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Technical method for producing P type zeolite utilized in bath by using alkali solution to activate bentonite under high temperature and high pressure

An alkaline solution activation, high temperature and high pressure technology, applied in chemical instruments and methods, inorganic/elemental cleaning compositions, inorganic chemistry, etc., can solve the problems of long activation time, high energy consumption, complex process flow, etc., and improve the deep processing technology. , the effect of improving resource utilization and reducing production costs

Inactive Publication Date: 2006-02-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of low leaching rate and leaching rate of silicon and aluminum, long activation time, difficult treatment of waste acid, and complicated process flow.
Disclosed in CN1415721A patent document is a kind of method that uses high-temperature roasting alkali fusion to activate, and this method has the shortcoming that energy consumption is higher

Method used

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  • Technical method for producing P type zeolite utilized in bath by using alkali solution to activate bentonite under high temperature and high pressure
  • Technical method for producing P type zeolite utilized in bath by using alkali solution to activate bentonite under high temperature and high pressure

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Experimental program
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Effect test

Embodiment 1

[0018] The process steps of activating bentonite with high-temperature and high-pressure alkali solution to produce P-type zeolite for washing are as follows:

[0019] 1. Purification: The above-mentioned bentonite mineral powder is prepared into a dilute slurry, which is naturally settled to remove the impurities in the lower layer, dried, and then crushed until the particle size is less than 180 mesh, that is, the purified bentonite mineral powder is obtained;

[0020] 2. Activation: After mixing 40g of purified bentonite mineral powder with 40g of caustic soda (sodium hydroxide) and 180ml of water, react in an autoclave at 100°C for 1 hour to obtain the activated feed solution;

[0021] 3. Mold adjustment-reaction aging: Add aluminum hydroxide to the activated material liquid to adjust Al 2 o 3 : SiO 2 :Na 2 O:H 2 The molar ratio of O is 1: 2: 3: 180, aged at a temperature of 45° C. for 8 hours to obtain the raw material liquid of P-type zeolite for washing;

[0022] 4...

Embodiment 2

[0026] The process steps of activating bentonite with high-temperature and high-pressure alkali solution to produce P-type zeolite for washing are as follows:

[0027] 1. Purification: The above-mentioned bentonite mineral powder is prepared into a dilute slurry, which is naturally settled to remove the impurities in the lower layer, then dried, and then crushed to a particle size of less than 180 mesh to obtain the purified bentonite mineral powder;

[0028] 2. Activation: After mixing 40g of purified bentonite mineral powder with 44g of caustic soda (sodium hydroxide) and 185ml of water, react in an autoclave at 120°C for 6 hours to obtain the activated feed solution;

[0029] 3. Mold adjustment-reaction aging: Add aluminum hydroxide to the activated material liquid to adjust Al 2 o 3 : SiO 2 :Na 2 O:H 2 The molar ratio of O is 1: 2.1: 3: 200, aged at a temperature of 40° C. for 5 hours to obtain the raw material liquid of P-type zeolite for washing;

[0030] 4. Crystal...

Embodiment 3

[0034] The process steps of activating bentonite with high-temperature and high-pressure alkali solution to produce P-type zeolite for washing are as follows:

[0035] 1. Purification: The above-mentioned bentonite mineral powder is prepared into a dilute slurry, which is naturally settled to remove the impurities in the lower layer, dried, and then crushed until the particle size is less than 180 mesh, that is, the purified bentonite mineral powder is obtained;

[0036] 2. Activation: After mixing 40g of purified bentonite mineral powder with 50g of caustic soda (sodium hydroxide) and 170ml of water, react in an autoclave at 180°C for 3 hours to obtain the activated feed solution;

[0037] 3. Mold adjustment-reaction aging: Add aluminum hydroxide to the activated material liquid to adjust Al 2 o 3 : SiO 2 :Na 2 O:H 2 The molar ratio of O is 1: 2.3: 3.2: 220, aged at a temperature of 40° C. for 8 hours to obtain the raw material liquid of P-type zeolite for washing;

[00...

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Abstract

A process for preparing the P-type zeolite used for detergent includes purifying and pulverizing bentone as raw material, proportionally mixing it with sodium hydroxide and water, high-pressure reaction at 100-300 deg.C, adding aluminium hydroxide, regulating the mole ratio between Al2O3, SiO2, Na2O and H2O, ageing at 60-100 deg.C for 2-8 hrs, adding crystal seed, crystallizing at 60-120 deg.C for 5-24 hrs, solid-liquid separation, and further treating to solid phase. Its advantages are high utilization rate of bentone, and low energy consumption.

Description

technical field [0001] The invention belongs to a method for producing P-type zeolite for washing, in particular to a process for producing P-type zeolite for washing by activating a high-temperature and high-pressure alkali solution. Background technique [0002] Bentonite is an abundant non-metallic mineral resource. Since it was put on the market as a product in 1888, it has a history of 115 years. During this period, the mining, processing and application of bentonite have made great progress. In 1988, the world's output reached 6 million tons, and the application field has expanded to 24 departments. There are more than 1,000 uses, and hundreds of them have applied for patents. At present, the demand for bentonite products is increasing at an average annual rate of 3.1%. The main chemical composition of bentonite is SiO 2 and Al 2 o 3 , In addition, it contains a small amount of oxides such as calcium, magnesium, and iron. Because of its special layered structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D3/12C01B33/46
Inventor 曹吉林李春旭谭朝阳李琳
Owner HEBEI UNIV OF TECH
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