GB450987A - Process for the production of solid magnesium sulphate monohydrate - Google Patents

Process for the production of solid magnesium sulphate monohydrate

Info

Publication number
GB450987A
GB450987A GB8409/35A GB840935A GB450987A GB 450987 A GB450987 A GB 450987A GB 8409/35 A GB8409/35 A GB 8409/35A GB 840935 A GB840935 A GB 840935A GB 450987 A GB450987 A GB 450987A
Authority
GB
United Kingdom
Prior art keywords
evaporators
solution
stages
magnesium sulphate
heaters
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
GB8409/35A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB450987A publication Critical patent/GB450987A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/40—Magnesium sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

<PICT:0450987/III/1> Magnesium sulphate monohydrate is obtained by heating a concentrated magnesium sulphate solution, preferably by stages, to a temperature situated on the descending branch of the solubility curve, but at which the separation of solid salts does not take place, and then cooling the solution, preferably by stages, by spontaneous evaporation, to temperatures situated on the ascending branch of the solubility curve and which still lie within the range of formation of the monohydrate. As shown in the Figure, a saturated solution of magnesium sulphate at 75 DEG C. is forced by a pump 2 through the heaters 3, 4 and 5 in succession in which it is heated by stages, to 90 DEG , 105 DEG and 125 DEG C. respectively. The solution then flows in succession through the evaporators 6, 7 and 8 in which it is cooled by stages to 110 DEG , 95 DEG and 75 DEG C. respectively. The evaporators 6 and 7 may be injection evaporators and the evaporator 8 be provided with stirring mechanism. From vessel 8 the solution passes to a separator 9 for removal of deposited salt and the mother liquor is then recirculated through the heaters, evaporators, and separator together with fresh solution from tank 1. The hot vapours from evaporators 7 and 6 are used respectively for heating the heaters 3 and 4, the heater 5 being heated by live steam. The Specification as open to inspection under Sect. 91, comprises also the following subject-matter: the application of the process to the recovery of ferrous sulphate, manganese sulphate, sodium carbonate, or ferric chloride in the form of salts having a low content of water of crystallization. This subject-matter does not appear in the Specification as accepted.
GB8409/35A 1934-03-27 1935-03-18 Process for the production of solid magnesium sulphate monohydrate Expired GB450987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE450987X 1934-03-27

Publications (1)

Publication Number Publication Date
GB450987A true GB450987A (en) 1936-07-28

Family

ID=6538462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8409/35A Expired GB450987A (en) 1934-03-27 1935-03-18 Process for the production of solid magnesium sulphate monohydrate

Country Status (2)

Country Link
FR (1) FR787558A (en)
GB (1) GB450987A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297413A (en) * 1964-03-20 1967-01-10 Dow Chemical Co Method of preparing mgso4 3h2o crystals
CN110776032A (en) * 2019-12-09 2020-02-11 天津科技大学 Recovery treatment method of calcium-containing magnesium sulfate wastewater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297413A (en) * 1964-03-20 1967-01-10 Dow Chemical Co Method of preparing mgso4 3h2o crystals
CN110776032A (en) * 2019-12-09 2020-02-11 天津科技大学 Recovery treatment method of calcium-containing magnesium sulfate wastewater

Also Published As

Publication number Publication date
FR787558A (en) 1935-09-25

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