KR100219261B1 - Method for treating waste water of polyethylene polyamine manufacturing process - Google Patents

Method for treating waste water of polyethylene polyamine manufacturing process Download PDF

Info

Publication number
KR100219261B1
KR100219261B1 KR1019970031323A KR19970031323A KR100219261B1 KR 100219261 B1 KR100219261 B1 KR 100219261B1 KR 1019970031323 A KR1019970031323 A KR 1019970031323A KR 19970031323 A KR19970031323 A KR 19970031323A KR 100219261 B1 KR100219261 B1 KR 100219261B1
Authority
KR
South Korea
Prior art keywords
hydrochloric acid
ammonia
polyethylene polyamines
wastewater
generated
Prior art date
Application number
KR1019970031323A
Other languages
Korean (ko)
Other versions
KR19990009058A (en
Inventor
김홍경
이인희
Original Assignee
박영구
삼성정밀화학주식회사
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 박영구, 삼성정밀화학주식회사 filed Critical 박영구
Priority to KR1019970031323A priority Critical patent/KR100219261B1/en
Publication of KR19990009058A publication Critical patent/KR19990009058A/en
Application granted granted Critical
Publication of KR100219261B1 publication Critical patent/KR100219261B1/en

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Physical Water Treatments (AREA)

Abstract

본 발명은 폴리에틸렌폴리아민류의 제조시 발생되는 폐수처리의 방법에 관한 것으로서, 더욱 상세하게는, 에틸렌디클로라이드와 무수암모니아를 원료로 사용하여 사슬형의 폴리에틸렌폴리아민류와 고리형의 폴리에틸렌폴리아민류를 제조함에 있어서, 폴리에틸렌폴리아민류의 중화후 생성되는 물로 인한 가성소다의 농축공정과 제품 정제공정에서 발생되는 폐수를 처리하는 방법에 관한 것으로, 폐수를 분별 증류후 5

Figure kpo00001
30 중량
Figure kpo00002
염산을 사용하여 암모니아를 암모늄 클로라이드로 전환시킴을 특징으로 하는 폐수 처리방법에 관한 것이다.The present invention relates to a method for treating wastewater generated in the production of polyethylene polyamines, and more particularly, to prepare chain-type polyethylene polyamines and cyclic polyethylene polyamines using ethylene dichloride and anhydrous ammonia as raw materials. The method for treating wastewater generated in the concentration step of caustic soda due to water generated after the neutralization of polyethylene polyamines and in the product purification process.
Figure kpo00001
30 weight
Figure kpo00002
A method of treating wastewater characterized by the conversion of ammonia to ammonium chloride using hydrochloric acid.

Description

폴리에틸렌폴리아민류 제조시 발생되는 폐수의 처리방법Wastewater Treatment Process in Manufacturing Polyethylene Polyamines

본 발명은 폴리에틸렌폴리아민류의 제조시 발생되는 폐수처리의 방법에 관한 것으로서, 더욱 상세하게는, 에틸렌디클로라이드와 무수암모니아를 원료로 사용하여 사슬형의 폴리에틸렌폴리아민류와 고리형의 폴리에틸렌폴리아민류를 제조함에 있어서, 폴리에틸렌폴리아민류의 중화후 생성되는 물로 인한 가성소다의 농축공정과 제품 정제공정에서 발생되는 폐수를 처리하는 방법에 관한 것이다.The present invention relates to a method of wastewater treatment generated during the production of polyethylene polyamines, and more particularly, to prepare chain-type polyethylene polyamines and cyclic polyethylene polyamines using ethylene dichloride and anhydrous ammonia as raw materials. In addition, the present invention relates to a method for treating wastewater generated in a concentration step of caustic soda due to water generated after neutralization of polyethylene polyamines and a product purification step.

폴리에틸렌폴리아민류의 제조방법에 관한 연구가 활발히 진행되어 왔으며, 그 대표적인 제조방법은, 첫째 모노에탄올아민을 암모니아와 반응시키는 모노에탄올아민법, 둘째 에틸렌클로라이드를 암모니아와 반응시키는 에틸렌클로라이드법, 셋째 에틸렌옥사이드를 암모니아와 반응시키는 에틸렌옥사이드법이 있다. 그러나, 이러한 종래 방법들 중에서 에틸렌디클로라이드법은 나머지 방법들과 비교할 때 분자량이 큰 폴리에틸렌폴리아민의 생산이 용이하여 분자량이 큰 폴리에틸렌폴리아민시장을 충족시킬 수 있으므로 미국, 서유럽, 일본등에서는 60

Figure kpo00004
이상이 에틸렌디클로라이드법을 채택하고 있다. 그러나 기존의 에틸렌디클로라이드법은 유기물이 함유된 염화나트륨이 발생하고, 또한 이 발생된 염화나트륨에 함유된 에틸렌디아민류 및 가성소다의 함량을 낮추기 위하여 많은 장치를 필요로 하여 장치투자비의 증가를 초래한다. 또한, 발생되는 폐수를 증류법으로만 처리하여 폐수중에 폴리에틸렌폴리아민류가 포함되는 문제점이 있다.Studies on the production of polyethylene polyamines have been actively conducted, the representative production method is first monoethanolamine method of reacting monoethanolamine with ammonia, second ethylene chloride method of reacting ethylene chloride with ammonia, third ethylene oxide Ethylene oxide is reacted with ammonia. However, among these conventional methods, the ethylene dichloride method is easier to produce polyethylene polyamine having a higher molecular weight than the other methods, and thus can satisfy the market for polyethylene polyamine having a large molecular weight.
Figure kpo00004
The above has adopted the ethylene dichloride method. However, the conventional ethylene dichloride method generates sodium chloride containing organic matter, and also requires a large number of devices to lower the content of ethylenediamines and caustic soda contained in the generated sodium chloride, resulting in an increase in equipment investment cost. In addition, there is a problem that polyethylene polyamines are included in the waste water by treating the generated waste water only by distillation.

이에 본 발명의 발명자들은 상기 종래의 에틸렌디클로라이드법에서 야기되는 폐수중 포함된 폴리에틸렌폴리아민류를 제거할 수 있는 신규한 방법을 발명하였다.Accordingly, the inventors of the present invention have invented a novel method for removing polyethylene polyamines contained in the wastewater caused by the conventional ethylene dichloride method.

제1도는 본 발명의 폐수처리 공정을 나타낸 블럭도이다.1 is a block diagram showing a wastewater treatment process of the present invention.

본 발명은 다음 구조식(II)로 표시되는 에틸렌디클로라이드와 다음 구조식(III)으로 표시되는 무수암모니아를 반응시켜 다음 구조식(I)a로 표시되는 사슬형의 폴리에틸렌폴리아민류와 다음 구조식(I)b으로 표시되는 고리형의 폴리에틸렌폴리아민류를 제조함에 있어서, 발생되는 폐수를 분별 증류후 5

Figure kpo00005
30 중량
Figure kpo00006
염산을 사용하여 암모니아를 암모늄 클로라이드로 전환시킴으로 특징으로 하는 폐수 처리방법을 특징으로 한다.The present invention reacts ethylene dichloride represented by the following structural formula (II) with anhydrous ammonia represented by the following structural formula (III) to form a chain-based polyethylene polyamine represented by the following structural formula (I) a and the following structural formula (I) b. In preparing cyclic polyethylene polyamines represented by
Figure kpo00005
30 weight
Figure kpo00006
A wastewater treatment process is characterized by converting ammonia to ammonium chloride using hydrochloric acid.

Figure kpo00007
Figure kpo00007

Figure kpo00008
Figure kpo00008

Figure kpo00009
Figure kpo00009

Figure kpo00010
Figure kpo00010

상기식에서, n은 1

Figure kpo00011
5이며, R1,R2는 각각 수소원자 또는 -CH2-CH2-NH2이다.Where n is 1
Figure kpo00011
5 and R 1 and R 2 each represent a hydrogen atom or -CH 2 -CH 2 -NH 2 .

이때 바람직한 염산의 농도는 염산 5중량

Figure kpo00012
내지 염산 10중량
Figure kpo00013
가 바람직하다.At this time, the preferred concentration of hydrochloric acid is 5 wt.
Figure kpo00012
To hydrochloric acid
Figure kpo00013
Is preferred.

이와 같은 본 발명을 더욱 상세히 설명하면 다음과 같다.Referring to the present invention in more detail as follows.

본 발명은 원료물질인 상기 구조식(II)로 표시되는 에틸렌디클로라이드와 상기 구조식(III)으로 표시되는 무수암모니아를 반응기에서 반응 후, 구조식(I)a로 표시되는 화합물과 구조식(I)b로 표시되는 화합물의 제조시 발생되는 폐수처리에 관한 것이다.The present invention is reacted with ethylene dichloride represented by the above formula (II) and anhydrous ammonia represented by the above formula (III) in a reactor in the reactor, the compound represented by the formula (I) a and formula (I) b The present invention relates to wastewater treatment generated in the preparation of the compound represented.

본 발명에서는 에틸렌디클로라이드와 무수암모니아를 원료로 사용하여 사슬형의 폴리에틸렌폴리아민류와 고리형의 폴리에틸렌폴리아민류를 제조함에 있어서, 폴리에틸렌폴리아민류의 중화후 생성되는 물로 인한 가성소다의 농축공정과 제품 정제공정에서 발생되는 폐수를 염산 5

Figure kpo00014
30중량
Figure kpo00015
, 바람직하게는 5
Figure kpo00016
10중량
Figure kpo00017
를 사용하여 폐수중 함유된 암모니아 및 에틸렌다아민을 암모니아의 염산염 형태인 암모늄 클로라이드로 전환시켜, 폐수처리를 용이하고, 폐수중에 암모니아 및 에틸렌디아민의 함량을 제거함으로써 환경오염등의 문제를 해결한 것이다.In the present invention, in the production of chain type polyethylene polyamines and cyclic polyethylene polyamines using ethylene dichloride and anhydrous ammonia as raw materials, the concentration process of caustic soda due to water generated after neutralization of polyethylene polyamines and product purification Hydrochloric acid from wastewater generated in the process 5
Figure kpo00014
30 weight
Figure kpo00015
, Preferably 5
Figure kpo00016
10 weight
Figure kpo00017
By converting ammonia and ethylenediamine contained in the wastewater into ammonium chloride, a hydrochloride form of ammonia, the wastewater treatment is easy, and the problem of environmental pollution is solved by removing the ammonia and ethylenediamine content in the wastewater. .

상기 염산을 사용한 폐수처리 공정을 제1도에 의거 좀더 구체적으로 설명하면 다음과 같다.Referring to the wastewater treatment process using the hydrochloric acid in more detail based on Figure 1 as follows.

첨부된 폐수처리 공정도와 같이, 반응후 발생하는 폐가스는 흡수탑(1)에, 폐수느 흡수액 회수조(2)에 주입된다. 이때 흡수조는 30

Figure kpo00018
50
Figure kpo00019
, 상압 조건에서 폐가스중 함유된 암모니아와 에틸렌다아민등을 순수를 사용하여 흡수시켜 1차적으로 폐수로 만든다. 흡수되지 않은 폐가스는 실시예 1
Figure kpo00020
4에서 알 수 있듯이 적정 농도가 되어 대기로 방출된다. 흡수액 회수조(2)에 모인 반응 폐수 및 흡수액(이하 "폐수"라 함)은 분별 증류칼럼(3)으로 이송된다. 폴리에틸렌폴리아민은 분별 증류칼럼(3)에서 80140
Figure kpo00022
가량의 온도, 0.11.0kg/㎠G 압력하에서 물, 암모니아 및 미량 에틸렌디아민을 폐수로부터 분별 증류하여 제거한다. 물, 암모니아 및 미량의 에틸렌디아민이 제거된 증류칼럼 하부의 액은 주로 폴리에틸렌폴리아민으로 아민 회수공정으로 순환된다.As shown in the attached wastewater treatment process diagram, the waste gas generated after the reaction is injected into the absorption tower 1 and into the absorbent liquid recovery tank 2 of the wastewater. At this time, the absorption tank is 30
Figure kpo00018
50
Figure kpo00019
Under normal pressure conditions, ammonia and ethylenediamine contained in the waste gas are absorbed by using pure water to make wastewater. Unabsorbed waste gas is Example 1
Figure kpo00020
As can be seen from Figure 4, the concentration is appropriate and is released to the atmosphere. The reaction wastewater and the absorbent liquid (hereinafter referred to as "wastewater") collected in the absorbent liquid recovery tank 2 are transferred to the fractional distillation column 3. Polyethylene polyamines were 80 in fractional distillation column (3). 140
Figure kpo00022
About temperature, 0.1 Water, ammonia and trace ethylenediamine are removed by fractional distillation from the wastewater under 1.0 kg / cm 2 G pressure. The liquid at the bottom of the distillation column from which water, ammonia and traces of ethylenediamine have been removed is mainly circulated to the amine recovery process with polyethylenepolyamine.

분별 증류된 기체는 열교환기(4,5)에서 40

Figure kpo00024
60
Figure kpo00025
가량으로 응축되어 응축저장조(6)에서 기체는 폐가스 처리공정으로 이송되고, 응축액의 일부는 칼럼(3)으로 재순환되고 나머지는 폐액 회수조(7)로 이송된다. 폐액 회수조(7)의 용액은 염산 5
Figure kpo00026
30중량
Figure kpo00027
, 더욱 바람직하게는 5
Figure kpo00028
10중량
Figure kpo00029
를 사용하여 용액중의 암모니아를 암모늄 클로라이드로 전환시켜 최종 폐수로 처리한다.Fractionally distilled gases were heated in a heat exchanger (4,5) to 40
Figure kpo00024
60
Figure kpo00025
Condensation is carried out to some extent, the gas from the condensation storage tank (6) is sent to the waste gas treatment process, a part of the condensate is recycled to the column (3) and the remainder is sent to the waste liquid recovery tank (7). The solution of the waste liquid recovery tank 7 is hydrochloric acid 5
Figure kpo00026
30 weight
Figure kpo00027
, More preferably 5
Figure kpo00028
10 weight
Figure kpo00029
The ammonia in solution is converted to ammonium chloride and treated with the final waste water.

이하, 본 발명은 실시예에 의거하여 상세히 설명하겠는바, 본 발명의 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail based on Examples, but is not limited to the Examples of the present invention.

[실시예 1

Figure kpo00030
4]Example 1
Figure kpo00030
4]

본 발명의 종래 공정에서 발생되는 폐수를 진공포집조에 통과시켜 폐수중에 함유된 비점이 낮은 암모니아, 에틸렌디아민 및 약간의 물이 제거된 후 방출되는 기체의 조성은 다음과 같다.The wastewater generated in the conventional process of the present invention is passed through a vacuum collection tank to remove the low-boiling ammonia, ethylenediamine and some water contained in the wastewater.

공기 : 95

Figure kpo00031
96
Figure kpo00032
Air: 95
Figure kpo00031
96
Figure kpo00032

물 : 4

Figure kpo00033
5
Figure kpo00034
Water: 4
Figure kpo00033
5
Figure kpo00034

암모니아 : 80

Figure kpo00035
90ppmAmmonia: 80
Figure kpo00035
90 ppm

에틸렌디아민 : 0.002

Figure kpo00036
0.004ppmEthylenediamine: 0.002
Figure kpo00036
0.004 ppm

유리구슬이 충진된 직경 1", 길이 60cm의 증류칼럼을 이용하여 분별 증류후 발생되는 폐수의 조성은 다음과 같다.The composition of wastewater generated after fractional distillation using a distillation column of 1 "diameter and 60 cm length filled with glass beads is as follows.

물 : 99.28

Figure kpo00037
99.30
Figure kpo00038
Water: 99.28
Figure kpo00037
99.30
Figure kpo00038

암모니아 : 0.70

Figure kpo00039
0.72
Figure kpo00040
Ammonia: 0.70
Figure kpo00039
0.72
Figure kpo00040

에틸렌디아민 : 9

Figure kpo00041
10ppmEthylenediamine: 9
Figure kpo00041
10 ppm

이와 같은 증류컬럼을 통해 분별 증류시 분별 증류된 용액을 염산 5중량

Figure kpo00042
, 염산 10중량
Figure kpo00043
, 염산 20중량
Figure kpo00044
및 염산 30중량
Figure kpo00045
로 각각 처리하였다. 처리후 중화처리된 폐수의 조성은 다음 표 1과 같다.5 parts by weight of hydrochloric acid in the fractional distilled solution during fractional distillation through such a distillation column
Figure kpo00042
Hydrochloric acid
Figure kpo00043
Hydrochloric acid
Figure kpo00044
And 30 weight of hydrochloric acid
Figure kpo00045
Respectively. The composition of the neutralized wastewater after treatment is shown in Table 1 below.

Figure kpo00046
Figure kpo00046

[비교예 1

Figure kpo00047
3]Comparative Example 1
Figure kpo00047
3]

이와 같은 증류컬럼을 통해 분별 증류시 분별 증류된 용액을 염산 2중량

Figure kpo00048
, 염산 50중량
Figure kpo00049
, 염산 60중량
Figure kpo00050
로 처리한 것을 제외하고는 실시예 1과 동일하게 시험하였다. 처리후 중화처리된 폐수의 조성은 다음 표 2와 같다.2 weight of hydrochloric acid for the fractionally distilled solution during fractional distillation through such a distillation column
Figure kpo00048
Hydrochloric acid
Figure kpo00049
Hydrochloric acid
Figure kpo00050
The test was carried out in the same manner as in Example 1 except that it was treated with. The composition of the neutralized wastewater after treatment is shown in Table 2 below.

Figure kpo00051
Figure kpo00051

이상의 실시예 및 비교예에서 나타난 바와 같이 염산 5중량

Figure kpo00052
이하인 경우 폐수의 조성중 암모니아가 0.5
Figure kpo00053
가량 혼입되어 있었고, 염산 중량
Figure kpo00054
가 30
Figure kpo00055
이상인 경우에는 물과 암모늄 클로라이드간의 조성에 큰 차이가 없었다. 따라서 염산 5중량
Figure kpo00056
내지 염산 30중량
Figure kpo00057
를 사용하여 처리한 것이 바람직하였으며, 특히 바람직하게는 염산 5중량
Figure kpo00058
내지 염산 10중량
Figure kpo00059
를 사용하는 경우이다.5 weights of hydrochloric acid as shown in the above Examples and Comparative Examples
Figure kpo00052
0.5 or less ammonia in the composition of the waste water if
Figure kpo00053
About the amount of hydrochloric acid
Figure kpo00054
30
Figure kpo00055
In the above case, there was no significant difference in the composition between water and ammonium chloride. Thus 5 weights of hydrochloric acid
Figure kpo00056
To hydrochloric acid
Figure kpo00057
It was preferable to treat with, particularly preferably 5 wt% of hydrochloric acid.
Figure kpo00058
To hydrochloric acid
Figure kpo00059
This is the case.

본 발명의 효과는 폴리에틸렌폴리아민류를 제조하는 방법에 있어서, 발생되는 폐수를 분별 증류한 후 염산 5중량

Figure kpo00060
내지 염산 30중량
Figure kpo00061
의 염산을 사용하여 암모니아를 처리함으로써 폐수 발생시 발생하는 암모니아를 제거하고 환경에 유해하지 않은 암모늄 클로라이드로 전환시켜 폐수를 처리함으로써 환경오염의 방지를 가능케 한 것이다.The effect of the present invention is a method for producing polyethylene polyamines, in which 5 wt% of hydrochloric acid is used after fractionally distilling the wastewater generated.
Figure kpo00060
To 30 wt% of hydrochloric acid
Figure kpo00061
By treating the ammonia with hydrochloric acid, it is possible to remove the ammonia generated when the waste water is generated and convert it to ammonium chloride which is not harmful to the environment to treat the waste water, thereby preventing the environmental pollution.

Claims (2)

구조식(II)로 표시되는 에틸렌디클로라이드와 다음 구조식(III)으로 표시되는 무수암모니아를 반응시켜 다음 구조식(I)a로 표시되는 사슬형의 폴리에틸렌폴리아민류와 다음 구조식(I)b으로 표시되는 고리형의 폴리에틸렌폴리아민류를 제조함에 있어서, 발생되는 폐수를 분별 증류후 5
Figure kpo00062
30 중량
Figure kpo00063
염산을 사용하여 암모니아를 암모늄 클로라이드로 전환시킴으로 특징으로 하는 폐수 처리방법.Ethylenedichloride represented by the formula (II) and anhydrous ammonia represented by the following formula (III) are reacted to form a chain of polyethylenepolyamine represented by the following formula (I) a and a ring represented by the following formula (I) b In preparing polyethylene polyamines of the type,
Figure kpo00062
30 weight
Figure kpo00063
A method for treating wastewater, characterized by converting ammonia to ammonium chloride using hydrochloric acid.
Figure kpo00064
Figure kpo00064
 상기식에서, n은 1
Figure kpo00065
5이며, R1,R2는 각각 수소원자 또는 -CH2-CH2-NH2이다.Where n is 1
Figure kpo00065
5 and R 1 and R 2 each represent a hydrogen atom or -CH 2 -CH 2 -NH 2 . 제1항에 있어서, 염산의 농도는 염산 5중량
Figure kpo00066
내지 염산 10중량
Figure kpo00067
임을 특징으로 하는 폐수 처리방법.The method of claim 1, wherein the concentration of hydrochloric acid is 5 weight of hydrochloric acid
Figure kpo00066
To 10 weights of hydrochloric acid
Figure kpo00067
Wastewater treatment method characterized in that.
KR1019970031323A 1997-07-07 1997-07-07 Method for treating waste water of polyethylene polyamine manufacturing process KR100219261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970031323A KR100219261B1 (en) 1997-07-07 1997-07-07 Method for treating waste water of polyethylene polyamine manufacturing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970031323A KR100219261B1 (en) 1997-07-07 1997-07-07 Method for treating waste water of polyethylene polyamine manufacturing process

Publications (2)

Publication Number Publication Date
KR19990009058A KR19990009058A (en) 1999-02-05
KR100219261B1 true KR100219261B1 (en) 1999-10-01

Family

ID=19513580

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970031323A KR100219261B1 (en) 1997-07-07 1997-07-07 Method for treating waste water of polyethylene polyamine manufacturing process

Country Status (1)

Country Link
KR (1) KR100219261B1 (en)

Also Published As

Publication number Publication date
KR19990009058A (en) 1999-02-05

Similar Documents

Publication Publication Date Title
KR20010049512A (en) Carbon dioxide recovery from an oxygen containing mixture
KR100490936B1 (en) System for recovering carbon dioxide from a lean feed
JPH06115928A (en) Method for recovering ammonia and organic compound from exhaust gas containing organic matter, carbon dioxide and ammonia
CN109876601B (en) Process method for absorbing sulfur dioxide in flue gas by functionalized ionic liquid and regenerating by Claus reaction at low temperature
JPH0775651B2 (en) Absorbent composition containing severely hindered amino compound and amino salt and method of absorbing H 2) S using the same
US5124135A (en) Process for the selective absorption of chlorine and/or bromine from CO.sub. -containing off-gases with the aid of steam
EP0134948A2 (en) Absorbent formulation for enhanced removal of acid gases from gas mixtures and processes using same
CN104093475A (en) Method and absorption medium for absorbing CO2 from a gas mixture
CN1748840A (en) Process for purifying gases
CN1865127A (en) Separation and purification method of mixed waste gas containing chlorine and hydrogen chloride
KR830007529A (en) Element Synthesis Method
US6277345B1 (en) Process for the purification of gases
JP5344113B2 (en) Hydrogen separation and recovery method and hydrogen separation and recovery equipment
US9227909B2 (en) Method for the continuous production of nitrobenzene
CN1329588A (en) Method for purifying triethanolamine
CN104718198A (en) Preparation of purified fluorosubstituted organic carbonates
FI66583B (en) FRAME FOR SAMPLING OF CHLORINE-FREE CHLORINE AGENTS WITH SODIUM CARBONATE
US3807138A (en) Recovery and purification of vinyl chloride venting from pvc reactors
EP2380870A1 (en) Method to recover organic tertiary amines from waste sulfuric acid employing a plug flow reactor
EP0636118B1 (en) Reclamation of alkanolamine solutions
KR100219261B1 (en) Method for treating waste water of polyethylene polyamine manufacturing process
US3595921A (en) Reducing the color content of polyethylene polyamines prepared by the reaction of ammonia with ethylene dichloride
US4514379A (en) Catalytic process for converting 2-oxazolidinones to their corresponding alkanolamines
JP5530516B2 (en) Chemical equipment
SU990078A3 (en) Process for purifying hydrogen chloride from hydrogen bromide

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20040615

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee