PL39693B1 - - Google Patents
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- Publication number
- PL39693B1 PL39693B1 PL39693A PL3969356A PL39693B1 PL 39693 B1 PL39693 B1 PL 39693B1 PL 39693 A PL39693 A PL 39693A PL 3969356 A PL3969356 A PL 3969356A PL 39693 B1 PL39693 B1 PL 39693B1
- Authority
- PL
- Poland
- Prior art keywords
- raw material
- ammonium sulphate
- added
- sulfuric acid
- gelatine
- Prior art date
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- 239000002994 raw material Substances 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229920000159 gelatin Polymers 0.000 claims description 9
- 235000019322 gelatine Nutrition 0.000 claims description 9
- 239000001828 Gelatine Substances 0.000 claims description 7
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 6
- 239000001166 ammonium sulphate Substances 0.000 claims description 6
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 6
- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Description
Opublikowano dnia 8 kwietnia 1957 r. i O T E K A^ r ¦:¦¦ ;-'atep.t owego POLSKIEJ RZECZYPOSPOLITEJ LUDOWEJ OPIS PATENTOWY Nr 39693 Zaklady Miesne uj Bydgoszczy*) Bydgoszcz, Polska KI. 22 i, 7 C09/L,*/*0 Sposób zobojetniania surowca w procesie wytwarzania ielatyny fotograficznej Patent trwa od dnia 3 marca 1956 r.Do zobojetniania surowca w procesie wy¬ twarzania zelatyny fotograficznej do emulsji bro- mosrebrowych i wysokoczulych stosuje sie kwas siarkowy.Powstajacy jednak w tym procesie siarczan wapniowy, z uwagi na slaba rozpuszczalnosc w wodzie jest bardzo trudny do wyplukania z surowca. Zelatyna otrzymywana z takiego su¬ rowca bardzo czesto ma za duza zawartosc po¬ piolu. Nadmierne ilosci siarczanów w zelatynie wplywaja takze odczulajaco na emulsje.Trudnosci te usuwa sposób wedlug wynalazku polegajacy na tym, ze po procesie plukania su¬ rowca po wapnowaniu, przed zobojetnieniem do¬ daje sie do niego 10 — 15% roztworu siarczanu amonowego w ilosci odpowiadajacej 0,7 — 1,8% krystalicznego siarczanu amonowego w stosunku do ciezaru surowca w stanie mokrym. Amoniak wydzielajacy sie w wyniku reakcji siarczanu amonowego z zawartym w surowcu wodorotlen¬ kiem wapniowym powoduje rozpulchnienie ze- *) Wlasciciel patentu oswiadczyl, ze twórca wynalazku jest inz. Alfred Grosman. wnetrznych warstw surowca i ulatwia przenika¬ nie roztworu kwasu wglab surowca, có sprzyja latwiejszemu wyplukaniu siarczanu wapniowego powstajacego w trakcie zobojetniania.Dzieki zastosowaniu wynalazku mozna wytwa¬ rzac przy uzyciu do zobojetnienia kwasu siarko¬ wego, zelatyne fotograficzna o dobrej czulosci i o zawartosci popiolu ponizej l,5°/o.Przyklad. Oseine, tak jak przy normalnej produkcji zelatyny fotograficznej, plucze sie do¬ brze woda, wapnuje, plucze po wapnowaniu, a na¬ stepnie dodaje sie do niej 10% roztwór siarcza¬ nu amonowego w ilosci odpowiadajacej 1,2% siarczanu amonowego krystalicznego w stosunku do ciezaru oseiny w stanie mokrym i dobrze mie¬ sza. Po uplywie 1 1/2 godziny przeprowadza sie zobojetnienie przez dodanie 4%-owego kwasu siarkowego w ilosci 0,9% kwasu siarkowego w przeliczeniu na stezony kwas siarkowy w sto¬ sunku do ciezaru oseiny w stanie mokrym. Po zobojetnieniu oseine plucze sie az do negatyw¬ nej reakcji cieczy na SO4" z 10%-owym chlor¬ kiem barowym. Dalej postepuje sie tak jakw znanym sposobie otrzymywania zelatyny.Otrzymuje sie zelatyne fotograficzna przydatna do emulsji wysokoczulych. PLPublished on April 8, 1957 and O T E K A ^ r ¦: ¦¦; - 'atep.towe POLISH PEOPLE'S REPUBLIC PATENT DESCRIPTION No. 39693 Miesne Estates in Bydgoszcz *) Bydgoszcz, Poland KI. 22 i, 7 C09 / L, * / * 0 Method of neutralizing the raw material in the process of producing photographic gelatin The patent lasts from March 3, 1956 For the neutralization of the raw material in the process of producing photographic gelatine, sulfuric acid is used for silver broth and highly sensitive emulsions However, the calcium sulphate formed in this process, due to its low solubility in water, is very difficult to rinse out of the raw material. The gelatine obtained from such a raw material very often has a too high alcohol content. Excessive amounts of sulphates in gelatine also have a desensitizing effect on the emulsions. These difficulties are removed by the method according to the invention whereby after washing the raw material after liming, 10-15% ammonium sulphate solution in an amount corresponding to 0% is added to it before neutralization. , 7 - 1.8% of crystalline ammonium sulphate based on wet weight of the raw material. The ammonia that is released by the reaction of ammonium sulphate with the calcium hydroxide contained in the raw material causes the loosening of the material. *) The owner of the patent stated that the inventor was Eng. of the inner layers of the raw material and facilitates the penetration of the acid solution into the raw material, which facilitates the washing out of the calcium sulphate formed during the neutralization. Thanks to the application of the invention, it is possible to produce, using sulfuric acid to neutralize, photo gelatines with good sensitivity and ash content below , 5 ° / o. Example. Oseine, as in the normal production of photo gelatine, is rinsed well with water, limed, rinsed after liming, and then a 10% solution of ammonium sulphate is added to it in an amount corresponding to 1.2% of crystalline ammonium sulphate in proportion to to the weight of the ossein in a wet state and mixes well. After 1 1/2 hours, neutralization is carried out by adding 4% sulfuric acid in an amount of 0.9% sulfuric acid, based on the concentrated sulfuric acid, based on the wet weight of the salt. After neutralization, the oseine rinses until the liquid reacts negatively to SO4 "with 10% barium chloride. The next procedure is the same as in the known method of obtaining gelatine. Photographic gelatine is obtained, useful for highly sensitive emulsions. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL39693B1 true PL39693B1 (en) | 1956-06-15 |
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