Method for producing strontium hydroxide and co-producing sodium sulfide

A technology of strontium hydroxide and sodium hydroxide, applied in the direction of alkali metal sulfide/polysulfide, etc., can solve the problems of long production process, many impurity ions, and high production cost, and achieves low production cost, short process flow, high production cost, etc. The effect of improving the final yield

Pending Publication Date: 2022-01-07
GUIZHOU REDSTAR DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Conventional strontium hydroxide octahydrate is mainly produced by reacting strontium nitrate or strontium chloride with industrial sodium hydroxide, while strontium nitrate or strontium chloride is calcined at high temperature to produce strontium carbonate from celestite, and then rea

Method used

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  • Method for producing strontium hydroxide and co-producing sodium sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Weigh 500g of lapis lazuli (content 82%) and mix with 110g of coal powder evenly, roast in a high-temperature furnace at 1000°C for 1 hour, take it out after cooling slightly, place it in a constant temperature water bath at 90°C, measure 1.5L of hot water in a beaker, Pour all the obtained black ash into a beaker, start stirring at 500r / min, and soak for 1 hour. Take it off, heat filter to obtain 1.3L of leaching yellow water, the concentration of yellow water is 83.25g / L.

[0070] Measure 1L of yellow water (78°C) into a beaker, add 27.82g of NaOH at a ratio of 1:1, stir and mix evenly, seal, and naturally cool to room temperature at 33°C to precipitate crystals. Centrifuge the solid and liquid in the beaker to obtain 155 g of crude strontium hydroxide octahydrate.

Embodiment 2

[0072] Weigh 1000g of lapis lazuli (content 76%) and 200g of coal powder, mix evenly, roast in a high-temperature furnace at 1000°C for 1h, take it out after cooling slightly, place it in a constant temperature water bath at 90°C, measure 3L of hot water in a beaker, and put All the obtained black ash was poured into the beaker, and the stirring was started at 500r / min, and the leaching time was 1h. Take it off, heat filter to obtain 2.6L of leaching yellow water, the concentration of yellow water is 73.59g / L.

[0073] Measure 1L of yellow water (85°C) into a beaker, add 27.82g of NaOH at a ratio of 1:1, stir and mix evenly, seal, and naturally cool to room temperature at 34°C to precipitate crystals. Centrifuge the solid and liquid in the beaker to obtain 147g of crude strontium hydroxide octahydrate.

Embodiment 3

[0075] Weigh 50kg of lapis lazuli (content 78%) and mix it with 10.1kg of coal powder evenly, roast it in a rotary furnace at 1200°C for 2h, transport it to 150L of 90°C hot water for leaching, the leaching time is about 2.5h, after filtering, Get 142L of yellow water for leaching, and the concentration of yellow water is 84.63g / L.

[0076] Transfer the yellow water at 75°C to a tank, add 9.65kg of NaOH at a ratio of 1:1.2, stir and mix evenly, seal, and cool naturally to room temperature at 35°C for crystallization. Solid-liquid centrifugation was carried out through a filter cloth to obtain 21.7 kg of crude strontium hydroxide octahydrate.

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Abstract

The invention belongs to the field of strontium hydroxide preparation, and particularly relates to a method for producing strontium hydroxide and co-producing sodium sulfide, which comprises the following steps: (1) mixing celestite powder and pulverized coal, conducting roasting at high temperature, conducting leaching with hot water, and conducting filtering to obtain yellow water; (2) adding sodium hydroxide into the yellow water, and after the reaction is finished, carrying out solid-liquid separation to obtain strontium hydroxide octahydrate and first filtrate; (3) concentrating the first filtrate, conducting filtering, adding sodium hydroxide into the concentrated filtrate, and after the reaction is finished, carrying out solid-liquid separation to obtain strontium hydroxide octahydrate and second filtrate; and (4) adding a precipitant into the second filtrate, filtering out a precipitate, and conducting heating, evaporating and concentrating to obtain a sodium sulfide product. Compared with a conventional preparation method of strontium hydroxide octahydrate, the preparation method disclosed by the invention has the advantages of short process flow and low production cost.

Description

technical field [0001] The invention belongs to the field of strontium hydroxide preparation, in particular to a method for producing strontium hydroxide and co-producing sodium sulfide. Background technique [0002] Strontium is widely distributed in nature, but due to its relatively active nature, it is difficult to exist in the form of simple substance, mainly in the form of strontium minerals with insoluble salts. There are more than 30 kinds of strontium-containing minerals, and only the main component of strontium salt chemical products is SrSO 4 The lapis lazuli and main components are SrCO 3 strontium ore. China is one of the countries with extremely rich strontium ore reserves, among which celestite ore reserves account for about half of the world's reserves, ranking first in the world. [0003] Strontium hydroxide octahydrate is mainly used to prepare strontium lubricating wax and various strontium salts, and can also be used to improve the dryness of drying oil...

Claims

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Application Information

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IPC IPC(8): C01F1/00C01B17/22
CPCC01F1/00C01B17/22C01P2006/80
Inventor 梁启波万洋曾开文
Owner GUIZHOU REDSTAR DEVING
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