Method for preparing alkaline type magnesium iodide crystal whiskers

A magnesium iodide and whisker technology, applied in the field of inorganic material preparation, can solve the problems of resource waste, bittern utilization rate less than 20%, and affecting the ecological balance of offshore waters, etc.

Inactive Publication Date: 2017-12-08
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the various chemical elements in the by-product bittern during the salt making process are about 40 times more concentrated than seawater, it is an excellent raw material for extracting chemical elements in seawater, but limited by the technical level, the utilization rate of bittern is less than 20%. , a large amount of bittern resources are discharged into the sea or circulated in salt pans, which not only causes a waste of resources but also affects the ecological balance of offshore waters
But, so far, also do not see the report that does not prepare basic magnesium iodide whisker through impurity removal

Method used

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  • Method for preparing alkaline type magnesium iodide crystal whiskers
  • Method for preparing alkaline type magnesium iodide crystal whiskers
  • Method for preparing alkaline type magnesium iodide crystal whiskers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing basic magnesium iodide whiskers, comprising the steps of:

[0025] S1. Take 300mL of bittern (bitter is taken from Xuwen Salt Field, Guangdong), filter and discard the insoluble matter;

[0026] S2. prepare the NaOH solution of 0.8mol / L and the NaI solution of 3mol / L;

[0027] S3. Mix the NaI solution and the bittern solution in a volume ratio of 3:1 to obtain a mixed solution 1;

[0028] S4. Take 150mL of mixed solution 1, put it in a 250mL Erlenmeyer flask, place the Erlenmeyer flask in a 30°C water bath to 30°C, then slowly add 50mL of 0.8mol / L NaOH solution dropwise under stirring, to obtain Mixture 2;

[0029] S5. Put the mixed solution 2 in a water bath with a water temperature of 35°C to continue aging for 55 hours, filter and collect the precipitate, and dry it in an oven (T=80±3°C, t=24h) to obtain basic iodine Magnesium whiskers.

[0030] Measure the XRD, SEM, elemental analysis result of gained whisker, SEM test shows to be whisker ...

Embodiment 2

[0034] A method for preparing basic magnesium iodide whiskers, comprising the steps of:

[0035] S1. Take 300mL of bittern (bitter is taken from Xuwen Salt Field, Guangdong), filter and discard the insoluble matter;

[0036] S2. prepare the NaOH solution of 0.8mol / L and the NaI solution of 3mol / L;

[0037] S3. Mix the NaI solution and the bittern solution in a volume ratio of 3:1 to obtain a mixed solution 1;

[0038] S4. Take 100mL of mixed solution 1, put it in a 250mL Erlenmeyer flask, place the Erlenmeyer flask in a 30°C water bath to 30°C, and then slowly add 33mL of 0.8mol / L NaOH solution dropwise under stirring to obtain Mixture 2;

[0039] S5. Put the mixed solution 2 in a water bath with a water temperature of 35°C to continue aging for 55 hours, filter and collect the precipitate, and dry it in an oven (T=80±3°C, t=24h) to obtain basic iodine Magnesium oxide whiskers, the yield of whiskers is 91%, and the aspect ratio of whiskers is 16:1.

Embodiment 3

[0041] A method for preparing basic magnesium iodide whiskers, comprising the steps of:

[0042] S1. Take 300mL of bittern (bitter is taken from Xuwen Salt Field, Guangdong), filter and discard the insoluble matter;

[0043] S2. prepare the NaOH solution of 0.8mol / L and the NaI solution of 3mol / L;

[0044] S3. Mix the NaI solution and the bittern solution in a volume ratio of 3:1 to obtain a mixed solution 1;

[0045] S4. Take 50mL of mixed solution 1 and place it in a 250mL Erlenmeyer flask, place the Erlenmeyer flask in a 30°C water bath to 30°C, then slowly add 17mL of 0.8mol / L NaOH solution dropwise under stirring to obtain a mixture Liquid 2;

[0046] S5. Put the mixed solution 2 in a water bath with a water temperature of 35°C to continue aging for 55 hours, filter and collect the precipitate, and dry it in an oven (T=80±3°C, t=24h) to obtain basic iodine Magnesium oxide whiskers, the yield of whiskers is 90%, and the aspect ratio of whiskers is 15:1.

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Abstract

The invention discloses a method for preparing alkaline type magnesium iodide crystal whiskers. The method comprises the following steps: S1, taking bittern, filtering and discarding insoluble substances; S2, mixing a NaI solution with concentration of 3 mol/L with a bittern solution treated in step S1 in a volume ratio of 3 to 1 to obtain a mixed solution 1; S3, heating the mixed solution 1 to 30 DEG C, then dropwise adding a NaOH solution with concentration of 0.8 mol/L into the mixed solution 1 under a stirring state to obtain a mixed solution 2, wherein a volume ratio of the mixed solution 1 to the NaOH solution with concentration of 0.8 mol/L is (2.5-3.5) to 1; and S4, continuously ageing the mixed solution 2 for 55 hours at a temperature of 35 DEG C, filtering and collecting precipitates, and drying the precipitates to obtain the alkaline type magnesium iodide crystal whiskers.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a method for preparing basic magnesium iodide whiskers. Background technique [0002] my country is a big sea salt producing country, and the long coastline provides a guarantee for my country's sea salt production. my country's sea salt production ranks first in the world, with an annual output of 23 million tons of sea salt and 20 million cubic meters of bittern as a by-product 3 Among them, the resources of magnesium chloride and magnesium sulfate reached 3.792 million tons and 1.752 million tons respectively. Although the various chemical elements in the by-product bittern during the salt making process are about 40 times more concentrated than seawater, it is an excellent raw material for extracting chemical elements in seawater, but limited by the technical level, the utilization rate of bittern is less than 20%. , a large amount of bittern reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B29/62C30B7/14
CPCC30B29/12C30B7/14C30B29/62
Inventor 吴健松
Owner LINGNAN NORMAL UNIV
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