WO1996008445A3 - Process for treating an aqueous KF waste stream and for converting KF into HF and KOH - Google Patents

Process for treating an aqueous KF waste stream and for converting KF into HF and KOH Download PDF

Info

Publication number
WO1996008445A3
WO1996008445A3 PCT/US1995/011584 US9511584W WO9608445A3 WO 1996008445 A3 WO1996008445 A3 WO 1996008445A3 US 9511584 W US9511584 W US 9511584W WO 9608445 A3 WO9608445 A3 WO 9608445A3
Authority
WO
WIPO (PCT)
Prior art keywords
waste stream
aqueous
koh
treating
converting
Prior art date
Application number
PCT/US1995/011584
Other languages
French (fr)
Other versions
WO1996008445A2 (en
Inventor
Somanahalli Subbanna
Charles L Redmon
Jeff W Mckown
Robert A Smith
Yu-Chih Chiao
K N Mani
Original Assignee
Allied Signal Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allied Signal Inc filed Critical Allied Signal Inc
Priority to AU35873/95A priority Critical patent/AU3587395A/en
Priority to MX9701265A priority patent/MX9701265A/en
Publication of WO1996008445A2 publication Critical patent/WO1996008445A2/en
Publication of WO1996008445A3 publication Critical patent/WO1996008445A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
    • C01D1/04—Hydroxides
    • C01D1/28—Purification; Separation
    • C01D1/38—Purification; Separation by dialysis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/44—Ion-selective electrodialysis
    • B01D61/445—Ion-selective electrodialysis with bipolar membranes; Water splitting
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/19—Fluorine; Hydrogen fluoride
    • C01B7/191—Hydrogen fluoride
    • C01B7/195—Separation; Purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/14—Purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/14—Purification
    • C01D3/16—Purification by precipitation or adsorption

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Urology & Nephrology (AREA)
  • Water Supply & Treatment (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The present invention is directed to a process for treating an aqueous KF waste stream comprising at least one treatment step selected from the group consisting of inert gas stripping the aqueous KF waste stream, passing said waste stream through a carbon bed, concentrating said waste stream or a combination thereof to remove dissolved organic compounds. The present invention is also directed to subjecting the treated KF waste stream to electrodialytic splitting in a water splitting cell to form HF and either KOH or an acid depleted salt stream. The dilute HF can be concentrated to a concentrated and commercially viable product.
PCT/US1995/011584 1994-09-15 1995-09-13 Process for treating an aqueous kf waste stream and for converting kf into hf and koh WO1996008445A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU35873/95A AU3587395A (en) 1994-09-15 1995-09-13 Process for treating an aqueous kf waste stream and for converting kf into hf and koh
MX9701265A MX9701265A (en) 1994-09-15 1995-09-13 Process for treating an aqueous kf waste stream and for converting kf into hf and koh.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30635994A 1994-09-15 1994-09-15
US08/306,359 1994-09-15

Publications (2)

Publication Number Publication Date
WO1996008445A2 WO1996008445A2 (en) 1996-03-21
WO1996008445A3 true WO1996008445A3 (en) 1996-07-11

Family

ID=23184946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/011584 WO1996008445A2 (en) 1994-09-15 1995-09-13 Process for treating an aqueous kf waste stream and for converting kf into hf and koh

Country Status (4)

Country Link
AU (1) AU3587395A (en)
CA (1) CA2199723A1 (en)
MX (1) MX9701265A (en)
WO (1) WO1996008445A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845077A1 (en) * 2002-09-26 2004-04-02 Atofina PROCESS FOR LOWERING THE CONTENT OF ORGANIC MATERIALS AND NITROGEN PRODUCTS CONTAINED IN BROMIDE EFFLUENTS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787304A (en) * 1972-01-31 1974-01-22 Allied Chem Production of hf from fluorine by-products
US4713231A (en) * 1986-07-21 1987-12-15 The Dow Chemical Company Process for the recovery of ammonia and fluoride values from ammonium fluoride solutions
JPH01130783A (en) * 1987-11-18 1989-05-23 Shinko Pfaudler Co Ltd Treatment of alkaline waste liquid of fluorinated product containing metal ion and oil
US4976946A (en) * 1990-02-09 1990-12-11 The Dow Chemical Company Separation of potassium salts
JPH046104A (en) * 1990-04-24 1992-01-10 Nippon Light Metal Co Ltd Production of anhydrous potassium flouride for synthesizing organic fluorine compound

