CN104190353A - Modified attapulgite adsorbent for defluorination and preparation method of modified attapulgite adsorbent - Google Patents

Abstract

The invention discloses a modified attapulgite adsorbent for defluorination which is prepared from the following raw materials in parts by weight: 1-2 parts of hyaluronic acid, 1-2 parts of lanthanum nitrate, 1-2 parts of zinc stearate, 3-6 parts of activated carbon, 3-5 parts of trisodium citrate, 1-2 parts of polyvinylpyrrolidone, 1-2 parts of furfural and furfuryl alcohol resins, 2-3 parts of fungacetin, 7-9 parts of sea-foam stone powder, 1-2 parts of TAC, 100-120 parts of attapulgite, a proper amount of water, 5-10 parts of aids and 30-40 parts of 8-10 percent ydrochloric acid solution. According to the invention, lanthanum nitrate and activated carbon are added into the attapulgite, and the adsorption effect for fluorine ions in water is obviously improved; due to addition of the crosslinking agent TAC, lanthanum nitrate is difficult to drop and can be repeatedly used; and moreover, due to the aids in the invention, the dispersity and suspension property of the adsorbent can be improved, and the adsorptive property is increased.

Description

A kind of modified attapulgite earth adsorbing and preparation method thereof for defluorination

Technical field

The invention belongs to attapulgite manufacture field, particularly modified attapulgite earth adsorbing and preparation method thereof for a kind of defluorination.

Background technology

Attapulgite is a kind of crystalloid hydrous magnesium aluminium silicate mineral, has unique layer chain structure feature, in its structure, has crystal lattice, Na+, the Ca2+, Fe3+, the Al3+ that in side crystal, contain non-quantitative, and crystal is needle-like, fibrous or fiber collection shape.Attapulgite has unique dispersion, high temperature resistant, the anti-good colloidal nature such as saline and alkaline and higher adsorption bleaching ability.And there is certain plasticity and cohesive force, and water imbibition is strong, tool viscosity and plasticity when wet, and dry after-contraction is little, not quite aobvious crackle, water soaking collapses loose, and suspension is met not flocculation sediment of dielectric.Therefore attapulgite is widely used in the numerous areas such as sewage disposal, adsorption cleaning, washing agent, rubber, coating, papermaking, light industry, agricultural, cosmetics, is a kind of important nonmetallic minerals.

Along with industrial expansion, water pollutes very serious, fluorine ion is very serious to the pollution of water quality, health has been caused to great threat, conventionally the attapulgite adsorbent of use is limited to the suction-operated of fluorine ion, need to carry out modification to it, further to improve the absorption property to fluorine ion.

Summary of the invention

The object of the present invention is to provide a kind of defluorination modified attapulgite earth adsorbing and preparation method thereof, the advantages of good adsorption effect of this attapulgite to fluorine ion in water, can Reusability, dispersed, suspension is good.

Technical scheme of the present invention is as follows:

A kind of defluorination modified attapulgite earth adsorbing, is characterized in that being made up of the raw material of following weight portion: hyaluronic acid 1-2, lanthanum nitrate 1-2, zinc stearate 1-2, active carbon 3-6, trisodium citrate 3-5, polyvinylpyrrolidone 1-2, furfural furfuryl alcohol resin 1-2, triacetin 2-3, sepiolite powder 7-9, crosslinking agent TAC 1-2, attapulgite 100-120, water in right amount, auxiliary agent 5-10,8-10% hydrochloric acid solution 30-40;

Described auxiliary agent is made up of the raw material of following weight portion: isobutyl palmitate 0.2-0.3, Porasil 2-3, polyurethane resin 0.4-0.6, ethylene glycol 3-5, vitamin E 0.3-0.4, activated alumina 0.3-0.5, linolenic acid 0.2-0.3, sodium lignin sulfonate 0.3-0.4, pearl powder 1-1.5, bamboo fibre 0.2-0.3, epsom salt 0.1-0.2, charcoal powder 2-3, butanedioic acid 0.2-0.3, double stearic acid aluminium 0.2-0.4, medical stone powder 3-5, silane coupler KH-5721-2; Preparation method is: Porasil, pearl powder, charcoal powder, medical stone powder, silane coupler KH-572 mixed grinding is even, obtain mixed-powder; By other residual components mixing and stirring, with gained powder mixed grinding 20-30 minute, then be heated to 60-70 DEG C again, griding reaction 30-40 minute, to obtain final product.

The preparation method of modified attapulgite earth adsorbing for described defluorination, is characterized in that comprising the following steps:

(1) attapulgite, sepiolite powder are sent into calcining furnace, at 300-400 DEG C, calcine 3-4 hour, take out and pulverize, cross 20 mesh sieves, add in the water of 340-360 weight portion, under 100-200 rev/min, stir 10-12 hour, obtain attapulgite suspension, add 8-10% hydrochloric acid solution, be heated to 50-60 DEG C, stir 1-2 hour, then add while stirring trisodium citrate to continue to stir 1-2 hour, filter, being washed to pH value is 6-8, refilter, dry, obtain activating attapulgite powder;

(2) other residual components are added in residue water, stir, obtain slurry;

(3) blow the hot-air of 50-60 DEG C to attapulgite powder it is seethed, then spray into the slurry that (2) vaporific step obtains in the powder seething, after the two is fully mixed, maintenance temperature is 50-60 DEG C, continues to seethe 30-40 minute;

(4) mixed material (3) step being obtained is dried, and grinds to form the particle of 5-80 μ m, to obtain final product.

