NL174344B - PROCESS FOR PREPARING A MIXTURE OF CATECHOL AND HYDROQUINONE. - Google Patents
PROCESS FOR PREPARING A MIXTURE OF CATECHOL AND HYDROQUINONE.Info
- Publication number
- NL174344B NL174344B NLAANVRAGE7209868,A NL174344DA NL174344B NL 174344 B NL174344 B NL 174344B NL 174344D A NL174344D A NL 174344DA NL 174344 B NL174344 B NL 174344B
- Authority
- NL
- Netherlands
- Prior art keywords
- catechol
- hydroquinone
- preparing
- mixture
- Prior art date
Links
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 title 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 title 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 title 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Emergency Lowering Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1951A0014650 DE975231C (en) | 1951-12-05 | 1951-12-05 | Articulated cap connection |
Publications (1)
Publication Number | Publication Date |
---|---|
NL174344B true NL174344B (en) |
Family
ID=6923259
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NLAANVRAGE7209868,A NL174344B (en) | 1951-12-05 | PROCESS FOR PREPARING A MIXTURE OF CATECHOL AND HYDROQUINONE. | |
NL88621D NL88621C (en) | 1951-12-05 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL88621D NL88621C (en) | 1951-12-05 |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE975231C (en) |
FR (1) | FR1067366A (en) |
GB (1) | GB712963A (en) |
NL (2) | NL88621C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE942322C (en) * | 1954-03-16 | 1956-05-03 | Ulrich Wichmann | Articulated connection of caps |
US2915328A (en) * | 1957-07-08 | 1959-12-01 | Hugh Wood And Company Ltd | Bars for supporting the roof in mines and for like purposes |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE481680A (en) * | ||||
BE475032A (en) * | 1946-08-28 | |||
DE803992C (en) * | 1949-07-03 | 1951-04-16 | Wilhelm Reppel | Cap made of juxtaposed links for mining, especially longwall mining |
DE801717C (en) * | 1949-07-12 | 1951-01-22 | Mannesmann Ag | Cap connector |
-
0
- NL NLAANVRAGE7209868,A patent/NL174344B/en unknown
- NL NL88621D patent/NL88621C/xx active
-
1951
- 1951-12-05 DE DE1951A0014650 patent/DE975231C/en not_active Expired
-
1952
- 1952-12-02 FR FR1067366D patent/FR1067366A/en not_active Expired
- 1952-12-03 GB GB3066152A patent/GB712963A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1067366A (en) | 1954-06-15 |
GB712963A (en) | 1954-08-04 |
DE975231C (en) | 1961-10-12 |
NL88621C (en) |
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