CN203881726U - Gas chromatograph for gas analysis in refinery plant - Google Patents
Gas chromatograph for gas analysis in refinery plant Download PDFInfo
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- CN203881726U CN203881726U CN201420179396.6U CN201420179396U CN203881726U CN 203881726 U CN203881726 U CN 203881726U CN 201420179396 U CN201420179396 U CN 201420179396U CN 203881726 U CN203881726 U CN 203881726U
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Abstract
The utility model discloses a gas chromatograph for gas analysis in a refinery plant. The gas chromatograph comprises two six-way valves, a twelve-way valve, two three-way stop valves, four chromatographic columns, two quantifying pipes, two damping valves and a TCD. Based on the combination of the three-way stop valves, the six-way valves, the twelve-way valve, the damping valves and the single TCD, the analysis of gas components in the refinery plant is realized by virtue of a valve column switching technology. The gas chromatograph can be applied to the analysis of the gas components in the refinery plants such as oil refinery plants, universities and colleges and the like. The gas chromatograph is convenient to operate, strong in practicability, simple in structure and low in cost.
Description
Technical field
The utility model relates to a kind of analytical instrument of analyzing catalytic cracking production, relates in particular to a kind of gas chromatograph of analyzing for refinery gas.
Background technology
Along with the development of oil refining process and the raising of working depth, in process, the refinery gas output of by-product also increases thereupon, and the composition of research refinery gas is the basis of research oil refining process and comprehensive utilization refinery gas.But the complicated components of refinery gas, compartment analysis is difficulty comparatively.Early stage adopt many chromatograms, by associated result normalized Analysis refinery gas composition, but its analysis efficiency is low, analysis cost high and resultant error large (Speciality Petrochemicals, 2013,30 (5): 83 ~ 86).The eighties in last century, first Hewlett-Packard has developed multidimensional gas chromatograph (the Guangdong chemical industry of the four valve five packed column double T CD detecting devices that are applied to refinery gas analysis, 2012,39 (228): 37 ~ 38), utilize valve handoff technique to realize separation and detection process, greatly reduced analytical error and reduced analysis cost.Afterwards, in succession there is the multidimensional gas chromatographic analytic system of the combination of capillary column-packed column or all woolen buttress shaft, and in the configuration of detecting device, occurred the example combinations (analytical chemistry of multiple TCD and FID, 2000,28 (10): 1263 ~ 1266; Chemical analysis metering, 2012,21 (5): 67 ~ 69).Although the triple channel gas chromatography system of the four valve seven post double T CD+TCD detecting devices that Agilent company releases is the most perfect refinery gas analytic system up to now: (1) first passage, adopts ten logical sample introduction back-flushing valves, two-way gas, two root chromatogram columns analysis hydrogen; (2) second channel, adopts ten logical sample introduction back-flushing valves, two-way gas, two root chromatogram columns to analyze light hydrocarbon component; (3) third channel, adopts ten logical sample introduction back-flushing valves, six logical isolation valves, two-way gas, three chromatogram column analysis permanent gases.But it needs six road gases, seven root chromatogram columns, three detecting devices, configuration is very complicated, and cost of manufacture is high.What therefore, be most widely used at present is still refinery gas analytic system (petrochemical complex, 2004,33 (10): 983 ~ 986 of three valve four post TCD+FID dual-detectors; Modern instrument, 2004,6:48 ~ 51; Jiangxi petrochemical complex, 2004,16 (1): 23 ~ 26), this system can successful compartment analysis CO
2, H
2, CH
4, O
2, N
2, CO, C1 ~ C5, a small amount of C6
+.But its Reng Xu tri-road gases, TCD+FID dual-detector just can complete the analysis to refinery gas.
Utility model content
The purpose of this utility model is the deficiency that makes up prior art, a kind of gas chromatograph of analyzing for refinery gas is provided, adopt three-way cut-off valve, six-way valve, ten two-port valves, orifice valve and single TCD detector combination, only depend on valve handoff technique, single temperature programme to realize the analysis to refinery gas component, comprise CO
2, H
2, O
2, N
2, CO, C1 ~ C5 and a small amount of C6
+the analysis of component.
