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Method for preparing basic magnesium bromide whiskers by utilizing seawater or salt lake bittern

A technology of magnesium bromide and bittern, applied in the field of salt chemical industry, can solve the problems of not using resources to protect the environment, developing and utilizing resources, destroying the environment, environmental damage, etc.

Inactive Publication Date: 2018-06-01
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter which one is, it will cause damage to the environment due to the complicated removal of impurities.
Therefore, this contradictory relationship of "using resources to destroy the environment, or not using resources to protect the environment" has become a scientific bottleneck in the development and utilization of resources.

Method used

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  • Method for preparing basic magnesium bromide whiskers by utilizing seawater or salt lake bittern
  • Method for preparing basic magnesium bromide whiskers by utilizing seawater or salt lake bittern
  • Method for preparing basic magnesium bromide whiskers by utilizing seawater or salt lake bittern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Use Yantian to prepare basic magnesium bromide whiskers from salt lake bittern. The specific operations are as follows:

[0037] (1) Take 300mL of bittern (bitter is taken from Keke Salt Lake), filter and discard the insoluble matter.

[0038] (2) Prepare 0.80mol / L NaOH solution and 3.0mol / L NaBr solution.

[0039] (3) Mix the NaBr solution and the bittern solution at a volume ratio of 1.1:1 to make an alkali mixed solution.

[0040] (4) Take 150mL of alkali mixed solution, place it in a conical flask, put the conical flask in a 30°C water bath to 30°C, and then slowly add 50mL of 0.80mol / L NaOH solution dropwise under stirring to prepare mixed system.

[0041] (5) Place the mixed system in a water bath with a water temperature of 31°C to continue aging for 150 hours, collect the precipitate by filtration, place it in an oven at 50°C, and dry it for 72 hours to obtain basic magnesium bromide whiskers.

[0042] 2. Results

[0043] image 3 (Left) is the scanning ...

Embodiment 2

[0045] 1. Use Yantian to prepare basic magnesium bromide whiskers from salt lake bittern. The specific operations are as follows:

[0046] (1) Take 300mL of bittern (bitter is taken from Xuwen Salt Field, Guangdong), filter and discard the insoluble matter.

[0047] (2) Prepare 0.88mol / L NaOH solution and 3.3mol / L NaBr solution.

[0048] (3) Mix the NaBr solution and the bittern solution at a volume ratio of 1.2:1 to make an alkali mixture.

[0049] (4) Take 150mL of alkali mixture, put it in a conical flask, and place the conical flask in a 33°C water bath to 33°C. Then slowly add 50mL of 0.88mol / L NaOH solution dropwise under stirring.

[0050](5) Place the mixed system in a water bath with a water temperature of 33°C to continue aging for 160 hours, collect the precipitate by filtration, place it in an oven at 49°C, and dry it for 72 hours to obtain basic magnesium bromide whiskers.

[0051] 2. Results

[0052] The XRD test result of the sample shows that it is basically...

Embodiment 3

[0054] 1. Use Yantian to prepare basic magnesium bromide whiskers from salt lake bittern. The specific operations are as follows:

[0055] (1) Take 300mL of bittern (bitter is taken from Subei Salt Field), filter and discard the insoluble matter.

[0056] (2) Prepare 0.720mol / L NaOH solution and 2.7mol / L NaBr solution.

[0057] (3) Mix the NaBr solution and the bittern solution at a volume ratio of 0.9:1 to make a mixed alkali solution.

[0058] (4) Take 150mL of the mixture, put it in a conical flask, and place the conical flask in a water bath at 27°C to 27°C. Then slowly add 50mL of 0.72mol / L NaOH solution dropwise under stirring.

[0059] (5) Place the mixed system in a water bath with a water temperature of 27°C to continue aging for 140 hours, collect the precipitate by filtration, put it in an oven at T=51°C, and dry it for t=72 hours to obtain basic magnesium bromide whiskers .

[0060] 2. Results

[0061] The XRD test result of the sample shows that it is basicall...

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Abstract

The invention discloses a method for preparing basic magnesium bromide whiskers by utilizing seawater or salt lake bittern. The method comprises the following steps: taking V1 volume of bittern, and filtering the bittern to remove insoluble substances; uniformly mixing a 2.7-3.3 mol / L NaBr solution and a bittern solution in a volume ratio of (0.90-1.2):1 to prepare a basic mixed solution; taking V2 volume of the basic mixed solution, keeping the constant temperature of 27-33 DEG C, and slowly dropping V3 volume of a 0.72-0.88 mol / L NaOH solution in a stirring state; and aging the mixed systemfor 140-160h at the constant temperature of 27-33 DEG C, performing filtration, collecting precipitates, and performing drying in an oven to obtain the basic magnesium bromide whiskers, wherein the ratio of V1 to V2 to V3 is 6:3:1. A lot of high-quality basic magnesium bromide whiskers are prepared only by virtue of self-cleanness of the whiskers in preparation processes, many impurity removal steps are omitted, and thus the whole preparation processes can not generate waste residues, wastewater and waste gas, have no noise, can not influence the ecological balance and can not cause any pollution or public nuisance.

Description

technical field [0001] The invention belongs to the technical field of salt chemical industry. More specifically, it relates to a method for preparing basic magnesium bromide whiskers by using seawater or salt lake bittern. Background technique [0002] Bittern is a by-product of the seawater or salt lake salt industry that contains high concentrations of valuable minerals such as potassium, magnesium, bromine and sulfate. At present, the process of preparing basic basic magnesium bromide whiskers by using seawater or salt lake bittern needs to go through a complicated impurity removal process. Researchers focus on how to remove bittern impurities first, and then prepare the expected material, or remove impurities while preparing, or firstly prepare crude products, and then remove impurities, etc. No matter what kind it is, it will cause damage to the environment due to the complicated removal of impurities. Therefore, this contradictory relationship of "either using 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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