CN1049111A

CN1049111A - The acid soak acid heat activation of Concave-convex clay rod

Info

Publication number: CN1049111A
Application number: CN 90105849
Authority: CN
Inventors: 冯启明; 田煦
Original assignee: SICHUAN BUILDING MATERIAL INDUSTRY COLLEGE
Current assignee: SICHUAN BUILDING MATERIAL INDUSTRY COLLEGE
Priority date: 1990-07-03
Filing date: 1990-07-03
Publication date: 1991-02-13
Anticipated expiration: 2005-07-03
Also published as: CN1022984C

Abstract

The activation of Concave-convex clay rod acid soak acid heat, technological process is simple, and is basic identical with dry method thermal activation technology, but product decolorizing ability height.It is characterized in that: with 0.5-100cm ³The Concave-convex clay rod raw ore that the smectite content of lumpiness is few, with concentration is the static immersion of inorganic acid solution (sulfuric acid, hydrochloric acid solution etc.) 2-100 hour of 1-15%, drain extruding in flakes, 280-350 ℃ of down activation 30-50 minute, be ground into 150-250 purpose decolorizing ability and be 250 ± 5 active attapulgite soil with general revolving drier.

Description

The acid soak acid heat activation of Concave-convex clay rod

The present invention is a kind of acid soak acid heat activation of Concave-convex clay rod.

Concave-convex clay rod has colloidal property and decolouring absorption property, and the decolorizing purification that can be used for products such as petrochemical industry, edible oil, drinks, carbohydrate is handled, and also is used for removing aspects such as poison, deodorizing, environmental protection, protection; Application prospect at aspects such as oil, geothermal drilling, medicine, fertilizer, building materials also is wide.But the decolouring absorption property of Concave-convex clay rod raw ore is also not really excellent.

In order to improve the decolouring absorption property of Concave-convex clay rod, often need the Concave-convex clay rod raw ore is activated.At present, Concave-convex clay rod activating technology both domestic and external is broadly divided into three kinds:

One, dry method thermal activation: this method is with raw ore activation at a certain temperature after picking, perhaps crushing raw ore being become to soak after certain lumpiness the certain hour filter does, extruding in flakes again, activate at a certain temperature, the dry activation technological process is simple, accompanying drawing 1, it is its technological process, but the decolouring absorption property of product is relatively poor, and the product decolorizing ability is generally 80-130, thereby range of application is restricted.

Two, wet process acid activation: this method be with concentration be the inorganic acid (sulfuric acid, hydrochloric acid) of 4-20% by water: native ≈ joins in the attapulgite raw ore that is crushed to certain particle size (being generally the 20-60 order) and make suspended nitride under stirring condition at 2: 1, after feeding steam heated activation certain hour again, with the slurry after the activation of a large amount of water cyclic washing 3-5 time, the acid content of dissociating in slurry reaches till the set quota (＜0.2%).Activated attapulgite is promptly made in slurry filter-press dehydration, drying, pulverizing.Accompanying drawing 2 is its technological processes.

The active attapulgite soil that the wet process acid activating process is produced, the decolouring absorption property is good than the dry method thermal activation, and decolorizing ability is generally 230-250, but wet process acid activating process flow process complexity.Inorganic acid is serious to equipment corrosion, needs periodic replacement.Water consumption is big during cyclic washing, produce simultaneously to contain sour sewage in a large number, and pressure-filtering dehydration drying energy consumption height, the rate of recovery of product only is 60-75%.Thereby the production cycle is long, the cost height.

Three, semidry method acid heat activation: Chinese patent: application number 89105893.1

This method is: attapulgite content is broken into 1-2cm greater than 50% clay raw ore ³Particle, through manually selecting deproteinized stone, quartz wedge and organic impurities etc., soak, drain and be squeezed into thin slice, dry abrasive dust screening, the water that adds the 15-70% of the inorganic acid (hydrochloric acid, sulfuric acid etc.) of the 1-15% of native weight and native weight again is mixed into flowable granule, through full and uniform thermal activation in 10-60 minute, wear into 160-240 purpose active attapulgite soil under 120-600 ℃ temperature, accompanying drawing 3 is its technological processes.

The active attapulgite soil that this method is produced, its decolouring adsorption capacity activates near wet process acid, and decolorizing ability is generally 230-250, and do not have the three wastes in the production process substantially and produce, but this method technological process complexity.The acid heat activation equipment requires the stainless steel special material, thereby the production cost height.

