PL4833B3 - A method of making metaidehydrate resistant to higher temperatures. - Google Patents
A method of making metaidehydrate resistant to higher temperatures. Download PDFInfo
- Publication number
- PL4833B3 PL4833B3 PL4833A PL483322A PL4833B3 PL 4833 B3 PL4833 B3 PL 4833B3 PL 4833 A PL4833 A PL 4833A PL 483322 A PL483322 A PL 483322A PL 4833 B3 PL4833 B3 PL 4833B3
- Authority
- PL
- Poland
- Prior art keywords
- higher temperatures
- metaidehydrate
- resistant
- making
- metaldehyde
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 14
- 229910021529 ammonia Inorganic materials 0.000 claims description 7
- 239000005956 Metaldehyde Substances 0.000 claims description 6
- GKKDCARASOJPNG-UHFFFAOYSA-N metaldehyde Chemical compound CC1OC(C)OC(C)OC(C)O1 GKKDCARASOJPNG-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- 239000001099 ammonium carbonate Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000010790 dilution Methods 0.000 claims 1
- 239000012895 dilution Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Description
Najdluzszy czas trwania patentu do dnia 4 czerwca 1940 r.Wedlug patentu Nr 2 177 mozna uczy¬ nic metaldehyd bardziej odpornym ma dzia¬ lanie wyzszych temperatur przez to, ze u- suwa sie resztki katalizatora, który sluzyl do wytworzenia metaidehydu albo przez to, ze katalizatorowi odbiera sie moznosc dzia¬ lania, np. w ten sposób, ze przeprowadza go sie chemicznie albo fizycznie w nieczyn¬ na forme.Obecnie znaleziono, ze do tego celu szczególnie nadaje sie amonjak i ze przez stosowanie amonjaku jako srodka stabili¬ zacyjnego osiaga sie jeszcze i te korzysc, ze przez dozowanie amonjaku otrzymac mozna rozmaite stopnie stabilizacji cial palnych.Ustalono, mianowicie, ze czysty metal¬ dehyd nadaje sie wprawdzie do wiekszo-.sci celów, do których sie go uzywa, lepiej, niz mniej czysty, juz z powodu wiekszej wy¬ trzymalosci na wyzsze tempera'ary powy¬ zej 30°C, ale stosowany do pewnych celów mniej czysty metaldehyd ma równiez swo¬ je zalety, a mianowicie — latwiejsza za¬ palnosc i zywszy plomien, a to z nastepu¬ jacych powodów: najbardziej czysty metal¬ dehyd przy gaszeniu pokrywa sie lekka po¬ wloka skladajaca sie z krysztalów metai¬ dehydu, która moze wywierac szkodliwy wplyw na czule pcd wzgledem mechanicz¬ nym palniki, np., w przyrzadach kieszenio¬ wych, w których metaldehyd zostaje od-powiednio do spalania automatycznie posu¬ wany dla osiagniecia równomiernego plo¬ mienia.Nalezy zauwazyc, ze ilosci zanieczy¬ szczen sa w tym wypadku bardzo male i leza w granicach analitycznej wykrywalno¬ sci. Dozowanie zanieczyszczen, np,, przez dodatki jest trudne.Znaleziono, ze dozowanie zapomoca a- monjaku, jak równiez przez lotne sole a- monjakalne, a przedewszystkiem weglan a- monowy jest mozliwe, gdy przy stabilizacji metaldehydu przez amonjak przeprowadza sie go przez powietrze, które amonjak albo amonjak i kwas weglowy zawiera w ilo¬ sciach, okreslanych przez doswiadczenie.Równiez i czas trwania dzialania amonjaku, szybkosc przeprowadzania reakcji i tempe¬ ratura, przy której proces sie odbywa, sa rzecza praktyki.We-glan amonowy miesza sie z pro¬ szkiem metaldehydowym przed sprasowa¬ niem w ilosciach, odpowiednich do pozada¬ nego stopnia stabilizacji. Dziejki lotnosci tej soli jest zwykle przy tak malych dodat- , kach niebezpieczenstwo otrzymania nie¬ równomiernej mieszaniny zupelnie usu¬ niete. PLThe longest term of the patent until June 4, 1940. According to Patent No. 2,177, it is possible to make metaldehyde more resistant to higher temperatures by removing the remains of the catalyst which was used to produce metaidehydrate or by the fact that the catalyst is deprived of its ability to act, for example by carrying it chemically or physically in an inactive form. It has now been found that ammonia is particularly suitable for this purpose and that by using ammonia as a stabilizing agent it is achieved Another advantage is that by dosing ammonia, various degrees of stabilization of flammable bodies can be obtained. It has been established that, although pure metal dehydrate is suitable for most of the purposes for which it is used, it is better than less pure. because of its greater resistance to higher temperatures above 30 ° C, but the less pure metaldehyde used for some purposes also has its advantages, namely easier flammability and improved flame retardancy. This is because of the following reasons: the purest metal dehydrate is covered with a light coating consisting of crystals of meta-dehydrate, which can have a detrimental effect on the mechanical sensitivity of burners, e.g. in electric devices. Pocket pockets, in which the metaldehyde is automatically adjusted for combustion in order to obtain an even flame. It should be noted that the amounts of contamination in this case are very small and are within the limits of the analytical detectability. Dosing of contaminants, e.g. by additives, is difficult. It has been found that dosing by a-mono as well as by volatile a-mono-salts, and above all, a-mono carbonate is possible when stabilizing the metaldehyde by ammonium as it is carried out through the air, which ammonia or ammonia and carbonic acid contain in amounts determined by experience. The duration of the action of the ammonia, the speed of the reaction and the temperature at which the process takes place are a matter of practice. The ammonium carbonate is mixed with the propellant. With a metaldehyde solution prior to compression in amounts appropriate to the desired degree of stabilization. Due to the volatility of this salt, the danger of obtaining an uneven mixture is usually completely eliminated with such small additives. PL
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL4833B3 true PL4833B3 (en) | 1926-06-30 |
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