CN105435865A - Weak-acid cation-exchange resin regeneration method and application of organic weak acid in regeneration of weak-acid cation-exchange resin - Google Patents

Weak-acid cation-exchange resin regeneration method and application of organic weak acid in regeneration of weak-acid cation-exchange resin Download PDF

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Publication number
CN105435865A
CN105435865A CN201510996237.4A CN201510996237A CN105435865A CN 105435865 A CN105435865 A CN 105435865A CN 201510996237 A CN201510996237 A CN 201510996237A CN 105435865 A CN105435865 A CN 105435865A
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China
Prior art keywords
weak
exchange resin
acid
acid cation
described
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CN201510996237.4A
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Chinese (zh)
Inventor
王雯雯
边文兵
张中海
曲绍鹤
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芜湖美的厨卫电器制造有限公司
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Priority to CN201510996237.4A priority Critical patent/CN105435865A/en
Publication of CN105435865A publication Critical patent/CN105435865A/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/42Treatment of water, waste water, or sewage by ion-exchange
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances

Abstract

The invention provides a weak-acid cation-exchange resin regeneration method and application of an organic weak acid in regeneration of weak-acid cation-exchange resin. The method comprises the following step: contacting the weak-acid cation-exchange resin with the organic weak acid, so as to obtain the regenerated weak-acid cation-exchange resin. By virtue of adopting the organic weak acid as a regenerant of the weak-acid cation-exchange resin, the weak-acid cation-exchange resin can be rapidly and effectively regenerated, meanwhile the safety is greatly improved in comparison with that of strong acids such as hydrochloric acid and sulfuric acid in the prior art; the regeneration process is performed under conditions of normal temperature and normal pressure, no other special conditions and properties are required, and the preparation method can be performed at any time at home.

Description

The method of regeneration weak-acid cation-exchange resin and the purposes of organic monoacid in regeneration weak-acid cation-exchange resin

Technical field

The present invention relates to field of material technology, particularly, relate to method and the purposes of organic monoacid in regeneration weak-acid cation-exchange resin of regeneration weak-acid cation-exchange resin.

Background technology

Weak-acid cation-exchange resin also can remove the calcium magnesium hardness of part in water while basicity in water removing; softening influent quality; as everyone knows; demineralized water has extraordinary effect to protection skin and beauty treatment; demineralized water cleaning skin; nonirritant, solubility increases, and has good lubrication protection effect to skin and hair.

The life-span of weak-acid cation-exchange resin is general shorter, at present, mostly resin filter element on market is deserted, but the iterative regenerable of ion exchange resin to utilize be the important characteristic of its one, the way of deserted resin filter element is a kind of wasting of resources, and causes the noxious waste pollution of environment.Weak-acid cation-exchange resin many employings strong acid example hydrochloric acid or sulfuric acid regenerate, and operate more dangerous, regeneration cost is higher, and generally industrially apply.Allow the weak-acid cation-exchange resin that common consumer uses in daily life, then above-mentioned regeneration can be a kind of obstruction.

Thus, current resin regeneration technique still haves much room for improvement.

Summary of the invention

The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is a kind of method proposing regeneration weak-acid cation-exchange resin safe and effective, simple to operation.

The present invention completes based on the following discovery of inventor:

The skin surface of human body has the weakly acidic diaphragm of one deck, and the hardness in water and basicity can destroy the weak acid environment of skin, cause burden to skin; Preferably can remove surface smut during cleaning skin, not destroy again the faintly acid diaphragm of skin, otherwise can cause pachylosis, the hard water that scale is many is clearly to the tender and lovely skin infringement of health face; If part hardness in water can be removed, and basicity in water is converted into faintly acid, can available protecting skin, make facial skin more lubricate moisturizing.Usually, basicity and hardness in weak-acid cation-exchange resin process water can be used, and prepare weakly acidic demineralized water, but the service life of weak-acid cation-exchange resin is shorter, the resin of 1L only can process the high hardness water (total hardness 450mg/L, total alkalinity 200mg/L) of 1.5T, and it is unfavorable directly to abandon environment, and the regenerative agent of existing weak-acid cation-exchange resin is strong acid, use very dangerous.For the problems referred to above, the present inventor explores and experiment through a large amount of, find that the organic monoacids such as citric acid, malic acid, acetic acid, salicylic acid effectively can realize regenerating the effect of weak-acid cation-exchange resin, regenerative process can be carried out at normal temperatures and pressures, without the condition character that other are special, simple to operation, can operate at any time at home, or machine automatization controls (edit routine) to carry out, and security is high, and cost is low.

