Unlock instant, AI-driven research and patent intelligence for your innovation.
Preparation method and application of ionic liquid for absorbing SO2
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An ionic liquid and SO2 technology, applied in the chemical industry, can solve the problems of high synthesis cost, long production process, and low absorption rate
Inactive Publication Date: 2013-05-01
SHIJIAZHUANG UNIVERSITY
View PDF5 Cites 11 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
But now many ionic liquids studied on SO 2 The absorption rate of gas is low, and it has the disadvantages of high synthesis cost and long production process.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0011] Weigh 0.5mol caprolactam and 0.2mol zinc sulfate, add caprolactam into the reactor, turn on the stirrer to stir, add zinc sulfate, react at 90°C for 2h, and then dry the obtained liquid in a vacuum oven at 50°C for 1h to obtain Colorless and transparent ionic liquid.
[0012] Place the obtained caprolactam-zinc sulfate ionic liquid in an absorber, place a stirrer in the absorber, and feed SO into the absorber at a constant temperature of 10mL / min at 25°C 2 Gas, the outlet of the absorption tail gas is passed into 20% sodiumhydroxide solution to absorb SO 2 Exhaust gas, weigh the absorber every 0.5h until constant weight, after balance, SO 2 The molar fraction in the ionic liquid is 0.75. SO 2 Mole fraction refers to SO 2 The number of moles in SO 2 and the proportion of moles of all components of the ionic liquid.
Embodiment 2
[0014] Weigh 0.7mol propionamide and 0.3mol zinc nitrate, add propionamide into the reactor, turn on the stirrer to stir, add zinc nitrate, react at 95°C for 2h, then dry the obtained liquid in a vacuum oven at 60°C for 2h , to obtain a colorless and transparent ionic liquid.
[0015] Place the obtained propionamide-zinc nitrate ionic liquid in an absorber, place a stirrer in the absorber, and feed SO into the absorber at a constant temperature of 10mL / min at 25°C 2 Gas, the outlet of the absorption tail gas is passed into 20% sodiumhydroxide solution to absorb SO 2 Exhaust gas, weigh the absorber every 0.5h until constant weight, after balance, SO 2 The molar fraction in the ionic liquid is 0.65.
Embodiment 3
[0017] Weigh 0.3mol caprolactam and 0.1mol lithium chloride, add caprolactam into the reactor, turn on the stirrer to stir, add lithium chloride, react at 75°C for 2h, then dry the obtained liquid in a vacuum oven at 50°C for 4h , to obtain a colorless and transparent ionic liquid.
[0018] Place the obtained caprolactam-lithium chloride ionic liquid in the absorber, place a stirrer in the absorber, and feed SO into the absorber at a constant temperature of 10mL / min at 25°C 2 Gas, the outlet of the absorption tail gas is passed into 20% sodiumhydroxide solution to absorb SO 2 Exhaust gas, weigh the absorber every 0.5h until constant weight, after balance, SO 2 The molar fraction in the ionic liquid is 0.82.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a preparation method of an ionic liquid for absorbing SO2, and an application of the ionic liquid in absorbing SO2. The preparation method of the ionic liquid comprises the steps of uniformly mixing one of aluminiumchloride, zincchloride, lithiumchloride, aluminum sulfate, zincsulfate, lithiumsulfate, aluminiumnitrate, zincnitrate and lithiumnitrate with one or two of urea, propanamide, butyramide, caprolactam, N,N-dimethylformamide and N,N-dimethylacetamide at a molar ratio of 1:(1-10) or 1:(0.5-3):(1-7), conducting reaction for 1-10h at 70-150 DEG C, conducting vacuum drying on an obtained solution at 40-60 DEG C, and obtaining the ionic liquid. The ionic liquid is mainly used for quickly and efficiently absorbing SO2. With the adoption of the ionic liquid as an SO2 absorbent, requirements on equipment required for absorbing SO2 are simple, the operational conditions are mild, the absorption efficiency is high, the cost is low, the ionic liquid can be recycled, and waste liquid and waste water discharge and other problems do not exist, and the ionic liquid is suitable for industrial production, meets the requirements of green chemical development of the contemporary society, and has good economic and social benefits.
Description
technical field [0001] The invention belongs to the field of chemical industry, in particular to a 2 Preparation of gas-based ionic liquids and their role in absorbing SO 2 gas applications. Background technique [0002] Air pollution is one of the major environmental problems faced by human beings, among which SO 2 Pollution has the greatest impact on the environment. SO 2 It mostly exists in industrial waste gas. Its discharge will not only cause environmental pollution, but also form acid rain, which will bring economic losses to human beings and even affect human health. [0003] At present, the methods of industrial waste gas desulfurization are mainly divided into dry method and wet method. Among them, the dry method adopts fluidized bed desulfurization. The desulfurization efficiency of this process is lower than that of the wet method. It is not suitable for desulfurization of industrial waste gas with high sulfur content, and has higher requirements for operati...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More