Beneficial effect of the present invention

Attapulgite of the present invention has added lanthanum nitrate, active carbon, and the adsorption effect of fluorine ion in water is significantly improved; By adding crosslinking agent TAC, make lanthanum nitrate difficult drop-off, can Reusability; The application of the invention auxiliary agent, can increase dispersiveness, the suspension of adsorbent, increases absorption property.

Detailed description of the invention

A kind of defluorination modified attapulgite earth adsorbing, by following weight portion (kilogram) raw material make: hyaluronic acid 1.5, lanthanum nitrate 1.5, zinc stearate 1.5, active carbon 4, trisodium citrate 4, polyvinylpyrrolidone 1.5, furfural furfuryl alcohol resin 1.5, triacetin 2.5, sepiolite powder 8, crosslinking agent TAC 1.5, attapulgite 110, water in right amount, auxiliary agent 7,9% hydrochloric acid solution 35;

Described auxiliary agent by following weight portion (kilogram) raw material make: isobutyl palmitate 0.2, Porasil 2.5, polyurethane resin 0.5, ethylene glycol 4, vitamin E 0.4, activated alumina 0.4, linolenic acid 0.3, sodium lignin sulfonate 0.4, pearl powder 1.3, bamboo fibre 0.2, epsom salt 0.2, charcoal powder 2.5, butanedioic acid 0.2, double stearic acid aluminium 0.3, medical stone powder 4, silane coupler KH-5721.5; Preparation method is: Porasil, pearl powder, charcoal powder, medical stone powder, silane coupler KH-572 mixed grinding is even, obtain mixed-powder; Again by other residual components mixing and stirring, with gained powder

End mixed grinding 25 minutes, then be heated to 65 DEG C, griding reaction 35 minutes, to obtain final product.

The preparation method of modified attapulgite earth adsorbing for described defluorination, comprises the following steps:

(1) attapulgite, sepiolite powder are sent into calcining furnace, at 350 DEG C, calcine 3.5 hours, take out and pulverize, cross 20 mesh sieves, add in the water of 350 weight portions, under 150 revs/min, stir 11 hours, obtain attapulgite suspension, add 9% hydrochloric acid solution, be heated to 55 DEG C, stir 1.5 hours, then add while stirring trisodium citrate to continue to stir 1.5 hours, filter, being washed to pH value is 6, refilter, dry, obtain activating attapulgite powder;

(2) other residual components are added in residue water, stir, obtain slurry;

(3) blow the hot-air of 55 DEG C to attapulgite powder it is seethed, then spray into the slurry that (2) vaporific step obtains in the powder seething, after the two is fully mixed, keeping temperature is 55 DEG C, continues to seethe 35 minutes;

(4) mixed material (3) step being obtained is dried, and grinds to form the particle of 5-80 μ m, to obtain final product.

Experimental data:

The attapulgite modified specific area of the present embodiment is 292 ㎡/g, is added to the water by 4%, and tested viscosity is 11252.2mPa.s, dissolution time≤5min.Be 75% to fluorine containing waste water removal efficiency of flouride.As can be seen from the above data, the excellent adsorption of this attapulgite, goes fluorine efficiency high.

Claims (2)

1. a defluorination modified attapulgite earth adsorbing, is characterized in that being made up of the raw material of following weight portion: hyaluronic acid 1-2, lanthanum nitrate 1-2, zinc stearate 1-2, active carbon 3-6, trisodium citrate 3-5, polyvinylpyrrolidone 1-2, furfural furfuryl alcohol resin 1-2, triacetin 2-3, sepiolite powder 7-9, crosslinking agent TAC 1-2, attapulgite 100-120, water are appropriate, auxiliary agent 5-10,8-10% hydrochloric acid solution 30-40;

Described auxiliary agent is made up of the raw material of following weight portion: isobutyl palmitate 0.2-0.3, Porasil 2-3, polyurethane resin 0.4-0.6, ethylene glycol 3-5, vitamin E 0.3-0.4, activated alumina 0.3-0.5, linolenic acid 0.2-0.3, sodium lignin sulfonate 0.3-0.4, pearl powder 1-1.5, bamboo fibre 0.2-0.3, epsom salt 0.1-0.2, charcoal powder 2-3, butanedioic acid 0.2-0.3, double stearic acid aluminium 0.2-0.4, medical stone powder 3-5, silane coupler KH-5721-2; Preparation method is: Porasil, pearl powder, charcoal powder, medical stone powder, silane coupler KH-572 mixed grinding is even, obtain mixed-powder; By other residual components mixing and stirring, with gained powder mixed grinding 20-30 minute, then be heated to 60-70 DEG C again, griding reaction 30-40 minute, to obtain final product.

2. the preparation method of modified attapulgite earth adsorbing for defluorination according to claim 1, is characterized in that comprising the following steps:

(1) attapulgite, sepiolite powder are sent into calcining furnace, at 300-400 DEG C, calcine 3-4 hour, take out and pulverize, cross 20 mesh sieves, add in the water of 340-360 weight portion, under 100-200 rev/min, stir 10-12 hour, obtain attapulgite suspension, add 8-10% hydrochloric acid solution, be heated to 50-60 DEG C, stir 1-2 hour, then add while stirring trisodium citrate to continue to stir 1-2 hour, filter, being washed to pH value is 6-8, refilter, dry, obtain activating attapulgite powder;

(2) other residual components are added in residue water, stir, obtain slurry;

(3) blow the hot-air of 50-60 DEG C to attapulgite powder it is seethed, then spray into the slurry that (2) vaporific step obtains in the powder seething, after the two is fully mixed, maintenance temperature is 50-60 DEG C, continues to seethe 30-40 minute;

(4) mixed material (3) step being obtained is dried, and grinds to form the particle of 5-80 μ m, to obtain final product.