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787304A (en) * 1972-01-31 1974-01-22 Allied Chem Production of hf from fluorine by-products
US4713231A (en) * 1986-07-21 1987-12-15 The Dow Chemical Company Process for the recovery of ammonia and fluoride values from ammonium fluoride solutions
JPH01130783A (en) * 1987-11-18 1989-05-23 Shinko Pfaudler Co Ltd Treatment of alkaline waste liquid of fluorinated product containing metal ion and oil
US4976946A (en) * 1990-02-09 1990-12-11 The Dow Chemical Company Separation of potassium salts
JPH046104A (en) * 1990-04-24 1992-01-10 Nippon Light Metal Co Ltd Production of anhydrous potassium flouride for synthesizing organic fluorine compound

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 111, no. 24, 11 December 1989, Columbus, Ohio, US; abstract no. 218891, XP002001119 *
CHEMICAL ABSTRACTS, vol. 87, no. 20, 14 November 1977, Columbus, Ohio, US; abstract no. 154227n, XP002001120 *
OTKRYTIYA, IZOBRET., PROM. OBRAZTSY, TOVARNYE ZNAKI, vol. 54, no. 30, 1977, USSR, pages 47 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 148 (C - 0928) 13 April 1992 (1992-04-13) *

Also Published As

Publication number Publication date
WO1996008445A2 (en) 1996-03-21
CA2199723A1 (en) 1996-03-21
AU3587395A (en) 1996-03-29
MX9701265A (en) 1997-05-31

Similar Documents

Publication Publication Date Title
TW342344B (en) Process and plant for extraction or recovery of acids from solutions of these acids
AU643101B2 (en) Process for removing hydrogen cyanide and ammonia from aqueous solutions
HK1053660A1 (en) A method for removing heavy metals and producing glucose from the cellulosic component of municipal solid waste.
WO2001023061A3 (en) Recovery process for volatile compounds from solids in aqueous solution
CA2299475A1 (en) Method for producing an aqueous solution of free hydroxylamine
ATE253638T1 (en) METHOD FOR PRODUCING 2-HYDROXY-4-METHYLTHIOBUTYRIC ACID USING A NITRILASE
CA2328039A1 (en) Method for recovery of aqueous wash in phosphate chemical conversion and apparatus for metal surface treatment
YU139780A (en) Process for the purification of iso -delta-acids
IL137140A0 (en) Membrane filtration of polymer containing solutions
CA2175053A1 (en) Perchlorate Removal Process
WO1996008445A3 (en) Process for treating an aqueous KF waste stream and for converting KF into HF and KOH
CA2134270A1 (en) Nox destruction in sulphuric acid
KR910019961A (en) Method of Purifying Glycine
NO972557L (en) Treatment plant for municipal solid waste and production process for commercial lactanoic acid
JPS54102056A (en) Process for high-speed treatment of waste water
CA2055002A1 (en) Method and apparatus for the removal of constituents from a waste gas
JPS5534136A (en) Treatment method of organic waste water
MA19975A1 (en) Method for purifying wet phosphoric acid
JPS5637088A (en) Treating method for effluent containing heavy metal complex salt
JPS5791799A (en) Method and apparatus for treating waste water containing acetic acid
JPS5411882A (en) Desalting process
JPS5562054A (en) Purification of aqueous acrylamide
JPS5663827A (en) Rhodium separating and recovering method
JPS5421971A (en) Method of electrodialysis of inorganic electrolytic solution containing organic anions
JPS5688828A (en) Treatment of catalyst composition

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AM AU BB BG BR BY CA CN CZ EE FI GE HU IS JP KE KG KP KR KZ LK LR LT LV MD MG MN MW MX NO NZ PL RO RU SD SG SI SK TJ TM TT UA UG UZ VN

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): KE MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: PA/a/1997/001265

Country of ref document: MX

ENP Entry into the national phase

Ref document number: 2199723

Country of ref document: CA

Ref country code: CA

Ref document number: 2199723

Kind code of ref document: A

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase