CN108837667A - A kind of absorption of hydrogen chloride gas and its desorption method and application - Google Patents
A kind of absorption of hydrogen chloride gas and its desorption method and application Download PDFInfo
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- CN108837667A CN108837667A CN201810681529.2A CN201810681529A CN108837667A CN 108837667 A CN108837667 A CN 108837667A CN 201810681529 A CN201810681529 A CN 201810681529A CN 108837667 A CN108837667 A CN 108837667A
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- hydrogen chloride
- chloride gas
- ethylene glycol
- absorption
- absorption process
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 250
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims abstract description 230
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims abstract description 230
- 239000007789 gas Substances 0.000 title claims abstract description 224
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000003795 desorption Methods 0.000 title claims abstract description 18
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 218
- 230000008569 process Effects 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 34
- OASOQJKCZXXDMI-UHFFFAOYSA-N ethane-1,2-diol;hydrochloride Chemical compound Cl.OCCO OASOQJKCZXXDMI-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 6
- 239000003814 drug Substances 0.000 claims abstract description 4
- 239000000575 pesticide Substances 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 59
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 54
- 239000011780 sodium chloride Substances 0.000 claims description 27
- 230000004044 response Effects 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 15
- 239000001110 calcium chloride Substances 0.000 claims description 15
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 15
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 12
- 235000014121 butter Nutrition 0.000 claims description 11
- 239000001103 potassium chloride Substances 0.000 claims description 6
- 235000011164 potassium chloride Nutrition 0.000 claims description 6
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 claims description 3
- 239000005049 silicon tetrachloride Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 238000003860 storage Methods 0.000 abstract description 10
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000009257 reactivity Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 29
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 17
- 238000001035 drying Methods 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 12
- 239000007787 solid Substances 0.000 description 11
- 239000002250 absorbent Substances 0.000 description 8
- 230000002745 absorbent Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005660 chlorination reaction Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- -1 and still Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001804 chlorine Chemical class 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
- B01D2252/2023—Glycols, diols or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a kind of absorption of hydrogen chloride gas and its desorption method and applications.The present invention includes the following steps：1) it pre-processes：Hydrogen chloride gas is dried；2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, stirs, obtains hydrogen chloride ethylene glycol solution；The present invention gives desorption method and its application of above-mentioned hydrogen chloride ethylene glycol solution.Hydrogen chloride gas of the invention is directly absorbed using ethylene glycol after dry, and absorption efficiency is high, hydrogen chloride ethylene glycol solution after absorption is liquid, storage is convenient, is not necessarily to pressure-resistant equipment, and transport is easy, it is used directly for the synthesis of pesticide and medicine intermediate, it is easy to use, also, water is eliminated in synthesis technology to the adverse effect of reaction process, reactivity is high, and selectivity is good；In addition, hydrogen chloride gas can also desorb to be recycled from the hydrogen chloride ethylene glycol solution after absorption, the wasting of resources is avoided.
Description
Technical field
The invention belongs to the technical field of chlorination storing hydrogen, absorption and its desorption side of a kind of hydrogen chloride gas are particularly related to
Method and application.
Background technique
Hydrogen chloride gas is a kind of colourless gas, is highly soluble in water, and aqueous solution is colourless transparent liquid.Chlorination in air
Hydrogen emits white cigarette, and irritant smell is sour, is corrosive；It pollutes environment, is harmful to the human body, and generates corrosion to storage facilities.
Currently, hydrogen chloride gas is normally stored in steel cylinder, height is needed to be pressed into steel cylinder, steel cylinder needs pressure-resistant corrosion-resistant, this
Storing mode is very inconvenient, moreover, transportation safety hidden danger is big.In addition, the industrial hydrogen chloride gas after centainly post-processing
It is generally absorbed using adiabatic absorption tower, the shortcomings that adiabatic absorption tower absorbing hydrogen chloride gas is that absorption efficiency is low, parking inspection
It repairs number and equipment replacement is frequent, flooding, Biased flow phenomenon easily occurs in distributor corrosion-vulnerable, adiabatic absorption tower.
Summary of the invention
The present invention provides the absorption and its desorption method and application of a kind of hydrogen chloride gas, solves chlorine in the prior art
Change storing hydrogen and transport inconvenience, the big problem low with absorption efficiency of security risk.
A kind of absorption process of hydrogen chloride gas of the invention, is mainly realized by the following technical programs：
Include the following steps：1) it pre-processes：Hydrogen chloride gas is dried, the moisture content of hydrogen chloride gas is made to be no more than 1%；2) it inhales
The receipts stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, stirs, obtains hydrogen chloride ethylene glycol solution.
Hydrogen chloride gas is dried first by the present invention, is then absorbed, is made to hydrogen chloride gas using ethylene glycol
Hydrogen chloride gas is dissolved in ethylene glycol, forms hydrogen chloride ethylene glycol solution, and absorption efficiency is high；It is this to be stored in ethylene glycol
Hydrogen chloride is formed with liquid to be existed, and storage is convenient, and general container can store, and is not necessarily to pressure vessel, does not have to storage facilities
Particular/special requirement；It is readily transported, transportation safety；This hydrogen chloride being stored in ethylene glycol can be carried out directly using can also be with
By desorption after carry out again using, have a wide range of application, it is easy to use, avoid the wasting of resources.
Embodiment as one preferred, in the step 1), the purity of hydrogen chloride gas is not less than 30%.The present invention
The hydrogen chloride gas that can be absorbed be it is a variety of, can be hydrogen chloride production enterprise production hydrogen chloride gas, be also possible to
The hydrogen chloride gas being stored in steel cylinder can also be the hydrogen chloride gas discharged in relevant enterprise tail gas, these hydrogen chloride categories
In raw material hydrogen chloride, these hydrogen chloride gas can be absorbed after certain removal of impurities processing by ethylene glycol, can also be straight
Connected ethylene glycol absorption；Here the purity of hydrogen chloride gas is generally in 30-95%, and when purity is 80%, absorption efficiency is most
Greatly, it absorbs most effective；Here the purity of hydrogen chloride gas refers to that hydrogen chloride gas accounts for the mass concentration of mixed gas.
Embodiment as one preferred, in the step 1), dry desiccant used is calcium chloride, silica gel, four
Any one in silicon chloride, phosphorus pentoxide or the concentrated sulfuric acid.Hydrogen chloride gas controls its purity and moisture content, to obtain one
Kind anhydrous hydrogen chloride ethylene glycol solution, this anhydrous hydrogen chloride ethylene glycol solution purity is high, not aqueous, desorption is easy, will not shape
At azeotropic mixture.
Embodiment as one preferred, in the step 2), stirring rate 200-400r/min.It is stirred continuously second
Glycol keeps absorbing hydrogen chloride gas abundant, and gained hydrogen chloride ethylene glycol solution even concentration is consistent, further increases absorptivity.
Embodiment as one preferred, in the step 2), the flow velocity of hydrogen chloride gas is 0.01-50L/min.Control
Absorption efficiency can be improved in the dosage of flow velocity and ethylene glycol that hydrogen chloride gas processed enters ethylene glycol, guarantees that hydrogen chloride gas is filled
Divide and absorbs；Certainly, after hydrogen chloride gas is absorbed by ethylene glycol, the remaining hydrogen chloride gas absorbed not in time can also lead to
It crosses absorbent and carries out tail gas recycle, to avoid environmental pollution is caused, absorbent here can be water or alkaline solution.
Embodiment as one preferred, in the step 1), hydrogen chloride gas is that butter and the concentrated sulfuric acid are anti-
It should form.Made of hydrogen chloride gas of the invention can be butter and strong sulfuric acid response, by controlling inorganic chlorinating
The purity of object improves the purity of hydrogen chloride gas, and the hydrogen chloride gas purity is high after this direct reaction directly passes through ethylene glycol
It absorbs, facilitates the collection and storage of hydrogen chloride gas.
