GB744430A - Process and apparatus for separating water and dissolved salts from aqueous acidic or basic solutions by flash evaporation and crystallisation - Google Patents

Process and apparatus for separating water and dissolved salts from aqueous acidic or basic solutions by flash evaporation and crystallisation

Info

Publication number
GB744430A
GB744430A GB28032/53A GB2803253A GB744430A GB 744430 A GB744430 A GB 744430A GB 28032/53 A GB28032/53 A GB 28032/53A GB 2803253 A GB2803253 A GB 2803253A GB 744430 A GB744430 A GB 744430A
Authority
GB
United Kingdom
Prior art keywords
line
waste
ice
solution
evaporator
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB28032/53A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of GB744430A publication Critical patent/GB744430A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/06—Flash distillation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
    • D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Abstract

Salts heavier than water are recovered from waste acidic or basic solutions, e.g., waste water from the viscose process, by flash evaporation under vacuum so that the waste solution partly evaporates and partly crystallizes to ice and salt crystals which with the residual liquid are accumulated in a pool from which the ice and salt crystals are mechanically separated while the residual solution is recycled. The waste liquor is fed through line 1, together with residual liquid recirculated through line 23, to distributer heads 3, feeding tubes 4 in an evaporator 5 maintained under vacuum by a pump connected to the vapour offtake 29 and provided with a conical bottom 19 and barometric tube 24 in which a pool of liquid is maintained. The residual liquor is recirculated through <PICT:0744430/III/1> <PICT:0744430/III/2> the annular space provided between bottoms 19, 21 and thence through line 22, pump 2 and line 23, while the deposited salts flow down through the tube 24 to settling tank 25 from which they are recovered by bucket and worm conveyer 26, 27. A rotary scraper 8 driven by a motor 9 removes the ice crystals over a perforated surface 11 to the inlet 12 of a worm 14 working in a perforated jacket 15 where water is separated and returned by pump 16 to the tube 24 while ice crystals are separated through opening 17. Preferably the distributer heads 3 feed the solution to tubes 4 down which the solution flows in films and is directed to the centre of the evaporator by guides 6. The vapours removed through offtake 29 pass to the inlet 29 of an absorber (Fig. 3) of similar configuration to the evaporator, the vapours passing to tubes 30 sealed into an intermediary plate 31 where they are absorbed by sulphuric acid or like absorbent introduced through line 38 and recirculated through cooler 35 and line 36, surplus absorbent being injected through lines 45, 46 to absorb vapours in the exhaust condensers 43, 44 of the high vacuum jet pumps 40, 41.
GB28032/53A 1952-10-11 1953-10-12 Process and apparatus for separating water and dissolved salts from aqueous acidic or basic solutions by flash evaporation and crystallisation Expired GB744430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF10112A DE1039489B (en) 1952-10-11 1952-10-11 Method and device for separating water and dissolved salts from dilute acids or alkalis, in particular washing off viscose production

Publications (1)

Publication Number Publication Date
GB744430A true GB744430A (en) 1956-02-08

Family

ID=7086367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28032/53A Expired GB744430A (en) 1952-10-11 1953-10-12 Process and apparatus for separating water and dissolved salts from aqueous acidic or basic solutions by flash evaporation and crystallisation

Country Status (3)

Country Link
DE (1) DE1039489B (en)
GB (1) GB744430A (en)
NL (2) NL90867C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121626A (en) * 1955-10-18 1964-02-18 Zarchin Alexander Apparatus for sweetening water
EP1094047A1 (en) * 1999-10-22 2001-04-25 Technische Universiteit Delft Crystallisation of materials from aqueous solutions
EP3231901A1 (en) * 2016-04-14 2017-10-18 TreeToTextile AB Process for spinning dissolved cellulose comprising recovering an aqueous sodium hydroxide cellulose solvent from the spent coagulation bath liquid
CN115124103A (en) * 2022-05-07 2022-09-30 北京中矿博能节能科技有限公司 Crystal separation elution system and use method thereof
CN117258342A (en) * 2023-11-21 2023-12-22 湖南汇虹试剂有限公司 Rectifying column temperature regulation and control device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847201B2 (en) * 1980-03-29 1983-10-21 農林水産省食品総合研究所長 Method and device for separating solutes in ice crystals

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121626A (en) * 1955-10-18 1964-02-18 Zarchin Alexander Apparatus for sweetening water
EP1094047A1 (en) * 1999-10-22 2001-04-25 Technische Universiteit Delft Crystallisation of materials from aqueous solutions
WO2001028958A1 (en) * 1999-10-22 2001-04-26 Technische Universiteit Delft Crystallisation of materials from aqueous solutions
US7127913B2 (en) * 1999-10-22 2006-10-31 Technische Universiteit Delft Crystallisation of materials from aqueous solutions
EP3231901A1 (en) * 2016-04-14 2017-10-18 TreeToTextile AB Process for spinning dissolved cellulose comprising recovering an aqueous sodium hydroxide cellulose solvent from the spent coagulation bath liquid
WO2017178532A1 (en) * 2016-04-14 2017-10-19 Treetotextile Ab Process for spinning dissolved cellulose
US11208739B2 (en) 2016-04-14 2021-12-28 Treetotextile Ab Process for spinning dissolved cellulose
CN115124103A (en) * 2022-05-07 2022-09-30 北京中矿博能节能科技有限公司 Crystal separation elution system and use method thereof
CN117258342A (en) * 2023-11-21 2023-12-22 湖南汇虹试剂有限公司 Rectifying column temperature regulation and control device
CN117258342B (en) * 2023-11-21 2024-02-06 湖南汇虹试剂有限公司 Rectifying column temperature regulation and control device

Also Published As

Publication number Publication date
DE1039489B (en) 1958-09-25
NL181961B (en)
NL90867C (en) 1900-01-01

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