Magnesium sulfate and manufacturing method thereof

A manufacturing method and technology of magnesium sulfate, applied in magnesium sulfate and other directions, can solve the problems of high cost of raw materials, extensive use, low efficiency and efficiency, and achieve the effects of good product quality, promoting the development of circular economy industries, and no pollution and secondary pollution.

Active Publication Date: 2010-04-28
陈玉芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production process of this method is simple and extensive, the cost of raw materials is high, and the efficiency and benefit are low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, produce 1000 kilograms of magnesium sulfates.

[0018] Get 1000 kilograms of chemical by-product sulfuric acid (mass percentage concentration is 60%, is the by-product sulfuric acid associated when producing products such as p-toluenesulfonyl chloride, o-toluenesulfonyl chloride or o / p-toluenesulfonyl chloride.), mass percentage content 80% 345 kg of magnesium oxide powder, 0 kg of 98% industrial concentrated sulfuric acid and 0 kg of water (because the mass percentage concentration of the chemical by-product sulfuric acid is 60%, between 55% and 70%, so it is not necessary to process industrial concentrated sulfuric acid and Water) was evenly added in proportion to the mixing reactor one after another, and stirred and mixed to prepare a moderately dry and dilute slurry. At the outlet of the mixer, the temperature of the slurry discharged from the overflow was controlled at 140 degrees. Then, the reaction slurry discharged after the reaction is successivel...

Embodiment 2

[0019] Embodiment 2, produce 1000 kilograms of magnesium sulfates.

[0020] Get 660 kilograms of chemical by-product sulfuric acid (mass percentage concentration 40%, take chlorosulfonic acid as raw material to participate in the by-product sulfuric acid associated in chemical production reaction), 340 kg of magnesia powder with mass percentage content 85%, 98% industrial 340 kg of concentrated sulfuric acid and 0 kg of water. Add it into the mixing reactor evenly in proportion, carry out stirring and mixing reaction, and prepare a dry and thin moderate slurry. At the outlet of the mixer, the temperature of the slurry discharged from the overflow is controlled at 120 degrees. Then, the reaction slurry discharged after the reaction is successively transferred to the conversion chamber and left for 70 minutes to be matured, dried and solidified. 0.8H2O的素食石。 Finally, through crushing, shaping, cooling and other processes, magnesium sulfate in the form of MgSO4. 0.8H2O is obtaine...

Embodiment 3

[0021] Embodiment 3, produce 1000 kilograms of magnesium sulfates.

[0022] Get 860 kilograms of chemical by-product sulfuric acid (mass percentage concentration 75%, is the sulfuric acid formed in the process of producing glufosinate and dimethyl phosphite), 355 kilograms of magnesium oxide powder with mass percentage content 70%, 98% industrial concentrated sulfuric acid 0 kg and 140 kg of water. Add it into the mixing reactor evenly and in succession according to the proportion, carry out stirring and mixing reaction, and prepare a dry and thin moderate slurry. At the outlet of the mixer, the temperature of the slurry discharged from the overflow is controlled at 155 degrees. Then, the reaction slurry discharged after the reaction is successively transferred to the conversion chamber and left for 30 minutes to be matured, dried and solidified. Finally, the magnesium sulfate in the form of MgSO4.1.5H2O can be obtained through crushing, shaping and cooling.

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PUM

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Abstract

The invention discloses a magnesium sulfate and a manufacturing method thereof, and the magnesium sulfate has the chemical molecular formula of MgSO4. nH2O, wherein n is arbitrary value in 0.0-5.0. The magnesium sulfate is manufactured by the steps of: 1. gradually and evenly adding chemical by-product sulfuric acid, industrial concentrated sulfuric acid, water and magnesium oxide powder into a reaction mixer to be fully stirred and mixed together for chemical reaction, preparing into slurry, and determining the adding quantity of the industrial concentrated sulfuric acid and the water according to the concentration of the chemical by-product sulfuric acid; and controlling the dry degree of the reaction slurry and the temperature at an outlet; 2. further reacting and curing the prepared slurry obtained by the reaction, drying and solidifying the slurry by the self reaction heat, and maintaining the solidifying time within 20-180min; and 3. shaping, cooling and packaging the cured material, and obtaining the magnesium sulfate. The invention is manufactured by comprehensively utilizing the chemical by-product sulfuric acid as raw materials, has high production efficiency and no pollution, and is economical, energy-saving and environment-friendly, and the manufactured magnesium sulfate has high cost performance.

Description

technical field [0001] The present invention relates to a kind of magnesium sulfate and its preparation method, especially a kind of method and the prepared magnesium sulfate which utilize the by-product sulfuric acid produced in chemical production to manufacture magnesium sulfate. Background technique [0002] Magnesium sulfate is rich in sulfur and magnesium elements and is widely used in agricultural production. At present, there are many varieties of magnesium sulfate, and there are many production methods, among which the widely used method is to chemically synthesize magnesium sulfate with powdered magnesium oxide and industrial concentrated sulfuric acid. However, the production process of this method is simple and extensive, the cost of raw materials is high, and the efficiency and benefit are low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a kind of magnesium sulfate and its manufacturing method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/40
Inventor 陈玉芳
Owner 陈玉芳
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