In view of this, in one aspect of the invention, the invention provides a kind of method regenerating weak-acid cation-exchange resin.According to embodiments of the invention, the method comprises: weak-acid cation-exchange resin is contacted with organic monoacid, to obtain regeneration weak-acid cation-exchange resin.Utilize the method according to the embodiment of the present invention, fast and effeciently can regenerate weak-acid cation-exchange resin, and simple, convenient, do not need special operational skill and harsh reaction condition, and cost is lower, regeneration effect is better, in addition, relative to adopting the strong acid such as hydrochloric acid, sulfuric acid as regenerative agent in prior art, method of the present invention adopts organic monoacid to substantially increase security, can use at any time in daily life, extend range of application.

According to embodiments of the invention, weak-acid cation-exchange resin is contacted with organic monoacid and one of is at least carried out by following: back flush; Static soak; Forward rinses.According to a concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, static soak and forward and rinse.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, static soak, back flush, static soak and forward and rinse.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, forward flushing, static soak and back flush.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively static soak, back flush, forward flushing and static soak.According to another concrete example of invention, described weak-acid cation-exchange resin can be carried out static soak.

According to embodiments of the invention, in static soak step, comprise further: the step of air-blowing or stirring weak-acid cation-exchange resin.

According to embodiments of the invention, forward rinses and in back flush step, the flow velocity of organic monoacid is 1 ~ 4L/ minute independently of one another.

According to embodiments of the invention, the time that back flush, static soak and forward rinse is not less than 10 minutes independently of one another.

According to embodiments of the invention, organic monoacid is be selected from least one in citric acid, malic acid, salicylic acid and acetic acid.

According to embodiments of the invention, organic monoacid provides with the form of the organic monoacid aqueous solution that mass concentration is 6% ~ 15%.

In another aspect of this invention, the invention provides the purposes of organic monoacid in regeneration weak-acid cation-exchange resin.Inventor finds, by adopting organic monoacid as the regenerative agent of weak-acid cation-exchange resin, while weak-acid cation-exchange resin can be made fast and effectively to regenerate, compared to strong acid such as hydrochloric acid of the prior art, sulfuric acid, security improves greatly, regenerative process can be carried out at normal temperatures and pressures, without the restriction of other special conditions, can operate at any time at home.

According to embodiments of the invention, organic monoacid is be selected from least one in citric acid, malic acid, salicylic acid and acetic acid.

According to embodiments of the invention, organic monoacid provides with the form of the organic monoacid aqueous solution that mass concentration is 6% ~ 15%.

Detailed description of the invention

Embodiments of the invention are described below in detail.Embodiment described below is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.Unreceipted concrete technology or condition in embodiment, according to the technology described by the document in this area or condition or carry out according to product description.Agents useful for same or the unreceipted production firm person of instrument, being can by the conventional products of commercial acquisition.

In one aspect of the invention, the invention provides a kind of method regenerating weak-acid cation-exchange resin.According to embodiments of the invention, the method comprises: weak-acid cation-exchange resin is contacted with organic monoacid, to obtain regeneration weak-acid cation-exchange resin.Utilize the method according to the embodiment of the present invention, fast and effeciently can regenerate weak-acid cation-exchange resin, and simple, convenient, do not need special operational skill and harsh reaction condition, and cost is lower, regeneration effect is better, in addition, relative to adopting the strong acid such as hydrochloric acid, sulfuric acid as regenerative agent in prior art, method of the present invention adopts organic monoacid to substantially increase security, can use at any time in daily life, extend range of application.

