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Comprehensive utilization method of sea salt bittern

A bittern and sea salt technology, applied to calcium/strontium/barium halides, calcium/strontium/barium sulfates, alkali metal chlorides, etc., can solve the problems of less developed products and high energy consumption, and achieve less cost input, Reasonable route and obvious economic benefits

Inactive Publication Date: 2007-01-31
杨秀文
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Problems solved by technology

[0003] The present invention is used to overcome the defects existing in the prior art and provide a new comprehensive utilization method of sea salt and bittern, so as to effectively solve the problems of high energy consumption and few developed products in the utilization of sea salt and bittern

Method used

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  • Comprehensive utilization method of sea salt bittern

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Embodiment Construction

[0019] The following is an example of actual industrialized trial production: Take 70,000 cubic meters of bittern from sea salt in the salt area and transport it to the brine storage pool. The average test result is 27.2oBé.

[0020] (1), preparation process of calcium sulfate hemihydrate: carry out mixed reaction with calcium liquid after sea salt bittern is filtered to remove impurity treatment, in the Ca that originates from calcium liquid 2+ Ions and SO from sea salt bittern 4 2- The ion molar ratio is 1.3:1, and the reaction temperature is 35-40°C. After mixing evenly, the slurry is separated into solid and liquid to obtain calcium sulfate dihydrate and magnesium liquid. The calcium sulfate dihydrate is washed with water until no Cl is detected in the washing liquid. - As the standard, calcium sulfate dihydrate containing 6-8% of free water was obtained, and then 3530 tons of calcium sulfate hemihydrate was obtained under the condition of 170° C. for dehydration and dryi...

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Abstract

The present invention relates to a comprehensive utilization method of bittern. Said method uses bittern as raw material and adopts the following steps: making the bittern undergo the processes of mixing reaction with calcium liquor, synthesis reaction with lime cream, evaporation concentration crystallization, four-step evaporation, aerifying chlorine, filtering and removing impurity and solid-liquid separation, etc, so as to make the bittern into several products of hemi-hydrate calcium sulfate, magnesium hydroxide, industrial salt, potassium chloride, industrial bromine and dehydrate calcium chloride.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of sea salt bittern, in particular to a method for preparing magnesium hydroxide, calcium sulfate hemihydrate, industrial sodium chloride, potassium chloride, bromine, and calcium chloride dihydrate by using sea salt bittern as raw materials production method. Background technique [0002] Sea salt bittern is a by-product left after the seawater salt industry evaporates and concentrates seawater and precipitates most of the sodium chloride. 3 bittern. Sea salt bittern mainly contains Na in addition to water + 、K + , Mg 2+ , Cl - , SO 4 2- 、Br - six ions. In the production of sea salt, if the bittern is not fully discharged from the system, the production capacity and quality of sea salt will be significantly reduced. If the bittern is not utilized and discharged back to the sea, it will pollute the sea area. For this reason, it is necessary to continuously research and develop th...

Claims

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Application Information

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IPC IPC(8): C01F11/46C01F11/02C01F5/14C01D3/04C01B7/09C01F11/24
Inventor 杨秀文袁建军
Owner 杨秀文
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