CN107376998A - A kind of preparation method of the ultralow mercury catalyst of catalyzing acetylene and hydrogen chloride synthesis vinyl chloride - Google Patents
A kind of preparation method of the ultralow mercury catalyst of catalyzing acetylene and hydrogen chloride synthesis vinyl chloride Download PDFInfo
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- CN107376998A CN107376998A CN201710442649.2A CN201710442649A CN107376998A CN 107376998 A CN107376998 A CN 107376998A CN 201710442649 A CN201710442649 A CN 201710442649A CN 107376998 A CN107376998 A CN 107376998A
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- phase adsorption
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- chloride
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- 239000003054 catalyst Substances 0.000 title claims abstract description 40
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 38
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 37
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims description 27
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 title claims description 9
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 title claims description 9
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims description 7
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 52
- 239000012071 phase Substances 0.000 claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000007791 liquid phase Substances 0.000 claims abstract description 11
- 238000007654 immersion Methods 0.000 claims abstract description 8
- 230000008595 infiltration Effects 0.000 claims abstract description 8
- 238000001764 infiltration Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 32
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 150000001345 alkine derivatives Chemical class 0.000 abstract description 5
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- 239000003463 adsorbent Substances 0.000 description 12
- NHGXDBSUJJNIRV-UHFFFAOYSA-M tetrabutylammonium chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CCCC NHGXDBSUJJNIRV-UHFFFAOYSA-M 0.000 description 12
- 239000007788 liquid Substances 0.000 description 11
- 238000001035 drying Methods 0.000 description 9
- 239000003610 charcoal Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 239000011592 zinc chloride Substances 0.000 description 7
- 235000005074 zinc chloride Nutrition 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 6
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 6
- 229910001626 barium chloride Inorganic materials 0.000 description 6
- 125000003963 dichloro group Chemical group Cl* 0.000 description 6
- 229910052763 palladium Inorganic materials 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- -1 medical industry Substances 0.000 description 4
- 150000002730 mercury Chemical class 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007420 reactivation Effects 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- LPSCRKGVODJZIB-UHFFFAOYSA-N [I].[C] Chemical class [I].[C] LPSCRKGVODJZIB-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical class Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JHXKRIRFYBPWGE-UHFFFAOYSA-K bismuth chloride Chemical compound Cl[Bi](Cl)Cl JHXKRIRFYBPWGE-UHFFFAOYSA-K 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KZIKDWMVGLXOTB-UHFFFAOYSA-N chloranylethene Chemical compound ClC=C.ClC=C KZIKDWMVGLXOTB-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007038 hydrochlorination reaction Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 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
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/08—Halides
- B01J27/10—Chlorides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0234—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
- B01J31/0235—Nitrogen containing compounds
- B01J31/0239—Quaternary ammonium compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0209—Impregnation involving a reaction between the support and a fluid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/07—Preparation of halogenated hydrocarbons by addition of hydrogen halides
- C07C17/08—Preparation of halogenated hydrocarbons by addition of hydrogen halides to unsaturated hydrocarbons
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides a kind of preparation method of ultralow mercury catalyst for VCM synthesis, includes preparation, the absorption of activated carbon, and the absorption includes Gas Phase Adsorption mercury chloride and liquid phase adsorption collaboration accelerator；The liquid phase adsorption, including immersion absorption, the immersion absorption, soak 2 hours under 120 125 DEG C of temperature conditionss, are dried under 110 DEG C of temperature conditionss to aqueous less than 0.2%；The liquid phase adsorption, including vacuum infiltration absorption, the vacuum infiltration absorption, vacuumize, 30s are kept after reaching 0.035 ~ 0.038MPa pressure, then recover to normal pressure, soak 5min under normal pressure；Ultralow mercury catalyst prepared by the present invention, for vinyl chloride synthesis reaction, conversion of alkyne is up to 99.90 99.91%, and vinyl chloride selectivity is up to 99.9 100%, and the yield of vinyl chloride is up to 94.2 94.5%.