According to embodiments of the invention, weak-acid cation-exchange resin is contacted with organic monoacid and one of is at least carried out by following: back flush; Static soak; Forward rinses.When the method for this regeneration weak-acid cation-exchange resin comprise back flush, static soak, forward rinse in two or more time, tandem and the number of processes of each step are not particularly limited, and those skilled in the art can select according to actual needs flexibly.Such as include but not limited to, according to a concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, static soak and forward and rinse.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, static soak, back flush, static soak and forward and rinse.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively back flush, forward flushing, static soak and back flush.According to another concrete example of invention, weak-acid cation-exchange resin can be carried out successively static soak, back flush, forward flushing and static soak.According to another concrete example of invention, described weak-acid cation-exchange resin can be carried out static soak.

According to embodiments of the invention, back flush can be carried out according to following steps: pass into organic monoacid to the ion-exchange column bottom that weak-acid cation-exchange resin is housed, carry out back flush to weak-acid cation-exchange resin.This backwashing manner can break up resin particle, allows regenerated liquid fully contact with resin particle, significantly improves regeneration effect.

According to embodiments of the invention, in order to obtain better regeneration effect, in back flush step, the flow velocity of organic monoacid is unsuitable too fast, and in some embodiments of the invention, the flow velocity of organic monoacid can be 1 ~ 4L/ minute.Thereby, it is possible to ensure to obtain good regeneration effect, the utilization rate of organic monoacid is higher simultaneously, can not waste, good economy performance.

According to embodiments of the invention, the time of back flush is not particularly limited, and those skilled in the art can adjust according to regeneration rate.In some embodiments of the invention, the time of back flush is not less than 10 minutes.In certain embodiments, can be 10 ~ 30 minutes, in further embodiments, can be more than 30 minutes.Thereby, it is possible to obtain desirable regeneration effect.

According to embodiments of the invention, static soak can carry out according to following steps: in ion exchange column, pass into organic monoacid, to the complete submergence weak-acid cation-exchange resin of organic monoacid, carries out static soak to weak-acid cation-exchange resin.Thereby, it is possible to make weak-acid cation-exchange resin fully contact with organic monoacid, be conducive to improving regeneration effect.

According to embodiments of the invention, in static soak step, may further include: the step of air-blowing or stirring weak-acid cation-exchange resin in ion exchange column.Thereby, it is possible to effectively accelerate reproduction speed.

According to embodiments of the invention, the time of static soak is not particularly limited, and those skilled in the art can adjust according to regeneration rate.In some embodiments of the invention, the time of static soak is not less than 10 minutes.In certain embodiments, can be 10 ~ 30 minutes, in further embodiments, can be more than 30 minutes.Thereby, it is possible to obtain desirable regeneration effect.

According to embodiments of the invention, forward rinses and can carry out according to following steps: in ion exchange column, pass into organic monoacid from top to bottom, carry out forward flushing to weak-acid cation-exchange resin.Thereby, it is possible to while carrying out regenerating, weak-acid cation-exchange resin compacting, weak-acid cation-exchange resin can also be convenient to and restart work.

According to embodiments of the invention, in order to obtain better regeneration effect, in forward rinsing step, the flow velocity of organic monoacid is unsuitable too fast, and in some embodiments of the invention, the flow velocity of organic monoacid can be 1 ~ 4L/ minute.Thereby, it is possible to ensure to obtain good regeneration effect, the utilization rate of organic monoacid is higher simultaneously, can not waste, good economy performance.

According to embodiments of the invention, the time that forward rinses is not particularly limited, and those skilled in the art can adjust according to regeneration rate.In some embodiments of the invention, the time of back flush is not less than 10 minutes.In certain embodiments, can be 10 ~ 20 minutes, in further embodiments, can be more than 20 minutes.Thereby, it is possible to obtain desirable regeneration effect.

According to embodiments of the invention, organic monoacid can for being selected from least one in citric acid, malic acid, salicylic acid and acetic acid.Thus, favorable regeneration effect, and raw material sources are extensive, cheap, and citric acid etc. all may be used for food or cosmetics, can accelerate cutin and upgrade, contribute to the melanic of skin and peel off, the receipts of pore are thin, the dissolving etc. of blackhead.In regenerative process, can waste more flushing liquor, residual regenerative agent does not also injure skin, and the organic monoacid such as remaining citric acid can improve skin on the contrary.

According to embodiments of the invention, the form of the organic monoacid aqueous solution that organic monoacid can be 6% ~ 15% with mass concentration provides.Thus, regeneration effect is better, and can not cause the waste of regenerative agent.If the concentration of the organic monoacid aqueous solution is too low, then regeneration effect is not obvious, if the excessive concentration of the organic monoacid aqueous solution, cost is higher, causes the waste of regenerative agent.If the concentration of the organic monoacid aqueous solution is in above-mentioned scope, both can ensure desirable regeneration effect, also can not cause waste.

Simple according to the Measures compare of the regeneration weak-acid cation-exchange resin of the embodiment of the present invention, just can operate in common family, water inlet (back flush) from bottom to top may need a low power pump, if adopt top-down regeneration, do not need the assistance of pump, regeneration rate is greatly about 60%-70%.If use magnetic valve, the automatic regeneration of weak-acid cation-exchange resin can also be realized, more convenient.In addition, the regenerative agent used in regeneration scheme is citric acid or other food acids of food-grade, not only can not bring injury to skin, can also improve skin quality.In addition; weak-acid cation-exchange resin uses the organic monoacids such as the safe citric acid of food-grade as regenerative agent; the mode adopting sound state to combine regenerates weak-acid cation-exchange resin; achieve the recycling of weak-acid cation-exchange resin; be a kind of protection to environmental resource, also save replacement cost and solve the safety problem that weak-acid cation-exchange resin must use strong acid to regenerate.

In another aspect of the present invention, the invention provides the purposes of organic monoacid in regeneration weak-acid cation-exchange resin.Inventor finds, by adopting organic monoacid as the regenerative agent of weak-acid cation-exchange resin, while weak-acid cation-exchange resin can be made fast and effectively to regenerate, compared to the strong acid such as hydrochloric acid, sulfuric acid of prior art, security improves greatly, regenerative process can be carried out at normal temperatures and pressures, without the condition character that other are special, can operate at any time at home.

According to embodiments of the invention, organic monoacid can for being selected from least one in citric acid, malic acid, salicylic acid and acetic acid.Thus, favorable regeneration effect, and raw material sources are extensive, cheap, and citric acid etc. all may be used for food or cosmetics, can accelerate cutin and upgrade, contribute to the melanic of skin and peel off, the receipts of pore are thin, the dissolving etc. of blackhead.In regenerative process, can waste more flushing liquor, residual regenerative agent does not also injure skin, and the organic monoacid such as remaining citric acid can improve skin on the contrary.

According to embodiments of the invention, the form of the organic monoacid aqueous solution that organic monoacid can be 6% ~ 15% with mass concentration provides.Thus, regeneration effect is better, and can not cause the waste of regenerative agent.If the concentration of the organic monoacid aqueous solution is too low, then regeneration effect is not obvious, if the excessive concentration of the organic monoacid aqueous solution, cost is higher, then cause the waste of regenerative agent.If the organic monoacid aqueous solution in above-mentioned scope, both can ensure desirable regeneration effect, also can not cause waste.

Embodiments of the invention are described below in detail.

Embodiment 1

First, preparation mass concentration is the citric acid actified solution of 6%-15%, then according to following steps regeneration weak-acid cation-exchange resin:

The citric acid actified solution (flow velocity 1 ~ 4L/min) of above-mentioned preparation is passed into, back flush from bottom to top, washing time 10-30 minute bottom the cylinder that weak-acid cation-exchange resin is housed; Then, inject citric acid actified solution in forward or reverse cylinder, during complete submergence weak-acid cation-exchange resin, stop fluid injection.Soak weak-acid cation-exchange resin, allow saturated resin fully and the hydrogen ion of citric acid solution exchange, as required, can while to air-blowing or stirring in resin soak, to accelerate exchange velocity, static soak time 10-30 minute; Open lower set switch, release actified solution, pass into citric acid actified solution from top to down to the filter core that resin is housed, carry out through weak-acid cation-exchange resin the dynamic regeneration that flows slowly with slower flow velocity (1 ~ 4L/min), the time is 10-20 minute; Obtain regeneration weak-acid cation-exchange resin.After having regenerated, can first lead to running water or the 2-3min that purifies waste water, wash away the actified solution that concentration is higher, the regeneration weak-acid cation-exchange resin obtained just can normally use.

After testing, the regeneration rate of weak-acid cation-exchange resin is 65%.

Embodiment 2

First, preparation mass concentration is the malic acid actified solution of 6%-15%, then according to following steps regeneration weak-acid cation-exchange resin:

To be equipped with Subacidity cation exchanger resin cylinder bottom pass into the malic acid actified solution (flow velocity 1 ~ 4L/min) of above-mentioned preparation, back flush from bottom to top, washing time about 10 minutes; Then, forward or reversely inject malic acid actified solution in cylinder, stops fluid injection during complete submergence resin.Soak resin, allow saturated resin fully and the hydrogen ion of malic acid actified solution exchange, as required can while to air-blowing or stirring in resin soak, to accelerate exchange velocity, about 15 minutes static soak time; Then, open lower set switch, release actified solution, passing into malic acid actified solution to the lower and upper cylinder to being equipped with resin, dynamically regenerating through resin with slower flow velocity (1 ~ 4L/min).The time that unhurried current dynamically regenerates is about 10 minutes; Then again in cylinder, inject malic acid actified solution, stop fluid injection to during complete submergence resin.Soak resin, allow saturated resin hydrogen ion that is abundant and malic acid actified solution exchange, about the 15 minutes static soak time again; Then, open lower set switch, release actified solution, malic acid actified solution is passed into from top to down in the cylinder that resin is housed, dynamically regenerate through resin with slower flow velocity (1 ~ 4L/min), the time that unhurried current dynamically regenerates is about 10 minutes, obtains regeneration weak-acid cation-exchange resin.After having regenerated, can first lead to running water or the 2-3min that purifies waste water, wash away the actified solution that concentration is higher, the regeneration weak-acid cation-exchange resin obtained just can normally use.

After testing, the regeneration rate of weak-acid cation-exchange resin is 70%.

Embodiment 3

First, preparation mass concentration is the salicylic acid actified solution of 6%-15%, then according to following steps regeneration weak-acid cation-exchange resin:

To be equipped with Subacidity cation exchanger resin cylinder bottom pass into the salicylic acid actified solution of above-mentioned preparation, back flush from bottom to top, washing time 10-30 minute; Then change and rinse direction, pass into salicylic acid actified solution from top to bottom, dynamically regenerate with slower flow velocity (1 ~ 4L/min) through resin to resin column, the time that unhurried current dynamically regenerates is 10-20 minute; Then forward or reversely inject salicylic acid actified solution in resin column, stops fluid injection to during complete submergence resin.Soak resin, allow saturated resin fully and the hydrogen ion of salicylic acid actified solution exchange, can as required to air-blowing or stirring in resin soak, to accelerate exchange velocity, static soak time 10-30 minute; Next, open lower set switch, release actified solution, salicylic acid actified solution is passed into the lower and upper cylinder to being equipped with resin, dynamically regenerate through resin with slower flow velocity (1 ~ 4L/min), the time that unhurried current dynamically regenerates is 10-20 minute, obtains regeneration weak-acid cation-exchange resin.After having regenerated, can first lead to running water or the 2-3min that purifies waste water, wash away the actified solution that concentration is higher, the regeneration weak-acid cation-exchange resin obtained just can normally use.

After testing, the regeneration rate of weak-acid cation-exchange resin is 68%.

Embodiment 4

First, preparation mass concentration is the acetic acid actified solution of 6%-15%, then according to following steps regeneration weak-acid cation-exchange resin:

Injecting the acetic acid actified solution of above-mentioned preparation in forward or the reverse cylinder to being equipped with weak-acid cation-exchange resin, stopping fluid injection to during complete submergence resin.Soak resin, allow saturated resin fully and the hydrogen ion of acetic acid actified solution exchange, can as required to air-blowing or stirring in resin soak, to accelerate exchange velocity, static soak time 10-30 minute, then bottom the cylinder that weak-acid cation-exchange resin is housed, acetic acid actified solution is passed into, back flush from bottom to top, washing time 10-20 minute, then, open lower set switch, release actified solution, acetic acid actified solution is passed into from top to down in the cylinder that resin is housed, dynamically regenerate through resin with slower flow velocity (1 ~ 4L/min), the time that unhurried current dynamically regenerates is about 10-20 minute, then in cylinder, acetic acid actified solution is injected again, to complete submergence resin, again soak static regeneration 10-30 minute, obtain regeneration weak-acid cation-exchange resin.After having regenerated, can first lead to running water or the 2-3min that purifies waste water, wash away the actified solution that concentration is higher, the regeneration weak-acid cation-exchange resin obtained just can normally use.

After testing, the regeneration rate of weak-acid cation-exchange resin is 70%.

Embodiment 5

First, preparation mass concentration is the citric acid actified solution of 6%-15%, then according to following steps regeneration weak-acid cation-exchange resin:

Forward or the interior citric acid actified solution injecting above-mentioned preparation of reverse cylinder, stop fluid injection to during complete submergence weak-acid cation-exchange resin.Soak weak-acid cation-exchange resin, allow saturated resin hydrogen ion that is abundant and citric acid solution exchange, as required, can simultaneously to air-blowing or stirring in resin soak, to accelerate exchange velocity, more than 30 minutes static soak time, obtain regeneration weak-acid cation-exchange resin.After having regenerated, can first lead to running water or the 2-3min that purifies waste water, wash away the actified solution that concentration is higher, the regeneration weak-acid cation-exchange resin obtained just can normally use.

After testing, the regeneration rate of weak-acid cation-exchange resin is 65%.

In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.

Claims (11)

1. regenerate a method for weak-acid cation-exchange resin, it is characterized in that, comprising: weak-acid cation-exchange resin is contacted with organic monoacid, to obtain regeneration weak-acid cation-exchange resin.
2. method according to claim 1, is characterized in that, described in weak-acid cation-exchange resin is contacted with organic monoacid one of at least carried out by following:
Back flush;
Static soak;
Forward rinses.
3. method according to claim 2, is characterized in that, in described static soak step, comprises further:
Air-blowing or stir the step of described weak-acid cation-exchange resin.
4. method according to claim 2, is characterized in that, described forward rinses and in back flush step, the flow velocity of described organic monoacid is 1 ~ 4L/ minute independently of one another.
5. method according to claim 2, is characterized in that, the time that described back flush, static soak and forward rinse is not less than 10 minutes independently of one another.
6. the method according to any one of claim 1-5, is characterized in that, described organic monoacid is be selected from least one in citric acid, malic acid, salicylic acid and acetic acid.
7. method according to claim 6, is characterized in that, described organic monoacid provides with the form of the organic monoacid aqueous solution that mass concentration is 6% ~ 15%.
8. method according to claim 2, is characterized in that, comprises one of following:
Described weak-acid cation-exchange resin is carried out successively described back flush, static soak and forward to rinse;
Described weak-acid cation-exchange resin is carried out successively described back flush, static soak, back flush, static soak and forward to rinse;
Described weak-acid cation-exchange resin is carried out successively described back flush, forward flushing, static soak and back flush;
Described weak-acid cation-exchange resin is carried out successively described static soak, back flush, forward flushing and static soak;
Described weak-acid cation-exchange resin is carried out described static soak.
9. the purposes of organic monoacid in regeneration weak-acid cation-exchange resin.
10. purposes according to claim 9, is characterized in that, described organic monoacid is be selected from least one in citric acid, malic acid, salicylic acid and acetic acid.
11. purposes according to claim 10, is characterized in that, described organic monoacid provides with the form of the organic monoacid aqueous solution that mass concentration is 6% ~ 15%.
CN201510996237.4A 2015-12-23 2015-12-23 Weak-acid cation-exchange resin regeneration method and application of organic weak acid in regeneration of weak-acid cation-exchange resin CN105435865A (en)

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张维科 等: ""再生方法对阳离子交换树脂再生度的影响"", 《热力发电》 *

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