JP4063932B2 - Method for producing natural salt - Google Patents
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- JP4063932B2 JP4063932B2 JP32250997A JP32250997A JP4063932B2 JP 4063932 B2 JP4063932 B2 JP 4063932B2 JP 32250997 A JP32250997 A JP 32250997A JP 32250997 A JP32250997 A JP 32250997A JP 4063932 B2 JP4063932 B2 JP 4063932B2
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Description
【０００１】
【発明の属する技術分野】
本発明は天然塩の製造方法に関する。天日塩や岩塩等の原料塩からこれに含まれる塵埃等の異物を除去して天然塩を製造することが行なわれている。本発明はかかる天然塩の製造方法の改良に関する。
【０００２】
【従来の技術】
従来、天然塩の製造方法として、原料塩を水溶液とし、この水溶液に送気して、送気により塵埃等の異物を液面に浮上させる一方で、送気により水分を徐々に蒸発して塩分を析出させるという方法が提案されている（国際公開番号ＷＯ９６／２６８９９）。ところが、この従来法には、原料塩を一旦水溶液とするため、また送気により水分を徐々に蒸発して塩分を析出させるため、全体として作業が面倒であり、時間もかかるという問題がある。
【０００３】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、従来法では、作業が面倒であり、時間もかかるという点である。
【０００４】
【課題を解決するための手段】
上記の課題を解決する本発明は、天日塩からこれに含まれる異物を除去して天然塩を製造する方法において、天日塩を、その結晶表面に下記の苦汁飽和液又は海水飽和液を散布通液して、洗浄することを特徴とする天然塩の製造方法に係る。
また本発明は、天日塩からこれに含まれる異物を除去して天然塩を製造する方法において、天日塩を、その結晶と下記の苦汁飽和液又は海水飽和液とを混合し、その混合物を濾過して、洗浄することを特徴とする天然塩の製造方法に係る。
苦汁飽和液：製塩の際に副生する苦汁をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液
海水飽和液：海水をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は海水をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液
【０００５】
本発明では、天日塩からこれに含まれる塵埃等の異物を除去する洗浄方法として、天日塩の結晶表面に苦汁飽和液又は海水飽和液を散布通液する。天日塩に含まれる異物は、天日塩の結晶成長過程で順次押し上げられ、その殆どが天日塩の結晶表面に付着したような状態で存在している。したがってこれらの異物は、天日塩の結晶表面に苦汁飽和液又は海水飽和液を散布通液することで除去できる。例えば、網上に天日塩の結晶を載せ、その上部から苦汁飽和液又は海水飽和液を散布すると、散布液が結晶表面を伝わって流下する際に、結晶表面に付着している不純物を洗い出す。洗い出した不純物は洗浄液と共に網の下部へ排出する。網上に残った結晶は通常、遠心分離で脱液し、その前又は後で必要に応じ粉砕して、乾燥する。かくして不純物の少ない天然塩を得る。
【０００６】
天日塩の結晶を洗浄するために用いる媒体は苦汁飽和液又は海水飽和液である。本発明において、苦汁飽和液は製塩の際に副生する苦汁をこれに含まれる塩類が飽和状態になるまで濃縮したものであり、また海水飽和液は海水をこれに含まれる塩類が飽和状態になるまで濃縮したものである。通常、苦汁飽和液としては苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液を用い、また海水飽和液としては海水をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液を用いる。これらには、マグネシウムやカルシウム等のミネラル成分が豊富に含まれている。天日塩の結晶をかかる苦汁飽和液又は海水飽和液で前述したように洗浄すると、結晶表面に付着している異物を除去する一方で、苦汁飽和液又は海水飽和液の一部が結晶に付着し、これらに含まれるミネラル成分が結果として結晶に取り込まれる。したがって洗浄後の結晶を最終的には乾燥すると、原料である天日塩に比べ、ミネラル成分に富む天然塩を得ることができる。
