NL57141C - - Google Patents
Info
- Publication number
- NL57141C NL57141C NL57141DA NL57141C NL 57141 C NL57141 C NL 57141C NL 57141D A NL57141D A NL 57141DA NL 57141 C NL57141 C NL 57141C
- Authority
- NL
- Netherlands
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
- C07D307/48—Furfural
- C07D307/50—Preparation from natural products
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE872408X | 1940-03-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL57141C true NL57141C (en) |
Family
ID=6816014
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL56149D NL56149C (en) | 1940-03-21 | ||
NL57141D NL57141C (en) | 1940-03-21 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL56149D NL56149C (en) | 1940-03-21 |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR872408A (en) |
NL (2) | NL57141C (en) |
-
0
- NL NL56149D patent/NL56149C/xx active
- NL NL57141D patent/NL57141C/xx active
-
1941
- 1941-05-21 FR FR872408D patent/FR872408A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL56149C (en) | |
FR872408A (en) | 1942-06-08 |