GB686250A - A process for digesting straw or similar vegetable material - Google Patents
A process for digesting straw or similar vegetable materialInfo
- Publication number
- GB686250A GB686250A GB5723/50A GB572350A GB686250A GB 686250 A GB686250 A GB 686250A GB 5723/50 A GB5723/50 A GB 5723/50A GB 572350 A GB572350 A GB 572350A GB 686250 A GB686250 A GB 686250A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lime
- digestion
- lye
- straw
- water
- 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
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/08—Mechanical or thermomechanical pulp
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
In a process for digesting straw or similar vegetable material in a solution or suspension of lime such as lime water or lime milk substantially at or below atmospheric pressure and at a temperature not substantially exceeding 100 DEG C., the waste lime lye obtained after completion of the digestion is utilized, together with water and fresh lime, as a digestion liquid for the digestion of new quantities of straw or similar vegetable material. The amount of lye re-used may be about 30-50 per cent of the water freshly added. Preferably the lime is added in successive portions during the process. The lye may circulate through the digester in either direction. For each kilogram of straw treated, 2-4 kg. of lye from a preceding digestion, 6-8 kg. fresh water and 100 g. CaO may be used. The time of treatment is from 1.5 to 3 hours and the preferred temperature between 95 and 100 DEG C. The resulting pulp may be washed and/or treated further. In an example, 100 kg. of cut straw (calculated as air dry) is introduced into a digester and 400 kg. of lye from a preceding digestion and 800 kg. fresh water are supplied at 80 DEG C. The liquor is pumped from the bottom to the top of the digester, and is heated to 95 DEG C. 10 kg. lime (calculated as CaO) is added as a lime cream and the temperature raised to 100 DEG C. After the addition of the lime, the temperature is maintained at 95-100 DEG C. for an hour to complete the digestion. Specification 671,251 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE686250X | 1949-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB686250A true GB686250A (en) | 1953-01-21 |
Family
ID=20315057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5723/50A Expired GB686250A (en) | 1949-03-12 | 1950-03-07 | A process for digesting straw or similar vegetable material |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE934388C (en) |
| GB (1) | GB686250A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015150841A1 (en) * | 2014-03-31 | 2015-10-08 | Marinko MIKULIC | A continuous process for production of cellulose pulp from grass-like plant feedstock |
| US20170268168A1 (en) * | 2016-02-29 | 2017-09-21 | Shandong Tralin Paper Co., Ltd. | Method for Continuously Cooking Grass Raw Materials and Device |
| CN112458777A (en) * | 2020-11-05 | 2021-03-09 | 江西中竹生物质科技有限公司 | Method for manufacturing rice straw pulp by ultrasonic wave |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1042371B (en) * | 1952-03-31 | 1958-10-30 | Herbert Kurth | Process for the production of powdery lignin for the production of molding compounds in the production of pulp products |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE546777C (en) * | 1927-12-08 | 1932-03-18 | Arne Vesterlid | Process for the production of insulation and construction material |
| GB327407A (en) * | 1929-01-02 | 1930-04-02 | Henry Charles Morris Ingeberg | Material for insulation and construction purposes, and process for the manufacture of same |
| FR768802A (en) * | 1933-02-18 | 1934-08-14 | Gewerkschaft Aufbau | Molded bodies, and in particular plates of fibrous materials, and process for their manufacture |
| NL42537C (en) * | 1933-12-08 | |||
| GB428714A (en) * | 1934-02-15 | 1935-05-17 | Gewerkschaft Aufbau | Improvements in and relating to the production of plates and other moulded bodies from fibrous materials |
| US2128782A (en) * | 1935-12-14 | 1938-08-30 | Ruetgerswerke Ag | Process of manufacaturing noninflammable articles of organic fibrous materials |
-
1949
- 1949-12-31 DE DEO212A patent/DE934388C/en not_active Expired
-
1950
- 1950-01-17 DE DEO242A patent/DE814094C/en not_active Expired
- 1950-03-07 GB GB5723/50A patent/GB686250A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015150841A1 (en) * | 2014-03-31 | 2015-10-08 | Marinko MIKULIC | A continuous process for production of cellulose pulp from grass-like plant feedstock |
| US9777429B2 (en) | 2014-03-31 | 2017-10-03 | Marinko Mikulic | Continuous process for production of cellulose pulp from grass-like plant feedstock |
| US20170268168A1 (en) * | 2016-02-29 | 2017-09-21 | Shandong Tralin Paper Co., Ltd. | Method for Continuously Cooking Grass Raw Materials and Device |
| US10053816B2 (en) * | 2016-02-29 | 2018-08-21 | Shandong Tralin Paper Co., Ltd. | Method for continuously cooking grass raw materials and device |
| CN112458777A (en) * | 2020-11-05 | 2021-03-09 | 江西中竹生物质科技有限公司 | Method for manufacturing rice straw pulp by ultrasonic wave |
Also Published As
| Publication number | Publication date |
|---|---|
| DE934388C (en) | 1955-10-20 |
| DE814094C (en) | 1951-09-20 |
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