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WO2001067893A1 - Procede de fabrication de sel pur - Google Patents

Procede de fabrication de sel pur Download PDF

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Publication number
WO2001067893A1
WO2001067893A1 PCT/KR2001/000047 KR0100047W WO0167893A1 WO 2001067893 A1 WO2001067893 A1 WO 2001067893A1 KR 0100047 W KR0100047 W KR 0100047W WO 0167893 A1 WO0167893 A1 WO 0167893A1
Authority
WO
WIPO (PCT)
Prior art keywords
salt
heating
same
placing
crystallized
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.)
Ceased
Application number
PCT/KR2001/000047
Other languages
English (en)
Inventor
Sung Eun Oh
Hong Kim
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.)
Hoseo University
Original Assignee
Hoseo University
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 Hoseo University filed Critical Hoseo University
Publication of WO2001067893A1 publication Critical patent/WO2001067893A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C01D3/20—Purification by melting
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
    • A23L27/40—Table salts; Dietetic salt substitutes
    • 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

Definitions

  • the present invention relates to a salt preparation method, and more particularly, to a method for preparing nontoxic pure salt by removing from solar salt various impurities such as heavy metals contained in the solar salt.
  • Solar salt is made by evaporating water from sea water. Recently, according to sea pollution, the solar salt made from polluted sea water contains various heavy metal components or impurities.
  • various processed salts which are prepared by removing impurities contained in the solar salt, and processing methods thereof.
  • Known processed salts include remanufactured salt, baked salt, washed salt, bamboo salt, refined salt and so on.
  • the remanufactured salt is prepared by dissolving solar salt in water, boiling the dissolved solar salt in a pot at 100 to 200 ° C and recrystallizing.
  • the remanufactured salt has a disadvantage that heavy metals or impurities can not be sufficiently removed.
  • the baked salt is prepared by primarily baking solar salt in reaction kiln at 400 to 450 ° C for 1 to 4 hours, secondarily baking at 550 to 600 ° C for 30 minutes to 4 hours, and thirdly baking at 700 to 800 ° C for 30 minutes to 4 hours.
  • Organic matter and arsenic (As) are substantially removed in the primarily baking step, As, oxide and cadmium (Cd) are removed in the secondary baking step, and lead (Pd), refractory organic matter or calcium (Ca), or magnesium (Mg) containing oxide are removed in the third baking step.
  • this process involves complexity in adjusting the temperature by step. More disadvantageously, if the temperature is not accurately adjusted by step, harmful materials are not removed but minerals only are removed.
  • the washed salt is prepared by pulverization, washing, dehydration and drying, so that the content of insoluble matter is reduced to 0.02% or less, and magnesium chloride and sodium sulfate are reduced to 0.05% or less.
  • the washed salt has larger crystals and is hard. Thus, while the washed salt per se can be used as food grade salt, it became inadequate as food grade salt when it is used together with additives added for preventing coagulation of salt in the course of pulverization.
  • the bamboo salt is prepared by placing solar salt placed in a bamboo tube, sealing the entrance of the bamboo tube with clay, repeatedly baking the sealed bamboo tube in a pot at 1000 to 1300 ° C 8 times, and then spraying rosin powder over a wood fire to raise the baking temperature to bake at 1300 to 1700 ° C .
  • the nuclear As contained in the solar salt is combined with sulfur, rosin or iron in the bamboo to be turned into an alkali material, which is useful to human body.
  • the heavy metals or impurities contained in the solar salt can not completely be removed by heating the solar salt at higher temperature.
  • the refined salt is prepared by passing sea water through an ion exchange membrane and extracting only NaCl, and is of high purity. Also, since the refined salt has fewer impurities, that is, highly hygienic, and has particles of constant size, it is widely used as home, food or industrial grade salt. However, the refined salt production is an unfavorably energy-consuming process.
  • a method for manufacturing pure salt including the steps of placing solar salt in a heating kiln and heating the same at a predetermined temperature to dry moisture contained in the solar salt, placing the dried salt in a heating kiln and heating the same at a high temperature to be liquefied for primary melting, diluting the molten salt with clean water to sediment heavy metals or impurities contained in the salt, separating only brine from the resulting material and heating the same to evaporate moisture contained in the brine, heating moisture-evaporated salt to produce crystallized salt, placing the crystallized salt in the heating kiln and heating the same at a higher temperature than that of the first melting for secondary melting, diluting the secondarily molten salt with clean water to secondarily sediment
  • FIG. 1 is a diagram showing the processing sequence of a method for manufacturing pure salt according to the present invention.
  • Solar salt is placed in a heating kiln and heated at a temperature of approximately 200 ° C for about 1 hour to dry moisture contained in the solar salt.
  • the dried salt is again placed in the heating kiln and heated at 1300°C to be liquefied for primary melting.
  • the molten salt is diluted with clean water to sediment heavy metals or impurities contained in the salt. Only brine is separated from the resulting material and heated to evaporate moisture, thereby producing crystallized salt.
  • the crystallized salt is placed in the heating kiln and heated at 1500 ° C for secondary melting.
  • the secondarily molten salt is diluted with clean water to secondarily sediment heavy metals or impurities contained in the salt, and only brine is separated therefrom to produce crystallized salt.
  • the crystallized salt is placed in the heating kiln and heated at 1800 ° C for third melting.
  • the thirdly molten salt is diluted with clean water to sediment impurities, and only brine is separated therefrom to produce crystallized salt.
  • the crystallized salt is placed in the heating kiln and heated at 2000 ° C for fourth melting, and then an upper layered portion of the molten salt is separated from a lower layered portion to coagulate the separated molten salt.
  • the coagulated salt is pulverized to produce powdered salt.
  • Solar salt is placed in a heating kiln, heated at 1200 ° C, melted and then sterilized.
  • the molten salt is heated at 1500 ° C to burn impurities floating in the upper layered portion of the molten solution to be removed. Only one third the remaining molten salt is separated. The procedure is repeated three times to extract pure salt.
  • the extracted salt is coagulated and then pulverized to produce powdered salt.
  • pure salt can be produced by processing solar salt to effectively remove heavy metals or other impurities contained in the solar salt.
  • the thus-produced salt can be used as not only food grade salt but also as additives for medical or pharmaceutical products for rinsing eyes and treating or preventing oral diseases.
  • the salt per se can be used for removing visceral waste matter or massaging skin.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Seasonings (AREA)