The purpose of this utility model is achieved in that
A kind of gas chromatograph of analyzing for refinery gas, feature is that this chromatograph comprises two six-way valves, ten two-port valves, two three-way cut-off valves, four root chromatogram columns, two quantity tubes, two orifice valves and TCD detecting device, wherein, the first passage of first six-way valve is connected with first three-way cut-off valve right wing, the Road of first three-way cut-off valve is connected with carrier gas line, the second channel of first six-way valve is connected with the first passage of ten two-port valves, the 3rd of first six-way valve, the 6th passage is connected with the two ends of first quantity tube respectively, the four-way of first six-way valve is sample inlet, the Five-channel of first six-way valve is connected with the tenth passage of ten two-port valves, the second channel of ten two-port valves is connected with one end of the first root chromatogram column, the other end of the first root chromatogram column is connected with the left end of first orifice valve, first orifice valve right-hand member is connected with second three-way cut-off valve Zuo road, the third channel of ten two-port valves is connected with first three-way cut-off valve Zuo road, the four-way of ten two-port valves is connected with one end of the second root chromatogram column, the 5th of ten two-port valves, the two ends that the 8th passage cuts blowback chromatographic column in advance with the 3rd root chromatogram column are respectively connected, the 7th of ten two-port valves, the gateway that the 6th passage is assisted gas, the 9th of ten two-port valves, the 12 passage is connected with the two ends of second quantity tube respectively, the outlet that the 11 passage of ten two-port valves is sample, the other end of the second root chromatogram column is connected with the first passage of second six-way valve, second of second six-way valve, third channel is connected with the two ends of the 4th root chromatogram column respectively, the four-way of second six-way valve is connected with the right wing of second three-way cut-off valve, the 5th of second six-way valve, the 6th passage is connected with the two ends of second orifice valve respectively, the Road of second three-way cut-off valve is connected with TCD detecting device.
Pipeline between described six-way valve, ten two-port valves, three-way cut-off valve, quantity tube, sample gateway, orifice valve and six-way valve and ten two-port valves is all placed in heated at constant temperature case, described four root chromatogram columns are placed in post case, and the temperature control scope of heated at constant temperature case and post case is room temperature ~ 350 DEG C.
In four described root chromatogram columns, the first root chromatogram column is for analyzing C1 ~ C5 and a small amount of C6
+the Al of component
2o
3the capillary chromatographic column of carrier, the second root chromatogram column is for Analysis for CO
2propak Q capillary chromatographic column, the 3rd root chromatogram column is for for cutting in advance blowback C2
+the Propak Q capillary chromatographic column of component, the 4th is for analyzing H
2, O
2, N
2, CH
4, CO 5A molecular sieve capillary chromatographic column.
Described four root chromatogram columns also can be selected the chromatography column of identical filler.
Gas chromatograph of the present utility model only adopts two-way gas, a TCD detecting device, a temperature programme, realizes the analysis to gasoline, diesel catalytic cracking production hydrocarbon component switching time by variable valve, carries out data processing finally by chromatographic work station.
The making of gas chromatograph of the present utility model only need be reequiped the gas chromatograph of single injection port general on market and single TCD detecting device, above gas chromatograph, install a road purge gas and a heated at constant temperature case additional, the pipelines such as three-way cut-off valve, six-way valve, ten two-port valves, orifice valve and quantity tube are placed in to described heated at constant temperature case, adopt the 316 stainless steel pipelines of 1/16 inch the chromatographic column in post case to be connected on the relevant position of each valve in heated at constant temperature case, separately increase by a road blowback air.
Gas chromatograph of the present utility model is when to refinery gas component analysis, by switching three-way stop valve, ten two-port valves and six-way valve, at CO
2component enters the second root chromatogram column and C2 and above heavy constituent start blowback C2 and above heavy constituent still in the 3rd root chromatogram column time; When CO enters the 4th root chromatogram column and CO
2still in the time of the 3rd root chromatogram column, CO
2first entering detecting device through second orifice valve detects; Then, analyze the H being trapped in the 4th root chromatogram column
2, O
2, N
2, CH
4, the component such as CO; Finally analyze C1 ~ C5 light hydrocarbon component and a small amount of C6 by the first root chromatogram column
+component.
