CN103058229A - Application for disodium edetate dehydrate - Google Patents
Application for disodium edetate dehydrate Download PDFInfo
- Publication number
- CN103058229A CN103058229A CN2013100208166A CN201310020816A CN103058229A CN 103058229 A CN103058229 A CN 103058229A CN 2013100208166 A CN2013100208166 A CN 2013100208166A CN 201310020816 A CN201310020816 A CN 201310020816A CN 103058229 A CN103058229 A CN 103058229A
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- CN
- China
- Prior art keywords
- ethylene diamine
- diamine tetraacetate
- disodium ethylene
- wat
- product
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses an application for disodium edetate dehydrate, wherein disodium edetate dehydrate is applied to a process for producing a sodium sulfite product, namely, trace disodium edetate dehydrate is added on the technical basis of keeping the existing process for producing sodium sulfite as an antioxidant; and the disodium edetate dehydrate enables the circulating mother liquor of a production system to be not easy to oxidize, thus improving the purity of the sodium sulfite product, improving the appearance colour of the product, and increasing the added value and the economic benefits of the product.
Description
Technical field
The invention belongs to S-WAT Technology field, be specifically related to a kind of application of disodium ethylene diamine tetraacetate.
Background technology
S-WAT product shows white crystal or powder, density 2.633, soluble in water, be slightly soluble in ethanol.The aqueous solution is alkalescence, has reductibility, reveals to put easily to be oxidized to sodium sulfate and sodium sulphite in the air.Its main application: 1) be used for the regenerated fiber stablizer.2) be used for the fabric bleaching agent.3) be used for photography industry photographic developer.4) food service industry is made sanitas, agent keeping vegetable fresh.5) leather industry.6) mine is as dressing agent.7) chemical industry is produced the hypo raw material as reductive agent.8) introduce sulfo group in the organic synthesis, synthetic dyestuff, pigment.9) also be used in addition paper industry, electroplating industry, foundary industry, pharmaceutical industry, part S-WAT product is as water reducer and environment protection sewage processing etc.
Because S-WAT has reductibility, existing with alkali liquor absorption sulfurous gas technique, the product of its manufacturing processed and circulating mother liquor (feed liquid) are subjected to the impact of temperature and atmospheric oxygen larger, the existence of some metal ion promotes the S-WAT oxidation, thereby be difficult for obtaining highly purified product, also limited S-WAT use range and use field.In view of the S-WAT product performance, the method that adopts production process to add antioxidant prevents the oxidation of S-WAT or reduces its oxidation rate to be best solution.
Summary of the invention
The object of the present invention is to provide a kind of application of disodium ethylene diamine tetraacetate, adding micro-disodium ethylene diamine tetraacetate on the existing production of maintenance S-WAT Technology basis is antioxidant, it can make the production system circulating mother liquor be difficult for oxidation, improve the S-WAT product purity, improve the product appearance color and luster, improve simultaneously S-WAT added value of product and economic benefit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of application of disodium ethylene diamine tetraacetate is applied to disodium ethylene diamine tetraacetate to produce in the S-WAT product process, is antioxidant keeping existing production S-WAT Technology basis to add micro-disodium ethylene diamine tetraacetate namely.
The addition of producing disodium ethylene diamine tetraacetate in the S-WAT product process is 1 * 10 of production systemic circulation mother liquor
-5~ 2 * 10
-4Wt%.
Disodium ethylene diamine tetraacetate also is applicable in the production process of sodium bisulfite, Sodium Pyrosulfite, ammonium sulphite and ammonium bisulfite.
Beneficial effect of the present invention is:
Disodium ethylene diamine tetraacetate can with production system circulating mother liquor (feed liquid) in the reaction of various complexing of metal ion, form the complex compound of solubility, thereby prevent the oxidation of S-WAT or reduce its oxidation rate, obtain high purity product; Even residual minim disodium ethylene diamine tetraacetate composition is arranged in the S-WAT product, also help antioxygenation, delay the S-WAT oxidization time; Because of metal ion and disodium ethylene diamine tetraacetate complex reaction, also improved S-WAT product appearance color and luster simultaneously, product is easy to the user and accepts approval, has increased S-WAT added value of product and economic benefit.
Utilize novel technique, one ton of S-WAT product of every production, production cost only increases by 5 ~ 10 yuan, and production process use disodium ethylene diamine tetraacetate is easy to operate, need not change the technical process of original production S-WAT.
Embodiment
On the S-WAT production line, in the enamel still of evaporation concentration post, add disodium ethylene diamine tetraacetate (pressing S-WAT evaporated liquor weight 0.15 ‰ adds), S-WAT centrifugate recycled, the product quality indicator of its continuous production batch is as follows:
Can find out from tabulation: do not adopt the present invention to produce the disodium ethylene diamine tetraacetate that the S-WAT product process uses, its quantity-produced different batches S-WAT product purity is by batch reduction trend, and the different batches product color is also different; Otherwise when adopting disodium ethylene diamine tetraacetate of the present invention to produce S-WAT, the different batches product purity all surpass 97% and product be identical white color.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. the application of a disodium ethylene diamine tetraacetate, it is characterized in that: disodium ethylene diamine tetraacetate is applied to produce in the S-WAT product process, is antioxidant keeping existing production S-WAT Technology basis to add micro-disodium ethylene diamine tetraacetate namely.
2. the application of disodium ethylene diamine tetraacetate according to claim 1 is characterized in that: the addition of producing disodium ethylene diamine tetraacetate in the S-WAT product process is 1 * 10 of production systemic circulation mother liquor
-5~ 2 * 10
-4Wt%.
3. the application of disodium ethylene diamine tetraacetate according to claim 1 is characterized in that: disodium ethylene diamine tetraacetate also is applicable in the production process of sodium bisulfite, Sodium Pyrosulfite, ammonium sulphite and ammonium bisulfite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100208166A CN103058229A (en) | 2013-01-21 | 2013-01-21 | Application for disodium edetate dehydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100208166A CN103058229A (en) | 2013-01-21 | 2013-01-21 | Application for disodium edetate dehydrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103058229A true CN103058229A (en) | 2013-04-24 |
Family
ID=48101168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100208166A Pending CN103058229A (en) | 2013-01-21 | 2013-01-21 | Application for disodium edetate dehydrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103058229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433026A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | SO (SO)2Adsorbing material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587051A (en) * | 2004-08-30 | 2005-03-02 | 金川集团有限公司 | Process for producing anhydrous sodium sulfite using smelting smoke |
-
2013
- 2013-01-21 CN CN2013100208166A patent/CN103058229A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587051A (en) * | 2004-08-30 | 2005-03-02 | 金川集团有限公司 | Process for producing anhydrous sodium sulfite using smelting smoke |
Non-Patent Citations (2)
| Title |
|---|
| 肖婉娜: "亚硫酸氢钠溶液稳定性的讨论", 《广州化学》 * |
| 韩建多等: "用含二氧化硫废气产生亚硫酸钠", 《无机盐工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433026A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | SO (SO)2Adsorbing material and preparation method thereof |
| CN114433026B (en) * | 2020-10-31 | 2024-02-09 | 中国石油化工股份有限公司 | SO (SO) device 2 Adsorption material and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130424 |