Description
The present invention is application number 201510703909.8, the applying date：On October 27th, 2015, denomination of invention：" one kind is used for
The divisional application of the preparation method of the ultralow mercury catalyst of VCM synthesis ".
Technical field
The present invention relates to a kind of preparation method of the ultralow mercury catalyst for VCM synthesis, belong to fine chemistry technology
Field.
Background technology
The polyvinyl chloride synthesized by VCM（PVC）, it is the thermoplastic articles raw material that yield is maximum in the world
One of, it is widely used in the fields such as materials for construction, packaging material, electric equipment products, medical industry, coating and adhesive.
The industrialized production of current synthesis vinyl chloride thereof monomer in the world is based on ethylene process.Fluctuated by crude oil price larger
Influence, occupy critical role at home through hydrogen chloride production PVC by acetylene.Acetylene hydrochlorination reaction industrial at present, mainly
The high mercury catalyst that mercury chloride load capacity is 12% ~ 15% is used, its dosage to mercury accounts for the 60% of domestic mercury usage amount, and
Serious harm is caused to the health of environment and the mankind.
Pollution for the rare of mercury resource and to environment, and both at home and abroad to the increasingly severe of mercury pollution prevention and control policy,
There is an urgent need to be had breakthrough in the improvement to mercury chloride performance and the research of high-performance environment protection type catalyst, meeting that industry is raw
While production needs, mercury resource consumption and pollution and harm to environment and human health is greatly lowered.
Existing low-mercury catalyst, has the following disadvantages：
（1）Mercury content is high；
（2）Service life is short；
（3）Catalytic performance is poor, and for vinyl chloride synthesis reaction, conversion of alkyne is less than 99.8%, vinyl chloride vinyl chloride selectivity and
Yield is low.
The content of the invention
The present invention is solution the shortcomings of the prior art, there is provided a kind of ultralow mercury catalyst for VCM synthesis
Preparation and its mercury recovery method, to realize following goal of the invention：
（1）Ultralow mercury catalyst prepared by the present invention, the adsorbing chlorinated mercury in activated carbon center, obtained ultralow mercury catalyst with
Percentage by weight meter, chloride containing mercury 0.93-1.0%, zinc chloride 2.4-2.5%, barium chloride 1.2-2.5%, tetrabutylammonium chloride 1.2-
3.75%th, the ammonia palladium 1.25-2.4% of dichloro four, water 0.2%, mechanical strength 96.6-96.9%, 3~6mm of granularity（97-97.5%）, accumulation
Density 500-505g/l.
（2）Ultralow mercury catalyst prepared by the present invention, catalyst service life length.
（3）Catalyst prepared by the present invention is used for vinyl chloride synthesis reaction, and conversion of alkyne reaches 99.90-99.91%, chloroethene
Alkene selectively reaches 99.9-100%, and the yield of vinyl chloride reaches 94.2-94.5%.
To solve above technical problem, the present invention uses following technical scheme：
A kind of preparation method of ultralow mercury catalyst for VCM synthesis, include preparation, the absorption of activated carbon, the absorption
Including Gas Phase Adsorption mercury chloride and liquid phase adsorption collaboration accelerator.
It is the further improvement to above-mentioned technical proposal below：
The Gas Phase Adsorption mercury chloride includes first stage Gas Phase Adsorption, the first stage Gas Phase Adsorption, and control pressure is
0.6-0.7MPa, temperature are 540-560 DEG C, mass space velocity 7h-1, adsorb 15min.
The Gas Phase Adsorption mercury chloride includes second stage Gas Phase Adsorption, the second stage Gas Phase Adsorption, is depressurized to pressure
Power is 0.4-0.5 MPa, and temperature is 420-440 DEG C, mass space velocity 8h-1, adsorb 10min.
The Gas Phase Adsorption mercury chloride includes phase III Gas Phase Adsorption, the phase III Gas Phase Adsorption, boosts to pressure
Power is 0.7-0.8 MPa, and temperature is 560-570 DEG C, mass space velocity 6h-1, adsorb 5min.