The utility model compared with prior art, has the following advantages:
(1) compare with the gas chromatograph of three valve four post TCD+FID dual-detectors of needs three road gases in the past, the utility model only needs the gas chromatograph of a configuration two-way gas, a TCD detecting device just can realize the analysis to refinery gas component.
(2) ten two-port valves are applied in modular valve blocks column chromatography system, substitute traditional six-way valve, the purposes such as centralized procurement sample and post selection, in one, have not only greatly been saved cost, and operation is also tending towards simplifying.
Gas chromatograph of the present utility model is particularly suitable for the analysis to refinery gas component such as refinery, universities and colleges, also can be used for analyzing other complicated gas composition by changing the operations such as chromatographic column, easy to operate, practical, simple in structure, with low cost.
Brief description of the drawings
Fig. 1 is the utility model holding state and analyzes C1 ~ C5 and a small amount of C6
+the structural representation of component;
Fig. 2 is that the utility model gathers CO
2, H
2, O
2, N
2, CH
4, CO component structural representation;
Fig. 3 is the separation of blowback of the present utility model, permanent gas component and removes CO
2the structural representation that outer permanent gas detects;
Fig. 4 is that the utility model detects CO
2structural representation;
Fig. 5 is that the utility model gathers C1 ~ C5 and a small amount of C6
+the structural representation of component;
Fig. 6 is the chromatogram of the utility model analysis of refinery gases component.
Embodiment
Consult Fig. 1, the utility model comprises left six-way valve, ten two-port valves, quantity tube 9 and quantity tube 10, one for cutting in advance blowback chromatographic column 25, right six-way valve, three-way cut-off valve 7, three-way cut-off valve 8, chromatographic column 23, chromatographic column 24, chromatographic column 26, orifice valve 27 and orifice valve 28; Carrier gas and assisted gas are all selected high-purity helium; TCD detecting device is thermal conductivity cell detector general on market; When specific works, workstation can be selected chromatographic work station general on market, such as Zhejiang intelligence reaches N2000 or N3000.
In the utility model, the passage 1 of left six-way valve is connected with three-way cut-off valve 7 right wings, the Road of three-way cut-off valve 7 is connected with carrier gas line, left six-way valve passage 2 is connected with ten two-port valve passages 11, the passage 3 of left six-way valve is connected with the two ends of quantity tube 9 respectively with 6, left six-way valve passage 4 is sample inlet 29, left six-way valve passage 5 is connected with ten two-port valve passages 20, ten two-port valve passages 12 are connected with one end of chromatographic column 23, the other end of chromatographic column 23 is connected with one end of orifice valve 27, the other end of orifice valve 27 is connected with three-way cut-off valve 8 Zuo roads, ten two-port valve passages 13 are connected with three-way cut-off valve 7 Zuo roads, ten two-port valve passages 14 are connected with one end of chromatographic column 24, ten two-port valve passages 15 are connected with the two ends of chromatographic column 25 respectively with 18, the gateway that ten two-port valve passages 17 and 16 are assisted gas, ten two-port valve passages 19 are connected with the two ends of quantity tube 10 respectively with 22, ten two-port valve passages 21 are sample export 30, the other end of chromatographic column 24 is connected with right six-way valve passage 31, right six-way valve passage 32 is connected with one end of chromatographic column 26, the other end of chromatographic column 26 is connected with right six-way valve passage 33, right six-way valve passage 34 is connected with the right wing of three-way cut-off valve 8, right six-way valve passage 35 is connected with the two ends of orifice valve 28 respectively with 36, the Road of three-way cut-off valve 8 is connected with TCD detecting device, the signal of detecting device is processed through chromatographic work station.
Pipeline between described left six-way valve, right six-way valve, ten two-port valves, three-way cut-off valve, quantity tube, sample gateway and six-way valve and ten two-port valves is all placed in heated at constant temperature case, described four root chromatogram columns are placed in post case, and the temperature control scope of heated at constant temperature case and post case is room temperature ~ 350 DEG C.
