CS247036B1 - Preparation method of hydrolysate - Google Patents
Preparation method of hydrolysate Download PDFInfo
- Publication number
- CS247036B1 CS247036B1 CS854459A CS445985A CS247036B1 CS 247036 B1 CS247036 B1 CS 247036B1 CS 854459 A CS854459 A CS 854459A CS 445985 A CS445985 A CS 445985A CS 247036 B1 CS247036 B1 CS 247036B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- weight
- hydrolyzate
- waste
- solution
- chromium
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title claims description 10
- 239000000413 hydrolysate Substances 0.000 title 1
- 239000002699 waste material Substances 0.000 claims description 34
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 28
- 239000011651 chromium Substances 0.000 claims description 27
- 229910052804 chromium Inorganic materials 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 9
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L sodium sulphate Substances [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 235000011837 pasties Nutrition 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000001120 potassium sulphate Substances 0.000 claims description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 24
- 230000008020 evaporation Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001845 chromium compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000283707 Capra Species 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006052 feed supplement Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000004252 protein component Nutrition 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
(54) Sposob přípravy hydrolyzátu(54) Method of preparation of hydrolyzate
Riešenie sa týká spůsohu přípravy hydrolyzátu z pevného chromí tého odpadu, najma postružín, odrezkov koží po činění alebo manipulačného odpadu, zvlášť vhodného do krmných zmesi. Rieši problém komplexného spracovania pevného chromitého koželužského odpadu.The present invention relates to a method for preparing a hydrolyzate from solid chromium waste, in particular bedding, tanning skins or handling waste, particularly suitable for compound feed. It solves the problem of complex treatment of solid chromium tanning waste.
Podstata riešenia spočívá v tom, že pevný chromitý odpad sa hydrolyzuje roztokom obšahujúcim 500 až 1 500 % hmot. vody a až 12 % hmot. koncentrovanej kyseliny sírovej, vzťahované na hmotnosť odpadu, pri těplote varu vody po dobu 20 až 120 minút, ďalej sa neutralizuje a ochladí na teplotu 25 až 35 °C, vzniknutý hydroxid chromitý ša odfiltruje a pH roztoku hydrolyzátu sa upraví na hodnotu 5,5 až 7,5 a roztok sa vaří 5 až 15 minut, potom sa ochladí na teplotu 25 až 30 °C, vylúčený síran vápenatý sa odfiltruje a hydrolyzát sa zahuhstí odpařením vody do pastovítej konzistencíe o obsahu sušiny 40 až 80 % hmot., připadne sa vysuší pri teplote 120 až 140 °C.The essence of the solution is that the solid chromium waste is hydrolysed with a solution containing 500 to 1500% by weight. % water and up to 12 wt. of concentrated sulfuric acid, based on the weight of the waste, at a boiling point of water for 20 to 120 minutes, further neutralized and cooled to 25 to 35 ° C, the chromium hydroxide formed is filtered off and the pH of the hydrolyzate solution is adjusted to 5.5 to 7.5 and the solution is boiled for 5 to 15 minutes, then cooled to 25 to 30 ° C, the precipitated calcium sulphate is filtered off and the hydrolyzate is concentrated by evaporation of water to a pasty consistency with a dry matter content of 40 to 80% by weight, optionally dried at 120-140 ° C.
Vynález sa týká spósobu přípravy hydrolyzátu z pevného chromitého odpadu, najma postružín, odrezikov kozí po činění alebo manipulačného odpadu, zvlášť vhodného do krmných zmesi.The invention relates to a process for the preparation of a hydrolyzate from solid chromium waste, in particular linings, goat trimmings or handling waste, particularly suitable for compound feed.