【０００７】
天日塩からこれに含まれる塵埃等の異物を除去する洗浄方法としては、天日塩の結晶と苦汁飽和液又は海水飽和液とを混合し、その混合物を濾過するのも有効である。混合により結晶表面に付着している異物を洗い出し、洗い出した異物を濾過により洗浄液と共に排出する。この場合も、前述したことと同様、ミネラル成分に富む天然塩を得ることができる。天日塩の結晶と苦汁飽和液又は海水飽和液との混合物は湿式粉砕した後に濾過するのが好ましい。洗浄効果を上げ、同時によりミネラル成分に富む天然塩を得ることができるからである。
【０００８】
天日塩の結晶表面に苦汁飽和液又は海水飽和液を散布通液した後の洗浄液、或は天日塩の結晶と苦汁飽和液又は海水飽和液とを混合し、その混合物を濾過した後の洗浄液は、これらを限外濾過し、その濾液を苦汁飽和液又は海水飽和液として再使用することもできる。この場合、必要に応じ、濾液を再濃縮したり、或はまた苦汁飽和液又は海水飽和液を追加する。いずれの場合も、天日塩を洗浄するために散布通液し或は混合する苦汁飽和液又は海水飽和液の量は、天日塩１００重量部あたり、通常３００〜２０００重量部の割合となるようにする。
【０００９】
本発明によると、天日塩を一旦水溶液とし、この水溶液から塩分を析出させるのではなく、天日塩のままですなわちその結晶を洗浄するので、作業が簡便であり、時間もかからない。また天日塩の結晶を苦汁飽和液又は海水飽和液で洗浄するので、結果として、ミネラル成分に富む天然塩を得ることができる。天日塩を一旦水溶液とし、この水溶液から塩分を析出させると、ミネラル成分の含有量が低いものしか得られない。天日塩の結晶を天日塩の飽和塩水で洗浄すると、この場合も同様に、ミネラル成分の含有量が低いものしか得られない。かかるミネラル成分の含有量が低いものに、ミネラル成分を富化するため、苦汁を後添加すると、茶色に着色したものになってしまう。
【００１０】
【発明の実施の形態】
本発明に係る天然塩の製造方法の実施形態としては、下記の１）〜４）が挙げられる。
１）市販の苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を苦汁飽和液として用いる。金網上に天日塩を厚さ２０cm程度に載せ、その上部から苦汁飽和液を均一散布し、天日塩の結晶表面を伝わって流下させ、金網の下部へ排出する。排出した洗浄液を限外濾過し、その濾液を循環して、苦汁飽和液として再使用する。かかる天日塩の洗浄は、最終的に、天日塩１００重量部当たり、苦汁飽和液を約５００重量部の割合となるように散布通液する。かくして天日塩を洗浄した後、金網上に残った結晶を乾燥して、天然塩を得る。
【００１１】
２）市販の苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を苦汁飽和液として用いる。天日塩１００重量部当たり苦汁飽和液５００重量部の割合で双方を混合し、その混合物を湿式粉砕した後、金網で濾過し、濾液（洗浄液）を排出する。金網上に残った粉砕物を遠心分離で脱液した後、乾燥して、天然塩を得る。
【００１２】
３）海水をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を海水飽和液として用いる。金網上に天日塩を厚さ２０cm程度に載せ、その上部から海水飽和液を均一散布し、天日塩の結晶表面を伝わって流下させ、金網の下部へ排出する。排出した洗浄液を限外濾過し、その濾液を循環して、海水飽和液として再使用する。かかる天日塩の洗浄は、最終的に、天日塩１００重量部当たり、海水飽和液を約５００重量部の割合となるように散布通液する。かくして天日塩を洗浄した後、金網上に残った結晶を乾燥して、天然塩を得る。
【００１３】
４）海水をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を海水飽和液として用いる。天日塩１００重量部当たり海水飽和液５００重量部の割合で双方を混合し、その混合物を湿式粉砕した後、金網で濾過し、濾液（洗浄液）を排出する。金網上に残った粉砕物を遠心分離で脱液した後、乾燥して、天然塩を得る。
【００１４】
【実施例】
実施例１
