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Method of preparing basic magnesium borate crystal whiskers

A magnesium borate whisker and basic technology, which is applied in the field of preparing basic magnesium borate whiskers, can solve the problems of affecting the ecological balance of offshore sea areas, waste of resources, and the utilization rate of bittern being less than 20%.

Inactive Publication Date: 2017-10-24
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 of preparing basic magnesium borate whisker independently through impurity removal

Method used

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  • Method of preparing basic magnesium borate crystal whiskers
  • Method of preparing basic magnesium borate crystal whiskers
  • Method of preparing basic magnesium borate crystal whiskers

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing basic magnesium borate whiskers, comprising the steps of:

[0024] S1. Take 300mL of bittern (bitter is taken from Chaerhan Salt Lake in Qinghai), filter and discard the insoluble matter.

[0025] S2. Prepare 0.8mol / L NaOH solution and 1mol / L Na 2 B 4 o 7 solution, and then mix the two solutions in equal volumes (referred to as mixed lye).

[0026] S3. Take 100 mL of the bittern solution, put it in a 250 mL conical flask, and put the conical flask in a 50°C water bath to 50°C. Then, 60 mL of mixed lye was slowly added dropwise under stirring. The water bath was continued at 50 °C for 15 h.

[0027] S4. Put the reactants of S3 into a hydrothermal reaction kettle, set the hydrothermal reaction temperature to 180° C., and take out the sample after 18 hours of reaction. Dry the sample in an oven (T=80±3°C, t=24h) to obtain basic magnesium borate whiskers.

[0028] Measure the XRD, SEM, elemental analysis result of gained whisker, SEM test shows...

Embodiment 2

[0032] A method for preparing basic magnesium borate whiskers, comprising the steps of:

[0033] S1. Take 300mL of bittern (bitter is taken from Chaerhan Salt Lake in Qinghai), filter and discard the insoluble matter.

[0034] S2. Prepare 0.8mol / L NaOH solution and 1mol / L Na 2 B 4 o 7 solution, and then mix the two solutions in equal volumes (referred to as mixed lye).

[0035] S3. Take 90 mL of the bittern solution, place it in a 250 mL Erlenmeyer flask, and place the Erlenmeyer flask in a 50°C water bath to 50°C. Then, 60 mL of mixed lye was slowly added dropwise under stirring. The water bath was continued at 50 °C for 15 h.

[0036] S4. Put the reactants of S3 into a hydrothermal reaction kettle, set the hydrothermal reaction temperature to 180° C., and take out the sample after 18 hours of reaction. Dry the sample in an oven (T=80±3°C, t=24h) to obtain basic magnesium borate whiskers. Both XRD diffraction and elemental analysis prove that the chemical formula of ba...

Embodiment 3

[0038] A method for preparing basic magnesium borate whiskers, comprising the steps of:

[0039] S1. Take 300mL of bittern (bitter is taken from Chaerhan Salt Lake in Qinghai), filter and discard the insoluble matter.

[0040] S2. Prepare 0.8mol / L NaOH solution and 1mol / L Na 2 B 4 o 7 solution, and then mix the two solutions in equal volumes (referred to as mixed lye).

[0041] S3. Take 100 mL of the bittern solution, put it in a 250 mL conical flask, and put the conical flask in a 50°C water bath to 50°C. Then, 60 mL of mixed lye was slowly added dropwise under stirring. The water bath was continued at 53 °C for 15 h.

[0042] S4. Put the reactants of S3 into a hydrothermal reaction kettle, set the hydrothermal reaction temperature at 175° C., and take out the sample after 18 hours of reaction. Dry the sample in an oven (T=80±3°C, t=24h) to obtain basic magnesium borate whiskers. Both XRD diffraction and elemental analysis prove that the chemical formula of basic magne...

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Abstract

The invention discloses a method of preparing basic magnesium borate crystal whiskers, which includes the steps of: under stirring, adding a mixed alkaline solution to bittern, performing a reaction at 47-53 DEG C for 15 h, and performing a reaction at 175-185 DEG C for 18 h, discharging a product, and drying the product to obtain the basic magnesium borate crystal whiskers, wherein the mixed alkaline solution is prepared by mixing a 0.8 mol / L NaOH solution and a 1 mol / L Na2B4O7 solution according to the volume ratio of 1:1, and the volume ratio of the mixed alkaline solution to the bittern is 3:5-2:3. Through accurate control on types, concentrations and ratios of the mixed alkaline solution and ratio of usage amounts of the mixed alkaline solution to the bittern, the basic magnesium borate crystal whiskers can satisfy demand of length-diameter ratio and satisfy purity demand in industrial applications.

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 borate 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 m3 of bittern as a by-product, of which the resources of magnesium chloride and magnesium sulfate are 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 resources are discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/14C30B29/62C30B29/10
CPCC30B7/14C30B29/10C30B29/62
Inventor 吴健松
Owner LINGNAN NORMAL UNIV
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