CN115148500A - Preparation method of aluminum capacitor electrolyte - Google Patents
Preparation method of aluminum capacitor electrolyte Download PDFInfo
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- CN115148500A CN115148500A CN202110340637.5A CN202110340637A CN115148500A CN 115148500 A CN115148500 A CN 115148500A CN 202110340637 A CN202110340637 A CN 202110340637A CN 115148500 A CN115148500 A CN 115148500A
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- electrolyte
- aluminum capacitor
- capacitor electrolyte
- solute
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 84
- 239000003990 capacitor Substances 0.000 title claims abstract description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003607 modifier Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 17
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims description 15
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 claims description 15
- 239000000811 xylitol Substances 0.000 claims description 15
- 235000010447 xylitol Nutrition 0.000 claims description 15
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 claims description 15
- 229960002675 xylitol Drugs 0.000 claims description 15
- 150000008301 phosphite esters Chemical class 0.000 claims description 12
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 12
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 claims description 10
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 6
- 150000007524 organic acids Chemical class 0.000 claims description 6
- 150000005846 sugar alcohols Chemical class 0.000 claims description 6
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 4
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 4
- 229930195725 Mannitol Natural products 0.000 claims description 4
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000594 mannitol Substances 0.000 claims description 4
- 235000010355 mannitol Nutrition 0.000 claims description 4
- 239000000600 sorbitol Substances 0.000 claims description 4
- 235000010356 sorbitol Nutrition 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004042 decolorization Methods 0.000 abstract description 5
- CLBRCZAHAHECKY-UHFFFAOYSA-N [Co].[Pt] Chemical compound [Co].[Pt] CLBRCZAHAHECKY-UHFFFAOYSA-N 0.000 description 17
- 238000004737 colorimetric analysis Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 14
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 10
- 238000005259 measurement Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 3
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000957 no side effect Toxicity 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
Abstract
The invention belongs to the technical field of aluminum electrolytic capacitors, and particularly relates to a preparation method of an aluminum capacitor electrolyte, which comprises the following steps: (1) Heating and stirring a solvent, a solute and a chromaticity modifier uniformly; (2) Continuously heating and stirring, preserving heat, and cooling to obtain electrolyte; in the step (1), the heating and stirring temperature is 30-100 ℃. The preparation method of the aluminum capacitor electrolyte effectively inhibits the problem of deepening of the color of the electrolyte by controlling the adding sequence and the adding temperature of the chromaticity modifier, realizes that the color of the electrolyte product is colorless to light yellow, and has obvious decolorization effect, convenient and simple operation, small input amount and stable effect.
Description
Technical Field
The invention belongs to the technical field of aluminum electrolytic capacitors, and particularly relates to a preparation method of an aluminum capacitor electrolyte.
Background
In the aluminum electrolytic capacitor, the electrolyte plays an important role in providing oxygen ions and repairing an anodic oxide film, so that the improvement of the quality of the electrolyte is one of the keys for improving the performance of the capacitor.
In the process of preparing the electrolyte, solutes such as organic acids, sugar alcohols and the like in the electrolyte and the prepared electrolyte are often brown to dark brown (chroma is more than 500Hazen, platinum-cobalt standard colorimetric method) after being heated and boiled at high temperature for a long time, and the appearance and the electrolyte performance are directly influenced. Mainstream decolorization technologies comprise activated carbon adsorption, sol-gel flocculation, oxidant oxidation decolorization and the like, and the subsequent decolorization treatment schemes are complex in operation, large in loss, unobvious in chromaticity improvement, cause waste of energy and resources, and often cause the performance degradation of subsequent prepared electrolyte and harm to the environment.
At present, an effective method for solving the problem of solute and electrolyte color change in the process of preparing the aluminum capacitor electrolyte is lacked. Therefore, it is necessary to develop a method for remarkably improving the chromaticity of the electrolyte with simple operation and low cost.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a preparation method of an aluminum capacitor electrolyte with simple process, low cost and significantly improved electrolyte chromaticity.
A preparation method of an aluminum capacitor electrolyte comprises the following steps:
(1) Heating and stirring a solvent, a solute and a chromaticity modifier uniformly;
(2) Continuously heating and stirring, preserving heat, and naturally cooling to obtain electrolyte;
in the step (1), the heating and stirring temperature is 30-100 ℃.
In the electrolyte preparation method, the addition sequence of the chroma modifier is required to be before heat preservation, more specifically, the chroma modifier is added before each material reaction (including esterification reaction, oxidation reaction and dehydration reaction), and the proper addition temperature of the chroma modifier is 30-100 ℃. By controlling the adding sequence and the adding temperature, the color deepening of the solute and the electrolyte can be effectively inhibited.
