CN103172874B - Method for preparing particles by taking chitosan/ perlite as raw materials - Google Patents

Abstract

The invention discloses a method for preparing particles by taking chitosan/ perlite as raw materials. The method comprises the following steps of: fully mixing the chitosan and a 4% glacial acetic acid solution in a mixing device in ratio of 1g to 25mg, and continuously stirring for 2h under a 40-50 DEG C water bath environment; then slowly adding the perlite to the mixing device in a mass ratio of the perlite to the chitosan being 2: 1, and continuously stirring for 4h; dropwise adding the mixed solution into a sodium hydroxide solution with the concentration of 0.3mol/L by using a peristaltic pump to form particulate matters; and finally, fully washing the particulate matters by using deionized water till the deionized water for washing is neutral, and drying at 50 DEG C. The particulate materials with stability performance can be formed.

Description

Take chitosan/ perlite as the method that particle prepared by raw material

Technical field

The present invention relates to a kind of method preparing the granulate material of applicable water treatment, particularly relating to a kind of take chitosan/ perlite as the method that particle prepared by raw material.

Background technology

Chitosan is obtained through deacetylation by the chitin extensively existed, chemistry Chitosan (1-4)-2-amino-B-D glucose by name.Chitin is extensively present in the lower plant mushroom of occurring in nature, the cell of algae, the shell of crustacean shrimp, crab, insect, and the cell walls etc. of higher plant, met in engineering at sea-food, and be abandoned as waste.Chitin is second largest organic resource, and therefore, the source of chitosan is quite extensive.

Chitosan has the functional groups such as a large amount of amino, hydroxyl, and these functional groups can play specific effect, can play sufficient effect in processes.But chitosan is generally exist with state that is Powdered or sheet, and character is unstable, easily runs off.

Summary of the invention

The object of this invention is to provide that a kind of what can form the granulate material of stable in properties take chitosan/ perlite as the method that particle prepared by raw material.

The object of the invention is to be achieved through the following technical solutions:

Of the present invention is the method that particle prepared by raw material with chitosan/ perlite, comprises step:

First, be that the glacial acetic acid solution of 4% is fully mixed in stirring and evenly mixing device with the ratio of 1 gram: 25 milliliters by chitosan and concentration, under the water-bath environment that temperature is 40 ~ 50 DEG C, Keep agitation 2h;

Then, slowly join in described stirring and evenly mixing device in its quality and chitosan than the ratio for 2:1 by crossing 100 object perlites, after Keep agitation 4h, it is in the sodium hydroxide solution of 0.3mol/L that this mixing solutions is dropwise added dropwise to concentration through peristaltic pump, forms particulate material;

Finally, by fully clean for described particulate material deionized water, be washed till neutrality, dry at 50 DEG C.

As seen from the above technical solution provided by the invention, what the embodiment of the present invention provided take chitosan/ perlite as the method that particle prepared by raw material, owing to being first that the glacial acetic acid solution of 4% is fully mixed in stirring and evenly mixing device with the ratio of 1 gram: 25 milliliters by chitosan and concentration, under the water-bath environment that temperature is 40 ~ 50 DEG C, Keep agitation 2h; Then perlite is slowly joined in described stirring and evenly mixing device in its quality and chitosan than the ratio for 2:1, after Keep agitation 4h, it is in the sodium hydroxide solution of 0.3mol/L that this mixing solutions is dropwise added dropwise to concentration through peristaltic pump, forms particulate material; Finally by fully clean for described particulate material deionized water, be washed till neutrality, dry at 50 DEG C, the granulate material of stable in properties can be formed.

Accompanying drawing explanation

What Fig. 1 provided for the embodiment of the present invention take chitosan/ perlite as the system layout schematic diagram that the method for particle prepared by raw material.

In figure: 1, water-bath, 2, stirring and evenly mixing device, 3, agitator, 4, peristaltic pump, 5, sodium hydroxide solution, 6, stirrer.

Embodiment

To be described in further detail the embodiment of the present invention below.

Of the present invention take chitosan/ perlite as the method that particle prepared by raw material, its preferably embodiment as shown in Figure 1, comprise step:

First, the glacial acetic acid solution of chitosan and concentration 4% is fully mixed in stirring and evenly mixing device with the ratio of 1 gram: 25 milliliters, under the water-bath environment that temperature is 40 ~ 50 DEG C, preferably 45 DEG C, Keep agitation 2h;

Then, by/perlite slowly joins in described stirring and evenly mixing room in its quality and chitosan than the ratio for 2:1, after Keep agitation 4h, it is in the sodium hydroxide solution of 0.3mol/L that this mixing solutions is dropwise added dropwise to concentration through peristaltic pump, forms particulate material;

Finally, by fully clean for described particulate material deionized water, be washed till neutrality, dry at 50 DEG C.

The concentration of described glacial acetic acid solution is 4%.