Pri súčasných sposoboch spracovania chromitých pevných koželužských odpadov sa technologie zameriavajú na získanie a využitie proteinových koncentrátov. Využitie kolagénových odpadov na krmivá má obmedzenia vyplývajúce z ich vlastností. Odpady činěné sofami chrómu možno spracovať na krmné přísady za podmienok, že sa uskutoční odchrómovanie do takého stupňa, aby připravené krmivo nemálo viac ako 0,1 % hmot. chromitej zlúčeniny. Táto požiadavka sa rieši například tak, že produkt z odpadov sa zmieša s inými zložkami v krmivé v pomere 1: 50, čím sa dosiahne prípustnej hranice chrómu v zmesnom krmivé.In the current methods of treating chromium solid tanning wastes, the technologies focus on the recovery and utilization of protein concentrates. The use of collagen waste for feed has limitations due to its properties. The wastes made of chromium salts may be processed into feed additives provided that the chromium plating is effected to a degree such that the prepared feed does not have more than 0.1% by weight. chromium compound. This requirement is addressed, for example, by mixing the waste product with the other ingredients in the feed at a ratio of 1:50, thereby achieving a permissible chromium limit in the mixed feed.
Známy je sposob spracovania chromitého odpadu, podl'a ktorého sa tlakovou hydrolýzou chromočinených postružín pri teplote 120 QC a prídavkom vodného roztoku oxidu vápenatého po 4 hodinách získá hydrolyzát, ktorý obsahuje predovšetkým peptidy a je vhodný pre přípravu tenzidov.It is known to process the chromium waste, according to which the pressure hydrolysis of chrome-shavings at 120 Q C and addition of aqueous solution of calcium oxide 4 hours gave a hydrolyzate which comprises peptides, and particularly suitable for the preparation of the surfactants.
Ďalej sú známe sposoby, kde podl'a prvého sa chromitý odpad hydrolyzuje s roztokom oxidu vápenatého a oxidu horečnatého pri Tubovofnom množstve vody. Hydrolyzát je vhodný ako doplňkové krmivo.Further, methods are known in which the chromium waste is hydrolyzed with a solution of calcium oxide and magnesium oxide at a tubal volume of water. The hydrolyzate is suitable as supplementary feed.
Pódia druhého sposobu sa chromočinený odpad najskor opracuje 0,2 % hmot. roztokom hydroxidu sodného a potom po premytí vodou sa rozvára priamou parou s prídavkom vápenatého mlieka až d,o dosiahnutia 6 % hmot. sušiny v odtahu. Potom sa roztok hydrolyzátu opat rozvára s príidavkom alkálie.At the second stage, the chromed tin scrap is first treated with 0.2 wt. sodium hydroxide solution and then, after washing with water, is boiled by direct steam with the addition of calcium milk to d, reaching 6% by weight. solids in the exhaust. The hydrolyzate solution is then sealed with the addition of alkali.
Pódia ďalšieho sposobu sa chromočinené postružiny hydrolyzujú vodným roztokom amoniaku za zvýšenej teploty a tlaku.Under another method, chromium tinned blacks are hydrolyzed with aqueous ammonia solution at elevated temperature and pressure.
Nevýhodou uvedeného spósobu je 1'ahká tvorba komplexných zlúčenín. Je známy tiež sposob výroby doplňkového krmivá, pri ktorom sa štiepia chromočinené usňové odpady působením odpadných vod z lúženia a následovnou alkalickou hydrolýzou až na nižšie bielkovinové zložky.The disadvantage of this method is the easy formation of complex compounds. Also known is a process for the production of supplementary feed in which the chromed tanned leather waste is split by treatment with leaching waste water and subsequent alkaline hydrolysis to lower protein components.
Nevýhodou doterajších spósobov je nízký výťažok hydrolyzátu, vysoká energetická náročnost technologie spracovania odpadov i to, že doplňkové krmivo obsahuje vysoké zbytkové množstvo chromitej zlúčeniny.The disadvantages of the prior art are the low yield of hydrolyzate, the high energy consumption of the waste treatment technology and the fact that the feed supplement contains a high residual amount of chromium compound.