Further, the mass ratio of the solvent to the solute is (0.5-1): 1.
Further, the solute includes organic acids and sugar alcohols; the organic acid comprises one or more of suberic acid, azelaic acid and dodecanedioic acid; the sugar alcohol comprises one or more of mannitol, sorbitol and xylitol. Specifically, the mixing mass ratio of the organic acid and the sugar alcohol in the solute composition is not limited.
Further, the solvent is one or two of ethylene glycol and gamma-butyrolactone.
Further, the chroma modifier comprises one or more of hypophosphorous acid, ammonium hypophosphite and phosphite ester.
Further, the addition mass of the chroma improving agent accounts for 0.01-2%, more preferably 0.1-0.5% of the solute.
Further, the stirring temperature and the heat preservation temperature in the step (2) are 120-180 ℃, the heat preservation time is 4-6 hours, and the heat preservation time is 1-8 hours, more preferably 140-160 ℃.
The preparation method of the aluminum capacitor electrolyte has the following beneficial effects:
(1) According to the preparation method of the aluminum capacitor electrolyte, the chroma modifier is added, the adding sequence and the adding temperature of the chroma modifier are limited, the deepening of the solute and the electrolyte can be effectively inhibited, the problem that the color of the electrolyte is deepened and blackened and browned in the high-temperature boiling process of the electrolyte is solved, the color of the electrolyte product is colorless to light yellow, the decoloring effect is obvious, and meanwhile, the preparation method is simple in process and low in cost; compared with the subsequent decolorization treatment, the method of the invention has no harm to the subsequent synthesis of electrolyte and environment.
(2) In the preparation method of the aluminum capacitor electrolyte, the addition amount of the chromaticity modifier is small, but the effect is stable, and no side effect is caused on the subsequent synthesis of the electrolyte.
Detailed Description
The technical solutions in the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
250g of ethylene glycol, 500g of suberic acid and 2.0g of hypophosphorous acid are respectively weighed in a flask, heated and stirred to 30 ℃, continuously heated to 140 ℃, stirred and kept warm for 4 hours, and the electrolyte obtained after natural cooling is subjected to measurement of chromaticity by a platinum-cobalt colorimetric method and observation of appearance color, and the results are shown in Table 1.
Example 2
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
500g of ethylene glycol, 500g of sorbitol and 1.0g of phosphorous acid are weighed respectively in a flask, heated and stirred to 50 ℃, continuously heated to 145 ℃, stirred and kept warm for 4.5 hours, and then the electrolyte obtained after natural cooling is measured in chromaticity by a platinum-cobalt colorimetric method and observed in appearance color, and the result is shown in table 1.
Practice of example 3
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 2.4g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then naturally cooled to obtain an electrolyte, the chromaticity of which is measured by a platinum-cobalt colorimetric method, and the appearance color of which is observed, wherein the results are shown in Table 1.
Example 4
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
550g of ethylene glycol, 200g of dodecanedioic acid, 200g of suberic acid, 100g of mannitol, 50g of xylitol, 1.1g of phosphorous acid and 1.1g of ammonium hypophosphite are respectively weighed in a flask, heated to 90 ℃, continuously heated to 155 ℃, kept warm for 5.5 hours, and naturally cooled to obtain an electrolyte, and the chromaticity of the electrolyte is measured by a platinum-cobalt colorimetric method, and the appearance color is observed, wherein the results are shown in Table 1.
Example 5
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
600g of ethylene glycol, 100g of dodecanedioic acid, 200g of suberic acid, 100g of azelaic acid, 50g of mannitol, 50g of xylitol, 100g of sorbitol, 1.0g of phosphorous acid, 1.0g of ammonium hypophosphite and 1.0g of phosphite are respectively weighed into a flask, heated and stirred to 100 ℃, continuously heated to 160 ℃, stirred and kept warm for 6 hours, and the electrolyte obtained after natural cooling is used for measuring the chromaticity by a platinum-cobalt colorimetric method and observing the appearance color, and the results are shown in table 1.
Comparative example 1
The material information of the aluminum capacitor electrolyte of the comparative example is as follows:
250g of ethylene glycol and 500g of suberic acid are respectively weighed in a flask, the temperature is directly raised to 140 ℃, after stirring and heat preservation are carried out for 4 hours, the electrolyte obtained after natural cooling is used for measuring the chroma by a platinum-cobalt colorimetric method, and the appearance color is observed, and the result is shown in table 1.
Comparative example 2
The material information of the aluminum capacitor electrolyte of the comparative example is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid and 200g of xylitol are respectively weighed in a flask, the temperature is directly raised to 155 ℃, the mixture is stirred and kept for 5.5 hours, the electrolyte obtained after natural cooling is subjected to colorimetric determination of chromaticity by a platinum-cobalt colorimetric method, and the appearance color is observed, and the results are shown in Table 1.
Comparative example 3
The material information of the aluminum capacitor electrolyte of the comparative example is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid and 200g of xylitol are weighed respectively in a flask, the temperature is directly raised to 120 ℃,2.4g of phosphite ester is added, the temperature is continuously raised to 155 ℃, the mixture is stirred and kept for 5.5 hours, the electrolyte obtained after natural cooling is subjected to chromaticity measurement by a platinum-cobalt colorimetric method, and the appearance color is observed, and the result is shown in table 1.
Comparative example 4
The material information of the aluminum capacitor electrolyte of the comparative example is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid and 200g of xylitol are respectively weighed in a flask, the temperature is directly raised to 155 ℃, after stirring and heat preservation are carried out for 5.5 hours, 2.4g of phosphite ester is added, stirring is carried out uniformly, the electrolyte obtained after natural cooling is used for measuring the chromaticity by a platinum-cobalt colorimetric method, and the appearance color is observed, and the result is shown in table 1.
TABLE 1 results of color test of chroma and appearance of electrolyte in examples 1 to 5 and comparative examples 1 to 4
| Group of | chroma/Hazen | Apparent color |
| Example 1 | 25 | Colorless and colorless |
| Example 2 | 45 | Colorless and colorless |
| Example 3 | 105 | Light yellow |
| Example 4 | 132 | Light yellow |
| Example 5 | 116 | Yellow colour |
| Comparative example 1 | >500 | Brown colour |
| Comparative example 2 | >500 | Dark brown color |
| Comparative example 3 | >500 | Dark brown color |
| Comparative example 4 | >500 | Dark brown color |
As is apparent from Table 1 comparing the test results of examples 1 to 5 and comparative examples 1 to 4, the present invention can effectively suppress the darkening of the color of the electrolyte, which is colorless or pale yellow, by defining the addition order and addition temperature of the chroma improving agent.
Example 6
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 0.04g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then naturally cooled to obtain an electrolyte, the chromaticity of which is measured by a platinum-cobalt colorimetric method, and the appearance color of which is observed, wherein the results are shown in Table 2.
Example 7
The material information of the aluminum capacitor electrolyte in the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 0.4g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and the electrolyte obtained after natural cooling is subjected to colorimetric determination of chromaticity by a platinum-cobalt colorimetric method and observation of appearance color, and the result is shown in table 2.
Example 8
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 1.2g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then naturally cooled to obtain an electrolyte, the chromaticity of which is measured by a platinum-cobalt colorimetric method, and the appearance color of which is observed, wherein the results are shown in Table 2.
Example 9
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 2g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then the electrolyte obtained after natural cooling is subjected to measurement of chromaticity by a platinum-cobalt colorimetric method and observation of appearance color, and the result is shown in table 2.
Example 10
The material information of the aluminum capacitor electrolyte in the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 4g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then the electrolyte obtained after natural cooling is subjected to measurement of chromaticity by a platinum-cobalt colorimetric method and observation of appearance color, and the result is shown in table 2.
Example 11
The material information of the aluminum capacitor electrolyte in the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 6g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and then the electrolyte obtained after natural cooling is subjected to measurement of chromaticity by a platinum-cobalt colorimetric method and observation of appearance color, and the result is shown in table 2.
Example 12
The material information of the aluminum capacitor electrolyte of the embodiment is as follows:
300g of ethylene glycol, 200g of dodecanedioic acid, 200g of xylitol and 8g of phosphite ester are respectively weighed in a flask, heated and stirred to 70 ℃, continuously heated to 150 ℃, stirred and kept warm for 5 hours, and the electrolyte obtained after natural cooling is subjected to chromaticity measurement by a platinum-cobalt colorimetric method and appearance color observation, and the result is shown in table 2.
TABLE 2 electrolyte chroma and appearance color test results of examples 6-12
| Group of | chroma/Hazen | Apparent color |
| Example 6 | 241 | Yellow colour |
| Example 7 | 168 | Light yellow |
| Example 8 | 109 | Light yellow |
| Example 9 | 73 | Light yellow |
| Practice of example 10 | 43 | Colorless and colorless |
| Example 11 | 28 | Colorless and colorless |
| Example 12 | 31 | Colorless and colorless |
As can be seen from the test results of the examples 6 to 12 in Table 2, the chromaticity of the electrolyte is gradually reduced along with the addition of the chromaticity modifier, and the appearance color also tends to be colorless; however, based on the performance requirements of the electrolyte, the chroma modifier can not be added excessively, and the additive amount of the chroma modifier is controlled to be 0.01-2%, and more preferably 0.1-0.5% by combining the color improvement effect.
