CN1219581C - High-temp solid dechlorinating agent and its preparing process - Google Patents
High-temp solid dechlorinating agent and its preparing process Download PDFInfo
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Abstract
The present invention relates to a high temperature solid dechlorinating agent and a preparation method thereof. The solid dechlorinating agent is especially suitable for removing hydrogen chloride in a high temperature gaseous medium. A solid whole is formed from active components, wherein the active components are calcium hydroxide, or the calcium hydroxide and calcium carbonate, or sodium carbonate and the calcium carbonate. The solid dechlorinating agent has the preparation method that powdery calcium hydroxide is put in a kneader and is uniformly mixed after water is added, and a forming machine is used for shaping; then the calcium hydroxide is placed in the air for 1 to 3 days for airing and is placed in an oven for baking to obtain a finished product, and a dried finished product can be soaked by ammonium bicarbonate to improve strength. The content of the active components of the dechlorinating agent is high. The high temperature solid dechlorinating agent and the preparation method thereof is mainly used for removing hydrogen chloride in natural gas, naphtha, synthetic ammonia raw gas, hydrogen gas and the like at high temperature.
Description
Technical field
The present invention relates to a kind of solid dechlorinating agent and preparation method thereof, this solid dechlorinating agent is mainly used in and removes hydrogen chloride in gas such as natural gas, naphtha, syngas for synthetic ammonia, hydrogen in the high-temperature gas medium.
Background technology
Existing antichlor adopts infusion process, and the active component alkali metal compound is steeped in the micropore of the alumina catalyst support of porous spherical or bar shaped or active carbon.This antichlor is limit because of the voidage of carrier, and the active component that stain is gone into is lower, and therefore when dechlorination is used, its chlorosity amount is below 20%, and higher because of the cost of carrier, makes that the cost of antichlor is also higher.As its improvement, Chinese patent application 92107333.X discloses a kind of antichlor, it is active component that this antichlor adopts alkali metal compound or alkaline earth metal compound, with the natural inorganic compound is binding agent, add the direct batch mixing moulding of suitable quantity of water, obtain finished product at the roasting temperature that is no more than 350 ℃ again.This antichlor is with the inorganic clay replacement vector, and directly batch mixing moulding is improved active principle content, and in embodiment, the chlorosity amount reaches 35.2%, and cost is also lower.But the active principle content of this antichlor is high not enough, so cause the chlorosity amount of antichlor not high enough.Chinese patent application 94106413.1 discloses a kind of preparation method of chloride absorbent, the related adsorbent of this method is main component or whole component with the inorganic calcium compound, when the adsorbent moulding, the mixture that adds small amounts of inorganic binding agent or organic binder bond or inorganic binder and organic binder bond, can add organic extrusion aid in addition, because organic binder bond is burnt after roasting, so its inorganic calcium compounds content is 80～100m%, the content of inorganic binder is 20～0m%.The inorganic calcium compound that this adsorbent adopted is calcium oxide or calcium hydroxide; Its manufacture method is: with raw material components such as calcium hydroxide (or calcium oxide), binding agent, water through the bar moulding of overmulling pinching or with spin, pressed disc method moulding, and then through promptly making the finished product adsorbent after oven dry, the roasting; Drying condition after the moulding is for to dry under 110～130 ℃ temperature 2～4 hours, and its roasting condition is 400～800 ℃ roasting temperature 4～6 hours.Under 400～800 ℃ through 4～6 hours roasting after, the crystal grain of calcium hydroxide or calcium oxide is bigger, and the activity of adsorbent is reduced, calcium hydroxide or the calcium oxide of this moment are active ingredient, rather than active component, when so this adsorbent uses the concentration of its exit gas hydrogen chloride higher (＜1ppm), and adsorption effect is also undesirable.Chinese patent application 97116288 discloses a kind of antichlor and preparation method thereof.In fact this antichlor is active ingredient with sodium carbonate, calcium carbonate or magnesia, is carrier with inorganic clay or bentonite, kaolin or diatomite, and adds inorganic binder, and adds organic or macromolecular compound.Its preparation method is: mentioned component is carried out mixed grind, the moulding of agent bar, air-dry back in 100～120 ℃ of oven dry 2 hours, 350～400 ℃ of following roastings 1～3 hour.Through 350～400 ℃ of roastings 1～3 hour, most of active ingredient of this antichlor has not been active component, but because its sintering temperature is low than 94106413.1, so the concentration of its exit gas hydrogen chloride was＜0.1ppm and dechlorination effect is better when this antichlor used, but penetrated chlorosity lower (30wt%).
Summary of the invention
The objective of the invention is, provide that a kind of active principle content is higher, dechlorination effect better, penetrate higher and the high-temp solid dechlorinating agent that production cost is lower and preparation method thereof of Sulfur capacity.
Realize that the technical scheme that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is: all is made up of active principle, this antichlor is to add water or block calcium oxide by powdery calcium hydroxide to add water and mixedly pinch even aftershaping, dry after drying and the solid forming thing that obtains again; Or by powdery calcium hydroxide add water or block calcium oxide add water mix pinch evenly, add again mix behind the powdery precipitated calcium carbonate pinch even aftershaping, dry after the solid forming thing that obtains of oven dry again; Or by paste sodium acid carbonate and precipitated calcium carbonate mix pinch even aftershaping, dry after the solid forming thing that obtains of roasting again, paste sodium acid carbonate wherein adds the water back that stirs by powdery carbonic hydroammonium and powdery sodium carbonate and places, stirs the back again and place, obtain after reacting completely.
Above-mentioned active principle is preferably calcium hydroxide; Or be preferably calcium hydroxide and calcium carbonate, and in the active principle, the weight content of calcium hydroxide is 20%～99%, weight of calcium carbonate content is 1%～80%; Or be preferably sodium carbonate and calcium carbonate, and in the active principle, the weight content of sodium carbonate is 10%～40%, the weight content of calcium carbonate is 60%～90%.
The technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: powdery calcium hydroxide is put into kneader add to mix behind the water and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery calcium hydroxide and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery precipitated calcium carbonate and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: powdery calcium hydroxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery precipitated calcium carbonate and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
Among the above-mentioned preparation method, after article shaped was dried, it was after 10%～30% ammonium bicarbonate soln soaks 4 hours to 4 days, rinsing, to dry that article shaped is put into percentage concentration again.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: 1. powdery carbonic hydroammonium, powdery sodium carbonate and water are put into mixer and stir, place a period of time, stir again, place again, stir again, leave standstill, until reacting completely, obtain paste product sodium acid carbonate; 2. paste product, powdery precipitated calcium carbonate are put into kneader and mixed and to pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, obtain finished product after the roasting.
The another kind of technical scheme that realizes the preparation method that a kind of high-temp solid dechlorinating agent is provided in the object of the invention is, this preparation method has following steps: 1. powdery carbonic hydroammonium, powdery sodium carbonate and water are put into mixer and stir, place a period of time, stir again, place again, stir again, leave standstill, until reacting completely, obtain paste product sodium acid carbonate; 2. stir after adding water in being placed with the container of calcium oxide, add powdery carbonic hydroammonium in the stirring, obtain calcium carbonate serosity, washing is filtered, and obtains calcium carbonate powder after the roasting; 3. paste sodium acid carbonate and calcium carbonate powder are put into kneader and mixed and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, obtain finished product after the roasting.
The present invention has positive effect: (1) antichlor of the present invention all is made up of active principle and water and is dried, can be so penetrate chlorosity up to 50%～70%, thus make the service life of antichlor longer.(2) antichlor that obtains by preparation method of the present invention, its active principle active higher further improved and penetrated chlorosity.(3) active principle is the mixture of calcium hydroxide or calcium hydroxide and calcium carbonate in the antichlor of the present invention, and its cost is lower.(4) after the step that has increased the ammonium bicarbonate soln immersion in the preparation process of the present invention, the compression strength of antichlor is improved.(5) be particularly suitable under the condition of high temperature, in 200 ℃～400 ℃ scope, even under higher temperature, in gaseous medium, remove hydrogen chloride.
The specific embodiment
(embodiment 1)
After 10 kilograms in powdery calcium hydroxide is put into kneader and added 4 kilograms in water, start kneader and mix to pinch evenly and become the reactive hydrogen calcium oxide, be used as the banded extruder extrusion of make-up machine, the extrusion diameter is 4.7 millimeters, after in air, drying in 3 days, semi-finished product.Semi-finished product are put into baking oven 130 ℃ of oven dry down, obtain finished product A, its side pressure strength is 53N/cm.