Abstract

L'invention concerne un procédé de fabrication de sel pur, qui consiste à chauffer le sel marin à 200 °C pour le débarrasser de son humidité. On place alors le sel séché dans un four et on le chauffe à 1300 °C pour le liquéfier pour une première fusion. On dilue le sel fondu dans de l'eau propre afin d'en évacuer par dépôt les métaux lourds ou les impuretés et on ne sépare que la saumure du matériau résultant, que l'on chauffe pour la débarrasser de son humidité par évaporation. On chauffe le sel ainsi obtenu afin de produire du sel cristallisé, lequel est placé dans le four puis chauffé à 1500 °C pour une deuxième fusion. On dilue le sel fondu une deuxième fois dans de l'eau propre pour en évacuer par dépôt une deuxième fois les métaux lourds ou les impuretés. On sépare alors la saumure non déposée, que l'on chauffe afin de produire du sel cristallisé. Ce dernier est placé dans le four, puis chauffé à 1800 °C pour une troisième fusion. Il est ensuite dilué dans de l'eau propre de façon à évacuer par dépôt les impuretés qu'il contient. On sépare ensuite la saumure non déposée, que l'on chauffe pour produire du sel cristallisé. Ce dernier est placé dans le four, puis chauffé à 2000 °C pour une quatrième fusion. On sépare une partie stratifiée supérieure du sel fondu d'une partie stratifiée inférieure. On fait coaguler le sel fondu séparé que l'on pulvérise pour produire du sel en poudre. Ainsi, les différents métaux lourds contenus dans le sel marin sont éliminés de manière efficace et le sel obtenu est sans danger.
PCT/KR2001/000047 2000-01-12 2001-01-12 Procede de fabrication de sel pur Ceased WO2001067893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2000-0001913A KR100427012B1 (ko) 2000-01-12 2000-01-12 순수소금의 제조방법
KR2000-1913 2000-01-12

Publications (1)

Publication Number Publication Date
WO2001067893A1 true WO2001067893A1 (fr) 2001-09-20

Family

ID=19638896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2001/000047 Ceased WO2001067893A1 (fr) 2000-01-12 2001-01-12 Procede de fabrication de sel pur

Country Status (4)

Country Link
US (1) US20030012726A1 (fr)
KR (1) KR100427012B1 (fr)
CN (1) CN1395470A (fr)
WO (1) WO2001067893A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030053905A (ko) * 2001-12-24 2003-07-02 강문숙 가열분해를 이용한 분말소금의 제조방법
KR20030075595A (ko) * 2002-03-19 2003-09-26 김영생 무여염의 제조방법
BR0318682B1 (pt) * 2003-12-24 2013-07-16 processo para a produção de cristais de naci enriquecidos com glicina com fluxo aperfeiçoado.
EP2834193B1 (fr) * 2012-04-02 2017-08-09 Council of Scientific and Industrial Research Production de sel de grande pureté présentant des niveaux d'impuretés réduits
AT514275B1 (de) * 2013-05-07 2015-05-15 Andritz Tech & Asset Man Gmbh Verfahren zur Erzeugung von Salzen mit reduziertem Kristallwassergehalt
CN106629780B (zh) * 2017-03-17 2018-01-30 吉林光盐三百国际贸易有限公司 一种获得高纯NaCl晶粒的熔融提纯方法
CN108323745A (zh) * 2018-03-20 2018-07-27 天津长芦汉沽盐场有限责任公司 一种含晶型修复工序的精制粉碎洗涤盐生产方法
KR102292900B1 (ko) * 2019-02-13 2021-08-23 유일수 불순물이 제거된 소금의 제조방법 및 이에 의해 제조된 소금
KR102256819B1 (ko) 2019-04-01 2021-05-26 이기용 가스버너와 3중 구조의 용융챔버를 이용한 소금 용융장치 및 소금 용융방법
CN113455641B (zh) * 2021-07-26 2023-06-09 昆明理工大学 一种喜马拉雅玫瑰盐提纯的方法
KR102825233B1 (ko) * 2022-10-18 2025-06-24 박현균 쓴 맛이 저감된 고품질 소금 제조 방법 및 그 제조 설비
KR102825234B1 (ko) * 2022-10-24 2025-06-24 박현균 함초 소금의 제조 방법
CN117069128B (zh) * 2023-09-11 2025-09-02 昆明理工大学 多组分废盐熔融多场调控相变分级分离纯化装置及使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934868A (ja) * 1982-08-20 1984-02-25 Nara Kikai Seisakusho:Kk 調味塩の製造方法
KR910017963A (ko) * 1990-04-06 1991-11-30 최한규 식용염 제조 방법 및 장치
JPH07142A (ja) * 1993-02-25 1995-01-06 Akou Kaisui Kk 加工食塩
JPH08242811A (ja) * 1995-03-09 1996-09-24 Nippon Flour Mills Co Ltd 食塩水製造方法及び装置
US6048569A (en) * 1996-06-21 2000-04-11 Garcia; Fernando Horacio Comestible liquid sea salt having a low sodium content and method for producing the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655333A (en) * 1970-05-04 1972-04-11 Dow Chemical Co Process for producing anhydrous sodium chloride and purified saturated brine
US3760941A (en) * 1971-05-04 1973-09-25 Kali & Salz Ag Process for preparing highly free flowing rock or table salt
DE19637576A1 (de) * 1996-09-14 1998-03-19 Huels Chemische Werke Ag Verfahren zur Entfernung von Schwermetallspuren aus konzentrierter Alkalichloridlösung bis in den Bereich von 0,01 ppm
KR100300556B1 (ko) * 1998-03-13 2001-11-22 오광륜 무독성소금의제조방법
BE1013016A3 (fr) * 1998-10-30 2001-07-03 Solvay Procede de fabrication d'une solution aqueuse de chlorure de sodium.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934868A (ja) * 1982-08-20 1984-02-25 Nara Kikai Seisakusho:Kk 調味塩の製造方法
KR910017963A (ko) * 1990-04-06 1991-11-30 최한규 식용염 제조 방법 및 장치
JPH07142A (ja) * 1993-02-25 1995-01-06 Akou Kaisui Kk 加工食塩
JPH08242811A (ja) * 1995-03-09 1996-09-24 Nippon Flour Mills Co Ltd 食塩水製造方法及び装置
US6048569A (en) * 1996-06-21 2000-04-11 Garcia; Fernando Horacio Comestible liquid sea salt having a low sodium content and method for producing the same

Also Published As

Publication number Publication date
KR100427012B1 (ko) 2004-04-30
KR20010069159A (ko) 2001-07-23
US20030012726A1 (en) 2003-01-16
CN1395470A (zh) 2003-02-05

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