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Efficient lithium-based oxygen generation molecular sieve and preparation method thereof

A molecular sieve and lithium-based technology, which is applied in the field of high-efficiency lithium-based oxygen-generating molecular sieves and its preparation, can solve problems such as poor comprehensive performance and affecting the separation effect of pressure swing adsorption oxygen-generating devices, and achieve excellent comprehensive performance.

Inactive Publication Date: 2016-10-05
MINGGUANG FEIZHOU NEW MATERIAL
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Problems solved by technology

At present, there are many types of molecular sieves used in PSA oxygen generators on the market, but most of them have the disadvantage of poor comprehensive performance, which affects the final separation effect of PSA oxygen generators.

Method used

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  • Efficient lithium-based oxygen generation molecular sieve and preparation method thereof
  • Efficient lithium-based oxygen generation molecular sieve and preparation method thereof

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Embodiment Construction

[0016] A high-efficiency lithium-based oxygen-producing molecular sieve, made of the following raw materials by weight (kg): bentonite 30, stilbite 16, laponite 12, palygorskite 13, pyrophyllite 10, pearlite 8, lithium magnesium silicate 4.5, Sodium hydroxide 41, sodium metaaluminate 33, sodium silicate nonahydrate 25, seed crystal directing agent 9;

[0017] The preparation method of described seed directing agent is as follows: a, get the raw material of following weight (kg): bentonite 13, stilbite 8, hectorite 7, sodium metasilicate nonahydrate 25, sodium hydroxide 20, metaaluminic acid Sodium 12; b. Mix bentonite, stilbite and laponite evenly, calcinate at 660°C for 1.5h, cool naturally to room temperature, and mix with sulfuric acid solution with a molar concentration of 1.5mol / L according to the ratio of solid to liquid ratio of 1:18 , heated in a water bath to 75°C, kept warm for 35min, filtered, washed, dried, calcined at 880°C for 2.5h, naturally cooled to room tempe...

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Abstract

The invention discloses an efficient lithium-based oxygen generation molecular sieve and a preparation method thereof. The molecular sieve is prepared from, by weight, 25-35 parts of bentonite, 14-18 parts of stilbite, 10-15 parts of hectorite, 10-15 parts of palygorskite, 8-14 parts of pyrophyllite, 5-10 parts of perlite, 3-6 parts of magnesium lithium silicate, 33-45 parts of sodium hydroxide, 26-38 parts of sodium metaaluminate, 20-30 parts of sodium metasilicate nonahydrate and 6-12 parts of seed crystal guide agent. The lithium-based molecular sieve prepared from the method is more than three times of conventional molecular sieves in nitrogen balance adsorption capacity and separation coefficient, far higher than the conventional molecular sieves in adsorption rate and excellent in comprehensive performance, and a good foundation is provided for development of efficient oxygen generation equipment.

Description

technical field [0001] The invention relates to a molecular sieve and a preparation method thereof, in particular to a high-efficiency lithium-based oxygen-producing molecular sieve and a preparation method thereof. Background technique [0002] In recent years, due to the development and utilization of molecular sieve adsorbents for oxygen production and the continuous improvement of process flow, pressure swing adsorption oxygen production technology has developed rapidly. The pressure swing adsorption air separation oxygen production process has the characteristics of short start-up time, short construction period, low operating cost, high degree of automation, simple maintenance, and low comprehensive energy consumption. It is widely used in iron and steel, nonferrous metallurgy, chemical industry, furnace energy saving, and environmental protection. , glass, paper, medical and other fields. [0003] As we all know, molecular sieve adsorbent is the key core of pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04C01B39/02
CPCC01B39/026C01B39/04C01P2006/11
Inventor 吴佳蕾顾文宇
Owner MINGGUANG FEIZHOU NEW MATERIAL
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