The Gas Phase Adsorption mercury chloride, the content for controlling mercury chloride are 1.0-1.1%.
The liquid phase adsorption, including immersion absorption, the immersion absorption, it is small to soak 2 under 120-125 DEG C of temperature conditionss
When, dried under 110 DEG C of temperature conditionss to aqueous less than 0.2%.
The liquid phase adsorption, including vacuum infiltration absorption, vacuum infiltration absorption, are vacuumized, reach -0.035 ~ -
30s is kept after 0.038MPa pressure, then is recovered to normal pressure, soaks 5min under normal pressure.
Using above technical scheme, beneficial effects of the present invention are：
（1）Ultralow mercury catalyst prepared by the present invention, the adsorbing chlorinated mercury in activated carbon center, obtained ultralow mercury catalyst with
Percentage by weight meter, chloride containing mercury 0.93-1.0%, zinc chloride 2.4-2.5%, barium chloride 1.2-2.5%, tetrabutylammonium chloride 1.2-
3.75%th, the ammonia palladium 1.25-2.4% of dichloro four, water 0.2%, mechanical strength 96.6-96.9%, 3~6mm of granularity（97-97.5%）, accumulation
Density 500-505g/l.
（2）Ultralow mercury catalyst prepared by the present invention, catalyst service life length, up to 8500 hours.
（3）Catalyst prepared by the present invention is used for vinyl chloride synthesis reaction, conversion of alkyne 99.90-99.91%, chloroethene
Alkene selectivity is 99.9-100%, and the yield of vinyl chloride is 94.2-94.5%.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
A kind of preparation method of the ultralow mercury catalyst for VCM synthesis of embodiment 1
The preparation of step 1, activated carbon
（1）The selection of feed coal
The feed coal is anthracite, and moisture 6%, content of ashes 8.5%, volatile matter content 14.5%, fixed carbon contains
Measure as 71%.
（2）The deliming of feed coal
By smokeless coal grinding, 100 mesh sieves are crossed, coal dust are put into 30ppm polymeric aluminum chlorides solution, strong agitation, rotating speed is
5000r/min, after 2 minutes, rotating speed is reduced to 500r/min, and after stirring 10 minutes, filtering, distillation is washed to filtrate in neutrality；
Adding in polyacrylamide solution, polyacrylamide concentration is 0.5ppm, and rotating speed is 400 r/min, after stirring 10 minutes, filtering,
It is in neutral that distillation, which is washed to filtrate, and content of ashes is 1.5% after deliming.
（3）Charing
By by the coal dust of deliming, in the case where N2 flows are 20ml/mim protection, carbonized, carbonization temperature initial temperature is
300 DEG C, with 2 DEG C/min heating rate, 400 DEG C are risen to, carbonizes 2.5 hours, obtains carbonized material.
（4）Once activate
By the coal dust acid dip after charing, described acid, including：60% phosphoric acid, tartaric acid, stearic acid, mass ratio 3:
1:2, acid with coal dust in fixed carbon mass ratio be 3:1, soak 5 hours, wash, dry.
（5）Re-activation
Coal dust after once activating, it is placed in the mixed liquor of re-activation agent, soaks 2 hours, the re-activation agent is
Zinc chloride, bismuth chloride, magnesium chloride, plumbi nitras, mass ratio 3:2:1:1, the mass ratio of re-activation agent and fixed carbon is 1:
0.8, it is then 10ml/mim, at 480 DEG C in N2 flows, activates 2 hours.
（6）Post processing
Activated material come out of the stove cooling after be cooled to room temperature, be put into weight/mass percentage composition be 4% hydrochloric acid solution in soak 12 hours, steaming
Distilled water is rinsed to neutrality, drying.
The activated carbon iodine number 1250mg/g of preparation, methylene blue value 135mg/g, up to 97.5%, carbon tetrachloride adsorbs mesoporous
It is worth for 120%, moisture content 2%, ash 1.5%, fixed carbon content are 75%, mechanical strength 98%, bulk density 398g/L, specific surface area
For 1950m2/ g, average pore size 2.7-3.1nm.
The preparation of step 2, carrier
（1）Prepare hydrochloric acid solution
500 kilograms of the hydrochloric acid solution that mass fraction is 0.5% is prepared with high purity hydrochloric acid and desalted water, room temperature is standby；
（2）Handle activated carbon
100 kilograms of selected activated carbons are put into（1）Soak 30 minutes in the hydrochloric acid solution of preparation, during which made using circulating pump
Hydrochloric acid solution constantly flows, and then takes out filtering or is filtered dry with centrifuge drying dehydration, is dried extremely under 200 DEG C of temperature conditionss
Aqueous less than 3%, carrier is made.
Step 3, the preparation for cooperateing with accelerator adsorption liquid
15% hydrochloric acid solution of pH=3 is prepared with hydrochloric acid and desalted water, adds appropriate collaboration accelerator, cooperates with the quality of accelerator
Content is 10%, and collaboration accelerator includes：Zinc chloride, barium chloride, tetrabutylammonium chloride, the ammonia palladium of dichloro four, mass ratio are：2:
1:1:2。
Step 4, absorption
（1）Gas Phase Adsorption mercury chloride
A, pre-treatment
Activated carbon by pretreatment is fitted into adsorbent bed, high-purity mercury chloride is subjected to heating and gasifying, the mercury chloride of gas phase
Enter in the adsorbent bed equipped with activated carbon, first with nitrogen purge system, discharge the foreign gases such as oxygen, carbon dioxide,
B, first stage Gas Phase Adsorption
Control pressure is 0.6MPa, and temperature is 540 DEG C, mass space velocity 7h-1, adsorbent bed upper end is equipped with condenser, condensate liquid
Reenter adsorbent bed after being regasified to be adsorbed, after adsorbing 15min；
C, second stage Gas Phase Adsorption
Decompression processing is carried out, pressure is 0.4MPa in adsorbent bed after decompression, and temperature is 420 DEG C, mass space velocity 8h-1, absorption
10min；
D, phase III Gas Phase Adsorption
Boosting processing is carried out again, and pressure is 0.7MPa in adsorbent bed after boosting, and temperature is 560 DEG C, mass space velocity 6h-1, absorption
5min, as a circulation, after the circulation is completed, the circulation is repeated, during which detects the Hg chloride content of charcoal absorption,
The content for controlling mercury chloride is 1.0%, stops absorption.
（2）Liquid phase adsorption cooperates with accelerator
A, immersion absorption
Absorbent charcoal carrier after Gas Phase Adsorption mercury chloride is put into the collaboration accelerator adsorption liquid that step 3 is prepared, it is living
Property high-area carbon and adsorption liquid mass ratio be 1:5, soaked 2 hours under 120 DEG C of temperature conditionss, during which make suction using circulating pump
Attached solution constantly flows, and then takes out filtering or is filtered dry with centrifuge drying dehydration, baking oven is put into, in 110 DEG C of temperature conditionss
Lower drying is to aqueous less than 0.2%；
B, vacuum infiltration adsorbs
Then will be placed again into by soaking the absorbent charcoal carrier of absorption in collaboration accelerator adsorption liquid, absorbent charcoal carrier and absorption
The mass ratio of liquid is 1:4, place into stainless-steel vacuum tank, vacuumized with vavuum pump, kept after reaching -0.035MPa pressure
30s, then recover to normal pressure, 5min is soaked under normal pressure, filtering is then taken out or is filtered dry with centrifuge drying dehydration, is put into
Baking oven, dried under 110 DEG C of temperature conditionss to aqueous less than 0.2%, ultralow mercury catalyst is made.
Ultralow mercury catalyst prepared by the present invention, the adsorbing chlorinated mercury in activated carbon center, obtained ultralow mercury catalyst
By weight percentage, chloride containing mercury 0.93%, zinc chloride 2.4%, barium chloride 1.2%, tetrabutylammonium chloride 1.2%, the ammonia of dichloro four
Palladium 2.4%, water 0.2%, mechanical strength 96.6%, 3~6mm of granularity（97%）, bulk density 500g/l.
A kind of preparation method of the ultralow mercury catalyst for VCM synthesis of embodiment 2
Using the preparation method of embodiment 1, the parameter of change is as follows：
Step 3, the preparation for cooperateing with accelerator adsorption liquid
16% hydrochloric acid solution of pH=2.5 is prepared with hydrochloric acid and desalted water, adds appropriate collaboration accelerator, cooperates with the matter of accelerator
It is 12% to measure content, and collaboration accelerator includes：Zinc chloride, barium chloride, tetrabutylammonium chloride, the ammonia palladium of dichloro four, mass ratio are：
2:2:3:1。
Step 4, absorption
（1）Gas Phase Adsorption mercury chloride
A, pre-treatment
It will be fitted into by absorbent charcoal carrier in adsorbent bed, and high-purity mercury chloride will be subjected to heating and gasifying, the mercury chloride of gas phase enters
Into the adsorbent bed equipped with activated carbon, first with the foreign gas such as nitrogen purge system, discharge oxygen, carbon dioxide；
B, first stage Gas Phase Adsorption
Then control pressure is 0.7MPa, and temperature is 560 DEG C, mass space velocity 7h-1, adsorbent bed upper end is equipped with condenser, cold
Lime set reenters adsorbent bed after being regasified and adsorbed, and adsorbs 15min；
C, second stage Gas Phase Adsorption
Decompression processing is carried out, pressure is 0.5 MPa in adsorbent bed after decompression, and temperature is 440 DEG C, mass space velocity 8h-1, absorption
10min；
D, phase III Gas Phase Adsorption
Boosting processing is carried out again, and pressure is 0.8 MPa in adsorbent bed after boosting, and temperature is 570 DEG C, mass space velocity 6h-1, inhale
Attached 5min, as a circulation, after the circulation is completed, the circulation is repeated, the mercury chloride for during which detecting charcoal absorption contains
Amount, the content for controlling mercury chloride are 1.1%.
（2）Liquid phase adsorption cooperates with accelerator
A, immersion absorption
Absorbent charcoal carrier after Gas Phase Adsorption mercury chloride is put into the collaboration accelerator adsorption liquid that step 3 is prepared, it is living
Property high-area carbon and adsorption liquid mass ratio be 1:5, soaked 2 hours under 125 DEG C of temperature conditionss, during which make suction using circulating pump
Attached solution constantly flows, and then takes out filtering or is filtered dry with centrifuge drying dehydration, baking oven is put into, in 110 DEG C of temperature conditionss
Lower drying is to aqueous less than 0.2%；
B, vacuum infiltration adsorbs
Then will be placed again into by the absorbent charcoal carrier for soaking absorption in the collaboration accelerator adsorption liquid that step 3 is prepared, activity
The mass ratio of high-area carbon and adsorption liquid is 1:5, place into stainless-steel vacuum tank, vacuumized with vavuum pump, reach -0.038MPa
30s is kept after pressure, then is recovered to normal pressure, soaks 5min under normal pressure, then takes out filtering or with centrifuge drying dehydration
It is filtered dry, is put into baking oven, is dried under 110 DEG C of temperature conditionss to aqueous less than 0.2%, ultralow mercury catalyst is made.
Ultralow mercury catalyst prepared by the present invention, the adsorbing chlorinated mercury in activated carbon center, obtained ultralow mercury catalyst
By weight percentage, chloride containing mercury 1.0%, zinc chloride 2.5%, barium chloride 2.5%, tetrabutylammonium chloride 3.75%, the ammonia of dichloro four
Palladium 1.25%, water 0.2%, mechanical strength 96.9%, 3~6mm of granularity（97.5%）, bulk density 505g/l.
3 above-mentioned catalyst of embodiment is used for vinyl chloride synthesis reaction
（1）Loading catalyst catalyst
Check that reactor is inside and outside without leak source before loading catalyst catalyst, tubulation inwall is clean, dry, no-sundries；This is sent out
Bright catalyst is encased in each tubulation of reactor immediately after opening packaging, and loading catalyst will be completed in 0.5h, guard against tide
It is wet.
（2）Preheating
It is passed through 90~100 DEG C of drying HCl, 7~8m of speed control3/ h, continuous 8~10h, during which every 2h by reactor bottom
Put acid once.
（3）Synthesis vinyl chloride thereof is reacted
The molar ratio of acetylene, hydrogen chloride is controlled 1：1.1~1：1.3（100% purity）, preheated temperature is up to more than 90 DEG C
Mixed gas be passed through reactor, culture period 1 month, acetylene gas intake, control temperature are adjusted according to reactor cooling capacity
Degree is between 110~125 DEG C；After culture period terminates, acetylene gas intake is adjusted according to reactor cooling capacity（30~50h-1）, reaction temperature is controlled at 130 DEG C.
Catalyst of the present invention is used for vinyl chloride synthesis reaction, and conversion of alkyne reaches 99.90-99.91%, vinyl chloride selectivity
Up to 99.9-100%, the yield of vinyl chloride reaches 94.2-94.5%, catalyst service life length, up to 8500 hours.
" mass space velocity " of the present invention, is defined as：The mass flow of mercury chloride（㎏·h-1）The quality of/activated carbon
（kg）.
Unless otherwise indicated, the percentage employed in the present invention is percetage by weight, ratio of the present invention,
For mass ratio.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The skill of the industry
For art personnel it should be appreciated that the present invention is not limited to the above embodiments, described in above-described embodiment and specification is explanation
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (2)
- A kind of 1. preparation method of the ultralow mercury catalyst of catalyzing acetylene and hydrogen chloride synthesis vinyl chloride, it is characterised in that：It is described Preparation method, include preparation, the absorption of activated carbon, the absorption includes Gas Phase Adsorption mercury chloride and liquid phase adsorption collaboration promotes Agent；The liquid phase adsorption, including immersion absorption, the immersion absorption, soak 2 hours under 120-125 DEG C of temperature conditionss, Dried under 110 DEG C of temperature conditionss to aqueous less than 0.2%；The liquid phase adsorption, including vacuum infiltration absorption, vacuum infiltration absorption, are vacuumized, reach -0.035 ~ - 30s is kept after 0.038MPa pressure, then is recovered to normal pressure, soaks 5min under normal pressure.
- 2. the preparation side of the ultralow mercury catalyst of a kind of catalyzing acetylene according to claim 1 and hydrogen chloride synthesis vinyl chloride Method, it is characterised in that：The Gas Phase Adsorption mercury chloride includes first stage Gas Phase Adsorption, the first stage Gas Phase Adsorption, and control pressure is 0.6-0.7MPa, temperature are 540-560 DEG C, mass space velocity 7h-1, adsorb 15min；The Gas Phase Adsorption mercury chloride includes second stage Gas Phase Adsorption, and the second stage Gas Phase Adsorption, being depressurized to pressure is 0.4-0.5 MPa, temperature are 420-440 DEG C, mass space velocity 8h-1, adsorb 10min；The Gas Phase Adsorption mercury chloride includes phase III Gas Phase Adsorption, and the phase III Gas Phase Adsorption, boosting to pressure is 0.7-0.8 MPa, temperature are 560-570 DEG C, mass space velocity 6h-1, adsorb 5min.
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| CN110841666A (en) * | 2019-12-02 | 2020-02-28 | 新晃新中化工有限责任公司 | Preparation method of ultralow-mercury catalyst for vinyl chloride synthesis |
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