Embodiment as one preferred, the butter are any in sodium chloride, potassium chloride or calcium chloride
It is a kind of.Under the action of the concentrated sulfuric acid, sodium chloride, potassium chloride, calcium chloride occur displacement with it and react to obtain hydrogen chloride gas, when
So, it can also react to form hydrogen chloride gas with concentrated hydrochloric acid using the concentrated sulfuric acid.
Embodiment as one preferred, the concentrated sulfuric acid are added dropwise in the butter, rate of addition 30-
45 drops/min.The preparation method of hydrogen chloride gas is usually that the concentrated sulfuric acid is added dropwise in the container equipped with butter, is controlled dense
The rate of addition of sulfuric acid, to control the speed that hydrogen chloride gas enters in ethylene glycol.
A kind of desorption method of hydrogen chloride gas of the invention, is mainly realized by the following technical programs：
By the resulting hydrogen chloride ethylene glycol solution heating of the absorption process of hydrogen chloride gas described in any of the above one, heating temperature is
80-180℃。
The hydrogen chloride gas that the present invention absorbs in ethylene glycol can desorb at any time, gained hydrogen chloride gas purity after desorption
It is 99.8%, the hydrogen chloride purity is high after desorption is free of ethylene glycol, can realize and be kept completely separate with ethylene glycol, for it
It needs the place of hydrogen chloride gas；Hydrogen chloride ethylene glycol solution desorption method of the invention is easy to operate, mild condition, desorption
It is high-efficient, it is easy to use to equipment without particular/special requirement.
A kind of application of hydrogen chloride gas of the invention, is mainly realized by the following technical programs：It will be upper
The resulting hydrogen chloride ethylene glycol solution of the absorption process of hydrogen chloride gas described in any one of face is used among pesticide and medicine
The synthesis of body.
The hydrogen chloride gas of absorption of the invention in ethylene glycol can also be applied directly, and hydrogen chloride gas is as anti-
Object is answered, ethylene glycol reacts in the solution as solvent, and reaction rate is higher, hydrogen chloride gas of this absorption in ethylene glycol
It is directly applied without desorbing, further simplifies process flow, saved energy consumption, reduce costs, it is easy to use.
Compared with prior art, the beneficial effects of the invention are as follows：It is of the invention using ethylene glycol absorbing hydrogen chloride gas
Method, absorptivity is simple and convenient up to 95-99%, at low cost；This hydrogen chloride being stored in ethylene glycol is with liquid shape
Formula exists, and storage is convenient, and general container can store, and is not necessarily to pressure vessel, does not have particular/special requirement to storage facilities, convenient for fortune
It is defeated, transportation safety；This hydrogen chloride being stored in ethylene glycol can be carried out directly using in the neck such as chemical industry, agricultural and military affairs
Domain is widely applied, and further simplifies process flow, has saved energy consumption, reduces costs, easy to use；It is this to be stored in second two
Hydrogen chloride in alcohol is carried out again after may also pass through desorption using directly obtaining hydrogen chloride gas, have a wide range of application, avoid
The wasting of resources.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiments of the present invention, is shown
So, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：1) it pre-processes：By hydrogen chloride gas into
Row drying makes the moisture content of hydrogen chloride gas be no more than 1%；2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through
In ethylene glycol, stirring obtains hydrogen chloride ethylene glycol solution.
Preferably, in the step 1), the purity of hydrogen chloride gas is not less than 30%.
Further, in the step 1), dry desiccant used is calcium chloride, silica gel, silicon tetrachloride, five oxidations two
Any one in phosphorus or the concentrated sulfuric acid.
Specifically, in the step 2), stirring rate 200-400r/min.
It is highly preferred that the flow velocity of hydrogen chloride gas is 0.01-50L/min in the step 2).
Further, in the step 1), hydrogen chloride gas is that butter is formed with strong sulfuric acid response.
