Process for preparing potassium sulfate by sea water

A technology of potassium sulfate and seawater, applied in chemical instruments and methods, alkali metal sulfite/sulfite, alkali metal compounds, etc., can solve the problem that the potassium reserves of salt lakes cannot meet domestic demand, the production of potassium sulfate is restricted by raw material production, Problems such as high cost of potassium raw material sources, to overcome insufficient potassium reserves, low cost, and good quality
CN1792797AInactive Publication Date: 2006-06-28HEBEI UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2006-06-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for preparing potassium sulfate from seawater includes preparing the K-enriched liquid, in which the ammonium sulfate solution is used to elute out the K ions adsorbed by the clinoptilolite in ion exchange column, and preparing potassium sulfate, in which the ammonia is filled in said K-enriched liquid for educing out potassium sulfate. It features no pollution to environment.
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Description

technical field

[0001] The technical scheme of the present invention relates to the preparation of potassium sulfate, specifically the method for preparing potassium sulfate with seawater. technical background

[0002] Potassium sulfate is a high-quality chlorine-free potassium fertilizer. Present potassium sulfate production method mainly contains: take Repone K and sulfuric acid as raw material and adopt high-temperature roasting method (Mannheim method), take Repone K and ammonium sulfate or sodium sulfate as raw material and adopt metathesis conversion method (CN93111750.X, CN93104558 .4, CN94118558.3, CN99115475.4), using salt lake intercrystalline brine as raw material to adopt salt field crystallization method (CN02143641.X, CN03134290.6), and using seawater and sea salt bittern as raw material to adopt ion exchange method (CN02116876.8 ). With the chemical product potassium chloride as raw material, its production cost is directly restricted by the price and source...

Claims

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