CN1091058A - Method for preparation of ion exchange resin beads - Google Patents
Method for preparation of ion exchange resin beads Download PDFInfo
- Publication number
- CN1091058A CN1091058A CN93110078A CN93110078A CN1091058A CN 1091058 A CN1091058 A CN 1091058A CN 93110078 A CN93110078 A CN 93110078A CN 93110078 A CN93110078 A CN 93110078A CN 1091058 A CN1091058 A CN 1091058A
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- China
- Prior art keywords
- exchange resin
- sodium chloride
- ion exchange
- pearl
- styrene
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Abstract
In ion-exchange resin bead body polymerization process, add sodium chloride, can eliminate the bubble in the pearl body, improve pearl body rigidity, reduce percentage of damage.Ion exchange resin exchanging equivalent and the wear-resisting rate of utilizing this kind pearl system to make are significantly improved, and have prolonged resin service life.
Description
A kind of manufacture method of ion-exchange resin bead body, make in the process in benzethylene type ion exchange resin pearl system, add a certain amount of sodium chloride, can eliminate the bubble in the pearl body, and reduce percentage of damage in thereafter sulfonation or carboxylated process, and ion exchange resin exchanging equivalent and wear-resisting rate all have raising.
Ion exchange resin is broad-spectrum high molecular synthetic material, general cationic ion-exchange resin or anion exchange resin are all based on styrene type, the manufacturing of this resin, normally in the presence of initator, styrene and divinylbenzene aggregate into the pearl body, carry out sulfonation or processes such as carboxylated or ammonification then as required and make strong acidic ion resin or weak-acid cation-exchange resin or anion exchange resin.This known method, the pearl body is to carry out polymerization in aqueous gelatin solution, polymerization very easily produces bubble under this condition, pearl body intensity is descended, therefore the pearl body is easily broken in operation thereafter, and the proportion of goods damageds increase, and the wear-resisting rate of sold resin is low, reduced resin service life, especially the difficult control of storng-acid cation exchange resin, technology, and often cause waste product because of operate miss, be difficult to improve wear-resisting rate with usual way, the inventor proposes, and makes in the pearl system to add sodium chloride in the process, is made into sodium chloride-aqueous gelatin solution, polymerization in this kind aqueous solution, be difficult for producing bubble, thereby the pearl body structure is solid, rigidity improves, be difficult for fragmentation in operation thereafter, finished product exchanging equivalent and wear-resisting rate are significantly improved.For example, the storng-acid cation exchange resin exchanging equivalent of well-established law manufacturing is 4.0～4.5, and wear-resisting rate is more than 98%.
The pearl system making method of ion exchange resin of the present invention is that sodium chloride and gelatine is soluble in water, drops into styrene then, divinylbenzene, monomer materials such as initator, 75～95 ℃ of control temperature were reacted 7～10 hours, washing then, drying, screening is the ion-exchange resin bead body.
Pearl system making method of the present invention, polymerization single polymerization monomer styrene, divinylbenzene, initator benzoyl peroxide and gelatine proportioning are identical with well-established law, it is low not remarkable to improving wear-resisting rate effect that amount of sodium chloride is that 2.0～3.5% sodium chloride consumptions of styrene and divinylbenzene total amount are crossed, consumption is crossed the high abrasion rate does not have obviously increase mutually with this amount ranges yet, the sodium chloride amount is too high in the waste water on the contrary, easily pollutes.Sodium chloride can adopt industrial refined salt
Embodiment:
The manufacturing degree of cross linking is 7 pearl body, material mixture ratio (weight portion, down together): styrene 100; Divinylbenzene (40%) 20; Benzoyl peroxide 1; Sodium chloride 3; Gelatin 2.5; Deionized water 240.
Operating procedure: with styrene, divinylbenzene is removed polymerization inhibitor and benzoyl peroxide is dissolved in the mixed liquor; In reactor, drop into deionized water and be warming up to 30～35 ℃, add sodium chloride, start stirring and make it dissolving, drop into then and give the gelatin that dissolves with deionized water earlier, stir slightly, be warming up to 40～45 ℃ and add styrene, the mixed liquor of divinylbenzene slowly is warming up to 78 ℃, insulation reaction 2 hours, continue to be warming up to 85 ℃, keep reaction 2 hours, continue to be warming up to 85 ℃, insulation reaction 2 hours continues to be warming up to 90 ℃, is incubated 1 hour, be warming up to 95 ℃ at last, be incubated 5 hours.Reduce to washing below 90 ℃ then, be washed till the waste water non-foam, transparent, then 100-105 ℃ of following heated-air drying, the screening of dry back, gained pearl body be after testing: the degree of cross linking 7 floating amounts＜qualified no bubble of 1% moisture content＜1% granularity
The pearl system of Zhi Zaoing is equipped with storng-acid cation exchange resin as stated above:
Proportioning: pearl body 100; Sulfuric acid (92～93%); Dichloroethanes 34
Operating procedure: with the pearl body; Sulfuric acid; Dichloroethanes drops in the reactor, stirs and is warming up to 60 ℃, stops heating, naturally be warming up to 80 ℃, and insulation reaction 2 hours, be warming up to 85 ℃, insulation reaction 2 hours is warming up to 90 ℃, insulation reaction 1 hour, be warming up to 95 ℃, reacted 1 hour, be warming up to 118 ℃ at last and reclaim dichloroethanes, be cooled to 25 ℃ then, and add the Diluted Acid Washing 4 hours of the pearl scale of construction 50%, be washed to pH 4～5 at last, make the transition with 8% NaOH again, be washed to pH 7～8, be finished product.
Reference examples, except that not adding other proportioning the sodium chloride, process conditions are all identical with embodiment.
Its quality index contrast of embodiment and reference examples is as follows:
Index name embodiment reference examples
Grain in the big grain of grain in the big grain
Water content 46.6 45.5 46.5 45.8
Weight exchanging equivalent 4.2 4.5 4.0 4.2
(mg equivalent/gram dried resin)
Wet true specific gravity (20 ℃) 1.27 1.28 1.28 1.28
Wet apparent density (g/ml) 0.80 0.81 0.81 0.82
Wear-resisting rate (%) 98.5 98.9 90.00 93.00
Granularity (0.3～1.2m) 95.00 95.00 95.00 95.00
Claims (2)
1, a kind of manufacture method of benzethylene type ion exchange resin pearl body is characterized in that:
Sodium chloride and gelatine is soluble in water, drop into monomer materials such as styrene, divinylbenzene, initator then, 75～95 ℃ of control temperature were reacted 7～10 hours, washing then, drying, screening.
2, claim 1 is said adds sodium chloride in styrene and divinylbenzene polymerization, it is characterized in that:
Amount of sodium chloride is 2,0～3 of styrene and a divinylbenzene total amount, the 5%(weight portion)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93110078A CN1091058A (en) | 1993-02-09 | 1993-02-09 | Method for preparation of ion exchange resin beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93110078A CN1091058A (en) | 1993-02-09 | 1993-02-09 | Method for preparation of ion exchange resin beads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1091058A true CN1091058A (en) | 1994-08-24 |
Family
ID=4987986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93110078A Withdrawn CN1091058A (en) | 1993-02-09 | 1993-02-09 | Method for preparation of ion exchange resin beads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091058A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294153C (en) * | 2002-06-13 | 2007-01-10 | 谭小耀 | Suspension polymerization process and apparatus for synthesizing resin with uniform particle size |
-
1993
- 1993-02-09 CN CN93110078A patent/CN1091058A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294153C (en) * | 2002-06-13 | 2007-01-10 | 谭小耀 | Suspension polymerization process and apparatus for synthesizing resin with uniform particle size |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C03 | Withdrawal of patent application (patent law 1993) | ||
| WW01 | Invention patent application withdrawn after publication |