More specifically, the butter is any one in sodium chloride, potassium chloride or calcium chloride.
Again less preferably, the concentrated sulfuric acid is added dropwise in the butter, and rate of addition is 30-45 drop/min.
The desorption method of a kind of hydrogen chloride gas of the invention, by the absorption of hydrogen chloride gas described in any of the above one
The resulting hydrogen chloride ethylene glycol solution heating of method, heating temperature is 80-180 DEG C.
The application of a kind of hydrogen chloride gas of the invention, by the absorption process of hydrogen chloride gas described in any of the above one
Resulting hydrogen chloride ethylene glycol solution is used for the synthesis of pesticide and medicine intermediate.
Embodiment one
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) it pre-processes：The hydrogen chloride gas that hydrogen chloride gas manufacturing enterprise produces directly is dried, hydrogen chloride gas is made
The moisture content of body is 1%, and the purity of hydrogen chloride gas is 80%；
2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, the flow velocity of hydrogen chloride gas is
50L/min, stirring, obtains hydrogen chloride ethylene glycol solution.
Detected ethylene glycol is 95% to the absorptivity of hydrogen chloride gas.
Embodiment two
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) it pre-processes：The hydrogen chloride gas stored in steel cylinder is dried using calcium chloride, makes containing for hydrogen chloride gas
Water rate is 0.1%；
2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, the flow velocity of hydrogen chloride gas is 5L/
Min, stirring, control stirring rate are 200r/min, obtain hydrogen chloride ethylene glycol solution.
Detected ethylene glycol is 96% to the absorptivity of hydrogen chloride gas.
Embodiment three
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) it pre-processes：The hydrogen chloride gas that will be discharged in certain chemical company's tail gas, after being handled by removal of impurities, using chlorination
Calcium is dried, and makes the moisture content 0.6% of hydrogen chloride gas, and the purity of this hydrogen chloride gas is 30%；
2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, the flow velocity of hydrogen chloride gas is
30L/min, the dosage of ethylene glycol are 300mL, and stirring, control stirring rate is 300r/min, obtains hydrogen chloride ethylene glycol solution.
Detected ethylene glycol is 99% to the absorptivity of hydrogen chloride gas.
Example IV
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, electromagnetic heating reactor makes sodium chloride and strong sulfuric acid response, the substance of sodium chloride and the concentrated sulfuric acid to 150 DEG C
The ratio between amount be 1:2, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using calcium chloride, makes the moisture content of hydrogen chloride gas
It is 0.08%, the purity of hydrogen chloride gas is 80%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 300mL, and stirs, control stirring rate is 400r/min, obtains anhydrous hydrogen chloride ethylene glycol solution.
Detected ethylene glycol is 99% to the absorptivity of hydrogen chloride gas.
Embodiment five
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid potassium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes potassium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using silica gel, makes the moisture content of hydrogen chloride gas
0.5%, the purity of hydrogen chloride gas is 78%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 400mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 98% to the absorptivity of hydrogen chloride gas.
Embodiment six
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into calcium chloride solid in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes calcium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using calcium chloride, makes the moisture content of hydrogen chloride gas
It is 0.1%, the purity of hydrogen chloride gas is 79%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 500mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 98% to the absorptivity of hydrogen chloride gas.
Embodiment seven
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, the ratio between sodium chloride and the amount of substance of the concentrated sulfuric acid are 1:
1, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using silicon tetrachloride, makes the aqueous of hydrogen chloride gas
Rate is 0.8%, and the purity of hydrogen chloride gas is 79%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 200mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 98% to the absorptivity of hydrogen chloride gas.
Embodiment eight
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, the ratio between sodium chloride and the amount of substance of the concentrated sulfuric acid are 1:
3, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using calcium chloride, makes the moisture content of hydrogen chloride gas
It is 0.02%, the purity of hydrogen chloride gas is 78%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 200mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 98% to the absorptivity of hydrogen chloride gas.
