CN1970436A - Calcium method for producing high efficient bleaching powder - Google Patents
Calcium method for producing high efficient bleaching powder Download PDFInfo
- Publication number
- CN1970436A CN1970436A CNA2005101252424A CN200510125242A CN1970436A CN 1970436 A CN1970436 A CN 1970436A CN A2005101252424 A CNA2005101252424 A CN A2005101252424A CN 200510125242 A CN200510125242 A CN 200510125242A CN 1970436 A CN1970436 A CN 1970436A
- Authority
- CN
- China
- Prior art keywords
- calcium
- bleaching powder
- slurries
- high efficient
- calcium chloride
- 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.)
- Granted
Links
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000007844 bleaching agent Substances 0.000 title claims abstract description 18
- 239000011575 calcium Substances 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 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
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 18
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 27
- 239000000460 chlorine Substances 0.000 claims description 27
- 229910052801 chlorine Inorganic materials 0.000 claims description 27
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 22
- 239000001110 calcium chloride Substances 0.000 claims description 19
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 16
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 12
- 239000000920 calcium hydroxide Substances 0.000 claims description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 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
- 239000000843 powder Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 235000015110 jellies Nutrition 0.000 claims description 3
- 239000008274 jelly Substances 0.000 claims description 3
- 238000005185 salting out Methods 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000000967 suction filtration Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 15
- 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 9
- 239000011734 sodium Substances 0.000 description 9
- 229910052708 sodium Inorganic materials 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000004061 bleaching Methods 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- 238000001238 wet grinding Methods 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 2
- 238000009686 powder production technique Methods 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Coloring Foods And Improving Nutritive Qualities (AREA)
- Seasonings (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 novel 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 (calcium hydroxide), feeds chlorinated with chlorine, control reaction temperature is below 55 ℃, judge reaction end by microscopic examination in the production, 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 50 ℃,, with pH value control reaction process, terminal point is pH=10～11, stops logical chlorine, the slurries stirring is treated 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 that the impurity such as Si, Mg in the white lime (calcium hydroxide) produce in reaction process.
C. salting-out procedures:
With filtrate the delivering to groove of saltouing, the control temperature of charge adds a certain amount of calcium chloride powder below 45 ℃, stirs, and leaves standstill 30min.Centrifugal telling separated out 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 25% from concentration 30%, adopts pH meter control terminal point, terminal point control Yi Erzhun, increase and filter operation, effectively removed impurity, the product available chlorine content rises to more than 75% by about 65%, and, dissolution rate is fast, 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%.Contain calcium chloride, sodium oxide and Losantin in the sodium method technology by-product bleaching liquor, the composition more complicated is handled and is utilized relatively difficulty again.Only contain calcium chloride and Losantin in present method by-product bleaching liquor, add hydrochloric acid, with the Losantin reaction, deviate from chlorine after, can get content and be about 30% calcium chloride solution, the spray-dried calcium chloride that makes is for saltouing usefulness.Compare with sodium method technology, present method does not have waste liquid, is a kind of production technique of cleaning.
Be described further we are bright below by embodiment:
Embodiment one: trial production
When driving, in the chlorination reaction still, add 5m
3The concentration of slurry for preparing is 15% calcium hydroxide, feeds chlorine and reacts, and control reaction temperature is below 50 ℃, and with pH value control reaction process, terminal point is pH10～11, stops logical chlorine, and slurries stir and treat out.
With the filter impurity screening of the slurries in the reactor, get filtrate.Available chlorine content is 13.24% in the filtrate, and the calcium chloride mass content is 9.64%.Get 4m
3Filtrate the delivering to groove of saltouing, 30 ℃～45 ℃ of control temperature of charge add the calcium chloride powder of 1200kg, stir, and leave standstill 30min.Get Losantin wet-milling 477.0kg, wet-milling available chlorine content 47.52%, calcium chloride content 2.6% with the press filtration of plate vertebra pressure filter.Drying promptly gets high efficient bleaching powder.Available chlorine content 83.15% in the finished product, calcium chloride content 6.16%, calcium hydroxide content 2.6%.Available chlorine content 6.8% in the bleaching liquor, calcium chloride content 27.68%.Add hydrochloric acid in the bleaching liquor, with Losantin reaction, deviate from chlorine after, content is about 30% calcium chloride solution, the spray-dried calcium chloride that makes content 93% returns salting-out procedures and recycles.
