CN107973320A - Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method - Google Patents

Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method Download PDF

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Publication number
CN107973320A
CN107973320A CN201711249198.7A CN201711249198A CN107973320A CN 107973320 A CN107973320 A CN 107973320A CN 201711249198 A CN201711249198 A CN 201711249198A CN 107973320 A CN107973320 A CN 107973320A
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CN
China
Prior art keywords
waste
sulfuric acid
ammonia
waste sulfuric
ammonia liquor
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.)
Pending
Application number
CN201711249198.7A
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Chinese (zh)
Inventor
邹国华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PANZIHUA STEEL XINYU CHEMICAL CO Ltd
Original Assignee
PANZIHUA STEEL XINYU CHEMICAL CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PANZIHUA STEEL XINYU CHEMICAL CO Ltd filed Critical PANZIHUA STEEL XINYU CHEMICAL CO Ltd
Priority to CN201711249198.7A priority Critical patent/CN107973320A/en
Publication of CN107973320A publication Critical patent/CN107973320A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00Ammonia; Compounds thereof
    • C01C1/24Sulfates of ammonium
    • C01C1/242Preparation from ammonia and sulfuric acid or sulfur trioxide
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00Ammonia; Compounds thereof
    • C01C1/02Preparation, purification or separation of ammonia
    • C01C1/10Separation of ammonia from ammonia liquors, e.g. gas liquors

Abstract

The invention belongs to technical field of chlor-alkali industry, and in particular to a kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method.It is of high cost for existing recycling chlorine industry Waste Sulfuric Acid by the way of lime is added, the problem of other impurities pollute environment is produced, the present invention provides a kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, comprises the following steps:A, waste ammonia liquor is placed in closed container, adjusts pH to 9.5~10.5 with alkali, heating ammonium hydroxide makes Ammonia valatilization, collects gaseous ammonia, until being come out without Ammonia valatilization;B, ammonia obtained by step a is transferred in the container equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, and the complete ammonia of unreacted is collected again, is transferred in another container equipped with Waste Sulfuric Acid and is reacted.The comprehensive reutilization for realizing Waste Sulfuric Acid and waste ammonia liquor that can be easy of the invention, not only reduces the processing cost of Waste Sulfuric Acid, waste ammonia liquor, also efficiently solves the problems, such as to arrange pollution on the environment outside sulfate radical, environmental benefit, social benefit are obvious.

Description

Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method
Technical field
The invention belongs to technical field of chlor-alkali industry, and in particular to a kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization side Method.
Background technology
During production of chlor-alkali chemical industry, often producing 1 ton of alkali needs to consume 98% concentrated sulfuric acids of about 15kg, in the process The Waste Sulfuric Acid of about 20kg 75% or so can be produced, since industrial waste sulfuric acid concentration is low, it is impossible to be directly used in chlorine industry, it is necessary to Recycling.50,000 tons of ion film caustic soda lines of Pan Gang group companies produce about 1000 tons of Waste Sulfuric Acid per year, and output is big.The spent acid of generation Bulk deposition, pollutes environment.The Waste Sulfuric Acid produced at present is mainly handled by being added into spent acid in lime with mode, at this Reason mode is not only of high cost, also produces substantial amounts of calcium sulfate discarded object, it is impossible to effectively recycle sulfuric acid.
The content of the invention
The technical problem to be solved in the present invention is:Existing recycling chlorine industry Waste Sulfuric Acid is by the way of lime is added, cost Height, produces the problem of other impurities pollute environment.
The present invention solve above-mentioned technical problem technical solution be:A kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization is provided Method, to realize comprehensive utilization of resources, reduces environmental pollution.
The present invention provides a kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, comprises the following steps:
A, waste ammonia liquor is placed in closed container, adjusts pH to 9.5~10.5 with alkali, heating ammonium hydroxide makes Ammonia valatilization, receives Collect gaseous ammonia, until being come out without Ammonia valatilization;
B, ammonia obtained by step a is transferred in the container equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, not The ammonia reacted is collected again, is transferred in another container equipped with Waste Sulfuric Acid and is reacted.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, waste ammonia liquor described in step a for concentration >= 8% ammonium hydroxide.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, heating-up temperature described in step a is 80~90 ℃。
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, alkali described in step a is sodium hydroxide.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, the Waste Sulfuric Acid described in step b is chlor-alkali work Industry accessory substance, concentration are 75~80%.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, the temperature reacted described in step b for 50~ 60℃。
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, reaction described in step b is carried out to pH value of solution Untill value 7~8.
Beneficial effects of the present invention are:
The comprehensive reutilization for realizing Waste Sulfuric Acid and waste ammonia liquor that can be easy of the invention, not only reduces Waste Sulfuric Acid, useless ammonia The processing cost of water, also efficiently solves the problems, such as to arrange pollution on the environment outside sulfate radical, environmental benefit, social benefit are bright It is aobvious.The recycling of Waste Sulfuric Acid, waste ammonia liquor of the method for the present invention suitable for the industry productions such as chlorine industry, titanium dioxide, coking of coal Processing.
Embodiment
The present invention provides a kind of Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, comprise the following steps:
A, waste ammonia liquor is placed in closed container, adjusts pH to 9.5~10.5 with alkali, heating ammonium hydroxide makes Ammonia valatilization, receives Collect gaseous ammonia, until being come out without Ammonia valatilization;
B, ammonia obtained by step a is transferred in the container equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, not The ammonia reacted is collected again, is transferred in another container equipped with Waste Sulfuric Acid and is reacted.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, the concentration of the waste ammonia liquor described in step a is >=8%.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, heating-up temperature described in step a is 80~90 ℃。
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, alkali described in step a is sodium hydroxide.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, the Waste Sulfuric Acid described in step b is chlor-alkali work Industry accessory substance, concentration are 75~80%.
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, the temperature reacted described in step b for 50~ 60℃。
Wherein, in above-mentioned Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, reaction described in step b is carried out to pH value of solution Untill value 7~8.
Explanation is further explained to the embodiment of the present invention below in conjunction with embodiment, but is not indicated that this The protection domain of invention is limited in described in embodiment in scope.
The concentration of waste ammonia liquor used is >=8% in embodiment, and Waste Sulfuric Acid be chlorine industry accessory substance, concentration is 75~ 80%, remaining product is ordinary commercial products.
Embodiment 1 the method for the present invention comprehensive reutilization Waste Sulfuric Acid and waste ammonia liquor
Specific operating process is as follows:
A, waste ammonia liquor is placed in closed container a, adjusts pH to 9.5 with alkali, be then heated to 80 DEG C, allow and be dissolved in water Ammonia valatilization come out, collect use;
B, ammonia obtained by step A to be sent into the container b equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, The ammonia for having neither part nor lot in reaction further collects use;The temperature of the reaction is 50 DEG C;
C, the ammonia that step B is not fully absorbed is further introduced into the container c equipped with Waste Sulfuric Acid further by pipeline Absorb extracting sulfuric acid ammonium crystal;
D, by step B and C obtained by ammonia sulfate crystal, it is directly outer as commodity after horizontal centrifuge separating and dehydrating Sell.
Embodiment 2 the method for the present invention comprehensive reutilization Waste Sulfuric Acid and waste ammonia liquor
Specific operating process is as follows:
A, waste ammonia liquor is placed in closed container a, adjusts pH to 10.5 with alkali, be then heated to 90 DEG C, allow and be dissolved in water In Ammonia valatilization come out, collect use;
B, ammonia obtained by step A to be sent into the container b equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, The ammonia for having neither part nor lot in reaction further collects use;The temperature of the reaction is 60 DEG C;
C, the ammonia that step B is not fully absorbed is further introduced into the container c equipped with Waste Sulfuric Acid further by pipeline Absorb extracting sulfuric acid ammonium crystal;
D, by step B and C obtained by ammonia sulfate crystal, it is directly outer as commodity after horizontal centrifuge separating and dehydrating Sell.
Using the method for the present invention recycling Waste Sulfuric Acid and waste ammonia liquor in embodiment, organic efficiency is high, and Waste Sulfuric Acid is very Recycling, Ammonia recovery rate is up to more than 80%.The ammonium sulfate of generation can be used directly as raw material for precipitation agent, and the present invention returns The method that the cost of processing Waste Sulfuric Acid and waste ammonia liquor is low, is handled respectively compared to existing addition lime and hydrochloric acid is received, production can be saved 560 yuan/ton of cost, has obvious economic benefit.

Claims (7)

1. Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method, it is characterised in that comprise the following steps:
A, waste ammonia liquor is placed in closed container, adjusts pH to 9.5~10.5 with alkali, heating ammonium hydroxide makes Ammonia valatilization, collects gas The ammonia of state, until being come out without Ammonia valatilization;
B, ammonia obtained by step a is transferred in the container equipped with Waste Sulfuric Acid by pipeline, reaction obtains ammonia sulfate crystal, unreacted Complete ammonia is collected again, is transferred in another container equipped with Waste Sulfuric Acid and is reacted.
2. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step a The waste ammonia liquor stated is the ammonium hydroxide of concentration >=8%.
3. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step a Heating-up temperature is stated as 80~90 DEG C.
4. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step a It is sodium hydroxide to state alkali.
5. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step b The Waste Sulfuric Acid stated is chlorine industry accessory substance, and concentration is 75~80%.
6. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step b The temperature for stating reaction is 50~60 DEG C.
7. Waste Sulfuric Acid according to claim 1 and waste ammonia liquor comprehensive reutilization method, it is characterised in that:Institute in step b Reaction is stated to carry out untill solution ph 7~8.
CN201711249198.7A 2017-12-01 2017-12-01 Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method Pending CN107973320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711249198.7A CN107973320A (en) 2017-12-01 2017-12-01 Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method

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CN201711249198.7A CN107973320A (en) 2017-12-01 2017-12-01 Waste Sulfuric Acid and waste ammonia liquor comprehensive reutilization method

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Publication Number Publication Date
CN107973320A true CN107973320A (en) 2018-05-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112717455A (en) * 2020-12-14 2021-04-30 安徽国星生物化学有限公司 Rectification separation device and method for 2-cyanopyridine bottom material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1172070A (en) * 1997-07-11 1998-02-04 王天伦 Method for producing ammonium sulfate by using waste ammonia water
CN103159232A (en) * 2011-12-13 2013-06-19 赵建鹏 Method for synthesizing ammonium sulfate by using recovered ammonia water from chemical fertilizer plant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1172070A (en) * 1997-07-11 1998-02-04 王天伦 Method for producing ammonium sulfate by using waste ammonia water
CN103159232A (en) * 2011-12-13 2013-06-19 赵建鹏 Method for synthesizing ammonium sulfate by using recovered ammonia water from chemical fertilizer plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112717455A (en) * 2020-12-14 2021-04-30 安徽国星生物化学有限公司 Rectification separation device and method for 2-cyanopyridine bottom material

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Application publication date: 20180501

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