In described chromatographic column, chromatographic column 23 is for analyzing C1 ~ C5 and a small amount of C6
+the Al of component
2o
3the capillary chromatographic column of carrier, selects HP-AL/S, and specification is 50 m (length) * 0.53 mm (external diameter) * 15 μ m (film); Chromatographic column 24 is for Analysis for CO
2propak Q capillary chromatographic column, select HP-PLOT/Q, specification is 30 m (length) * 0.53 mm (external diameter) * 40 μ m (film); Chromatographic column 25 is for cutting in advance blowback C2
+the Propak Q capillary chromatographic column of component, selects HP-PLOT/Q, and specification is 2 m (length) * 0.53 mm (external diameter) * 40 μ m (film); Chromatographic column 26 is for analyzing H
2, O
2, N
2, CH
4, CO 5A molecular sieve capillary chromatographic column, select HP-MOLESIEVE, specification is 30 m (length) * 0.53 mm (external diameter) * 25 μ m (film).
Embodiment
Consult Fig. 1, the utility model is in holding state or analyze C1 ~ C5 and a small amount of C6
+component, carrier gas He loop is: carrier gas inlet → three-way cut-off valve 7 Roads → three-way cut-off valve 7 right wings → left six-way valve passage 1 → left six-way valve passage 2 → ten two-port valve passage 11 → ten two-port valve passage 12 → chromatographic column 23 → orifice valve 27 → three-way cut-off valve 8 left road → three-way cut-off valve 8 Roads → TCD detecting devices; Sample loop is: left six-way valve passage 4 → left six-way valve passage 3 → quantity tube 9 → left six-way valve passage 6 → left six-way valve passage 5 → ten two-port valve passage 20 → ten two-port valve passage 19 → quantity tube 10 → ten two-port valve passage 22 → ten two-port valve passages 21; Blowback loop is: assisted gas entrance → ten two-port valve passage 16 → ten two-port valve passage 15 → chromatographic column 25 → ten two-port valve passage 18 → ten two-port valve passages 17; In post is selected, from three-way cut-off valve 7 to chromatographic column 24 to the detailed route of three-way cut-off valve 8 be again: left road → ten two-port valve of three-way cut-off valve 7 passage 13 → ten two-port valve passage 14 → chromatographic columns 24 → right six-way valve passage 31 → right six-way valve passage 32 → chromatographic column 26 → right six-way valve passage 33 → right six-way valve passage 34 → three-way cut-off valve 8 right wings; Orifice valve 28 loops are: right six-way valve passage 36 → orifice valve 28 → right six-way valve passage 35.
Consult Fig. 2, switch ten two-port valves and three-way cut-off valve 8 to position as shown in Figure 2 and realize CO
2, H
2, O
2, N
2, CH
4, the on-line sampling of CO component, carrier gas He loop is: carrier gas inlet → three-way cut-off valve 7 Roads → three-way cut-off valve 7 right wings → left six-way valve passage 1 → left six-way valve passage 2 → ten two-port valve passage 11 → ten two-port valve passage 22 → quantity tube 10 → ten two-port valve passage 19 → ten two-port valve passage 18 → chromatographic column 25 → ten two-port valve passage 15 → ten two-port valve passage 14 → chromatographic columns 24 → right six-way valve passage 31 → right six-way valve passage 32 → chromatographic column 26 → right six-way valve passage 33 → right six-way valve passage 34 → three-way cut-off valve, 8 right wings → three-way cut-off valve 8 Roads → TCD detecting devices, sample loop is: left six-way valve passage 4 → left six-way valve passage 3 → quantity tube 9 → left six-way valve passage 6 → left six-way valve passage 5 → ten two-port valve passage 20 → ten two-port valve passages 21, blowback loop is: assisted gas entrance → ten two-port valve passage 16 → ten two-port valve passages 17, in post is selected, from three-way cut-off valve 7 to chromatographic column 23 to the detailed route of three-way cut-off valve 8 be again: left road → ten two-port valve of three-way cut-off valve 7 passage 13 → ten two-port valve passage 12 → chromatographic column 23 → orifice valve 27 → three-way cut-off valve 8 left roads, orifice valve 28 loops are: right six-way valve passage 36 → orifice valve 28 → right six-way valve passage 35.
Consult Fig. 3, switch that separating of blowback, permanent gas component realized in ten two-port valves and three-way cut-off valve 7 to position as shown in Figure 3 and except CO
2outer permanent gas detects, and carrier gas He loop is: left road → ten two-port valve of carrier gas inlet → three-way cut-off valve 7 Roads → three-way cut-off valve 7 passage 13 → ten two-port valve passage 14 → chromatographic columns 24 → right six-way valve passage 31 → right six-way valve passage 32 → chromatographic column 26 → right six-way valve passage 33 → right six-way valve passage 34 → three-way cut-off valve, 8 right wings → three-way cut-off valve 8 Roads → TCD detecting device; Sample loop, blowback loop and orifice valve 28 same Fig. 1 in loop; In post is selected, from three-way cut-off valve 7 to chromatographic column 23 to the detailed route of three-way cut-off valve 8 be again: three-way cut-off valve 7 right wings → left six-way valve passage 1 → left six-way valve passage 2 → ten two-port valve passage 11 → ten two-port valve passage 12 → chromatographic column 23 → orifice valve 27 → three-way cut-off valve 8 left roads.
Consult Fig. 4, switch right six-way valve and realize CO position extremely as shown in Figure 4
2the detection of component, carrier gas He loop is: left road → ten two-port valve of carrier gas inlet → three-way cut-off valve 7 Roads → three-way cut-off valve 7 passage 13 → ten two-port valve passage 14 → chromatographic columns 24 → right six-way valve passage 31 → right six-way valve passage 36 → orifice valve 28 → right six-way valve passage 35 → right six-way valve passage 34 → three-way cut-off valve, 8 right wings → three-way cut-off valve 8 Roads → TCD detecting device; Sample loop and the same Fig. 1 in blowback loop; Detailed route from three-way cut-off valve 7 to chromatographic column 23 to three-way cut-off valve 8 in post is selected is: three-way cut-off valve 7 right wings → left six-way valve passage 1 → left six-way valve passage 2 → ten two-port valve passage 11 → ten two-port valve passage 12 → chromatographic column 23 → orifice valve 27 → three-way cut-off valve 8 left roads; Chromatographic column 26 loops are: right six-way valve passage 32 → chromatographic column 26 → right six-way valve passage 33.
Consult Fig. 5, switch left six-way valve, right six-way valve, three-way cut-off valve 7, three-way cut-off valve 8 to position as shown in Figure 5 and realize C1 ~ C5 and a small amount of C6
+the sampling of component, carrier gas He loop is: carrier gas inlet → three-way cut-off valve 7 Roads → three-way cut-off valve 7 right wings → left six-way valve passage 1 → left six-way valve passage 6 → quantity tube 9 → left six-way valve passage 3 → left six-way valve passage 2 → ten two-port valve passage 11 → ten two-port valve passage 12 → chromatographic column 23 → orifice valve 27 → three-way cut-off valve 8 left road → three-way cut-off valve 8 Roads → TCD detecting devices; Sample loop is: left six-way valve passage 4 → left six-way valve passage 5 → ten two-port valve passage 20 → ten two-port valve passage 19 → quantity tube 10 → ten two-port valve passage 22 → ten two-port valve passages 21; Blowback loop, orifice valve 28 loops, in post is selected from three-way cut-off valve 7 to chromatographic column 24 again to same Fig. 1 of detailed route of three-way cut-off valve 8.
As shown in Figure 6, the chromatogram of analysis of refinery gases component is realized under the following conditions: the temperature setting of heated at constant temperature case is set to 80 DEG C; The heating schedule of post case is 60 DEG C and stops 10 min, is warming up to 130 DEG C with 20 DEG C/min, stops 12 min, then is warming up to 150 DEG C with 25 DEG C/min, stops 30.7 min; In the time switching ten two-port valves and three-way cut-off valve 8 to position as shown in Figure 2, start to start chromatographic working procedure; After moving 0.23 min, chromatographic program switches ten two-port valves and three-way cut-off valve 7 to position as shown in Figure 3; After moving 2.6 min, chromatographic program switches right six-way valve position extremely as shown in Figure 4; After moving 3.6 min, chromatographic program switches right six-way valve position extremely as shown in Figure 3; After moving 9.8 min, chromatographic program switches left six-way valve, three-way cut-off valve 7, three-way cut-off valve 8 to position as shown in Figure 5; The left six-way valve of switching after chromatographic program moves 10.3 min is to position as shown in Figure 1 until chromatographic program end of run.
Claims (3)
1. a gas chromatograph of analyzing for refinery gas, it is characterized in that this chromatograph comprises two six-way valves, ten two-port valves, two three-way cut-off valves, four root chromatogram columns, two quantity tubes, two orifice valves and TCD detecting device, wherein, the first passage of first six-way valve is connected with first three-way cut-off valve right wing, the Road of first three-way cut-off valve is connected with carrier gas line, the second channel of first six-way valve is connected with the first passage of ten two-port valves, the 3rd of first six-way valve, the 6th passage is connected with the two ends of first quantity tube respectively, the four-way of first six-way valve is sample inlet, the Five-channel of first six-way valve is connected with the tenth passage of ten two-port valves, the second channel of ten two-port valves is connected with one end of the first root chromatogram column, the other end of the first root chromatogram column is connected with the left end of first orifice valve, first orifice valve right-hand member is connected with second three-way cut-off valve Zuo road, the third channel of ten two-port valves is connected with first three-way cut-off valve Zuo road, the four-way of ten two-port valves is connected with one end of the second root chromatogram column, the 5th of ten two-port valves, the two ends that the 8th passage cuts blowback chromatographic column in advance with the 3rd root chromatogram column are respectively connected, the 7th of ten two-port valves, the gateway that the 6th passage is assisted gas, the 9th of ten two-port valves, the 12 passage is connected with the two ends of second quantity tube respectively, the outlet that the 11 passage of ten two-port valves is sample, the other end of the second root chromatogram column is connected with the first passage of second six-way valve, second of second six-way valve, third channel is connected with the two ends of the 4th root chromatogram column respectively, the four-way of second six-way valve is connected with the right wing of second three-way cut-off valve, the 5th of second six-way valve, the 6th passage is connected with the two ends of second orifice valve respectively, the Road of second three-way cut-off valve is connected with TCD detecting device.
2. the gas chromatograph of analyzing for refinery gas according to claim 1, it is characterized in that the pipeline between described six-way valve, ten two-port valves, three-way cut-off valve, quantity tube, sample gateway, orifice valve and six-way valve and ten two-port valves is all placed in heated at constant temperature case, described four root chromatogram columns are placed in post case, and the temperature control scope of heated at constant temperature case and post case is room temperature ~ 350 DEG C.
3. the gas chromatograph of analyzing for refinery gas according to claim 1, is characterized in that in four described root chromatogram columns, and the first root chromatogram column is for analyzing C1 ~ C5 and a small amount of C6
+the Al of component
2o
3the capillary chromatographic column of carrier, the second root chromatogram column is for Analysis for CO
2propak Q capillary chromatographic column, the 3rd root chromatogram column is for for cutting in advance blowback C2
+the Propak Q capillary chromatographic column of component, the 4th is for analyzing H
2, O
2, N
2, CH
4, CO 5A molecular sieve capillary chromatographic column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179396.6U CN203881726U (en) | 2014-04-15 | 2014-04-15 | Gas chromatograph for gas analysis in refinery plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179396.6U CN203881726U (en) | 2014-04-15 | 2014-04-15 | Gas chromatograph for gas analysis in refinery plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881726U true CN203881726U (en) | 2014-10-15 |
Family
ID=51682212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420179396.6U Withdrawn - After Issue CN203881726U (en) | 2014-04-15 | 2014-04-15 | Gas chromatograph for gas analysis in refinery plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954715A (en) * | 2014-04-15 | 2014-07-30 | 华东师范大学 | Gas chromatograph for refinery gas analysis |
-
2014
- 2014-04-15 CN CN201420179396.6U patent/CN203881726U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954715A (en) * | 2014-04-15 | 2014-07-30 | 华东师范大学 | Gas chromatograph for refinery gas analysis |
| CN103954715B (en) * | 2014-04-15 | 2015-05-20 | 华东师范大学 | Gas chromatograph for refinery gas analysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141015 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |