GB703418A - Manufacture of vanillin - Google Patents
Manufacture of vanillinInfo
- Publication number
- GB703418A GB703418A GB1655/51A GB165551A GB703418A GB 703418 A GB703418 A GB 703418A GB 1655/51 A GB1655/51 A GB 1655/51A GB 165551 A GB165551 A GB 165551A GB 703418 A GB703418 A GB 703418A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- sulphite
- vanillin
- air
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
- C07C47/575—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings containing ether groups, groups, groups, or groups
- C07C47/58—Vanillin
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
- C07C39/04—Phenol
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
A method for producing vanillin from a lignin-containing waste liquor from a wood pulping process which liquor has been rendered alkaline, comprises subjecting the alkaline liquor to the action of air or oxygen at a temperature above about 200 DEG C. and a pressure above about 1,000 lb. per sq. in. for a time not exceeding about 10 minutes, cooling the treated liquor and separating vanillin therefrom. The starting material may be an alkaline waste sulphite liquor or black liquor from the Kraft process or soda pulping process. The process may be carried out continuously using a reaction vessel through which the liquor flows as a thin film and has a large surface exposed to the air passing through the reactor. Generally, the liquor or the air or oxygen or both are heated prior to introduction into the reaction vessel. Adiabatic compression of the air may be employed if desired. Gaseous products and oxidized liquor are withdrawn continuously from the reaction at a rate such that the liquor remains in the reaction zone for not more than 10 minutes and the latter is cooled as rapidly as possible, e.g. by sudden reduction of pressure and evaporation of part of the water. The vanillin may be recovered from the processed liquor, e.g. by extraction with a water immiscible alcohol, i.e., n-butanol, and purified by vacuum distillation and recrystallization. Nitrogen may be recovered from the gaseous effluent. The waste liquor may comprise sulphite liquor from the pulping of various species of wood, such as spruce, hemlock and balsam. Sulphite liquors from deciduous woods, e.g. aspen or birch give syringic aldehyde in addition to vanillin. Sulphite waste liquors in which the sugars have been fermented to alcohol or for propagating yeast may be used as starting material. In the example a continuous process using air and alkaline sulphite waste liquor as starting materials is described. Specification 490,646 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US703418XA | 1950-05-04 | 1950-05-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB703418A true GB703418A (en) | 1954-02-03 |
Family
ID=22094704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1655/51A Expired GB703418A (en) | 1950-05-04 | 1951-01-22 | Manufacture of vanillin |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB703418A (en) |
-
1951
- 1951-01-22 GB GB1655/51A patent/GB703418A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2022654A (en) | Treatment of cellulosic materials | |
MX4260A (en) | PROCESS TO PRODUCE LIGNIN, PRODUCT OBTAINED AND APPARATUS FOR FIBERING VEGETABLE WOODEN PULP. | |
US2060068A (en) | Manufacture of cellulose from lignocellulosic materials | |
US2926114A (en) | Manufacture of cellulosic products | |
ES431294A1 (en) | Process for the obtention of fermentable powdered syrup and alphacellulose from xerophyte plants | |
US2851468A (en) | Preparation of hydroxymethylfurfural from cellulosic materials | |
GB1434232A (en) | Method of producing cellulose pulp by means of oxygen gas delignification | |
US2022664A (en) | Manufacture of cellulose from lignocellulose materials | |
DE3160951D1 (en) | Process to obtain a concentrated stillage during the production of alcohol from starch or starch-containing raw materials | |
GB703418A (en) | Manufacture of vanillin | |
US2041745A (en) | Manufacture of cellulosic prod | |
US3790637A (en) | Process for the manufacture of vanillin from sulfite waste liquor | |
US3522230A (en) | Process for separating lignin from vegetable material using a mixture of triethyleneglycol and arylsulfonic acids | |
US3266933A (en) | Process for the extraction of aqueous sugar solution resulting from the hydrolysis of lignocellulosic material | |
US2598311A (en) | Manufacture of vanillin | |
US1888935A (en) | Process of producing ethyl alcohol from wood or other cellulose containing materials | |
SE7612248L (en) | BOILING OF LIGNOCELLULOSE-MATERIALS | |
US2964449A (en) | Method of processing lignified cellulose | |
US2186893A (en) | Disintegration of vegetable fibrous materials | |
US938308A (en) | Process of producing from ligno-cellulose fermentable sugar. | |
DE901773C (en) | Process for the production of vanillin | |
US1364418A (en) | Recovery of organic products from larch | |
GB1566044A (en) | Process for the preparation of furfural | |
US2816832A (en) | Making dimethyl sulfide from pulp mill spent liquors | |
US1855464A (en) | Method of producing fermentable sugars and alcohol from wood |