Embodiment two: lab scale
Prepare concentration of slurry in advance and be 15% calcium hydroxide, add 500ml in the there-necked flask of 1000ml, stir and feed chlorine down, control reaction temperature is below 50 ℃, and with pH value control reaction process, terminal point is pH=10～11, stop logical chlorine, slurries stir and treat out.
Slurries are moved into the separatory pan filter, get filtrate.Available chlorine content is 13.28% in the filtrate, and the calcium chloride mass content is 9.60%.Get 400ml filtrate in the 1000ml beaker, 30 ℃～45 ℃ of control temperature of charge, the calcium chloride powder of adding 120g stirs, and leaves standstill 30min.Get Losantin wet-milling 47.90g, wet-milling available chlorine content 47.80%, calcium chloride content 2.5% with vacuum filtration.Drying promptly gets high efficient bleaching powder.Available chlorine content 83.40% in the finished product, calcium chloride content 6.08%, calcium hydroxide content 5.66%.Available chlorine content 6.7% in the bleaching liquor, calcium chloride content 27.76%.Bleaching liquor moves in the flask and adds hydrochloric acid, with the Losantin reaction, deviate from chlorine after, content is about 30% calcium chloride solution, drying makes the calcium chloride of content 93%, recycles for saltouing.
Claims (1)
1, calcium method for producing high efficient bleaching powder () is characterized in that:
A. join the slurry chloride process:
When driving, with white lime (calcium hydroxide), be mixed with concentration less than in 25% the slurries adding reactor,, feeding chlorine and react, control reaction temperature is lower than 50 ℃, and with pH value control reaction process, terminal point is pH=10～11.Stop logical chlorine, 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. salting-out procedures:
With filtrate the delivering to groove of saltouing, the control temperature of charge adds a certain amount of calcium chloride powder below 50 ℃, stirs, and leaves standstill
30Min, centrifugation gets Losantin, and drying can make high efficient bleaching powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101252424A CN100424006C (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 |
|---|---|---|---|
| CNB2005101252424A CN100424006C (en) | 2005-11-21 | 2005-11-21 | Calcium method for producing high efficient bleaching powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970436A true CN1970436A (en) | 2007-05-30 |
| CN100424006C CN100424006C (en) | 2008-10-08 |
Family
ID=38111495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101252424A Active CN100424006C (en) | 2005-11-21 | 2005-11-21 | Calcium method for producing high efficient bleaching powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424006C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040198A (en) * | 2010-11-30 | 2011-05-04 | 天津市鑫泽精细化工有限责任公司 | Process flow for producing calcium hypochlorite |
| CN103663379A (en) * | 2013-12-24 | 2014-03-26 | 滨州坤宝化工有限责任公司 | Method for producing calcium hypochlorite by aluminium trichloride production waste gas |
| 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 |
Family Cites Families (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 |
| DE4008750A1 (en) * | 1990-03-19 | 1991-09-26 | Hilti Ag | Fixing device-driving tool - incorporates rotary drill and bolt-setting mechanism |
| JP3640677B2 (en) * | 1991-12-05 | 2005-04-20 | 日本曹達株式会社 | Production method of calcium hypochlorite |
| CN1047573C (en) * | 1997-05-04 | 1999-12-22 | 王振文 | Telchnological process of sodium method producing bleaching powder extract |
| CN1058943C (en) * | 1997-05-04 | 2000-11-29 | 王振文 | Technological process of calcium method producing bleaching powder extract |
-
2005
- 2005-11-21 CN CNB2005101252424A patent/CN100424006C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040198A (en) * | 2010-11-30 | 2011-05-04 | 天津市鑫泽精细化工有限责任公司 | Process flow for producing calcium hypochlorite |
| CN103663379A (en) * | 2013-12-24 | 2014-03-26 | 滨州坤宝化工有限责任公司 | Method for producing calcium hypochlorite by aluminium trichloride production waste gas |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100424006C (en) | 2008-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
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 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |