A method for preparing zeolite molecular sieves from opal attapulgite clay

A technology of attapulgite clay and zeolite molecular sieve, applied in chemical instruments and methods, crystalline aluminosilicate zeolite, A-type crystalline aluminum silicate zeolite, etc., can solve problems affecting the mine environment and the economic benefits of mining enterprises, etc. To achieve the effect of solving the utilization problem

Active Publication Date: 2019-08-02
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, mine waste rocks pile up like mountains, which not only affects the mine environment, but also affects the economic benefits of mining enterprises

Method used

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  • A method for preparing zeolite molecular sieves from opal attapulgite clay
  • A method for preparing zeolite molecular sieves from opal attapulgite clay
  • A method for preparing zeolite molecular sieves from opal attapulgite clay

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Embodiment 1

[0023] The present embodiment prepares the zeolite molecular sieve according to the following steps:

[0024] A. Store the opal attapulgite clay, after 6 months of natural dry and wet weathering, pass through a 2mm sieve, and the sieve is the opal material, which is used for the synthesis of zeolite molecular sieves;

[0025] B. Stockpile the opal material obtained by screening, soak the material at 70°C for 2 hours with hydrochloric acid with a mass concentration of 10%, and dissolve the impurity components dolomite and attapulgite therein; after the soaking is completed, discharge the waste liquid and obtain the solid After washing with water, draining and grinding through a 200-mesh sieve, the opal powder is obtained;

[0026] C. Dissolve 1.82g NaOH in 15mL deionized water, add it to the polytetrachlorethylene lined reactor, add 3g of opal powder, and take 3.6g NaAlO 2 Dissolve in 17mL water to make NaAlO 2 solution, then the NaAlO 2 Add the solution into the reaction ke...

Embodiment 2

[0031] The present embodiment prepares the zeolite molecular sieve according to the following steps:

[0032] A. Store the opal attapulgite clay, after 3 months of natural dry-wet alternating weathering, pass through a 2mm sieve, and the material on the sieve is the opal material, which is used for the synthesis of zeolite molecular sieves;

[0033] B, stockpile the opal material obtained by screening, soak the material for 3 hours with hydrochloric acid with a mass concentration of 15%, dissolve the impurity components dolomite and attapulgite therein; after soaking is completed, the waste liquid is discharged, and the gained solid is washed with water and drain After drying, grind through a 200-mesh sieve to obtain opal powder;

[0034] C. Mix opal powder with sodium metaaluminate, sodium hydroxide and water according to the molar ratio of silicon to aluminum is 2:1, the molar ratio of alkali to silicon is 1.5:1, and the molar ratio of water to sodium is 60:1. React in a th...

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Abstract

The invention discloses a method for preparing zeolite molecular sieves from opal-containing attapulgite clay. According to the method, firstly, opal materials are obtained through beneficiation and then soaked in hydrochloric acid, so that dolomite and attapulgite in the opal materials are dissolved, finally, obtained opal powder is mixed with an aluminum compound, sodium hydroxide and water in proportion, the mixture reacts in a hydrothermal reaction kettle for 3-10 h at the temperature of 80-130 DEG C, and the zeolite molecular sieves are obtained. With the adoption of the method, the problem about utilization of barren rock containing rich opal in attapulgite ore deposits is solved effectively, and the obtained zeolite meets the performance standard of 4A zeolite molecular sieves.

Description

technical field [0001] The invention relates to a method for resource utilization of opal attapulgite clay and synthesis of zeolite molecular sieve. Background technique [0002] Attapulgite clay is a characteristic non-metallic mineral resource in my country, with huge reserves and the largest potential resources in the world. How to develop this characteristic resource reasonably and efficiently and make full use of its resource value has been highly valued by the local governments of Anhui, Jiangsu, Gansu, Inner Mongolia, Henan and other relevant national departments. [0003] Due to geological origin, attapulgite deposits are often rich in opal bands and interlayers, and this type of ore is called opal attapulgite clay. Due to the excessive content of opal in the ore, its adsorption performance and colloidal performance are very poor, and it has not been rationally utilized. At present, the mines in Xuyi County and Mingguang City alone produce more than 300,000 tons of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/14C01B39/18C01F7/00
CPCC01B39/14C01B39/18C01F7/00C01P2002/72C01P2004/02C01P2004/03C01P2004/04
Inventor 邬宗姗陈天虎刘海波邹雪华王灿陈冬
Owner HEFEI UNIV OF TECH
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