Described deacetylating degree of chitosan >=85%, only guaranteed deacetylation, the efficiency of the denseness that guarantee is certain and process.

Described perlite was 100 objects.

The model of described peristaltic pump is Longerpump, BT100-1F, and flow velocity is Peak Flow Rate, mixes material and just can dropwise instill in sodium hydroxide solution quickly and evenly under this flow velocity.

The concentration of described sodium hydroxide solution is 0.3mol/L, and concentration is too high will waste more scavenging solution, and too low the formed pellet hardness of concentration is inadequate.

Perlite is a kind of acidic lava of volcanic eruption, through the glassy rock of quick refrigeration, gains the name because it has pearl fissured structure.Perlite ore deposit comprises perlite, obsidian and pitchstone.The difference of three is that perlite has the arc-shaped crack because condensation is formed, and claims perlitic structure, water content 2 ~ 6%; Pitchstone has unique resinous luster, water content 6 ~ 10%; Obsidian has vitreous luster and conchoidal fracture, and water content is generally less than 2%.China's perlite deposit mainly originates in China mainland diastrophic activity secondary era frequently.The volcano in this generation defines North gets Heilungkiang, and south reaches beach, the South Sea and Hainan Island, long 3000 kilometers, the Volcanic Rock Zone of wide 300 ~ 800 kilometers.Reserves are very abundant.

It is raw material that the present invention adopts with chitosan/ perlite, and the chitosan/ perlite utilizing nature extensively to exist is starting material, utilizes on himself and has numerous functional group, can be formed the granulate material of stable in properties by peristaltic pump instillation.The successful of the water of process heavy metal contamination of the present invention, fluoride pollution.Adopt the inventive method, its pulverous shortcoming can be overcome, particulate material can be prepared quickly.

Specific embodiment 1:

As shown in Figure 1, first be that glacial acetic acid solution is with 1:25(grams per milliliter by the concentration of chitosan and 4%) ratio be fully mixed in (2), fully stir under the water-bath environment that temperature is 40 ~ 50 DEG C, Keep agitation 2h, slowly will join in (2) through 100 object perlite powders (its quality and chitosan are than being 2:1) again, Keep agitation 4h, this mixing solutions is dropwise added dropwise in the sodium hydroxide solution (5) that concentration is 0.3mol/L through peristaltic pump, form particulate material, again by fully clean for this particulate material deionized water, be washed till neutrality, dry at 50 DEG C.

Be used for by the said products removing the solution that fluorinion concentration is 10mg/L, envrionment temperature is 25 DEG C, and pH is 7, and hunting speed is 150rpm, and after reaching balance, fluoride ion removing rate can reach 81%.

Specific embodiment 2:

As shown in Figure 1, first be that the glacial acetic acid solution of 4% is with 1:25(grams per milliliter by chitosan and concentration) ratio be fully mixed in (2), fully stir under the water-bath environment that temperature is 40 ~ 50 DEG C, Keep agitation 2h, slowly will join in (2) through 100 object perlite powders (its quality and chitosan are than being 2:1) again, Keep agitation 4h, this mixing solutions is dropwise added dropwise in the sodium hydroxide solution (5) that concentration is 0.3mol/L through peristaltic pump, form particulate material, again by fully clean for this particulate material deionized water, be washed till neutrality, dry at 50 DEG C.

Be used for by the said products removing the solution that Cu ionic concn is 200mg/L, envrionment temperature is 25 DEG C, and pH is 5, and hunting speed is that 200rpm, 3h can reach balance, and the loading capacity of sorbent material can reach 55.1mg/g.

The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (4)

1. be the method that particle prepared by raw material with chitosan/ perlite, it is characterized in that, comprise step:

First, be that the glacial acetic acid solution of 4% is fully mixed in stirring and evenly mixing device with the ratio of 1 gram: 25 milliliters by chitosan and concentration, under the water-bath environment that temperature is 40 ~ 50 DEG C, Keep agitation 2h;

Then, perlite is slowly joined in described stirring and evenly mixing device in its quality and chitosan than the ratio for 2:1, after Keep agitation 4h, it is in the sodium hydroxide solution of 0.3mol/L that this mixing solutions is dropwise added dropwise to concentration through peristaltic pump, forms particulate material;

Finally, by fully clean for described particulate material deionized water, be washed till neutrality, dry at 50 DEG C;

Described deacetylating degree of chitosan >=85%.

2. according to claim 1 is the method that particle prepared by raw material with chitosan/ perlite, it is characterized in that, described perlite was 100 objects.

3. according to claim 1 is the method that particle prepared by raw material with chitosan/ perlite, it is characterized in that, the temperature of described water-bath is 45 DEG C.

4. according to claim 1 is the method that particle prepared by raw material with chitosan/ perlite, it is characterized in that, the model of described peristaltic pump is Longerpump, BT100-1F, and flow velocity is Peak Flow Rate.