Uvedené nevýhody odstraňuje spňsob přípravy hydrolyzátu pódia vynálezu, ktorého podstata spočívá v tom, že pevný chromitý odpad sa hydrolyzuje roztokom obsahujúcim 500 až 1 500 % hmot. vody a 4 až 12 % hmot. koncentrovanej kyseliny sírovej, vztahované na hmotnost odpadu, pri teplote 100 °C po dobu 20 až 120 minút, ďalej sa neutralizuje a ochladí na teplotu 25 až 35 stupňov C, vzniknutý hydroxid chromitý sa odfiltruje a pH roztoku hydrolyzátu sa upraví na hodnotu 5,5 až 7,5 a roztok sa vari 5 až 15 minút, potom sa roztok ochladí na teplotu 25 až 30 °C, vylúčený síran vápenatý sa odfiltruje a hydrolyzát sa zahustí odpařením vody do pastovitej konzistencie o obsahu 40 až 80 % hmot. sušiny, připadne sa vysuší pri teplote 120 až 140 °C.The above-mentioned disadvantages are overcome by a process for the preparation of a hydrolyzate according to the invention, which is characterized in that the solid chromium waste is hydrolyzed with a solution containing from 500 to 1500% by weight. % water and 4 to 12 wt. of concentrated sulfuric acid, based on the weight of the waste, at 100 ° C for 20 to 120 minutes, further neutralized and cooled to 25 to 35 degrees C, the formed chromium hydroxide is filtered off and the pH of the hydrolyzate solution is adjusted to 5.5 The solution is cooled to 25-30 ° C, the precipitated calcium sulfate is filtered off and the hydrolyzate is concentrated by evaporation of the water to a pasty consistency of 40 to 80% by weight. optionally dried at 120 to 140 ° C.
Technický účinok vynálezu spočívá v tom, že sa dosahuje deštrukcia chromitého odpadu až na aminokyseliny. Vyzrážaný hydroxid chromitý sa může použiť na přípravu činiacej brečky. Technológia spósobu přípravy hydrolyzátu je energeticky nenáročná a množstvo chrómu vo vysušenom hydrolyzáte je meratefné v jednotkách ppm.The technical effect of the invention is that destruction of chromium waste up to amino acids is achieved. The precipitated chromium hydroxide can be used to prepare tanning liquor. The technology of the hydrolyzate preparation method is energy efficient and the amount of chromium in the dried hydrolyzate is measurable in ppm.
Hydrolyzát je zdravotně nezávadný a s výhodou sa aplikuje do krmných zmesi. Výťažok hydrolyzátu je v porovnaní s doteraz používanými spňsobmi vyšší o 20 až 60 % hmot.The hydrolyzate is harmless to health and is preferably applied to the compound feed. The yield of the hydrolyzate is 20 to 60 wt.% Higher than the methods used hitherto.
Výhodou spósobu přípravy hydrolyzátu je komplexně spracovanie pevného chromitého odpadu, v neposlednom radě aj so zameraním na ochranu životného prostredia.The advantage of the hydrolyzate preparation process is the complex treatment of solid chromium waste, not least with a focus on environmental protection.
Spósob přípravy hydrolyzátu bližšie ozrejmujú příklady praktického uskutočnenia. Jednotlivé množstvá sú uvádzané v percentách hmotnostných, vztahované na celkovú hmotnost pevného chromitého odpadu.The method of preparation of the hydrolyzate is illustrated in more detail by the following examples. Individual amounts are given in percent by weight, based on the total weight of solid chromium waste.
Příklad 1Example 1
Do reakčnej nádoby sa nadávkovali chromité postružiny a odřezky koží po činění, ktoré sa hydrolyzovali roztokom obsahujúcim 500 % hmot. vody a 4 % hmot. koncentrovanej kyseliny sírovej, vztahované na celkovú hmotnost pevného chromitého odpadu o obsahu 37 % hmot. sušiny. Zmes sa zahrlala na teplotu varu vody a hydrolyzovala po dobu 120 minút.The reaction vessel was charged with chromium-plated blacks and tanning shavings, which were hydrolyzed with a solution containing 500 wt. water and 4 wt. % concentrated sulfuric acid, based on the total weight of the solid chromium waste with a content of 37% by weight solids. The mixture was heated to boiling water and hydrolyzed for 120 minutes.
