CN102675065A - Method for producing dehydrated sodium formaldehyde sulfoxylate powder - Google Patents
Method for producing dehydrated sodium formaldehyde sulfoxylate powder Download PDFInfo
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- CN102675065A CN102675065A CN2012101612538A CN201210161253A CN102675065A CN 102675065 A CN102675065 A CN 102675065A CN 2012101612538 A CN2012101612538 A CN 2012101612538A CN 201210161253 A CN201210161253 A CN 201210161253A CN 102675065 A CN102675065 A CN 102675065A
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- sodium bisulphite
- bisulphite formaldehyde
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Abstract
The invention discloses a method for producing dehydrated sodium formaldehyde sulfoxylate powder. The dehydrated sodium formaldehyde sulfoxylate powder is obtained by dehydrating sodium formaldehyde sulfoxylate dihydrate powder in vacuum, wherein high vacuum degree is adopted during dehydrating, the vacuum degree is less than or equal to -0.098MPa, and a stabilizer in an amount which is not more than 15 percent of the mass of the sodium formaldehyde sulfoxylate dihydrate powder is added into the prepared dehydrated sodium formaldehyde sulfoxylate powder. The method for producing the dehydrated sodium formaldehyde sulfoxylate powder has the advantages of eliminating the influence of dehydration of crystal water of the conventional dihydrate product, improving the storage stability of the product and meeting the reducer mixing and dyeing technology of the printing and dyeing industry.
Description
Technical field
The present invention relates to a kind of working method of the sodium bisulphite formaldehyde powder that dewaters.
Background technology
Sodium bisulphite formaldehyde is commonly called as rongalite, chemical formula NaHSO
2CH
2O2H
2O is a kind of important chemical feedstocks, and its product appearance form and form are multiple, and bulk, powdery, crystalloid and liquid are arranged.At present the working method of powdery sodium bisulphite formaldehyde has two kinds: a kind of be with the melting attitude sodium bisulphite formaldehyde that evaporation obtains put into the aluminium dish with cold wind cooling caking after; Be crushed to the bulk of 3-5 centimetre of size earlier, further pulverize then, sieve and obtain comminuted powder; Another kind is to be raw material with melting attitude sodium bisulphite formaldehyde directly, adopts that specific alcohols dispersion agent and kneading machine cool off, crystallization production obtains crystal powder.When producing crystal powder, the particle of formation is spherical, smooth surface, and its good stability, the shelf-time is longer.Comminuted powder is because of being Mechanical Crushing, and out-of-shape, surface irregularity, size are uneven, and specific surface area is big, is prone to ingress of air and moisture absorption is decomposed, and the shelf-time is shorter relatively.
But all contain bimolecular crystal water in the powder-like product that the working method of above-mentioned two kinds of powdery sodium bisulphite formaldehydes is produced, under the powder state, very easily dewater after being heated and impel product to decompose.Simultaneously, in the printing and dyeing industry dyeing, the powdery sodium bisulphite formaldehyde can mix use with vat powder under certain conditions.Yet, after vat powder mixes, because the subacidity of sodium formate method vat powder, can cause the trace of powdery sodium bisulphite formaldehyde to decompose and produce the dehydration phenomenon, cause the batch mixing accelerate decompsn smelly, and can not satisfy the batch mixing dyeing with vat powder.
Summary of the invention
Goal of the invention: to the problems referred to above, the purpose of this invention is to provide the working method that a kind of product does not have crystal water, is easy to preserve, can satisfy the dehydration sodium bisulphite formaldehyde powder of printing and dyeing industry batch mixing dyeing.
Technical scheme: a kind of working method of the sodium bisulphite formaldehyde powder that dewaters promptly gets after vacuum hydro-extraction with two hydration sodium bisulphite formaldehyde powders.
Adopt condition of high vacuum degree during the dehydration of two hydration sodium bisulphite formaldehyde powders, vacuum tightness≤-0.098MPa.
In the dehydration sodium bisulphite formaldehyde powder that makes, add stablizer, said stablizer is a soda ash, and its add-on is not higher than 15% of said two hydration sodium bisulphite formaldehyde powder quality.
The working method of above-mentioned a kind of sodium bisulphite formaldehyde powder that dewaters, this method may further comprise the steps:
(1) two hydration sodium bisulphite formaldehyde powders are added in the vacuum drier, vacuum hydro-extraction is carried out in heating, control vacuum tightness≤-0.098MPa, vacuum-drying temperature≤65 ℃, vacuum-drying time≤2 hour;
(2) when vacuum-drying is breasted the tape, temperature of charge is reduced to below 40 ℃, in vacuum drier, add the stablizer thorough mixing again, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product after sieving.
Said two hydration sodium bisulphite formaldehyde powders are crystal powder or comminuted powder.
Adopt rotary-vane vaccum pump during said vacuum drier vacuum hydro-extraction.
The screening plant that sieves adopts rotating screen.
Beneficial effect: compared with prior art; Advantage of the present invention has provided a kind of dehydration sodium bisulphite formaldehyde powder working method; Eliminated the influence that original two hydrated product crystal water dehydration impelling product decomposes; Improve product stock stability, also satisfied the reductive agent batch mixing dyeing of printing dye industry simultaneously.
Embodiment
Below in conjunction with specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Embodiment 1: (1) adds 100 kilograms of sodium bisulphite formaldehyde crystal powders in the vacuum drier; Open rotary-vane vaccum pump then, drive hot water pump vacuum hydro-extraction is carried out in material heating, control vacuum tightness-below the 0.098MPa; 65 ℃ of vacuum-drying temperature, 100 minutes vacuum-drying time;
(2) when vacuum-drying is breasted the tape, temperature of charge is reduced to 40 ℃, in vacuum drier, be incorporated as the soda ash thorough mixing of sodium bisulphite formaldehyde crystal powder quality 2% again, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product after sieving.
Dehydration sodium bisulphite formaldehyde content is 118.80% in the finished product.
Embodiment 2: (1) adds 50 kilograms of sodium bisulphite formaldehyde comminuted powders in the vacuum drier; Open rotary-vane vaccum pump then, drive hot water pump vacuum hydro-extraction is carried out in material heating, control vacuum tightness-below the 0.099MPa; 64 ℃ of vacuum-drying temperature, 110 minutes vacuum-drying time;
(2) when vacuum-drying is breasted the tape, temperature of charge is reduced to 40 ℃, in vacuum drier, be incorporated as the soda ash thorough mixing of sodium bisulphite formaldehyde comminuted powder quality 2% again, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product after sieving.
Dehydration sodium bisulphite formaldehyde content is 116.95% in the finished product.
Embodiment 3: (1) adds 100 kilograms of sodium bisulphite formaldehyde crystal powders in the vacuum drier; Open rotary-vane vaccum pump then, drive hot water pump vacuum hydro-extraction is carried out in material heating, control vacuum tightness-below the 0.099MPa; 63 ℃ of vacuum-drying temperature, 90 minutes vacuum-drying time;
(2) when vacuum-drying is breasted the tape, temperature of charge is reduced to 35 ℃, in vacuum drier, be incorporated as the soda ash thorough mixing of sodium bisulphite formaldehyde crystal powder quality 12% again, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product after sieving.
Dehydration sodium bisulphite formaldehyde content is 102.2% in the finished product.
The dewater determination experiment of sodium bisulphite formaldehyde powder stability of the present invention: get dehydration sodium bisulphite formaldehyde powder by embodiment 1-3 respectively; Press 58.5: 39.0: 2.5 thorough mixing of mass ratio with sodium formate method vat powder, soda ash; Compare with two hydration sodium bisulphite formaldehyde crystal powders, two hydration sodium bisulphite formaldehyde comminuted powders; Placed rate of decomposition separately (in sodium bisulphite formaldehyde) as shown in the table equally at normal temperatures 7 days:
| Sample | Rate of decomposition (%) |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 1 | 2.9 |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 2 | 3.1 |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 3 | 1.2 |
| Two hydration sodium bisulphite formaldehyde crystal powders | 87.0 |
| Two hydration sodium bisulphite formaldehyde comminuted powders | 88.1 |
This shows that the dewater stability of sodium bisulphite formaldehyde powder product of the present invention of embodiment 1-3 obviously improves.