市販の苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を苦汁飽和液として用いた。金網上にメキシコ産天日塩を厚さ２０cm程度に載せ、その上部から苦汁飽和液を均一散布し、天日塩の結晶表面を伝わって流下させ、金網の下部へ排出した。排出した洗浄液を限外濾過し、その濾液を循環して、苦汁飽和液として再使用した。かかる天日塩の洗浄は、最終的に、天日塩１００重量部当たり、苦汁飽和液を約５００重量部の割合となるように散布通液した。かくして天日塩を洗浄した後、金網上に残った結晶を乾燥して、天然塩を得た。ここで得た天然塩は、目視観察で異物を有さず、マグネシウム３５０mg％、カルシウム２６mg％、カリウム２６mg％を含んでおり、水不溶性成分を含んでいなかった。
【００１５】
実施例２
市販の苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を苦汁飽和液として用いた。メキシコ産天日塩１００重量部当たり苦汁飽和液５００重量部の割合で双方を混合し、その混合物を湿式粉砕した後、金網で濾過し、濾液（洗浄液）を排出した。金網上に残った粉砕物を遠心分離で脱液した後、乾燥して、天然塩を得た。ここで得た天然塩は、目視観察で異物を有さず、マグネシウム３６２mg％、カルシウム２８mg％、カリウム３０mg％を含んでおり、水不溶性成分を含んでいなかった。
【００１６】
実施例３
海水をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を海水飽和液として用いた。金網上にメキシコ産天日塩を厚さ２０cm程度に載せ、その上部から海水飽和液を均一散布し、天日塩の結晶表面を伝わって流下させ、金網の下部へ排出した。排出した洗浄液を限外濾過し、その濾液を循環して、海水飽和液として再使用した。かかる天日塩の洗浄は、最終的に、天日塩１００重量部当たり、海水飽和液を約５００重量部の割合となるように散布通液した。かくして天日塩を洗浄した後、金網上に残った結晶を乾燥して、天然塩を得た。ここで得た天然塩は、目視観察で異物を有さず、マグネシウム３１０mg％、カルシウム１８０mg％、カリウム１１５mg％を含んでおり、水不溶性成分を含んでいなかった。
【００１７】
実施例４
海水をこれに含まれる塩類が析出し始めるまで加熱濃縮し、冷却した後、その上澄液を海水飽和液として用いた。メキシコ産天日塩１００重量部当たり海水飽和液５００重量部の割合で双方を混合し、その混合物を湿式粉砕した後、金網で濾過し、濾液（洗浄液）を排出した。金網上に残った粉砕物を遠心分離で脱液した後、乾燥して、天然塩を得た。ここで得た天然塩は、目視観察で異物を有さず、マグネシウム３２５mg％、カルシウム１９１mg％、カリウム１２３mg％を含んでおり、水不溶性成分を含んでいなかった。
【００１８】
比較例１
メキシコ産天日塩１００重量部当たり水５００重量部の割合で双方を撹拌し、天日塩を水に溶解した。この塩水に空気を送気し、液面に浮上した異物を除去した。更に空気を送気し続け、水分を徐々に蒸発して、塩分を析出させた。析出させた塩分を乾燥して、天然塩を得た。ここで得た天然塩は、目視観察で異物を有さず、また水不溶性成分を含んでいなかったが、マグネシウム８mg％、カルシウム２６mg％、カリウム１２mg％であった。
【００１９】
比較例２
苦汁飽和液の代わりにメキシコ産天日塩の飽和塩水をそのまま用いたこと以外は実施例１と同様にして天然塩を得た。ここで得た天然塩は、目視観察で異物を有しており、また水不溶性成分を２０mg％含んでいて、マグネシウム２０mg％、カルシウム５０mg％、カリウム２０mg％であった。
【００２０】
比較例３
苦汁飽和液の代わりにメキシコ産天日塩の飽和塩水をそのまま用いたこと以外は実施例２と同様にして天然塩を得た。ここで得た天然塩は、目視観察で異物を有しており、また水不溶性成分を２０mg％含んでいて、マグネシウム２３mg％、カルシウム４６mg％、カリウム２１mg％であった。
【００２１】
【発明の効果】
既に明らかなように、以上説明した本発明には、簡便な作業で、短時間に、異物を含まない、ミネラル成分に富む天然塩を得ることができるという効果がある。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a natural salt. A natural salt is produced by removing foreign matters such as dust contained in a raw material salt such as solar salt and rock salt. The present invention relates to an improvement in the process for producing such natural salts.
