KR960013993A - Manufacturing method of dihydrate gypsum - Google Patents

Manufacturing method of dihydrate gypsum Download PDF

Info

Publication number
KR960013993A
KR960013993A KR1019950013372A KR19950013372A KR960013993A KR 960013993 A KR960013993 A KR 960013993A KR 1019950013372 A KR1019950013372 A KR 1019950013372A KR 19950013372 A KR19950013372 A KR 19950013372A KR 960013993 A KR960013993 A KR 960013993A
Authority
KR
South Korea
Prior art keywords
gypsum
producing
present
aqueous solution
acid
Prior art date
Application number
KR1019950013372A
Other languages
Korean (ko)
Other versions
KR0147927B1 (en
Inventor
욘히꼬 쿠도우
고우쥬 스또우
Original Assignee
고다마 슌이찌로우
쿠레하 카가쿠 고우교우 가부시끼가이샤
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 고다마 슌이찌로우, 쿠레하 카가쿠 고우교우 가부시끼가이샤 filed Critical 고다마 슌이찌로우
Publication of KR960013993A publication Critical patent/KR960013993A/en
Application granted granted Critical
Publication of KR0147927B1 publication Critical patent/KR0147927B1/en

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
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

본 발명은 황산과 석회석보다 부피밀도(Bulk Density)가 큰 이수석고를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing dihydrate gypsum having a bulk density greater than that of sulfuric acid and limestone.

본 발명은 부피밀도가 큰 석고를 제조함과 함께 폐수처리의 부담이 경감된 석고의 제조방법을 제공할 목적으로, 수용액중에서 황산과 석회석을 반응시켜 석고슬러리로 하고, 다음으로 당해 슬러리로부터 석고를 고체ㆍ액체 분리하여 석고를 얻는 방법에 있어서, 수용액성분으로서 술포호박산을 존재시키고, 또한 반응액의 pH를 4.0~6.0의 범위의 특정값으로 계속 제어하여 반응시키는 구성을 가진다.The present invention provides a gypsum slurry by reacting sulfuric acid and limestone in an aqueous solution in order to provide a method for producing gypsum with a bulk density and to reduce the burden of wastewater treatment. In the method of solid-liquid separation and obtaining gypsum, sulfobacic acid is present as an aqueous solution component, and the pH of the reaction solution is continuously controlled to a specific value in the range of 4.0 to 6.0 to react.

Description

이수(二水)석고의 제조방법Manufacturing method of dihydrate gypsum

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

도면은 본 발명의 실시상태를 도시한 공정도이다.The figure is a process chart showing an embodiment of the present invention.

Claims (2)

수용액중에서 황산과 석회석을 반응시켜 석고슬러리로 하고, 다음으로 당해 슬러리로부터 석고를 고체ㆍ액체 분리하여 석고케익을 얻는 석고의 제조방법에 있어서, 수용액성분으로서 술포호박산을 존재시키고, 또한 반응액의 pH를 4.0~6.0의 범위를 제어하면서 반응을 행하는 것을 특징으로 하는 이수석고의 제조방법.In a method for producing gypsum obtained by reacting sulfuric acid with limestone in an aqueous solution to form gypsum slurry, and then gypsum cake by solid and liquid separation of gypsum from the slurry, sulfobacic acid is present as an aqueous solution and the pH of the reaction solution A method for producing hydrated gypsum, characterized in that for carrying out the reaction while controlling the range of 4.0 to 6.0. 제1항에 있어서, 술포호박산의 농도를 10~50mmol/kg로 하는 것을 특징으로 하는 이수석고의 제조방법.The method for producing dihydrate gypsum according to claim 1, wherein the concentration of sulfobacmic acid is 10 to 50 mmol / kg. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950013372A 1994-10-05 1995-05-26 Production of gypsum dihydrate KR0147927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP94-266339 1994-10-05
JP6266339A JPH08109018A (en) 1994-10-05 1994-10-05 Production of gypsum dihydrate

Publications (2)

Publication Number Publication Date
KR960013993A true KR960013993A (en) 1996-05-22
KR0147927B1 KR0147927B1 (en) 1998-08-17

Family

ID=17429569

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950013372A KR0147927B1 (en) 1994-10-05 1995-05-26 Production of gypsum dihydrate

Country Status (3)

Country Link
JP (1) JPH08109018A (en)
KR (1) KR0147927B1 (en)
TW (1) TW293809B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100280264B1 (en) * 1996-12-20 2001-03-02 이구택 High purity gypsum manufacturing method using decarburized sludge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100863933B1 (en) * 2002-04-08 2008-10-16 주식회사 코오롱 A calcium sulfate and a process of preparing for the same
CN102180507B (en) * 2011-03-24 2013-04-17 昆明安雅达建材科技有限公司 Method for preparing high-crystallinity gypsum
CN105858705A (en) * 2016-03-30 2016-08-17 东南大学 Method for preparing dihydrate gypsum with low free water content by using waste sulfuric acid solution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100280264B1 (en) * 1996-12-20 2001-03-02 이구택 High purity gypsum manufacturing method using decarburized sludge

Also Published As

Publication number Publication date
JPH08109018A (en) 1996-04-30
TW293809B (en) 1996-12-21
KR0147927B1 (en) 1998-08-17

Similar Documents

Publication Publication Date Title
ES437314A1 (en) Manufacture of calcium sulphate alpha hemihydrate
ES506909A0 (en) PROCEDURE TO PURIFY WASTEWATER AND-OR MUD FROM WASTEWATER.
DE69620423T2 (en) METHOD FOR PRODUCING PURE CALCIUM CARBONATE
ES549121A0 (en) PROCEDURE FOR OBTAINING MAGNESIC OXIDE OF HIGH PURITY
TW353624B (en) Desulfurization process for flue gases
TW326404B (en) An exhaust desulfurization method
KR960013993A (en) Manufacturing method of dihydrate gypsum
JPS5370097A (en) Purifying method for crude sodium silicofluoride
GB1459379A (en) Process for producing a-type calcium sulphate hemihydrate
JPS6472915A (en) Production of ammonia and sulfur dioxide
GB1328357A (en) Wet process for the manufacture of phosphoric acid and caldium sulphate
EP0561264A3 (en) Improved process for the production of methylmethacrylate monomer from acetoncyanhydrin
GB1485067A (en) Effluent treatment process
GB1413521A (en) Processes for purifying gases containing hydrogen cyanide
JPS56145106A (en) Preparation of aqueous solution of calcium nitrite
GB1250191A (en)
JPS55167127A (en) Continuously converting method for anhydrous gypsum into gypsum
ES457127A1 (en) Preparation of ferric sulfate solutions
JPS5641815A (en) Purifying method for wet process phosphoric acid solution
JPS55113621A (en) Manufacture of alpha hemihydrate gypsum
KR830010001A (en) Removal of fluorine and phosphate recovery from gypsum wastewater from phosphate fertilizer production
Kudo et al. Coagulation-sedimentation method using aluminum sulfate and calcium hydroxide for removal of boric acid from wastewater-improvement of removal rate of boric acid by addition of gypsum into wastewater
GB1531459A (en) Preparation of solutions of a basic aluminium compound and their use in water treatment
SU694453A1 (en) Method of preparing aluminum sulfate solution
SU1326626A1 (en) Method of producing cobalt solution for electric extraction of cobalt

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20010510

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee