CN1579613A - Composite zeolite drying agent preparation and its production method - Google Patents

Abstract

The invention relates to a compound zeolite desiccant. It uses parastilbite as main material and mixes with kaolin or montmorillonite or meerschaum in clay mineral and amylum graft acrylate or SPA, or amylum graft acrylamide etc. polymers. Their proportion by weight is: 75-85:10-15:5-10. Use them as base materials. Add calcite or coal fines or coal dust of 0-5 percent as pore-forming material. Add soluble glass or epoxy resin of 15-30 percent as agglomerant. Stir evenly and compact by extrusion. Send it into baker to remove moisture. After cooling, throw it into acid or alkali or soduim salt or ammonium salt to conduct performance changing, washing, drying. Or warm again to conduct baking in a high temperature. Finally the production can be obtained. The new zeolite desiccant has merits of good drink performance, simple technics, being able to reuse, no pollution, wide range of application and low price.

Description

The preparation of composite type zeolite drier and production method thereof

(1) technical field:

The present invention relates to the preparation and the production method thereof of a kind of solid sorbent compositions and production method, particularly a kind of composite type zeolite drier.

(2) background technology:

Common drier sorbing material is silica gel, active carbon, 4A synthesis of molecular sieve, activated alumina, calcium chloride etc. both at home and abroad.Their average water absorption rate is ± 30%, though can repeatedly regenerate and regeneration technology simple than other sorbing material, price is expensive.People are eager to seek moderate cost, material that performance is close substitutes.Though zeolite has been the natural minerals sorbing material that is widely used, because the kind of zeolite is too many, and the special structure of each tool, cause zeolite on using, to be subjected to certain restriction.In use just utilized their various particular structure and crystal chemistry character and adsorbablely separate, characteristics such as ion-exchange, catalysis, acidproof, radiation hardness and proportion are little, as water purification agent as the environmental protection aspect, give, in the drainage system as industrial filler, aspect energy project, be used as cation exchange, aquation material, on chemical industry and Petroleum Production, make catalyst, as the cement light aggregate, and agricultural production is as novel antistaling agent and chemical fertilizer filler or the like on building materials industry.Though the people was also once arranged when research drier prescription, considered adding zeolite composition, all be that zeolite is used as auxiliary material.

(3) summary of the invention:

The present invention is to be base material for the public provides a kind of with elite zeolite kind, the material that be equipped with low price, have certain caking property, adsorptivity is strong makes up, and makes the preparation and the production method thereof of water absorption rate height, brand-new composite type zeolite drier nontoxic, free from environmental pollution.

The compound method of neoteric composite type zeolite drier is: with the kaolin in epidesmine and the clay mineral, or montmorillonite, or sepiolite, with with water-absorbing resins, as starch grafted acrylate, or SPA, or starch graft acrylamide, by 75～85: 10～15: 5～10 (are 100 in gross weight) mix as base-material, 0～5% the calcite that adds base-material weight again, coal dust, or flyash is as pore creating material, add again after the waterglass of base-material weight 15～30% or epoxy resin makes binding agent and together evenly mix, extrusion modling, oven dry is after high-temperature baking, or acid or alkali or sodium salt or ammonium salt solution soak and carry out modification and make finished product.

The production craft step of this composite type zeolite drier is:

A, epidesmine and clay mineral is broken respectively, and sieve thick (20～40 order), in (60～120 order), thin (120～200 order) three kinds of granularities, powder that separately will carse, medium and small three kinds of granularities be by weight 100 5～10: 10～15: 75～85 ratios are got and are expected mixing;

B, with epidesmine and the clay mineral selected for use and water-absorbing resins in gross weight be 100 75～85: 10～15: 5～10 ratio mixes as base-material;

C, be 100, add 0～5% pore creating material and 15～30% binding agent and mix extrusion modling in the weight of base-material;

D, that the type piece is sent into baker is dry through 80～260 ℃ of bakings;

E, the type piece of oven dry toasted 1.5～3 hours under 350～550 ℃ of high temperature or be 1～10% hydrochloric acid or sulfuric acid solution in concentration, perhaps concentration is 1～10% NaOH or potassium hydroxide solution, perhaps concentration is to soak cleaning, drying after 2～5 hours in 1～20% sodium salt or the ammonium salt solution, gets product.

Epidesmine is at the distinctive natural minerals in backlands district, China osmanthus, and its reserves big, of high grade (more than 85%), pure, the well-crystallized of quality are tabular, sheet-pile shape output, and aggregate is a pencil, radial, and transparent, translucent, whiteness is near 90%.This zeolite has large aperture, regular microcellular structure and huge inner surface, and stronger water imbibition and significant ion-exchange performance are arranged; Clay minerals such as kaolin, montmorillonite, sepiolite are not only good inorganic mineral binding agent, also have certain absorption property; And, also have very strong water imbibition as water-absorbing resins family macromolecule materials such as starch grafted acrylate, SPA, starch graft acrylamides.Be equipped with a spot of (or not adding) pore creating material again and add the twice-modified compound drier of making in binding agent moulding oven dry back, its water imbibition is good, and renewable (moisture content is removed in oven dry) uses, and repeated use can reach more than 30 times; Its raw material are cheap, and production and regeneration technology are simple, nontoxic pollution-free, and applied range, cost performance height, the utmost point is suitable for protection against the tide, mildew-resistant, the drying of products such as food, medicine, electronics, instrument, gas.

(4) specific embodiments:

In the specific implementation,, can only get wherein a kind of to the kaolin in the clay mineral, montmorillonite, sepiolite, also desirable wherein arbitrarily two or more mixture use simultaneously.

Embodiment one: (is 100 in the base-material gross weight)

Get epidesmine 75, (wherein coarseness is 5, middle granularity is 7.5, fine granularity be 62.5),

Get montmorillonite 15, (wherein coarseness is 0.75, middle granularity is 2.25, fine granularity be 12),

Get starch grafted acrylate 10, mix, add the coal dust of base-material weight 3% and 20% waterglass and evenly mix with epidesmine, montmorillonite, be squeezed into disk shape or ring pie, dry under 120～150 ℃ temperature, again through 500 ℃ of high-temperature bakings 2 hours, cooling gets product naturally;

Embodiment two, (is 100 in the base-material gross weight)

Get epidesmine 80, (wherein coarseness is 4, middle granularity is 8, fine granularity be 68),

Get kaolin 15, (wherein coarseness is 0.75, middle granularity is 1.5, fine granularity be 12.75),

Getting SPA is 5, mix with epidesmine, kaolin, add the calcite of base-material weight 5% and 15% waterglass, be squeezed into spherically or cylindrical after evenly mixing, place 120 ℃ baker oven dry, promptly drop into concentration after the cooling and be in 5% the hydrochloric acid solution, under room temperature state, soaked 2～3 hours, then take out, water cleans up, and dries moisture content again and gets product.

Embodiment three: (is 100 in the base-material gross weight)

Get epidesmine 75, (wherein coarseness is 5, middle granularity is 7.5, fine granularity be 62.5),

Get sepiolite 15, (wherein coarseness is 0.75, middle granularity is 2.25, fine granularity be 12),

Get starch graft acrylamide 10, mix with epidesmine, sepiolite, do not add pore creating material, and even mixing of the epoxy resin that adds base-material weight 25% is squeezed into granular or sheet, be put into 120～150 ℃ the interior oven dry of stove, cooling back is dropped into concentration and is in 20% the sodium salt solution, soaked 3～5 hours at 70～75 ℃ of following constant temperature, takes out the back and cleans with clear water, gets product after the oven dry.

Embodiment four: (is 100 in the base-material gross weight)

Get epidesmine 85 (wherein coarseness is 5, middle granularity is 7.5, fine granularity be 62.5),

Get kaolin 10, (wherein coarseness is 0.8, middle granularity is 1.2, fine granularity be 8),

Get starch-grafted allylamine 5, mix with epidesmine, kaolin, add the flyash of base-material weight 5% and 25% even mixing of epoxy resin be squeezed into granular or sheet, be put into 120～150 ℃ the interior oven dry of stove, cooling back is dropped into concentration and is in 10% the sodium hydroxide solution, soaked 3～5 hours at 90～95 ℃ of following constant temperature, take out the back and clean, get product after the oven dry with clear water.

Claims (2)

1, a kind of compound method of composite type zeolite drier: with in epidesmine and the clay mineral or kaolin, or montmorillonite, or sepiolite, with with water-absorbing resins in or starch grafted acrylate, or SPA, or starch graft acrylamide, by 75～85: 10～15: 5～10 (gross weight is 100) mix as base-material, 0～5% calcite or the coal dust that add base-material weight again, or flyash is as pore creating material, after together evenly mixing as binding agent with the waterglass that adds basal granule weight 15～30% or epoxy resin, extrusion modling, oven dry is after high-temperature baking, or acid or alkali or sodium salt or ammonium salt solution soak modification and make finished product.

2, the production craft step of composite type zeolite drier is:

A, epidesmine and clay mineral is broken respectively, and sieve thick (20～40 order), in (60～120 order), thin (120～200 order) three kinds of granularities, powder that separately will carse, medium and small three kinds of granularities be by weight 100 5～10: 10～15: 75～85 ratios are got and are expected mixing;

B, with epidesmine and the clay mineral selected for use and water-absorbing resins in gross weight be 100 75～85: 10～15: 5～10 ratio mixes makes base-material;

C, be 100, add 0～5% pore creating material and 15～30% binding agent and mix extrusion modling in the weight of base-material;

D, that the type piece is sent into baker is dry through 80～260 ℃ of bakings;

E, the type piece of oven dry toasted 1.5～3 hours under 350～550 ℃ of high temperature or be 1～10% hydrochloric acid or sulfuric acid solution in concentration, perhaps concentration is 1～10% NaOH or potassium hydroxide solution, perhaps concentration is to soak cleaning, drying after 2～5 hours in 1～20% sodium salt or the ammonium salt solution, gets product.