Embodiment nine
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using the concentrated sulfuric acid, makes the moisture content of hydrogen chloride gas
It is 0.01%, the purity of hydrogen chloride gas is 78%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 300mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 97% to the absorptivity of hydrogen chloride gas.
Embodiment ten
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 30 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using the concentrated sulfuric acid, makes the moisture content of hydrogen chloride gas
It is 0.1%, the purity of hydrogen chloride gas is 78%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 300mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 96% to the absorptivity of hydrogen chloride gas.
Embodiment 11
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 40 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using phosphorus pentoxide, makes containing for hydrogen chloride gas
Water rate is 0.1%, and the purity of hydrogen chloride gas is 80%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 300mL, and stirs, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 99% to the absorptivity of hydrogen chloride gas.
Embodiment 12
A kind of absorption process of hydrogen chloride gas of the invention, includes the following steps：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 45 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using the concentrated sulfuric acid, makes the moisture content of hydrogen chloride gas
It is 0.2%, the purity of hydrogen chloride gas is 80%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into ethylene glycol and is absorbed, the dosage of ethylene glycol
It for 200mL, and stirs, control stirring rate is 400r/min, obtains anhydrous hydrogen chloride ethylene glycol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected ethylene glycol is 99% to the absorptivity of hydrogen chloride gas.
Comparative experiments one
On the basis of a kind of absorption process of hydrogen chloride gas of the invention, absorbent is changed into methanol, experimental procedure
For：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, the ratio between sodium chloride and the amount of substance of the concentrated sulfuric acid are 1:
1, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using calcium chloride, makes the moisture content of hydrogen chloride gas
It is 0.1%, the purity of hydrogen chloride gas is 79%；
3) hydrogen chloride gas after the resulting drying of step 2) is passed into methanol and is absorbed, the dosage of methanol is
600mL, and stir, control stirring rate is 300r/min, obtains anhydrous hydrogen chloride methanol solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected methanol is 45% to the absorptivity of hydrogen chloride gas.
Comparative experiments two
On the basis of a kind of absorption process of hydrogen chloride gas of the invention, absorbent is changed into dilute hydrochloric acid, experiment step
Suddenly it is：
1) preparation of hydrogen chloride gas：It is put into solid sodium chloride in the reactor, by the concentrated sulfuric acid with 35 drops/min rate
It instills in reactor, heating response device, makes sodium chloride and strong sulfuric acid response, the ratio between sodium chloride and the amount of substance of the concentrated sulfuric acid are 1:
1, generate hydrogen chloride gas；
2) hydrogen chloride gas that step 1) reaction generates is dried using calcium chloride, makes the moisture content of hydrogen chloride gas
It is 0.1%, the purity of hydrogen chloride gas is 80%；
3) hydrogen chloride gas after the resulting drying of step 2) being passed into water and is absorbed, the dosage of water is 600mL,
And stir, control stirring rate is 300r/min, obtains hydrochloric acid solution；
4) hydrogen chloride gas unabsorbed in step 3) is passed through into suck-back device, then is absorbed using water.
Detected dilute hydrochloric acid is 65% to the absorptivity of hydrogen chloride gas.
It, can by embodiment one to embodiment 12 it is found that ethylene glycol is high to the absorptivity of hydrogen chloride gas in the present invention
Up to 95-99%, hydrogen chloride gas, differential responses object, different desiccant and the different hydrogen chloride gas of separate sources generate speed
Rate does not influence the efficiency of ethylene glycol absorbing hydrogen chloride gas, this illustrates the institute into embodiment 12 of the embodiment of the present invention one
The dosage of absorbent ethylene glycol is sufficient.Method of the invention can complete the suction to hydrogen chloride gas well
It receives, keeps its storage convenient.By embodiment one to embodiment 12 compared with comparative experiments one and comparative experiments two, chlorine of the invention
The absorptivity for changing hydrogen absorption process is apparently higher than common absorbent methanol, absorbs more convenient；Hydrogen chloride of the invention
The absorptivity of gas absorption process can achieve even more than common absorbent water to the absorptivity of hydrogen chloride, and still, water is made
It for absorbent, after absorbing hydrogen chloride gas, can not be desorbed, can only be used as hydrochloric acid solution, and be used of the invention
Absorbing hydrogen chloride gas method absorb after obtained hydrogen chloride ethylene glycol solution be heated to be desorbed at 80-180 DEG C,
Gained hydrogen chloride gas purity is 99.8% after desorption, does not influence the subsequent use value of hydrogen chloride gas.In addition, existing work
The adiabatic absorption tower used in industry is only 50% for the absorptivity of hydrogen chloride gas, this is also significantly lower than hydrogen chloride of the invention
The absorptivity of gas absorption process.
