Method for preparing chemical raw materials by using alkali method to process potassium fertilizer intermediate

Abstract

The invention discloses a method for preparing chemical raw materials by using an alkali method to process a potassium fertilizer intermediate, and the method specially includes the following steps: raw materials are dissolved and mixed, to be more specific, potassium hydroxide is dissolved with distilled water, then the potassium fertilizer intermediate is added for dissolving to get a mixed solution, the mass ratio of potassium fertilizer intermediate to potassium hydroxide is 1:2-5; and then by boiling, filtering, processing of a filtrate a, and processing of a filtrate b, baking and returning, the chemical raw material are prepared. According to the method, by the reprocessing of the potassium fertilizer intermediate, potassium feldspar utilization process steps are optimized, the potassium feldspar decomposition rate is improved, the problem of the shortage of potassium fertilizer raw material resources is alleviated, the comprehensive utilization rate of by-product is improved, the generation of waste water, waste gas and waste slag is reduced, the energy consumption is reduced, the technological process is simple, and the production cost for enterprises is saved.

Description

technical field

[0001] The invention relates to chemical and chemical technology, in particular to a method for obtaining chemical raw materials from potassium fertilizer intermediates by alkaline treatment. Background technique

[0002] There are abundant potassium-containing salt ore resources in the world, but most of them are insoluble water-containing potassium-containing salt ores; Occupying 0.66%, and concentrated in the Qinghai area, which leads to difficult mining and high transportation costs. According to statistics, the gap of potassium fertilizer in my country is still as high as 4 million tons per year. Therefore, the country still needs to spend a large amount of foreign capital to import potash fertilizers to meet agricultural needs every year. For this reason, it is necessary for us to develop and utilize water-insoluble potash-containing salt mines.

[0003] Potassium feldspar is a common rock-forming mineral in the earth's crust. It belongs to silicate a...

Examples

Embodiment 1

[0029] Weigh 9.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker containing KOH solution and mix it, then heat it to boil, so that the boiled The volume of the solution was kept at 50ml, and the pH of the solution was controlled by KOH solution to be 14, and heated and boiled for 65 minutes. During the heating reaction, the potassium fertilizer intermediate was partially reacted and dissolved to generate a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 1h during the filtering process to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 2h to get SiO 2 10H 2 O,; SiO can be obtained by baking for 4h 2 2H 2 O, extract the Si element in potassium feldspar.

[0030] Then slowly add the filtered filtrate a with sulfuric acid with...

Embodiment 2

[0033]Weigh 6.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker where KOH is dissolved, and mix it, then heat it to boil to make the volume of the boiled solution Keep it at 50ml, and use KOH solution to control the pH of the solution to be 14, heat and boil for 75min, during the heating reaction process, part of the potassium fertilizer intermediate reacts and dissolves, and produces a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 2h during the filtering process to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 2.5h to get SiO 2 10H 2 O; SiO can be obtained by baking for 3.5h 2 2H 2 O, to extract the Si element in potassium feldspar.

[0034] Then slowly add the filtered filtrate a with sulfuric acid with a molar conce...

Embodiment 3

[0037] Weigh 12.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker where KOH is dissolved, and mix it, then heat and boil it to make the volume of the boiled solution Keep it at 50ml, and use KOH solution to control the pH of the solution to be 14, heat and boil for 70min, during the heating reaction process, part of the potassium fertilizer intermediate reacts and dissolves, and produces a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 1.5h during the filtering process, to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 3h to get SiO 2 10H 2 O and SiO 2 2H 2 O mixture to extract the Si element in potassium feldspar.

[0038] Then slowly add the filtered filtrate a with sulfuric acid with a molar concentration of 1mol / L to...

technical field

[0001] The invention relates to chemical and chemical technology, in particular to a method for obtaining chemical raw materials from potassium fertilizer intermediates by alkaline treatment. Background technique

[0002] There are abundant potassium-containing salt ore resources in the world, but most of them are insoluble water-containing potassium-containing salt ores; Occupying 0.66%, and concentrated in the Qinghai area, which leads to difficult mining and high transportation costs. According to statistics, the gap of potassium fertilizer in my country is still as high as 4 million tons per year. Therefore, the country still needs to spend a large amount of foreign capital to import potash fertilizers to meet agricultural needs every year. For this reason, it is necessary for us to develop and utilize water-insoluble potash-containing salt mines.

[0003] Potassium feldspar is a common rock-forming mineral in the earth's crust. It belongs to silicate a...

Examples

Embodiment 1

[0029] Weigh 9.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker containing KOH solution and mix it, then heat it to boil, so that the boiled The volume of the solution was kept at 50ml, and the pH of the solution was controlled by KOH solution to be 14, and heated and boiled for 65 minutes. During the heating reaction, the potassium fertilizer intermediate was partially reacted and dissolved to generate a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 1h during the filtering process to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 2h to get SiO 2 10H 2 O,; SiO can be obtained by baking for 4h 2 2H 2 O, extract the Si element in potassium feldspar.

[0030] Then slowly add the filtered filtrate a with sulfuric acid with...

Embodiment 2

[0033]Weigh 6.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker where KOH is dissolved, and mix it, then heat it to boil to make the volume of the boiled solution Keep it at 50ml, and use KOH solution to control the pH of the solution to be 14, heat and boil for 75min, during the heating reaction process, part of the potassium fertilizer intermediate reacts and dissolves, and produces a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 2h during the filtering process to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 2.5h to get SiO 2 10H 2 O; SiO can be obtained by baking for 3.5h 2 2H 2 O, to extract the Si element in potassium feldspar.

[0034] Then slowly add the filtered filtrate a with sulfuric acid with a molar conce...

Embodiment 3

[0037] Weigh 12.0g of KOH, pour it into a 100ml beaker, add distilled water to dissolve it, then weigh 3.0g of potassium fertilizer intermediate, add it to the beaker where KOH is dissolved, and mix it, then heat and boil it to make the volume of the boiled solution Keep it at 50ml, and use KOH solution to control the pH of the solution to be 14, heat and boil for 70min, during the heating reaction process, part of the potassium fertilizer intermediate reacts and dissolves, and produces a white solid substance. Then filter the reacted solution, and constantly wash the white solid with distilled water for 1.5h during the filtering process, to obtain the white solid and filtrate a, wherein the white solid is SiO 2 ·nH 2 O, put the white solid in a drying oven and bake for 3h to get SiO 2 10H 2 O and SiO 2 2H 2 O mixture to extract the Si element in potassium feldspar.

[0038] Then slowly add the filtered filtrate a with sulfuric acid with a molar concentration of 1mol / L to...

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