Claims (8)
1. the working method of sodium bisulphite formaldehyde powder of dewatering is characterized in that: promptly get after vacuum hydro-extraction with two hydration sodium bisulphite formaldehyde powders.
2. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1 is characterized in that: adopt condition of high vacuum degree during the dehydration of two hydration sodium bisulphite formaldehyde powders, and vacuum tightness≤-0.098MPa.
3. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1; It is characterized in that: in the dehydration sodium bisulphite formaldehyde powder that makes, add stablizer, the add-on of said stablizer is not higher than 15% of said two hydration sodium bisulphite formaldehyde powder quality.
4. according to the working method of the arbitrary described a kind of sodium bisulphite formaldehyde powder that dewaters of claim 1 to 3, it is characterized in that this method may further comprise the steps:
(1) two hydration sodium bisulphite formaldehyde powders are added in the vacuum drier, vacuum hydro-extraction is carried out in heating, control vacuum tightness≤-0.098MPa, vacuum-drying temperature≤65 ℃, vacuum-drying time≤2 hour;
(2) when vacuum-drying is breasted the tape, temperature of charge is reduced to below 40 ℃, in vacuum drier, add the stablizer thorough mixing again, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product after sieving.
5. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1 is characterized in that: said two hydration sodium bisulphite formaldehyde powders are crystal powder or comminuted powder.
6. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1 is characterized in that: said stablizer is a soda ash.
7. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 4 is characterized in that: adopt rotary-vane vaccum pump during said vacuum drier vacuum hydro-extraction.
8. the working method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 4 is characterized in that: the screening plant that sieves adopts rotating screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161253.8A CN102675065B (en) | 2012-05-23 | 2012-05-23 | Method for producing dehydrated sodium formaldehyde sulfoxylate powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161253.8A CN102675065B (en) | 2012-05-23 | 2012-05-23 | Method for producing dehydrated sodium formaldehyde sulfoxylate powder |
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| CN102675065A true CN102675065A (en) | 2012-09-19 |
| CN102675065B CN102675065B (en) | 2014-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924247A (en) * | 2012-10-31 | 2013-02-13 | 江苏省东泰精细化工有限责任公司 | Rongalite solution stabilizing agent and application thereof in liquid rongalite product production |
| CN104478682A (en) * | 2014-12-30 | 2015-04-01 | 江南大学 | Method for improving stability of rongalite solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557695A (en) * | 2004-02-06 | 2004-12-29 | 吉林市大宇化工有限公司 | Improvement of production method of activating and modifying sodium bisulfoxylate formaldehyde |
| CN101597222A (en) * | 2009-06-15 | 2009-12-09 | 陆焕民 | A kind of rongalite production method |
-
2012
- 2012-05-23 CN CN201210161253.8A patent/CN102675065B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557695A (en) * | 2004-02-06 | 2004-12-29 | 吉林市大宇化工有限公司 | Improvement of production method of activating and modifying sodium bisulfoxylate formaldehyde |
| CN101597222A (en) * | 2009-06-15 | 2009-12-09 | 陆焕民 | A kind of rongalite production method |
Non-Patent Citations (1)
| Title |
|---|
| 田伟军等: "一步法合成次硫酸氢钠甲醛的工艺研究及生产实践", 《现代化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924247A (en) * | 2012-10-31 | 2013-02-13 | 江苏省东泰精细化工有限责任公司 | Rongalite solution stabilizing agent and application thereof in liquid rongalite product production |
| CN104478682A (en) * | 2014-12-30 | 2015-04-01 | 江南大学 | Method for improving stability of rongalite solution |
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| CN102675065B (en) | 2014-03-19 |
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