GB224509A - A process for the treatment of sulphite-cellulose waste liquor - Google Patents
A process for the treatment of sulphite-cellulose waste liquorInfo
- Publication number
- GB224509A GB224509A GB23227/24A GB2322724A GB224509A GB 224509 A GB224509 A GB 224509A GB 23227/24 A GB23227/24 A GB 23227/24A GB 2322724 A GB2322724 A GB 2322724A GB 224509 A GB224509 A GB 224509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- atmospheres
- sawdust
- salts
- temperatures
- 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
-
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Acetic acid and methyl alcohol are evolved when waste sulphite-cellulose liquor mixed with salts such as magnesium, calcium or sodium chloride is heated to temperatures between 170 DEG and 180 DEG C., a pressure of from 5-8 atmospheres being employed. The carbon, which separates during the process, is rendered readily filterable by addition of wood waste, shavings, sawdust bark, &c. to the initial mixture. The solution of salts may be returned to the process. Mineral acids may be added to the original mixture. In an example waste sulphite-cellulose liquor, sawdust and "potash-end liquor" are heated to 180 DEG C. and the pressure raised to 6 atmospheres. The Specification as open to inspection under Sect. 91 (3) (a) is not limited to the use of pressure, and temperatures from 150-200 DEG C. may be employed. This subject-matter does not appear in the Specification as accepted.ALSO:Sulphur dioxide is evolved when waste sulphite-cellulose liquor mixed with salts such as magnesium, calcium or sodium chloride is heated to temperatures between 170 DEG and 180 DEG C., a pressure of from 5-8 atmospheres, being employed. The yield is increased by addition of mineral acids to the mixture. The carbon also resulting from the process is rendered readily filterable by addition of wood waste, shavings, sawdust, bark, &c. to the initial mixture. The solution of salts may be returned to the process. In an example waste sulphite-cellulose liquor, sawdust and "potash-end liquor" are heated to 180 DEG C. and the pressure raised to 6 atmospheres. The Specification as open to inspection under Sect. 91 (3) (a) is not limited to the use of pressure and temperatures from 150-200 DEG C. may be employed. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE224509X | 1923-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB224509A true GB224509A (en) | 1925-09-10 |
Family
ID=5856316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23227/24A Expired GB224509A (en) | 1923-11-06 | 1924-10-01 | A process for the treatment of sulphite-cellulose waste liquor |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR587383A (en) |
| GB (1) | GB224509A (en) |
| NL (1) | NL16841C (en) |
-
0
- NL NL16841D patent/NL16841C/xx active
-
1924
- 1924-09-30 FR FR587383D patent/FR587383A/en not_active Expired
- 1924-10-01 GB GB23227/24A patent/GB224509A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR587383A (en) | 1925-04-17 |
| NL16841C (en) |
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