ES2023766A6 - Calcium sulphate di:hydrate paper filler prepn. - Google Patents
Calcium sulphate di:hydrate paper filler prepn.Info
- Publication number
- ES2023766A6 ES2023766A6 ES9002562A ES9002562A ES2023766A6 ES 2023766 A6 ES2023766 A6 ES 2023766A6 ES 9002562 A ES9002562 A ES 9002562A ES 9002562 A ES9002562 A ES 9002562A ES 2023766 A6 ES2023766 A6 ES 2023766A6
- Authority
- ES
- Spain
- Prior art keywords
- prepn
- hydrate
- calcium sulphate
- paper filler
- filler
- 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 - Lifetime
Links
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title abstract 3
- 239000000945 filler Substances 0.000 title abstract 2
- 235000011132 calcium sulphate Nutrition 0.000 title 1
- 239000001175 calcium sulphate Substances 0.000 title 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 abstract 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 abstract 1
- 235000011128 aluminium sulphate Nutrition 0.000 abstract 1
- 229910052925 anhydrite Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000000887 hydrating effect Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/466—Conversion of one form of calcium sulfate to another
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The filler is made by hydrating CaSO4 in presence of 0.5 wt.% of Al2(SO4)3 and subsequently heating the reaction prod. to around 42 deg.C with saturated steam to complete the reacti'
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES9002562A ES2023766A6 (en) | 1990-10-09 | 1990-10-09 | Calcium sulphate di:hydrate paper filler prepn. |
| FR909014009A FR2667585B1 (en) | 1990-10-09 | 1990-11-12 | PROCESS AND CORRESPONDING INSTALLATION FOR OBTAINING A FILLER FOR THE PAPER INDUSTRY, BASED ON CALCIUM DIHYDRATE SULFATE AND ALUMINUM SULFATE. |
| IT02201290A IT1245725B (en) | 1990-10-09 | 1990-11-12 | PROCEDURE AND CORRESPONDING PLANT FOR OBTAINING A CHARGE FOR THE PAPER INDUSTRY BASED ON CALCIUM SULPHATE OF HYDRATE AND ALUMINUM SULPHATE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES9002562A ES2023766A6 (en) | 1990-10-09 | 1990-10-09 | Calcium sulphate di:hydrate paper filler prepn. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2023766A6 true ES2023766A6 (en) | 1992-02-01 |
Family
ID=8269112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES9002562A Expired - Lifetime ES2023766A6 (en) | 1990-10-09 | 1990-10-09 | Calcium sulphate di:hydrate paper filler prepn. |
Country Status (3)
| Country | Link |
|---|---|
| ES (1) | ES2023766A6 (en) |
| FR (1) | FR2667585B1 (en) |
| IT (1) | IT1245725B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2095184B1 (en) * | 1994-07-15 | 1997-09-01 | Compania General Yesera S A | PROCEDURE FOR THE OBTAINING OF A RADIAL LOAD ESPECIALLY FOR USE IN THE PAPER INDUSTRY, A LOAD PRODUCT FORMED BY CO-CRYSTALLIZATION OF ANHYDED CALCIUM SULPHATES AND HEMIHYDRATE AND A COMPOSITION USEFUL FOR THE PREPARATION OF SUCH LOAD. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB561205A (en) * | 1942-07-13 | 1944-05-10 | Francis Robert Himsworth | Improvements in or relating to the production of gypsum from anhydrite |
| FI814197L (en) * | 1981-01-02 | 1982-07-03 | Enriqueta Galceran Vila | FOER FARING FOR FRAMSTAELLNING AND CHARGING AV CRYSTAL PRODUCTS |
| FR2629069B1 (en) * | 1988-03-24 | 1990-11-23 | Lafarge Sa Platres | PROCESS FOR THE PREPARATION OF CALCIUM SULPHATE WITH A LONGLINE CRYSTALLINE STRUCTURE HAVING A LENGTH AND A FACTOR OF MASTERED SHAPE |
-
1990
- 1990-10-09 ES ES9002562A patent/ES2023766A6/en not_active Expired - Lifetime
- 1990-11-12 IT IT02201290A patent/IT1245725B/en active IP Right Grant
- 1990-11-12 FR FR909014009A patent/FR2667585B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2667585A1 (en) | 1992-04-10 |
| IT9022012A0 (en) | 1990-11-12 |
| IT1245725B (en) | 1994-10-14 |
| FR2667585B1 (en) | 1993-08-06 |
| IT9022012A1 (en) | 1992-05-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC1A | Transfer granted |
Owner name: COMPA\IA GENERAL YESERA, S.A. |
|
| PC1A | Transfer granted |