CN100424005C - Calcium method for producing high efficient bleaching powder - Google Patents
Calcium method for producing high efficient bleaching powder Download PDFInfo
- Publication number
- CN100424005C CN100424005C CNB200510125241XA CN200510125241A CN100424005C CN 100424005 C CN100424005 C CN 100424005C CN B200510125241X A CNB200510125241X A CN B200510125241XA CN 200510125241 A CN200510125241 A CN 200510125241A CN 100424005 C CN100424005 C CN 100424005C
- Authority
- CN
- China
- Prior art keywords
- bleaching powder
- high efficient
- slurries
- calcium
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000007844 bleaching agent Substances 0.000 title claims abstract description 17
- 239000011575 calcium Substances 0.000 title claims abstract description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 15
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 19
- 239000000460 chlorine Substances 0.000 claims description 19
- 229910052801 chlorine Inorganic materials 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000002425 crystallisation Methods 0.000 claims description 8
- 230000008025 crystallization Effects 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 235000015110 jellies Nutrition 0.000 claims description 4
- 239000008274 jelly Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 229910052708 sodium Inorganic materials 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 239000000920 calcium hydroxide Substances 0.000 description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 238000009686 powder production technique Methods 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a new manufacturing method of high-effective bleaching powder through calcium method, which comprises the following steps: allocating slurry; chlorinating; filtering; crystallizing in the vacuum; improving manufacturing and receiving rate; accelerating the dissolving rate without insoluble impurity.
Description
The present invention relates to a kind of method of calcium method for producing high efficient bleaching powder.
High test bleaching powder is a kind of widely used sterilization chlorinated lime, and at present, the production technique of high test bleaching powder has two kinds, i.e. calcium method technology and sodium method technology.Calcium method technology is mixed with the slurries of concentration about 30% with white lime, feeds chlorinated with chlorine, and control reaction temperature is judged reaction end by microscopic examination in the production below 55 ℃, the centrifugal decorating film of telling, drying, packing get final product the high test bleaching powder product.This method is judged reaction end with human eye, and certain error is arranged, and has influence on the high test bleaching powder productive rate.Owing to contain insolubles (calcium hydroxide etc.) and other impurity, the product available chlorine content is low, only about 65%, and dissolution rate is slow.Sodium method high test bleaching powder production technique is from external introduction basically.Add certain density sodium hydroxide during batching in calcium hydroxide slurry, feed chlorine and react, centrifugation goes out the Losantin crystallization, and drying is made finished product.This method product available chlorine content reaches more than 70%, and dissolving is fast, and impurity is few.
The purpose of this invention is to provide a kind of brand-new high test bleaching powder production technique, present method is not used sodium hydroxide, and the product that makes catches up with even surpassed the product of sodium method explained hereafter at aspects such as available chlorine, dissolution rate, foreign matter contents.Compare with traditional calcium method technology, the yield height of present method product, the available chlorine content height, dissolution rate is fast, contains insoluble impurities hardly.With sodium method technology ratio, use present method to filter operation together owing to behind chloride process, having increased, removed the insoluble impurities that raw material lime is brought into, surpassing sodium method product aspect the solvability of product.
The objective of the invention is: calcium method for producing high efficient bleaching powder is characterized in that:
A. join the slurry chloride process:
When driving, in reactor, add the concentration for preparing and be lower than 25% calcium hydroxide slurry, feed chlorine and react, control reaction temperature is below 40 ℃, and with pH value control reaction process, terminal point is pH=10～11, stops logical chlorine, and slurries stir and treat out.
Reaction principle is:
2Ca(OH)
2+2Cl
2＝CaCl
2+Ca(ClO)
2+2H
2O
B. filter operation:
Slurries in the reactor are delivered to filter vat, and suction filtration is removed insolubles and jelly, and filtrate is calcium chloride and Losantin mixed solution.Insolubles influences the quality and the dissolution rate of product, mainly is still unreacted calcium hydroxide, and jelly is the impurity that white lime produces in reaction process.
C. vacuum crystallization operation:
Filtrate is pumped to the vacuum still, and the control temperature of charge vacuumizes below 45 ℃, and keeps high vacuum-0.1MPa to stablize 60min down, and after the crystallization, centrifugal minute rate obtains lower floor and bear the thing Losantin, and drying promptly gets high efficient bleaching powder.The present invention produces high test bleaching powder with existing calcium method and compares, significant improvement is arranged on the technology, and the slurries preparation is adjusted to below 20% from concentration 30%, terminal point control Yi Erzhun, increase and filter operation, changing conventional crystallization process is high vacuum normal temperature crystallization process, and the product available chlorine content rises to more than 75% by about 65%, and, dissolution rate is fast, impurity is few, and it is many to have overcome insoluble impuritiess such as containing calcium hydroxide in the former high test bleaching powder product, dissolves slow defective.The present invention compares with the sodium method, and facility investment is suitable, and product reaches and is better than the sodium method.Available chlorine content all possesses the characteristics that dissolution rate is fast, impurity is few all more than 70%.Be described further we are bright below by embodiment:
Embodiment:
The concentration of slurry that adding 500ml prepares in the 1000ml there-necked flask is 15% calcium hydroxide, feeds chlorine and reacts, and control reaction temperature is below 40 ℃, and with pH value control reaction process, terminal point is pH=10～11, stops logical chlorine, and slurries stir and treat out.