In addition, United States Patent (USP): US 4120782(CI.208-305; CIOG 25/12) the 03.1.1978 report: the anhydrous HCl gas with 1% feeds activation attapulgite in the attapulgite heater that dry production is housed, also can increase the decolouring adsorption capacity of attapulgite, but the decolouring adsorption capacity of the active attapulgite soil that this method is produced needs the activation equipment of the special material of the steam corrosion of anti-HCI simultaneously still less than wet method.

Purpose of the present invention: be in order fully to simplify technological process, to eliminate environmental pollution basically, cut down the consumption of energy significantly, increasing substantially the decolouring adsorption capacity of active attapulgite soil simultaneously.

Concave-convex clay rod acid soak acid heat activation of the present invention, be that non-clay mineral content is few, the less Concave-convex clay rod raw ore of smectite content in the clay mineral, be broken into certain lumpiness, with the static immersion certain hour of certain density inorganic acid solution (hydrochloric acid, sulfuric acid etc.), drain extruding in flakes, in the revolving drier equipment of general material, activate certain hour at a certain temperature, be ground into the activation of decolouring adsorption capacity and wet process acid, the suitable active attapulgite soil of semidry method acid heat activation product decolorizing ability.

Technical characterictic of the present invention is: the acid soak acid heat activation of Concave-convex clay rod is the static immersion of the inorganic acid solution 0.5-100CM of 1-15% with concentration ³The Concave-convex clay rod raw ore of lumpiness, soak time 2-100 hour, drain (attapulgite clay not multiviscosisty in the static immersion process of inorganic acid solution, very easily drain), extruding in flakes, under 280-350 ℃ temperature, activate 30-50 minute with general revolving drier, be ground into 150-250 purpose decolorizing ability and be 250 ± active attapulgite soil.Accompanying drawing 4 is the invention process technological processes.

This method has been simplified the drying before the acid heat activation, crushes and screens, and adds water and adds three technological processes of sour batch mixing, only needs the revolving drier activation equipment of general material to get final product simultaneously.

The embodiment of the invention 1:

With the concentration of 80-90 part is that 100 parts of lumpiness of the static immersion of sulfuric acid solution of 1-15% are 0.5-100M ³Concave-convex clay rod raw ore 2-100 hour, drain extruding after, 280-350 ℃ of activation 30-50 minute down, be ground into 150-250 purpose decolorizing ability and be 250 ± 5 active attapulgite soil.

The embodiment of the invention 2:

With 80-90 part concentration is that the static immersion lumpiness of hydrochloric acid solution of 1-13% is 0.5-100CM ³Concave-convex clay rod raw ore 2-100 hour, drain extruding after, 280-350 ℃ of activation 30-50 minute down, being ground into 150-250 purpose decolorizing ability is 245 ± 5 active attapulgite soil.

Concave-convex clay rod acid soak acid heat activation of the present invention, its technological process is simple, basic identical with dry method thermal activation technology, but raw ore is soaked acid activation owing to added inorganic acid, the decolouring adsorption capacity of its product has had than the decolouring adsorption capacity of the product of dry activation and has increased substantially, with the wet process acid activation, the product decolouring adsorption capacity that the activation of semidry method acid heat is produced is suitable.Compare with the wet process acid activation, fully simplified technological process, reduced energy consumption significantly, the water consumption, this method does not wash with water, has eliminated environmental pollution, and production equipment is not had corrosion, has reduced production cost significantly.Compare with semidry method acid heat activation, simplified the three step process flow process, activation equipment has shortened the production cycle with the stainless steel activation equipment that the revolving drier of general material has replaced the semidry method acid heat to activate, and has reduced production cost significantly.

By estimating: produce one ton of active attapulgite soil with Concave-convex clay rod acid soak acid heat activation method, its totle drilling cost is about 200 yuan, decolorizing ability is that about 200 the commercially available price of atlapulgite is the (atlapulgite that enemy mountain, Zhejiang china clay ore deposit company produces more than 500 yuan/ton, the power of taking off is 130-150, price is 475 yuan/ton) this method is put into production, will produce remarkable economic efficiency; Present many industries, especially petrochemical industry department, the high atlapulgite of decolorizing ability is badly in need of in light industry, grain and oil department, and this method is put into production, also will produce obvious social.

Claims

A kind of Concave-convex clay rod acid soak acid heat activation is characterized in that: with 0.5-100CM ³The Concave-convex clay rod raw ore of lumpiness is the static immersion of 1-15% inorganic acid solution 2-100 hour with concentration, drains extruding in flakes, and activation is 30-50 minute under 280-350 ℃ of temperature.