Therefore, compared with prior art, the beneficial effects of the invention are as follows：Of the invention uses ethylene glycol absorbing hydrogen chloride gas
The method of body, absorptivity is simple and convenient up to 95-99%, at low cost；This hydrogen chloride being stored in ethylene glycol is with liquid
Body form exists, and storage is convenient, and general container can store, and is not necessarily to pressure vessel, does not have particular/special requirement to storage facilities, just
In transport, transportation safety；This hydrogen chloride being stored in ethylene glycol can be carried out directly using in chemical industry, agricultural and military affairs
Equal fields are widely applied, and further simplify process flow, have saved energy consumption, reduce costs, easy to use, also, eliminate
For water to the adverse effect of reaction process, reactivity is high in synthesis technology, and selectivity is good；This chlorine being stored in ethylene glycol
Change hydrogen may also pass through desorption after carry out again using, directly obtain hydrogen chloride gas, have a wide range of application, avoid resource wave
Take.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of absorption process of hydrogen chloride gas, it is characterised in that：Include the following steps：
1) it pre-processes：Hydrogen chloride gas is dried, the moisture content of hydrogen chloride gas is made to be no more than 1%；
2) absorption stage：The resulting hydrogen chloride gas of step 1) is passed through in ethylene glycol, stirs, obtains hydrogen chloride ethylene glycol solution.
2. the absorption process of hydrogen chloride gas according to claim 1, it is characterised in that：
In the step 1), the purity of hydrogen chloride gas is not less than 30%.
3. the absorption process of hydrogen chloride gas according to claim 2, it is characterised in that：
In the step 1), dry desiccant used is in calcium chloride, silica gel, silicon tetrachloride, phosphorus pentoxide or the concentrated sulfuric acid
Any one.
4. the absorption process of hydrogen chloride gas according to claim 1, it is characterised in that：
In the step 2), stirring rate 200-400r/min.
5. the absorption process of hydrogen chloride gas according to claim 1, it is characterised in that：
In the step 2), the flow velocity of hydrogen chloride gas is 0.01-50L/min.
6. the absorption process of hydrogen chloride gas according to claim 1, it is characterised in that：
In the step 1), hydrogen chloride gas is that butter is formed with strong sulfuric acid response.
7. the absorption process of hydrogen chloride gas according to claim 6, it is characterised in that：
The butter is any one in sodium chloride, potassium chloride or calcium chloride.
8. the absorption process of hydrogen chloride gas according to claim 6, it is characterised in that：
The concentrated sulfuric acid is added dropwise in the butter, and rate of addition is 30-45 drop/min.
9. a kind of desorption method of hydrogen chloride gas, it is characterised in that：Include the following steps：
According to claim 1, the resulting hydrogen chloride ethylene glycol of the absorption process of hydrogen chloride gas described in any one of -8 is molten
Liquid heating, heating temperature are 80-180 DEG C.
10. a kind of application of hydrogen chloride gas, it is characterised in that：
According to claim 1, the resulting hydrogen chloride ethylene glycol of the absorption process of hydrogen chloride gas described in any one of -8 is molten
Liquid is used for the synthesis of pesticide and medicine intermediate.
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