CN105214448A - Absorbing liquid of a kind of applying modified starch process industrial organic exhaust gas and preparation method thereof - Google Patents
Absorbing liquid of a kind of applying modified starch process industrial organic exhaust gas and preparation method thereof Download PDFInfo
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- CN105214448A CN105214448A CN201510644695.1A CN201510644695A CN105214448A CN 105214448 A CN105214448 A CN 105214448A CN 201510644695 A CN201510644695 A CN 201510644695A CN 105214448 A CN105214448 A CN 105214448A
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Abstract
The present invention relates to a kind of absorbing liquid for applying modified starch process industrial organic exhaust gas and preparation method thereof, the raw material of this absorbing liquid has the features such as easy degraded, low price, and make it have cooperative effect by using special proportioning, substantially increase its absorptivity to organic exhaust gas, effectively remove benzene series organic exhaust gas.
Description
Technical field
The present invention relates to a kind of waste gas absorption liquid, particularly a kind of absorbing liquid of applying modified starch process industrial organic exhaust gas.
The invention still further relates to the preparation method of above-mentioned absorbing liquid.
Background technology
Toluene, dimethylbenzene, benzene, be industrially commonly called as " triphen ", is widely used in fuel, agricultural chemicals, production of flavor, makes paint, pharmacy, the industries such as Furniture manufacture as industrial chemicals or solvent.In recent years along with the development of electronics industry, machinery, automobile making, printing, shoemaking, coatings industry, application toluene, benzene etc. get more and more as the occasion of solvent, thus cause and volatilize a large amount of gas benzene in air.Therefore waste gas containing benzene is also day by day serious for the pollution of air.They are poisonous organic compound, and leukaemia is the modal malignant tumour relevant with benzene poisoning, and toluene poisoning main manifestations is the impression to nervous centralis, and dimethylbenzene toxicity major effect renal function, embryo or reproductive system.
Processing method for " triphen " generally have combustion method, active carbon adsorption,
Combustion method not easily processes large quantity of exhaust gas, and complicated operation has certain danger.After active carbon adsorption adsorbs certain waste gas, adsorption capacity can decline, and needs the activated carbon that more renews or to its regeneration process, be therefore only applicable to the waste gas that low concentration, tolerance are little, and continuation is not high, easy secondary pollution.
At Chinese patent 200710032770.4, a kind of method of waste gas containing benzene liquid-spraying purified liquid process waste gas is proposed in 201410447382.2 and 201110150485.9, although said method is simple to operate, cost is low, effect stability, but its purifying rate need further raising, and when it using halogen-containing material, if improper use, easily cause the pollution to environment.
Summary of the invention
The present invention completes to solve above-mentioned deficiency of the prior art, the object of this invention is to provide a kind of absorbing liquid of applying modified starch process industrial organic exhaust gas, the cooperative effect of several material of this absorbing liquid, effectively improve the assimilation effect of " triphen " waste gas, and its configuration simple, with low cost, effectively overcome deficiency of the prior art.
Technical scheme of the present invention is as described below:
1, for an absorbing liquid for applying modified starch process industrial organic exhaust gas, it is characterized in that being made up of following raw material by weight:
About 80-110 part water, 2-12 part potash, 1-5 sodium acetate, 2-8 part propene carbonate, 2-8 part ethanol, 1-10 part neopelex, 2-4 part dimethyl silicone polymer, 5-15 part modified starch, 2-4 part modified sodium lignosulfonate.
2, the absorbing liquid according to 1, is characterized in that the preparation method of described modified starch is: 1) making concentration of slurry with cornstarch and water is that the ative starch of about 20-28wt% is starched;
2) to step 1) 100 weight portion ative starch slurry add sodium sulfite 10 weight portion stir 15-25 minute, then add hydrochloric acid regulate slurry pH value 2.0 ~ 3.0, be heated to about 45 ~ 50 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5-15 weight portion, reaction 15-25 minute, then hydro-oxidation sodium agent adjust ph 10.5 ~ 11.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 ~ 55 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 ~ 30 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
Present invention also offers above-mentioned 1, the preparation method of the absorbing liquid of 2, is characterized in that:
1) making concentration of slurry with cornstarch and water is that the ative starch of 20-28wt% is starched;
2) to step 1) 100 weight portion ative starch slurry add sodium sulfite 10 weight portion stir 15-25 minute, then add hydrochloric acid regulate slurry pH value 2.0 ~ 3.0, be heated to 45 ~ 50 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5-15 weight portion, reaction 15-25 minute, then hydro-oxidation sodium agent adjust ph 10.5 ~ 11.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 ~ 55 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 ~ 30 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
6) modified starch 5-15 part that step 5) obtains is got, joined in 80-110 part water, then add 2-12 part potash successively, 1-5 sodium acetate, 2-8 part propene carbonate was 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 2-8 part ethanol is added, 1-10 part neopelex improves temperature to 40 degrees Celsius of Keep agitation 1 hour, then adds 2-4 part dimethyl silicone polymer, 2-4 part modified sodium lignosulfonate, stir 30 minutes, mix and obtain finished product.
Detailed description of the invention
Below in conjunction with embodiment and comparative example, the present invention is described in detail, and following embodiment is only used for the detailed explanation to description, not as restriction of the present invention.
Embodiment 1
1) making concentration of slurry with cornstarch and water is that the ative starch of 20wt% is starched;
2) to step 1) 100 weight portion ative starch slurries add sodium sulfite 10 weight portion and stir 15 minutes, then add hydrochloric acid and regulate slurry pH value 2.0, be heated to 45, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5 weight portion, react 15 minutes, then hydro-oxidation sodium agent adjust ph 10.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
6) modified starch 5 parts that step 5) obtains is got, joined in 80 parts of water, then add 2 parts of potash successively, 1 sodium acetate, 2 parts of propene carbonates were 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 2 parts of ethanol are added, 1 part of neopelex improves temperature to 40 degrees Celsius of Keep agitation 1 hour, then adds 2 parts of dimethyl silicone polymers, 2 parts of modified sodium lignosulfonates, stir 30 minutes, mix and obtain finished product.
Embodiment 2
1) making concentration of slurry with cornstarch and water is that the ative starch of 25wt% is starched;
2) to step 1) 100 weight portion ative starch slurries add sodium sulfite 10 weight portion and stir 20 minutes, then add hydrochloric acid and regulate slurry pH value 2.5, be heated to 48 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 10 weight portion, react 20 minutes, then hydro-oxidation sodium agent adjust ph 11;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 50 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 28 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
6) modified starch 10 parts that step 5) obtains is got, joined in 100 parts of water, then add 8 parts of potash successively, 3 sodium acetates, 5 parts of propene carbonates were 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 5 parts of ethanol are added, 6 parts of neopelexes improve temperature to 40 degrees Celsius of Keep agitation 1 hour, then add 3 parts of dimethyl silicone polymers, 3 parts of modified sodium lignosulfonates, stir 30 minutes, mix and obtain finished product.
Embodiment 3
1) making concentration of slurry with cornstarch and water is that the ative starch of 28wt% is starched;
2) to step 1) 100 weight portion ative starch slurries add sodium sulfite 10 weight portion and stir 25 minutes, then add hydrochloric acid and regulate slurry pH value 3.0, be heated to 50 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 15 weight portion, react 25 minutes, then hydro-oxidation sodium agent adjust ph 11.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 55 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 30 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
6) modified starch 15 parts that step 5) obtains is got, joined in 110 parts of water, then add 12 parts of potash successively, 5 sodium acetates, 8 parts of propene carbonates were 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 8 parts of ethanol are added, 10 parts of neopelexes improve temperature to 40 degrees Celsius of Keep agitation 1 hour, then add 4 parts of dimethyl silicone polymers, 4 parts of modified sodium lignosulfonates, stir 30 minutes, mix and obtain finished product.
Comparative example 1
Starch 5 parts, joined in 80 parts of water, then add 2 parts of potash successively, 1 sodium acetate, 2 parts of propene carbonates were 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 2 parts of ethanol are added, 1 part of neopelex improves temperature to 40 degrees Celsius of Keep agitation 1 hour, then adds 2 parts of dimethyl silicone polymers, 2 parts of modified sodium lignosulfonates, stir 30 minutes, mix and obtain finished product.
Comparative example 2
1) making concentration of slurry with cornstarch and water is that the ative starch of 20wt% is starched;
2) to step 1) 100 weight portion ative starch slurries add sodium sulfite 10 weight portion and stir 15 minutes, then add hydrochloric acid and regulate slurry pH value 2.0, be heated to 45 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5 weight portion, react 15 minutes, then hydro-oxidation sodium agent adjust ph 10.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
6) modified starch 5 parts that step 5) obtains is got, joined in 80 parts of water, then 2 parts of potash are added successively, 1 sodium acetate, 2 parts of propene carbonates, 2 parts of ethanol, 1 part of neopelex, 2 parts of dimethyl silicone polymers, 2 parts of modified sodium lignosulfonates, stir 30 minutes, mix and obtain finished product.
Test case 1
Get the absorbing liquid of above-described embodiment 1-3, comparative example 1-2 respectively, mixing organic exhaust gas benzene,toluene,xylene concentration being 100ppm passes in absorbing liquid with the speed of 8L/min, and control liquid-gas ratio is 15L/m
2, obtain the extraction efficiency of benzene,toluene,xylene waste gas, concrete numerical value is listed in table 1 below.
Table 1
| Benzene clearance | Toluene removal rate | Dimethylbenzene clearance | |
| Embodiment 1 | 84.9％ | 83.8％ | 87.9％ |
| Embodiment 2 | 85.8％ | 85.6% | 88.7% |
| Embodiment 3 | 83.8% | 82.7% | 86.5% |
| Comparative example 1 | 74.1% | 74.3% | 76.4% |
| Comparative example 2 | 80.5% | 80.6% | 80.8% |
Can be found out by above-mentioned numerical value, the benzene,toluene,xylene clearance of embodiment 1-3 is greatly improved than the clearance in Chinese patent 201410447382.2, by improving its component, effectively improve the absorption clearance containing benzene organic exhaust gas.Modified starch is not used in comparative example 1, and employ common starch, its clearance decreases than embodiment 1-3, therefore can find out that starch conversion has a significant impact raising organic benzene, organic clearance, and only by each mixing of materials in comparative example 2, its organic benzene, organic clearance also decreases, and therefore can find out that the preparation method of absorbing liquid, incorporation time, temperature also have certain influence for the clearance of final benzene.
beneficial effect
Can be found out by the data of above-described embodiment and comparative example, significantly improved by the absorptivity of absorbing liquid to waste gas containing benzene of particular components of the present invention, effectively eliminate the toxic gas at waste gas end, and absorbing liquid safety of the present invention, economy are not easy to cause secondary pollution.
Above-mentionedly only several specific embodiments in the present invention to be illustrated; but can not as protection scope of the present invention; every according to the change of the equivalence done by design spirit in the present invention or to modify or equal proportion zooms in or out, all should think and fall into protection scope of the present invention.
Claims (3)
1., for an absorbing liquid for applying modified starch process industrial organic exhaust gas, it is characterized in that being made up of following raw material by weight:
About 80-110 part water, 2-12 part potash, 1-5 part sodium acetate, 2-8 part propene carbonate, 2-8 part ethanol, 1-10 part neopelex, 2-4 part dimethyl silicone polymer, 5-15 part modified starch, 2-4 part modified sodium lignosulfonate.
2. absorbing liquid according to claim 1, is characterized in that the preparation method of described modified starch is: 1) making concentration of slurry with cornstarch and water is that the ative starch of about 20-28wt% is starched;
2) to step 1) 100 weight portion ative starch slurry add sodium sulfite 10 weight portion stir 15-25 minute, then add hydrochloric acid regulate slurry pH value 2.0 ~ 3.0, be heated to about 45 ~ 50 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5-15 weight portion, reaction 15-25 minute, then hydro-oxidation sodium agent adjust ph 10.5 ~ 11.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 ~ 55 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 ~ 30 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%.
3. the preparation method of the absorbing liquid for applying modified starch process industrial organic exhaust gas according to claim 1-2, is characterized in that:
1) making concentration of slurry with cornstarch and water is that the ative starch of 20-28wt% is starched;
2) to step 1) 100 weight portion ative starch slurry add sodium sulfite 10 weight portion stir 15-25 minute, then add hydrochloric acid regulate slurry pH value 2.0 ~ 3.0, be heated to 45 ~ 50 DEG C, acidolysis reaction 3 hours;
3) to step 2) reacted ative starch slurry add NaOH adjust ph 9.0, then add sodium sulphate 5-15 weight portion, reaction 15-25 minute, then hydro-oxidation sodium agent adjust ph 10.5 ~ 11.5;
4) to step 3) reacted ative starch slurry add 5 parts of expoxy propane, and regulate temperature to 48 ~ 55 DEG C, react after 3 hours and the temperature of ative starch slurry is reduced to 25 ~ 30 DEG C, with hydrochloric acid, pH value is adjusted to 4;
5) by step 4) neutralization after ative starch plasm scouring, centrifugal, dry, make moisture control namely to obtain converted starch below 13%;
6) modified starch 5-15 part that step 5) obtains is got, joined in 80-110 part water, then add 2-12 part potash successively, 1-5 sodium acetate, 2-8 part propene carbonate was 30 degrees Celsius of lower stirring and dissolving 30 minutes, then 2-8 part ethanol is added, 1-10 part neopelex improves temperature to 40 degrees Celsius of Keep agitation 1 hour, then adds 2-4 part dimethyl silicone polymer, 2-4 part modified sodium lignosulfonate, stir 30 minutes, mix and obtain finished product.
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| CN106853321A (en) * | 2017-01-16 | 2017-06-16 | 安徽师范大学 | A kind of industrial waste gas absorbing liquid and preparation method thereof |
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| CN104275074A (en) * | 2014-05-13 | 2015-01-14 | 浙江大学 | Absorption liquid for treating benzene series organic waste gas and preparation method of absorption liquid for treating benzene series organic waste gas |
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| CN103752157A (en) * | 2014-01-26 | 2014-04-30 | 河北工程大学 | Catching agent of benzene series compounds and preparation method thereof |
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