(embodiment 2)
700 gram carbonic hydroammonium are poured in 2000 ml waters, stirred, make it abundant dissolving, make supersaturated solution; Semi-finished product 400 grams that dry with gained among the embodiment 1 drop into wherein again, are interrupted and stir for several times; Left standstill 3 days, and took out bar, use the running water rinsing; 130 ℃ of oven dry down, obtain finished product B, its side pressure strength is 90N/cm.
(embodiment 3)
1.5 kilograms in block calcium oxide is put into container add 2 kilograms in water, stir; Place and add 0.2 kg of hydrogen calcium oxide two days later, mixed pinching evenly; Be used as the banded extruder extrusion of make-up machine, the extrusion diameter is 4.7 millimeters, places in air and dries in 3 days, puts into baking oven 130 ℃ of oven dry down, obtains finished product C, and its side pressure strength is 50N/cm.
(embodiment 4)
560 gram carbonic hydroammonium are poured in 2000 ml waters, stirred, make it abundant dissolving; Semi-finished product 500 grams that dry with gained among the embodiment 3 drop into wherein again, are interrupted and stir for several times, leave standstill 24 hours, take out bar, use the running water rinsing; 130 ℃ of oven dry down, obtain finished product D, its side pressure strength is 72N/cm.
(embodiment 5)
950 gram carbonic hydroammonium are poured in 2000 ml waters, stirred, make it abundant dissolving, again gained among the embodiment 3 must be dried semi-finished product 630 grams and drop into wherein, be interrupted and stir for several times; Left standstill 4 days, and took out bar, use the running water rinsing; 130 ℃ of oven dry down, obtain finished product E, its side pressure strength is 120N/cm.
(embodiment 6)
The block calcium oxide of 1000 grams is added 1200 milliliters in water, stir, placed 2 days; Mix and to pinch evenly, use the banded extruder extrusion, obtain diameter and be 4.7 millimeters strip article shaped; Placement obtained semi-finished product after drying in 3 days in air.Semi-finished product 80 ℃ of oven dry down, are got finished product F.
(embodiment 7)
40 gram carbonic hydroammonium are poured in 200 ml waters, stirred, make it abundant dissolving, obtain percentage concentration and be 20% ammonium bicarbonate soln; With gained among the embodiment 6 semi-finished product 30 gram that dries drop into wherein, be interrupted and stir gently for several times, leave standstill 24 hours after, take out bar, use the running water rinsing, 130 ℃ of oven dry down, get finished product G.
(embodiment 8)
The block calcium oxide of 60 grams is added 140 milliliters in water, stir, placed 2 days.Add 148 gram precipitated calcium carbonates again, mediate evenly, mixture is put into the banded extruder moulding, obtain diameter and be 3 millimeters strip article shaped.The strip article shaped was placed in air 3 days, obtain drying semi-finished product.Semi-finished product 80 ℃ of oven dry down, are obtained finished product H.
(embodiment 9)
In percentage concentration is 400 milliliters of 20% ammonium bicarbonate solns, put into the semi-finished product that dry of embodiment 8 gained, be interrupted and stir gently for several times, leave standstill 24 hours after, take out bar, use the running water rinsing.130 ℃ of oven dry down, obtain finished product I.
(embodiment 10)
1000 gram powdery calcium hydroxides are added water 440 grams mediate evenly, obtain the reactive hydrogen calcium oxide; Add 160 gram precipitated calcium carbonates again and mediate evenly, obtain the mixture of reactive hydrogen calcium oxide and calcium carbonate activated.Mixture is put into the banded extruder moulding, obtain diameter and be 4.7 millimeters strip article shaped; The strip article shaped was placed in air 3 days, obtain drying semi-finished product.Semi-finished product 80 ℃ of oven dry down, are obtained finished product J.
(embodiment 11)
That puts into embodiment 10 gained in percentage concentration is 400 milliliters of 10% ammonium bicarbonate solns dries semi-finished product 30 grams, is interrupted and stirs gently for several times, leave standstill 24 hours after, take out bar, use the running water rinsing; Put into baking oven,, obtain finished product K 130 ℃ of oven dry down.