According to the preparation method of the aluminum capacitor electrolyte, the chroma modifier is added, the adding sequence and the adding temperature of the chroma modifier are limited, the deepening of the solute and the electrolyte can be effectively inhibited, the problem that the color of the electrolyte is deepened and blackened and browned in the high-temperature boiling process of the electrolyte is solved, the color of the electrolyte product is colorless to light yellow, and the decoloring effect is obvious.
The present invention has been further described with reference to specific embodiments, but it should be understood that the specific description herein should not be construed as limiting the spirit and scope of the invention, and that various modifications to the above-described embodiments, which would occur to persons skilled in the art upon reading this description, are within the scope of the invention.
Claims (9)
1. The preparation method of the aluminum capacitor electrolyte is characterized by comprising the following steps:
(1) Heating and stirring a solvent, a solute and a chromaticity modifier uniformly;
(2) Continuously heating and stirring, preserving heat, and cooling to obtain electrolyte;
in the step (1), the heating and stirring temperature is 30-100 ℃.
2. The method for preparing an aluminum capacitor electrolyte as claimed in claim 1, wherein the mass ratio of the solvent to the solute in the step (1) is (0.5-1): 1.
3. The method for preparing an aluminum capacitor electrolyte as claimed in claim 1, wherein the solute in step (1) includes organic acids and/or sugar alcohols.
4. The method of claim 3, wherein the organic acid comprises one or more of suberic acid, azelaic acid, dodecanedioic acid; the sugar alcohol comprises one or more of mannitol, sorbitol and xylitol.
5. The method for preparing an aluminum capacitor electrolyte as claimed in claim 1, wherein the solvent is one or both of ethylene glycol and γ -butyrolactone.
6. The method of claim 1, wherein the color modifier comprises one or more of hypophosphorous acid, ammonium hypophosphite, and phosphite esters.
7. The method for preparing an aluminum capacitor electrolyte as claimed in claim 1, wherein the added amount of the chroma improving agent is 0.01-2% of the solute.
8. The method for preparing an aluminum capacitor electrolyte as claimed in claim 7, wherein the added amount of the colorimetric modifier is 0.1-0.5% by mass of the solute.
9. The method for preparing the aluminum capacitor electrolyte according to claim 1, wherein the stirring temperature and the holding temperature in the step (2) are 120-180 ℃ and the holding time is 1-8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340637.5A CN115148500B (en) | 2021-03-30 | Preparation method of aluminum capacitor electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340637.5A CN115148500B (en) | 2021-03-30 | Preparation method of aluminum capacitor electrolyte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115148500A true CN115148500A (en) | 2022-10-04 |
| CN115148500B CN115148500B (en) | 2024-04-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601799A (en) * | 2003-09-28 | 2005-03-30 | 张家港市国泰华荣化工新材料有限公司 | Method of stabilizing colour of non-aquous electrolyte and lowering HF content |
| CN102013325A (en) * | 2010-09-22 | 2011-04-13 | 湖南省衡阳华高电子有限公司 | Electrolyte of wide-temperature long-life patch aluminium electrolytic capacitor and preparation method thereof |
| CN105895954A (en) * | 2016-05-05 | 2016-08-24 | 东莞市凯欣电池材料有限公司 | High-stability power battery electrolyte |
| WO2020242015A1 (en) * | 2019-05-31 | 2020-12-03 | 에스케이케미칼 주식회사 | Electrolyte solution for secondary battery and secondary battery comprising same |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601799A (en) * | 2003-09-28 | 2005-03-30 | 张家港市国泰华荣化工新材料有限公司 | Method of stabilizing colour of non-aquous electrolyte and lowering HF content |
| CN102013325A (en) * | 2010-09-22 | 2011-04-13 | 湖南省衡阳华高电子有限公司 | Electrolyte of wide-temperature long-life patch aluminium electrolytic capacitor and preparation method thereof |
| CN105895954A (en) * | 2016-05-05 | 2016-08-24 | 东莞市凯欣电池材料有限公司 | High-stability power battery electrolyte |
| WO2020242015A1 (en) * | 2019-05-31 | 2020-12-03 | 에스케이케미칼 주식회사 | Electrolyte solution for secondary battery and secondary battery comprising same |
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