[0002]
[Prior art]
Conventionally, as a method for producing a natural salt, a raw material salt is used as an aqueous solution, and air is supplied to the aqueous solution. Has been proposed (International Publication No. WO96 / 26899). However, this conventional method has a problem that since the raw material salt is once converted into an aqueous solution and the water is gradually evaporated by air supply to precipitate the salt, the work is troublesome and takes time as a whole.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that the conventional method is troublesome and time consuming.
[0004]
[Means for Solving the Problems]
The present invention for solving the above-mentioned problems is a method for producing natural salt by removing foreign substances contained in solar salt, and spraying and passing solar salt on the crystal surface with the following bitter saturated solution or seawater saturated solution. And a method for producing a natural salt, characterized by comprising washing.
Further, the present invention provides a method for producing natural salt by removing foreign substances contained therein from sun salt, the sun salt is mixed with crystals and the following bitter juice saturated solution or seawater saturated solution, and the mixture is filtered. And a method for producing a natural salt characterized by washing.
Bitter saturated solution: Condensed bitter juice produced during salt production until the salt contained in it is saturated, or the supernatant obtained when the bitter juice is heated and concentrated until the salt contained therein begins to precipitate. Liquid: A supernatant obtained by concentrating seawater until the salts contained therein are saturated, or by heating and concentrating seawater until the salts contained therein begin to precipitate.
In the present invention, as a cleaning method for removing foreign matters such as dust contained in solar salt, bitter saturated solution or seawater saturated solution is sprayed and passed through the crystal surface of solar salt. The foreign substances contained in the solar salt are sequentially pushed up during the crystal growth process of the solar salt, and most of them are present in a state of adhering to the crystal surface of the solar salt. Therefore, these foreign substances can be removed by spraying and passing a bitter saturated solution or a seawater saturated solution over the surface of the solar salt crystal. For example, when a salt of sun salt is placed on a net and a bitter saturated solution or a sea water saturated solution is sprayed from above, impurities adhering to the crystal surface are washed out when the spray solution flows down the crystal surface. The washed out impurities are discharged together with the cleaning liquid to the lower part of the net. Crystals remaining on the net are usually drained by centrifugation, pulverized as needed before or after, and dried. Thus, a natural salt with few impurities is obtained.
[0006]
The medium used to wash the solar salt crystals is a bitter saturate or a seawater saturate. In the present invention, the bitter juice saturated solution is obtained by concentrating the bitter juice produced as a by-product during salt production until the salts contained therein become saturated, and the seawater saturated solution is obtained by saturating the salt contained in the sea water. It is concentrated until. Usually, as the bitter saturate, use the supernatant liquid when the bitter juice is heated and concentrated until the salts contained therein start to precipitate, and as the seawater saturate, concentrate the heat until the salts contained therein start to precipitate. Use the supernatant. These are rich in mineral components such as magnesium and calcium. Washing the sun salt crystals with such a bitter saturated solution or seawater saturated solution as described above removes foreign matter adhering to the crystal surface, while part of the bitter saturated solution or seawater saturated solution adheres to the crystals, As a result, the mineral components contained therein are incorporated into the crystals. Therefore, when the washed crystals are finally dried, a natural salt rich in mineral components can be obtained as compared with the sun salt as a raw material.
