CN1288086C - Method for preparing polyaluminium chloride through catalyst of deposed molecular sieve - Google Patents
Method for preparing polyaluminium chloride through catalyst of deposed molecular sieve Download PDFInfo
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- CN1288086C CN1288086C CN 200510046121 CN200510046121A CN1288086C CN 1288086 C CN1288086 C CN 1288086C CN 200510046121 CN200510046121 CN 200510046121 CN 200510046121 A CN200510046121 A CN 200510046121A CN 1288086 C CN1288086 C CN 1288086C
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Abstract
The present invention discloses a method for preparing polyaluminium chloride by using waste molecular sieve catalysts, which comprises the technologic steps: technologic step A, hydrochloric acid is added in waste molecular sieve catalysts which are treated by catalytic cracking in an oil plant to prepare an aluminium chloride solution; technologic step B, the basicity is roughly adjusted by adding calcium aluminate in the aluminium chloride solution; technologic step C, the basicity of the product is adjusted by adding calcium carbonate in polyaluminium chloride with low basicity, and thus, polyaluminium chloride with high basicity can be obtained after curing. The production period is short, and one production period only needs three to seven hours. The aluminium content of the product is high. When the calcium aluminate is added to roughly adjust the basicity, partial aluminium in the calcium aluminate is dissolved out, and the aluminium content in the product can be increased. With the adoption of the method of adjusting the basicity in two steps, the adjustable range of the basicity of the product can be from 60 to 85%. The polyaluminium chloride produced by the present invention has the advantages of simple technology and low production cost; waste materials can utilized, wastes are recovered by wastes, and the wastes are changed into valuables; thus, the present invention has obvious economical and social benefits.
Description
Technical field:
The present invention relates to production method with preparing polyaluminium chloride through catalyst of deposed molecular sieve.Belong to and utilize the refinery deposed molecular sieve to prepare the inorganic polymer flocculant technical field.
Background technology:
Polymerize aluminum chloride also claims aluminium chlorohydroxide.Being the good inorganic polymer flocculant of a kind of purifying water effect, is one of most widely used general, the most salable flocculation agent in the current engineering of water treatment.Its general formula is [Al
2(OH)
nCl
6-n]
m1≤n in the formula≤5, m≤10.It is compared with traditional flocculant, and polymerize aluminum chloride has flco, and to form speed fast, and sedimentation speed is fast, and wide accommodation can obviously improve water purification usefulness, reduces dosage, reduces characteristics such as running cost.In addition, polymerize aluminum chloride also can be used for fields such as papermaking, precision casting, the senior skin of tanning, concrete rapid hardening.
Deposed molecular sieve is the discarded catalyzer that the activity that produces in catalytic cracking process of refinery reduces.Wherein aluminium sesquioxide content is approximately 40～50%, and silicon-dioxide is 30～35%.Aluminium sesquioxide in the application deposed molecular sieve prepares polymerize aluminum chloride and can realize utilization of waste material, and the treatment of wastes with processes of wastes against one another is turned waste into wealth, and has the double meaning of economy and environmental protection.
China Patent No. ZL90103195.X discloses a kind of with spent catalyst system basic aluminum chloride purified agent method, directly acid is molten with 1.0-2.0 (Al/Hcl) equivalence ratio to it is characterized in that using catalytic cracking spent catalyst and hydrochloric acid, produce the low base degree aluminium chlorohydroxide liquid of base degree at 5-8%, then with low base degree aluminium chlorohydroxide liquid of part and sodium hydroxide reaction, produce gel aluminium hydroxide, PH was 6.0 when reaction finished, base degree with the low base degree aluminium chlorohydroxide of gel aluminium hydroxide adjustment, slaking, drying can make the solid aluminium chlorohydroxide.Production cost is higher.Chinese patent publication number CN1394816A discloses a kind of flocculation agent and production method, and a kind of production method of flocculation agent is characterized in that it comprises that following processing step: a. adopts the spent catalyst of refinery catalytic cracking to add hydrochloric acid reaction, produces aluminum chloride; B. sodium hydroxide is mixed stirring after the back adds aluminum chloride liquid adjustment pH value with yellow soda ash, promptly get flocculation agent after the slaking.Though its significant advantage is: the material of input all enters product, no waste sludge discharge.But its production cycle is oversize, and only slaking reaction just needs 24～72 hours, and production efficiency is low, and production cost is higher.
Summary of the invention:
The present invention discloses and a kind ofly produces the method for polymerize aluminum chloride with catalyst of deposed molecular sieve, and its processing step is as follows:
A. adopt the catalyst of deposed molecular sieve adding hydrochloric acid reaction of refinery catalytic cracking to produce aluminum chloride.
