CHENCO TECHNOLOGIES THE VALUE CHOICE FOR FLUORO-CHEMICAL INDUSTRY Datta Umalkar, Technology Expert CHENCO GmbH Fluorspar 2015, Morocco
Overview CHENCO Field of Activities Active in chemical industry for past 50 years Chenco Business includes supply of Technology / Know-how Basic Engineering Detailed drawings for key proprietary equipments Plant commissioning Consultancy services tailored for customer need Chenco customers are spread all over Europe Asia North/ South America.
Merit Of Chenco Technologies Chenco plants can use low quality / cheaper raw material (Fluorspar with high Phosphate and Arsenic) Chenco plants are the most economic Lowest capital cost Lowest operational cost (RM + energy) Plants are simple to operate and maintain Highest quality Greenest Environmental Footprint available They meet strictest environmental standards Chenco has improved performance (capacity/quality) of many HF/AlF3 plants operating with 3 rd party technologies.
Range of Chenco Process Technologies Anhydrous Hydrofluoric Acid (AHF) Aluminium (Tri) Fluoride (AlF 3 ) Lithiumhexafluorophosphate (LiPF 6 ) Borontrifluoride (BF 3 ) Ammonium Bifluoride (NH 4 HF 2 ) Electronic Grade HF (EGHF) Arsenic Removal Process from AHF Cryolite (Na 3 AlF 6 )
CaF 2 97% H 2 SO 4 98% OLEUM 20% CHENCO-FLUORO-COMPLEX HF-PLANT CaSO 4 H 2 SiF 6 2% INORGANIC FLUORO COMP. ORGANIC FLUORO COMP. Al(OH) 3 AIF 3 -PLANT AIF 3 90,5% H 2 SiF 6 Al(OH) 3 +NaCl Na 3 AlF 6 - PLANT ORG. F MULTIPURPOSE ORG. CHLORINE Cryolite F PRODUCTS HCl 30% NH 3 99,8% ABF-PLANT DILUTION-PLANT H 2 O NH 4 HF 2 98% HF 40-70% PCl 5 +LiCl LiPF 6 -PLANT FILLING-STATION B 2 O 3 LiPF 6 BF 3 -PLANT AHF 99,99% HF 70% HF 40% BF 3
Technology Anhydrous Hydrofluoric Acid (AHF) Globally there are Ten AHF plants operating with Chenco Technology.
AHF Technology Anhydrous Hydrofluoric Acid (AHF) AHF is produced in an indirectly heated Rotary Reactor under small vacuum by reaction of 98% Sulfuric Acid and 20% Oleum and dried Fluorspar (97%). The reaction is represented by the following equation: CaF 2 + H 2 SO 4 2 HF + CaSO 4 Η = 25.6 kj/mol HF The reaction is endothermic, e.g. requires a constant supply of heat energy for its completion. Calcium sulfate is produced as a by-product and this synthesized anhydrite is used in the building-, cement- and fertilizer- industry. Chenco process can be modified to accommodate CaF2 with high SiO2, P2O5, As-content impurities
AHF - Technology Anhydrous hydrofluoric Acid (AHF) Application AHF is a precursor of number of fluoro compounds Hydro Fluoro hydrocarbons (HFC refrigerants ) Aluminium fluoride Cryolite ABF UF 6 BF 3 LiPF 6 Stainless Steel pickling Glass etching Fluorine containing Plastics Alkylation Catalysis to produce Aviation, Gasoline, etc.
ALF 3 Technology Aluminium fluoride (AlF 3 ) Globally there are 10 Alf3 plants operating with Chenco Technology.
AlF 3 Technology Aluminium fluoride (AlF 3 ) Aluminium Fluoride is produced by reacting wet (3-7 % H 2 O) Aluminium Hydroxide with the Hydrofluoric Acid gas in a one bed expanded fluid bed reactor. 2Al(OH) 3 Al 2 O 3 + 3 H 2 O Al 2 O 3 + 6HF 2 AlF 3 + 3 H 2 O The first reaction is endothermic; the second-one is exothermic. The fluid bed reactor needs some heat during normal operation. For starting up, the reactor has to be preheated.
AlF 3 Technology Aluminium fluoride (AlF 3 ) Application Alumina Smelters to reduce the melting point of Al 2 O 3 from 2040 C to 1200 C. Reduction of melting point results in large savings of electrical energy in the manufacturing of Aluminium metal.
LiPF 6 Technology Lithiumhexafluorophosphate (LiPF 6 ) Globally there are 5 plants operating with Chenco Technology.
LiPF 6 Technology Lithiumhexafluorophosphate (LiPF 6 ) CHENCO has a technology for a 200 mt/year capacity LiPF 6 plant (potentially 300 mt/year in 330 working days) wherein LiPF 6 meeting international analytical requirements is produced in an indirectly cooled/heated DRS by the reaction of LiF, PCl 5 and HF in AHF medium, the main reactions being: PCl 5 + 5 HF = PF 5 + 5 HCl LiF + PF 5 = LiPF 6
LiPF 6 Technology Lithiumhexafluorophosphate (LiPF 6 ) Advantages of Chenco Process Simple, commercially available Equipment Low Investment Costs Easy Regulation High Yields (over 90% on LiF/LiCl) Over 99% Purity without Recrystallization Low Labour Requirement Application LiPF 6 is used as Electrolyte in Lithium Anode Batteries Space, Electric, automobile, computer, photo Industries
BF 3 Technology Boron trifluoride (BF 3 ) World s largest plant of BF3 gas is running with Chenco Technology at Navin Fluorine, in India.
BF 3 Technology Boron trifluoride (BF 3 ) The most economical used process, beside others, to produce BF 3 is the continuously working CHENCO process. Boric Acid or Borontrioxide react with HF and Oleum as per formula below: 3 HF + 3 SO 3 + H 3 BO 3 BF 3 + 3 H 2 SO 4 or 3HSO 3 F+ H 3 BO 3 BF 3 + 3 H 2 SO 4
BF 3 Technology Boron trifluoride (BF 3 ) Application of BF 3 Acid Catalyst for many types of organic reactions, particularly those of importance in the production of polymer and petroleum products Reactions, such as Polymerization, Alkylation, Isomerization, Esterification, Acylation, Sulfonation Used as a catalyst in the synthesis of anti bacterial medicines.
ABF Technology Ammoniumbifluoride (NH 4 HF 2 ) Both reactants NH 3 and HF in gaseous form are mixed in venturi. The exothermic reaction takes place in an insulated reactor, according to the equation given below: NH 3 + 2HF NH 4 HF 2 H25 = 51.4 Kcal/mol The reaction temperature in the major reaction zone will be over the melting point and above the boiling point of NH 4 HF 2. Globally there are 3 ABF plants running with Chenco Technology
ABF Technology Ammoniumbifluoride (NH 4 HF 2 ) Application Chemical Industry as fluorinating agent Glass Industry for treating, cleaning, polishing of lenses Textile Industry as neutralizer for alkalides in commercial laundries and textile plants Metal Industry for stainless steel pickling and titanium, using acid dips for steel prior to phosphating and galvanizing, for activation of metals before nickel plating Wood Industry for preservation Electronic Industry for preparation of NF 3
EGHF Technology Electronic Grade HF (EGHF/EHF) Electronic grade Hydrofluoric Acid is produced from Anhydrous HF (99,95%) by means of a multi-stage purification system in a dust-free room.
EGHF Technology Electronic Grade HF (EGHF/EHF) Application Electronic Chip Industry Etching agent
Arsenic Removal Technology Arsenic Removal Process Arsenic may be present in AHF due to use of arsenic rich fluorspar. Chenco has developed an efficient process for removal of the arsenic by a special distillation process. This enables use of Arsenic rich fluorspar in the manufacturing of AHF. Mexican is using Chenco Technology for Arsenic removal from AHF
Cryolite Technology Cryolite (Na 3 AlF 6 ) CHENCO has developed an economical, successfully working Process to produce Na 3 AlF 6 via H 2 SiF 6 Route or via Sodiumhexafluosilicate (Na 2 SiF 6 ) Route. The Process is carried out according to the following stages: Preparation of NaF Solution Preparation of AlF 3 Solution Reaction of NaF and AlF 3 Drying and Calcination
Cryolite Technology Cryolite (Na 3 AlF 6 ) Application Production of Aluminium Metallographic preparation of aluminium and aluminum alloys It is used in the manufacturing of grinding wheels due to its high abrasion quality. This product can also be made from low value Fluorine Sources, such as effluent gases from Phosphorous or Super Phosphate plants (H 2 SiF 6 ).
Thank you for your attention CHENCO GmbH Chemical Engineering and Consulting Zur Schönen Gelegenheit 8 93047 Regensburg Germany E-Mail: chenco@chenco.de Web: http://chenco.de Phone.: +49 941 560257 Fax.: +49 941 563503