(embodiment 12)
33.8 gram powdery carbonic hydroammonium are added 50 ml waters, under stirring, slowly add 43.1 gram powdery sodium carbonate, after stirring, sealing is spent the night; Stir, sealing is spent the night again again; Stir, sealing and standing added 102.6 gram precipitated calcium carbonates after 7 days, mixed and pinched the mixture that evenly obtains sodium acid carbonate and calcium carbonate again.With the mixture moulding, obtain diameter and be 3 millimeters bar with banded extruder.Place air to dry in 3 days bar and obtain drying semi-finished product.Semi-finished product are obtained finished product L 500 ℃ of following roastings, and its side pressure strength is 73N/cm.
(embodiment 13)
1. add 5.8 liters in water in 5.92 kilograms powdery carbonic hydroammonium, slowly add 7.57 kilograms of powdery sodium carbonate under stirring, after stirring, sealing is spent the night; Stir, sealing is spent the night again again; Stir, sealing and standing 7 days obtains the paste sodium acid carbonate again.2. in 5 kilograms of block calcium oxide, add 29 liters in water, stir, obtain calcium hydroxide slurry, standing over night; Adding 7 kilograms of carbonic hydroammonium reacts; Product removes residue through the worry of 80 mesh sieves, filters to such an extent that consider cake through filter centrifugal again, 140 ℃ of oven dry down, obtains powder lime carbonate.3. above-mentioned paste sodium acid carbonate and powder lime carbonate are put into kneader and mediated evenly, mixture is put into the banded extruder moulding, obtain diameter and be 3 millimeters bar, in air, dried 3 days, obtain drying semi-finished product; Semi-finished product 600 ℃ of following roastings, are obtained product M, and its side pressure strength is 81N/cm.
(test example 1 to 6)
Finished product B, the D, L, the M that get in the foregoing description carry out the dechlorination performance test respectively.Relevant experimental condition is as follows: dechlorination reaction bore Φ 10mm, antichlor granularity 20～30 orders, loading amount 4ml.Unstripped gas is the N2 gas that contains HCl gas.Test pressure is a normal pressure.When reaction tube outlet HCl concentration reaches 1ppm then for penetrating.
The antichlor result of the test is as follows:
Test dechlorination temperature air speed h
-1Unstripped gas HCl exit gas HCl penetrates chlorosity
Example agent ℃ concentration ppm concentration ppm wt%
1 B 350 3000 2000 ＜0.1 69.0
2 B 300 3000 2000 ＜0.1 57.3
3 B 250 3000 2000 ＜0.1 43.7
4 D 350 3000 2000 ＜0.1 70.1
5 L 350 2500 2000 ＜0.1 51.0
6 M 350 2500 2000 ＜0.1 55.0
Claims (12)
1, a kind of high-temp solid dechlorinating agent is characterized in that: all be made up of active principle, this antichlor is to add water or block calcium oxide by powdery calcium hydroxide to add water and mix and pinch even aftershaping, dry after drying and the solid forming thing that obtains again; Or by powdery calcium hydroxide add water or block calcium oxide add water mix pinch evenly, add again mix behind the powdery precipitated calcium carbonate pinch even aftershaping, dry after the solid forming thing that obtains of oven dry again; Or by paste sodium acid carbonate and precipitated calcium carbonate mix pinch even aftershaping, dry after the solid forming thing that obtains of roasting again, paste sodium acid carbonate wherein adds the water back that stirs by powdery carbonic hydroammonium and powdery sodium carbonate and places, stirs the back again and place, obtain after reacting completely.
2, high-temp solid dechlorinating agent according to claim 1 is characterized in that: active principle is a calcium hydroxide.
3, high-temp solid dechlorinating agent according to claim 1 is characterized in that: active principle is calcium hydroxide and calcium carbonate; In the active principle, the weight content of calcium hydroxide is 20%～99%, and weight of calcium carbonate content is 1%～80%.
4, high-temp solid dechlorinating agent according to claim 1 is characterized in that: active principle is sodium carbonate and calcium carbonate; In the active principle, the weight content of sodium carbonate is 10%～40%, and the weight content of calcium carbonate is 60%～90%.
5, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: powdery calcium hydroxide is put into kneader add to mix behind the water and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
6, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
7, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery calcium hydroxide and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
8, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: block calcium oxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery precipitated calcium carbonate and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
9, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: powdery calcium hydroxide is put into kneader add to mix behind the water and pinch evenly, add again to mix behind the powdery precipitated calcium carbonate and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, put into baking oven 80 ℃ to 130 ℃ oven dry down, obtain finished product.
10, according to the preparation method of the described high-temp solid dechlorinating agent of one of claim 5 to 9, it is characterized in that: after article shaped is dried, it is after 10%～30% ammonium bicarbonate soln soaks 4 hours to 4 days, rinsing, to dry that article shaped is put into percentage concentration again.
11, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: 1. powdery carbonic hydroammonium, powdery sodium carbonate and water are put into mixer and stir, place a period of time, stir again, place again, stir again, leave standstill, until reacting completely, obtain paste product sodium acid carbonate; 2. paste product, powdery precipitated calcium carbonate are put into kneader and mixed and to pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, obtain finished product after the roasting.
12, the preparation method of high-temp solid dechlorinating agent according to claim 1, have following steps: 1. powdery carbonic hydroammonium, powdery sodium carbonate and water are put into mixer and stir, place a period of time, stir again, place again, stir again, leave standstill, until reacting completely, obtain paste product sodium acid carbonate; 2. stir after adding water in being placed with the container of calcium oxide, add powdery carbonic hydroammonium in the stirring, obtain calcium carbonate serosity, washing is filtered, and obtains calcium carbonate powder after the roasting; 3. above-mentioned paste sodium acid carbonate and calcium carbonate powder are put into kneader and mixed and pinch evenly, use the make-up machine moulding, in air, place and dried in 1～3 day, obtain finished product after the roasting.
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| CN 00130377 CN1219581C (en) | 2000-11-06 | 2000-11-06 | High-temp solid dechlorinating agent and its preparing process |
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| IT202000014629A1 (en) | 2020-06-18 | 2021-12-18 | Eni Spa | COMPOSITION OF PLASTIC MATERIAL AND PROCEDURE FOR THE TREATMENT OF PLASTIC MATERIALS TO FORM SUCH COMPOSITION. |
| IT202100031964A1 (en) | 2021-12-21 | 2023-06-21 | Eni Spa | PROCEDURE FOR THE TREATMENT OF RECYCLED PLASTICS. |
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| CN101269294B (en) * | 2008-05-20 | 2013-09-11 | 北京三聚环保新材料股份有限公司 | Zincium-calcium dechlorinating agent at normal temperature and preparing method thereof |
| TWI544067B (en) | 2011-05-27 | 2016-08-01 | China Petrochemical Technology Co Ltd | A Method for Catalytic Recombination of Naphtha |
| CN110624382A (en) * | 2018-06-25 | 2019-12-31 | 沈阳三聚凯特催化剂有限公司 | High-temperature flue gas dechlorinating agent and preparation method thereof |
| CN109181748A (en) * | 2018-08-07 | 2019-01-11 | 黑龙江莱睿普思环境科技发展有限公司 | High-temperature dechlorinating agent and preparation method thereof |
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| CN109847569B (en) * | 2019-03-28 | 2021-04-30 | 西安元创化工科技股份有限公司 | Preparation method of high-temperature gas-phase dechlorinating agent |
| CN114653192B (en) * | 2020-12-23 | 2024-06-18 | 沈阳三聚凯特催化剂有限公司 | High-temperature gas-phase dechlorinating agent and preparation method thereof |
| CN112973414B (en) * | 2021-02-04 | 2022-06-28 | 西安元创化工科技股份有限公司 | High-temperature gas-phase dechlorinating agent composition and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202000014629A1 (en) | 2020-06-18 | 2021-12-18 | Eni Spa | COMPOSITION OF PLASTIC MATERIAL AND PROCEDURE FOR THE TREATMENT OF PLASTIC MATERIALS TO FORM SUCH COMPOSITION. |
| IT202100031964A1 (en) | 2021-12-21 | 2023-06-21 | Eni Spa | PROCEDURE FOR THE TREATMENT OF RECYCLED PLASTICS. |
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