing of G salt for production of R complex Gamma acid	44		2018
(a) Utilization of Spent Aluminium chloride generated during manufacturing process of Dye and Dye intermediate, Pharmaceuticals & pesticides Industries in manufacturing of Aluminum Hydroxide Chloride / Poly Aluminium Chloride (b) Utilization of Spent Aluminium chloride in manufacturing of Aluminum Hydroxide Chloride / Poly Aluminium Chloride (c) Utilization of Spent Aluminium chloride in manufacturing of Aluminum Hydroxide Chloride / Poly Aluminium Chloride	43	Revised	2022
			2020
			2018
Utilization of used/waste thinner for manufacturing of Industrial primer to be used as Automotive paints	42		2017
Utilization of Waste Dichromate Solution generated during manufacturing of Ibuprofen for production of Basic Chromium Sulphate	41		2017
Utilization of Spent Sulphuric Acid generated during manufacturing of Vinyl Sulphone, for production of H-Acid (HW category 26.3 of Sch-I)	40		2017
Utilization of Spent Phosphoric Acid generated during manufacturing of Quinacridone Pigment, for production of Dibasic Calcium Phosphate (HW Category No. 26.3 of Sch-I)	39		2017
Utilization of Spent Sulphuric Acid (generated during manufacturing of 3,5-Dichloro Nitro Benzene) and Spent Sodium Thiosulphate	38		2017
Utilization of Flue gas cleaning residue generated from Steel Scrap Melting Induction Furnace, for zinc extraction (HW category No. 35.1 of Sch-I)	37		2017
Utilization of Synthetic Oil Based mud / Oil based drill cutting waste in Road construction (HW category No. 2.1 and 2.3 of Sch-I)	36		2017
Utilization of Gasifier Slag containing Nickel & Spent Catalyst containing Molybdenum generated during production of ammonia in nitrogenous fertilizer industry	35		2017
Utilization of Coal Tar and Tarry Residue generated from Coal Gasifier Units	34		2017
Utilization of spent sulphuric acid generated during manufacturing 4, 4-Diamino benzene sulphananilide	33		2017
(a) Utilization of Spent Pot Lining (SPL) generated from Primary Aluminium Smelting Industries (b) Utilization of Spent Pot Lining (SPL) generated from Primary Aluminium Smelting Industries (c) Utilization of Spent Pot Lining (SPL) generated from Primary Aluminium Smelting Industries	32	Revised	2021
			2019
			2017
Utilization of Tungsten scrap (Tungsten carbide insert tips) generated from metal cutting operations	31		2017
Captive utilization of Spent ion exchange resin generated from Demineralization (DM) plant in DRI Kiln of Sponge Iron	30		2017
(a) Utilization of spent ion Exchange resin generated from Demineralization (DM) plant (b) Utilization of spent ion exchange resin generated from Demineralization (DM) plant (c) Utilization of spent ion exchange resin generated from Demineralization (DM) plant	29	Revised	2020
			2017
			2016
Utilization of spent alumina generated from polymerization in swing unit of petrochemical plant	28		2017
Utilization of Resin waste generated during resin Impregnation of Electrical coils	27		2017
Utilization of spent acid containing molybdenum generated during manufacturing of filaments in bulb/lamp Industry	26		2017
Utilization of spent carbon (carbon residue) generated from urea fertilizer Industry	25		2017
Utilization of ETP sludge generated from pulp and paper Industry	24		2016
Utilization of Phenolic waste water generated from coal gasifier Condensate water	23		2017
Utilization of Vanadium Sludge Generated From Alumina Refineries	22		2016
Utilization of spent sulphuric acid generated during manufacturing of coal 313 dye using Anthraquinone	21		2017
(a) Utilization of Hydro Fluoro Silicic Acid Generated From Single Super Phosphate Fertilizer Industries (b) Utilization of Hydro Fluoro Silicic Acid Generated From Single Super Phosphate Fertilizer Industries	20	Revised	2020
	20		2016
Utilization of Spent Fixer (Hypo) solution Generated From Photographic / X-Ray Films	19		2016
(a) Utilization of contaminated barrels/containers/drums containing hazardous wastes/chemicals/oil and lubricants (b) Utilization of contaminated barrels /containers drums containing hazardous wastes/chemicals/oil and lubricants		Revised	2024
	12		2021
(a) Utilization of Spent Solvent for recovery of solvent (b) Utilization of Spent Solvent for recovery of solvent (c) Utilization of Spent Solvent for recovery of solvent (d) Standard Operating Procedures and Checklist of Minimal Requisite Facilities for utilization of HW under Rule 9 of the Hazar. and Other Wastes (Management and Transboundary movement) Rules, 2016	1-18	Revised	2021


			2016