Slurries in the there-necked flask are delivered to B, and suction filtration is removed insolubles and jelly, and filtrate is calcium chloride and Losantin mixed solution, available chlorine content 12.56%.Filtrate is pumped to vacuum unit, and the control temperature of charge vacuumizes below 45 ℃, and keeps high vacuum-0.1MPa to stablize 60min down, and after the crystallization fully, centrifugation obtains the Losantin wet-milling, available chlorine content 43%.Bleaching liquor available chlorine content 9%.After the wet-milling drying, dry powder available chlorine content 76.3% is the product high efficient bleaching powder.Add hydrochloric acid in the bleaching liquor, with Losantin reaction, deviate from chlorine after, content is about 30% calcium chloride solution, it is 93% calcium chloride that drying makes content, recyclable utilization.
Claims (1)
1. the method for a calcium method for producing high efficient bleaching powder is characterized in that:
A. join the slurry chloride process:
When driving, white lime is mixed with concentration less than in 25% the slurries adding reactor, feed chlorine and react, control reaction temperature is lower than 40 ℃, and with pH value control reaction process, terminal point is pH=10～11, stops logical chlorine, and slurries stir and treat out;
B. filter operation:
Slurries in the reactor are delivered to filter vat, and suction filtration is removed insolubles and jelly, and filtrate is calcium chloride and Losantin mixed solution;
C. vacuum crystallization operation:
Filtrate is delivered to the vacuum still, and the control temperature of charge vacuumizes below 45 ℃, and the high vacuum 60min of maintenance-0.1MPa, and after the crystallization, centrifugation gets Losantin, and drying can make high efficient bleaching powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510125241XA CN100424005C (en) | 2005-11-21 | 2005-11-21 | Calcium method for producing high efficient bleaching powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510125241XA CN100424005C (en) | 2005-11-21 | 2005-11-21 | Calcium method for producing high efficient bleaching powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970435A CN1970435A (en) | 2007-05-30 |
| CN100424005C true CN100424005C (en) | 2008-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510125241XA Active CN100424005C (en) | 2005-11-21 | 2005-11-21 | Calcium method for producing high efficient bleaching powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424005C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743516A (en) * | 2015-03-31 | 2015-07-01 | 陈益铭 | Rotary kiln production method and equipment for bleaching powder product |
| CN112174093B (en) * | 2020-09-30 | 2022-07-08 | 河南神马氯碱发展有限责任公司 | Method for producing bleaching powder by using carbide slag |
| CN112374465A (en) * | 2020-12-02 | 2021-02-19 | 中国成达工程有限公司 | System and method for recycling calcium hypochlorite from waste mother liquor of calcium bleaching powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1544708A1 (en) * | 1987-12-21 | 1990-02-23 | Всесоюзный научно-исследовательский и проектный институт титана | Method of producing clarified solution of calcium hydrochloride |
| CN1019650B (en) * | 1990-03-19 | 1992-12-30 | 海尔蒂股份有限公司 | Device for hammering fastening elements into hard material |
| JPH05155604A (en) * | 1991-12-05 | 1993-06-22 | Nippon Soda Co Ltd | Production of calcium hypochlorite |
| CN1198403A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Technological process of calcium method producing bleaching powder extract |
| CN1198402A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Telchnological process of sodium method producing bleaching powder extract |
-
2005
- 2005-11-21 CN CNB200510125241XA patent/CN100424005C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1544708A1 (en) * | 1987-12-21 | 1990-02-23 | Всесоюзный научно-исследовательский и проектный институт титана | Method of producing clarified solution of calcium hydrochloride |
| CN1019650B (en) * | 1990-03-19 | 1992-12-30 | 海尔蒂股份有限公司 | Device for hammering fastening elements into hard material |
| JPH05155604A (en) * | 1991-12-05 | 1993-06-22 | Nippon Soda Co Ltd | Production of calcium hypochlorite |
| CN1198403A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Technological process of calcium method producing bleaching powder extract |
| CN1198402A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Telchnological process of sodium method producing bleaching powder extract |
Non-Patent Citations (4)
| Title |
|---|
| 漂白粉及其生产技术. 王欣荣.氯碱工业，第3期. 2003 |
| 漂白粉及其生产技术. 王欣荣.氯碱工业，第3期. 2003 * |
| 石灰乳液对次氯酸钙漂液制备的影响. 王齐，吴学栋.纸和造纸，第3期. 2003 |
| 石灰乳液对次氯酸钙漂液制备的影响. 王齐，吴学栋.纸和造纸，第3期. 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1970435A (en) | 2007-05-30 |
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| C14 | Grant of patent or utility model | ||
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Application publication date: 20070530 Assignee: Jiangsu Sopo Chemical Co.,Ltd. Assignor: JIANGSU SOPO (Group) Co.,Ltd. Contract record no.: 2014320000203 Denomination of invention: Calcium method for producing high efficient bleaching powder Granted publication date: 20081008 License type: Exclusive License Record date: 20140311 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: Production of high-efficiency bleaching powder by calcium method Effective date of registration: 20231222 Granted publication date: 20081008 Pledgee: Bank of Jiangsu Limited by Share Ltd. Zhenjiang branch Pledgor: JIANGSU SOPO (Group) Co.,Ltd. Registration number: Y2023980073120 |