B. in liquor alumini chloridi, add calcium aluminate coarse adjustment basicity.
C. add lime carbonate in the polymerize aluminum chloride of low basicity, adjust the basicity of product, slaking gets high basicity polymerize aluminum chloride product.
This method is carried out acidleach with the aluminium salt component in the deposed molecular sieve with hydrochloric acid, adds calcium aluminate, lime carbonate adjustment basicity, and slaking gets the polymerize aluminum chloride product then.Products obtained therefrom aluminium sesquioxide content is 9～12%, and basicity is 60～85%.
In the described method processing step of producing polymerize aluminum chloride with catalyst of deposed molecular sieve, the part by weight that its catalyst of deposed molecular sieve adds hydrochloric acid is 1: 2.5～3.5 (W/W), and concentration of hydrochloric acid is 15～25%.
In the described method processing step of producing polymerize aluminum chloride with catalyst of deposed molecular sieve, it is 2～4 hours that its catalyst of deposed molecular sieve adds hydrochloric acid reaction time, and temperature of reaction is 100～120 ℃.
In the described method processing step of producing polymerize aluminum chloride with catalyst of deposed molecular sieve, it adds calcium aluminate and accounts for 25～35% of catalyst of deposed molecular sieve weight, and the coarse adjustment basicity time is 0.5～1 hour, and temperature is 100～120 ℃.
In the described method processing step of producing polymerize aluminum chloride with catalyst of deposed molecular sieve, it adds lime carbonate and accounts for 25～40% of catalyst of deposed molecular sieve weight, adjust final basicity, and carry out maturation process, curing time is 0.5～2 hour, curing temperature is 50～80 ℃, gets the finished product polymerize aluminum chloride after the slaking.
The invention has the beneficial effects as follows: the production cycle is shorter, production cycle only needed get final product in 3～7 hours product.Product aluminium content height, when adding calcium aluminate coarse adjustment basicity, the part aluminium in the stripping calcium aluminate has improved the aluminium content of the finished product.Adopt the method for the whole basicity of two steps, make that product basicity variable range is wide from 60～85%.The polymerize aluminum chloride that the present invention produces, technology is simple, and production cost is low, makes refuse obtain utilizing, and the treatment of wastes with processes of wastes against one another is turned waste into wealth, and has remarkable economical and social benefit.
Embodiment:
Get catalyst of deposed molecular sieve 80 grams, 20% hydrochloric acid, 250 grams add in the reactor reflux 2.5 hours simultaneously.Added calcium aluminate powder 26 gram heating reflux reactions 0.5 hour in container, reaction finishes after-filtration.Filtrate is poured in the slaking reaction device, in filtrate, add Paris white 25 grams, kept 65 ℃ of slaking reactions 1 hour, get the finished product.Product aluminium sesquioxide content is 10.5%, and basicity is 75% all to meet national standard.
Claims (10)
1. method with preparing polyaluminium chloride through catalyst of deposed molecular sieve, its processing step comprises that A. adopts the catalyst of deposed molecular sieve of refinery catalytic cracking to add hydrochloric acid reaction and produces liquor alumini chloridi, it is characterized in that: processing step B. adds calcium aluminate coarse adjustment basicity in liquor alumini chloridi after, in the polymerize aluminum chloride of low basicity, add lime carbonate through processing step C., adjust the basicity of product, slaking gets high basicity polymerize aluminum chloride.
2. according to the described a kind of method of claim 1 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: when processing step A. adopts the catalyst of deposed molecular sieve adding hydrochloric acid reaction of refinery catalytic cracking to produce liquor alumini chloridi, the part by weight that its catalyst of deposed molecular sieve adds hydrochloric acid is 1: 2.5～3.5, and concentration of hydrochloric acid is 15～25%.
3. according to the described a kind of method with preparing polyaluminium chloride through catalyst of deposed molecular sieve of claim 2, it is characterized in that: it is 2～4 hours that its catalyst of deposed molecular sieve adds the hydrochloric acid reaction time, and temperature of reaction is 100～120 ℃.
4. according to the described a kind of method of claim 1 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step B. adds calcium aluminate coarse adjustment basicity in liquor alumini chloridi, it adds calcium aluminate and accounts for 25～35% of catalyst of deposed molecular sieve weight, the coarse adjustment basicity time is 0.5～1 hour, and temperature is 100～120 ℃.
5. according to the described a kind of method of claim 1 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step C. adds lime carbonate in the polymerize aluminum chloride of low basicity, adjust the basicity of product, slaking gets high basicity polymerize aluminum chloride, it adds lime carbonate and accounts for 25～40% of catalyst of deposed molecular sieve weight, curing time is 0.5～2 hour, and curing temperature is 50～80 ℃.
6. according to claim 2 or 3 or 4 described a kind of methods with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step C. adds lime carbonate in the polymerize aluminum chloride of low basicity, adjust the basicity of product, slaking gets high basicity polymerize aluminum chloride, it adds lime carbonate and accounts for 25～40% of catalyst of deposed molecular sieve weight, curing time is 0.5～2 hour, and curing temperature is 50～80 ℃.
7. according to the described a kind of method of claim 2 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step B. adds calcium aluminate coarse adjustment basicity in liquor alumini chloridi, it adds calcium aluminate and accounts for 25～35% of catalyst of deposed molecular sieve weight, the coarse adjustment basicity time is 0.5～1 hour, and temperature is 100～120 ℃.
8. according to the described a kind of method of claim 3 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step B. adds calcium aluminate coarse adjustment basicity in liquor alumini chloridi, it adds calcium aluminate and accounts for 25～35% of catalyst of deposed molecular sieve weight, the coarse adjustment basicity time is 0.5～1 hour, and temperature is 100～120 ℃.
9. according to the described a kind of method of claim 5 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: when processing step A. adopts the catalyst of deposed molecular sieve adding hydrochloric acid reaction of refinery catalytic cracking to produce liquor alumini chloridi, the part by weight that its catalyst of deposed molecular sieve adds hydrochloric acid is 1: 2.5～3.5, and concentration of hydrochloric acid is 15～25%.
10. according to the described a kind of method of claim 3 with preparing polyaluminium chloride through catalyst of deposed molecular sieve, it is characterized in that: processing step B. adds calcium aluminate coarse adjustment basicity in liquor alumini chloridi, it adds calcium aluminate and accounts for 25～35% of catalyst of deposed molecular sieve weight, the coarse adjustment basicity time is 0.5～1 hour, temperature is 100～120 ℃, processing step C. adds lime carbonate in the polymerize aluminum chloride of low basicity, adjust the basicity of product, slaking gets high basicity polymerize aluminum chloride, it adds lime carbonate and accounts for 25～40% of catalyst of deposed molecular sieve weight, curing time is 0.5～2 hour, and curing temperature is 50～80 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104928475B (en) * | 2014-03-17 | 2018-03-20 | 有研稀土新材料股份有限公司 | A kind of recovery method of the aluminium scrap silicon containing rare earth |
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| CN103771422B (en) * | 2012-10-17 | 2016-01-13 | 湖南理工学院 | A kind of oil refining waste catalyst combines the method preparing white carbon black and polymerization aluminum chloride |
| CN105271332B (en) * | 2015-10-22 | 2016-12-07 | 中海油天津化工研究设计院有限公司 | A kind of method preparing sial composite oxides for raw material with discarded Si-Al molecular sieve |
| WO2017168729A1 (en) * | 2016-03-31 | 2017-10-05 | 朝日化学工業株式会社 | Highly basic aluminum chloride and method for producing same |
| CN108059179A (en) * | 2017-12-27 | 2018-05-22 | 武汉理工大学 | A kind of method for preparing PAC from the recycling of FCC dead catalyst acid system |
| CN108264113B (en) * | 2018-03-29 | 2021-05-04 | 武汉理工大学 | Method for preparing high-efficiency PAFC dye water purifying agent from FCC spent catalyst |
| JP6845195B2 (en) * | 2018-09-26 | 2021-03-17 | 朝日化学工業株式会社 | Highly basic aluminum chloride |
| CN110540281B (en) * | 2019-10-12 | 2020-06-02 | 广东华锋碧江环保科技有限公司 | Flocculating agent and preparation method thereof |
| CN110963517A (en) * | 2019-12-17 | 2020-04-07 | 张家港洁利环保科技有限公司 | Method for producing polyaluminum chloride by using aluminum-containing waste acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928475B (en) * | 2014-03-17 | 2018-03-20 | 有研稀土新材料股份有限公司 | A kind of recovery method of the aluminium scrap silicon containing rare earth |
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Assignee: Shenyang Institute of China Coal Research Institute Assignor: Fushun Branch of Coal Sciences Central Research Institute Contract fulfillment period: 2009.4.13 to 2025.3.29 contract change Contract record no.: 2009210000129 Denomination of invention: Method for preparing polyaluminium chloride through catalyst of deposed molecular sieve Granted publication date: 20061206 License type: Exclusive license Record date: 2009.4.14 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.13 TO 2025.3.29; CHANGE OF CONTRACT Name of requester: CHINA COAL RESEARCH INSTITUTE SHENYANG RESEARCH IN Effective date: 20090414 |