[0007]
As a cleaning method for removing foreign matters such as dust contained in solar salt, it is also effective to mix solar salt crystals with bitter juice saturated solution or seawater saturated solution and filter the mixture. The foreign matter adhering to the crystal surface is washed out by mixing, and the washed-out foreign matter is discharged together with the cleaning liquid by filtration. In this case, as described above, a natural salt rich in mineral components can be obtained. It is preferable to filter the mixture of the salt of sun salt and the bitter juice saturated solution or the seawater saturated solution after wet pulverization. This is because a natural salt rich in mineral components can be obtained at the same time as increasing the cleaning effect.
[0008]
The washing liquid after spraying bitter saturated solution or sea water saturated solution on the surface of the salt of sun salt, or the washing solution after mixing the salt of sun salt with bitter saturated solution or sea water saturated solution and filtering the mixture Can be ultrafiltered, and the filtrate can be reused as a bitter saturate or a seawater saturate. In this case, if necessary, the filtrate is reconcentrated or a bitter saturate or seawater saturate is added. In any case, the amount of the bitter saturated solution or seawater saturated solution to be sprayed or mixed to wash the solar salt is usually 300 to 2000 parts by weight per 100 parts by weight of the solar salt.
[0009]
According to the present invention, solar salt is not once used as an aqueous solution, and salt is not precipitated from this aqueous solution, but the salt is washed as it is, that is, the crystals are washed. Therefore, the operation is simple and does not take time. Moreover, since the salt of solar salt is washed with a bitter juice saturated solution or a seawater saturated solution, a natural salt rich in mineral components can be obtained as a result. Once sun salt is made into an aqueous solution and salt is precipitated from this aqueous solution, only a low mineral component content can be obtained. When the sun salt crystals are washed with sun salt saturated brine, only those having a low content of mineral components can be obtained in this case as well. In order to enrich the mineral component to a low content of such mineral component, when bitter juice is added later, it becomes colored brown.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the method for producing a natural salt according to the present invention include the following 1) to 4).
1) After heating and concentrating commercially available bitter juice until the salts contained therein begin to precipitate and cooling, the supernatant is used as a bitter juice saturated solution. Put sun salt on the wire mesh to a thickness of about 20cm, spray a bitter-saturated solution uniformly from the top, let it flow down the crystal surface of the sun salt, and discharge it to the bottom of the wire mesh. The discharged washing liquid is ultrafiltered, and the filtrate is circulated and reused as a bitter saturate. In the washing of the sun salt, finally, the bitter saturated solution is sprayed and passed so as to have a ratio of about 500 parts by weight per 100 parts by weight of the sun salt. After washing the sun salt in this way, the crystals remaining on the wire mesh are dried to obtain a natural salt.
[0011]
2) After heating and concentrating commercially available bitter juice until the salt contained therein begins to precipitate, and cooling, the supernatant is used as a saturated bitter juice. Both are mixed at a ratio of 500 parts by weight of a bitter saturated solution per 100 parts by weight of solar salt, the mixture is wet pulverized, filtered through a wire mesh, and the filtrate (cleaning liquid) is discharged. The pulverized material remaining on the wire mesh is drained by centrifugation and then dried to obtain a natural salt.
[0012]
3) The seawater is heated and concentrated until the salts contained therein start to precipitate, and after cooling, the supernatant is used as a seawater saturated liquid. Place sun salt on the wire mesh to a thickness of about 20cm, spray a saturated seawater solution uniformly from the top, flow down the crystal surface of the sun salt, and discharge to the bottom of the wire mesh. The discharged washing liquid is ultrafiltered, and the filtrate is circulated and reused as seawater saturated liquid. In the cleaning of the sun salt, the sea water saturated solution is finally sprayed and supplied at a ratio of about 500 parts by weight per 100 parts by weight of the sun salt. After washing the sun salt in this way, the crystals remaining on the wire mesh are dried to obtain a natural salt.
[0013]
4) Heat and concentrate seawater until the salts contained therein begin to precipitate, cool, and use the supernatant as a seawater saturated liquid. Both are mixed at a ratio of 500 parts by weight of seawater saturated liquid per 100 parts by weight of solar salt, the mixture is wet pulverized, filtered through a wire mesh, and the filtrate (cleaning liquid) is discharged. The pulverized material remaining on the wire mesh is drained by centrifugation and then dried to obtain a natural salt.
[0014]
【Example】
Example 1
The commercially available bitter juice was concentrated by heating until the salts contained therein began to precipitate, and after cooling, the supernatant was used as a saturated bitter juice. Mexican sun salt was placed on the wire mesh to a thickness of about 20 cm, and a bitter saturated liquid was uniformly sprayed from the top of the wire mesh, and then flowed down the crystal surface of the sun salt and discharged to the bottom of the wire mesh. The discharged washing liquid was ultrafiltered, and the filtrate was circulated and reused as a bitter saturate. In the washing of the sun salt, finally, the bitter saturated solution was sprayed and passed through at a ratio of about 500 parts by weight per 100 parts by weight of the sun salt. After washing the sun salt in this way, the crystals remaining on the wire mesh were dried to obtain a natural salt. The natural salt obtained here had no foreign matter by visual observation, contained magnesium 350 mg%, calcium 26 mg% and potassium 26 mg%, and contained no water-insoluble component.
[0015]
Example 2
The commercially available bitter juice was concentrated by heating until the salts contained therein began to precipitate, and after cooling, the supernatant was used as a saturated bitter juice. Both were mixed at a ratio of 500 parts by weight of a bitter saturated solution per 100 parts by weight of Mexican sun salt, the mixture was wet pulverized, filtered through a wire mesh, and the filtrate (cleaning liquid) was discharged. The pulverized material remaining on the wire mesh was drained by centrifugation and then dried to obtain a natural salt. The natural salt obtained here had no foreign matter by visual observation, contained 362 mg% magnesium, 28 mg% calcium, 30 mg% potassium, and contained no water-insoluble components.
[0016]
Example 3
Seawater was heated and concentrated until the salts contained therein began to precipitate, cooled, and the supernatant was used as a seawater saturated solution. Mexican sun salt was placed on the wire mesh to a thickness of about 20 cm, and the seawater saturated solution was uniformly sprayed from the top of the wire net, and then flowed down the crystal surface of the sun salt and discharged to the bottom of the wire mesh. The discharged washing liquid was ultrafiltered, and the filtrate was circulated and reused as a seawater saturated liquid. In the washing of the sun salt, the sea water saturated solution was finally sprayed and passed through the water so that the ratio was about 500 parts by weight per 100 parts by weight of the sun salt. After washing the sun salt in this way, the crystals remaining on the wire mesh were dried to obtain a natural salt. The natural salt obtained here had no foreign matter by visual observation, contained 310 mg% magnesium, 180 mg% calcium, and 115 mg% potassium, and contained no water-insoluble component.
[0017]
Example 4
The seawater was heated and concentrated until the salts contained therein began to precipitate, and after cooling, the supernatant was used as a seawater saturated liquid. Both were mixed at a ratio of 500 parts by weight of a saturated seawater solution per 100 parts by weight of Mexican sun salt, the mixture was wet pulverized, filtered through a wire mesh, and the filtrate (cleaning liquid) was discharged. The pulverized material remaining on the wire mesh was drained by centrifugation and then dried to obtain a natural salt. The natural salt obtained here had no foreign matter by visual observation, contained 325 mg% magnesium, 191 mg% calcium, 123 mg% potassium, and contained no water-insoluble components.
[0018]
Comparative Example 1
Both were stirred at a ratio of 500 parts by weight of water per 100 parts by weight of Mexican solar salt to dissolve the solar salt in water. Air was sent to the salt water to remove foreign substances that floated on the liquid surface. Further, air was continued to be supplied, and the water was gradually evaporated to precipitate salt. The precipitated salt was dried to obtain a natural salt. The natural salt obtained here had no foreign matter by visual observation, and contained no water-insoluble component, but was 8 mg% magnesium, 26 mg% calcium, and 12 mg% potassium.
[0019]
Comparative Example 2
Natural salt was obtained in the same manner as in Example 1 except that the saturated salt water of Mexican sun salt was used as it was instead of the bitter juice saturated solution. The natural salt obtained here had foreign matters by visual observation, and contained 20 mg% of a water-insoluble component, and was 20 mg% magnesium, 50 mg% calcium, and 20 mg% potassium.
[0020]
Comparative Example 3
Natural salt was obtained in the same manner as in Example 2 except that the saturated salt water of Mexican sun salt was used as it was instead of the saturated bitter juice. The natural salt obtained here had foreign matters by visual observation and contained 20 mg% of a water-insoluble component, and was magnesium 23 mg%, calcium 46 mg%, and potassium 21 mg%.
[0021]
【The invention's effect】
As apparent from the above, the present invention described above has an effect that a natural salt rich in mineral components that does not contain foreign substances can be obtained in a short time by a simple operation.
Claims (4)
苦汁飽和液：製塩の際に副生する苦汁をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液
海水飽和液：海水をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は海水をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液 In a method for producing natural salt by removing foreign substances contained in solar salt, natural salt is characterized in that the salt is washed by spraying the following bitter saturated solution or seawater saturated solution onto the crystal surface. Method for producing salt.
Bitter juice: Condensed bitter juice produced during salt production until the salt contained therein is saturated, or the supernatant obtained when the bitter juice is heated and concentrated until the salt contained therein begins to precipitate.
Seawater saturated liquid: A supernatant obtained by concentrating seawater until the salts contained therein are saturated or when heating and concentrating seawater until the salts contained therein begin to precipitate.
苦汁飽和液：製塩の際に副生する苦汁をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は苦汁をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液
海水飽和液：海水をこれに含まれる塩類が飽和状態になるまで濃縮したもの又は海水をこれに含まれる塩類が析出し始めるまで加熱濃縮したときの上澄液 In the method for producing natural salt by removing foreign substances contained in solar salt, the salt is mixed with the crystal and the following bitter juice saturated solution or seawater saturated solution, and the mixture is filtered and washed. A method for producing a natural salt.
Bitter juice: Condensed bitter juice produced during salt production until the salt contained therein is saturated, or the supernatant obtained when the bitter juice is heated and concentrated until the salt contained therein begins to precipitate.
Seawater saturated liquid: A supernatant obtained by concentrating seawater until the salts contained therein are saturated or when heating and concentrating seawater until the salts contained therein begin to precipitate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32250997A JP4063932B2 (en) | 1997-11-07 | 1997-11-07 | Method for producing natural salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32250997A JP4063932B2 (en) | 1997-11-07 | 1997-11-07 | Method for producing natural salt |
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| Publication Number | Publication Date |
|---|---|
| JPH11139823A JPH11139823A (en) | 1999-05-25 |
| JP4063932B2 true JP4063932B2 (en) | 2008-03-19 |
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| JP32250997A Expired - Fee Related JP4063932B2 (en) | 1997-11-07 | 1997-11-07 | Method for producing natural salt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025650B1 (en) * | 2017-10-19 | 2019-05-27 | Zoutman Nv | METHOD AND SYSTEM FOR PROCESSING RAW (SEA) SALT |
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| JP5062728B2 (en) * | 2006-12-25 | 2012-10-31 | 室戸海洋深層水株式会社 | Seawater treatment method and mineral water obtained by the seawater treatment method |
| KR101147914B1 (en) * | 2009-10-09 | 2012-05-24 | 씨제이제일제당 (주) | A process for preparing solar salt |
| KR101366351B1 (en) * | 2012-04-09 | 2014-02-21 | 주식회사 도미니언코리아 | Method for maunfacturing of flake type salt using sun-dried salt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025650B1 (en) * | 2017-10-19 | 2019-05-27 | Zoutman Nv | METHOD AND SYSTEM FOR PROCESSING RAW (SEA) SALT |
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| JPH11139823A (en) | 1999-05-25 |
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