Ďalej sa roztok neutralizoval hydroxidom vápenatým, ktorý sa přidával po ekvivalentných dieloch v celkovom množstve 7 % hmot. Po vyzrážaní a usadení hydroxidu chromitého, pri súčasnom ochladení na teplotu 25 °C sa roztok hydrolyzátu přefiltroval a pH sa. upravilo na hodnotu 7,5 prídavkom 1 % hmot,, hydrogénsíranu sodného. Roztok sa varii 5 minút a potom ochladil na teplotu 25 °G. Vylúčený síran vápenatý sa odfiltroval a získal sa. hydrolyzát v množstve 50 % hmot., ktorý sa zahustil odpařením vody až ďo obsahu sušiny 40 % hmot. P r i k 1 a d 2Further, the solution was neutralized with calcium hydroxide, which was added in equal parts in a total amount of 7% by weight. After precipitation and settling of the chromium hydroxide, while cooling to 25 ° C, the hydrolyzate solution was filtered and the pH was adjusted. adjusted to 7.5 by the addition of 1 wt% sodium hydrogen sulphate. The solution was boiled for 5 minutes and then cooled to 25 ° C. The precipitated calcium sulfate was filtered off and recovered. 50% by weight of the hydrolyzate, which was concentrated by evaporation of water to a dry matter content of 40% by weight. Example 1 and d 2
Do reakčnej nádoby sa nadávkoval manipulačný odpad po činění a chromité postružiny, ktoré sa hydrolyzovali roztokom obsahujúcim 1 000 % hmot. vody a 7 % hmot. koncentrovanej kyseliny sírovej, vztahované na celkovú hmotnost pevného chromitého odpadu. Zmes sa zahriala na teplotu varu vody a hydrolyzovala 50 minút. Ďalej sa roztok neutralizoval hydroxidom vápenatým, ktorý sa přidával postupné po ekviI valentných dieloch v celkovom množstve 10,5 % hmot. Po vyzrážaní a usadení hydroxidu chromitého pri súčasnom ochladení na teplotu 30 °C sa roztok hydrolyzátu přefiltroval a pH sa upravilo na hodnotu 6,5 prídavkom 3 % hmot. hydrogénsíranu sodného. Roztok sa varii 10 minút a potom o· chladil na teplotu 30 °C. Vylúčený síran vápenatý sa odfiltroval a získal sa hydrolyzát v množstve 70 % 'hmot., ktorý sa zahustil odpařením vody až do obsahu sušiny 60 % hmot.The reaction vessel was charged with tanning handling waste and chromium blacks which were hydrolyzed with a solution containing 1000 wt. water and 7 wt. concentrated sulfuric acid, based on the total weight of solid chromium waste. The mixture was heated to boiling water and hydrolyzed for 50 minutes. Further, the solution was neutralized with calcium hydroxide, which was added gradually in equal parts in a total amount of 10.5% by weight. After precipitation and settling of the chromium hydroxide with cooling to 30 ° C, the hydrolyzate solution was filtered and the pH was adjusted to 6.5 by addition of 3% by weight. sodium hydrogen sulphate. The solution was boiled for 10 minutes and then cooled to 30 ° C. The precipitated calcium sulfate was filtered off and the hydrolyzate was obtained in an amount of 70% by weight, which was concentrated by evaporation of water up to a dry matter content of 60% by weight.
Příklad 3Example 3
Do reakčnej nádoby sa nadávkovali chromité postružiny, ktoré sa hydrolyzovali s roztokom obsahujúcim 1 500 % hmot. vody a 12 % hmot. koncentrovanej kyseliny sírovej, vztahované na celkovú hmotnost postružín o obsahu 88 % hmot. sušiny. Zmes sa zahriala na teplotu varu vody a hydrolyzovala po dobu 20 minút. Ďalej sa vzniknutý roztok neutralizoval hydroxidem vápenatým, ktorý sa přidával postupné po ekvivalentných dieloch v celkovom množstve 20 % hmot. Po vyzrážaní a usadení hydroxidu chromitého sa roztok hydrolyzátu ,ochladil na teplotu 35 °C přefiltroval a pH sa upravilo na hodnotu 5,5 prípravkom 6 % hmot. hydrogénsíranu draselného. Roztok sa varii 15 minút a potom ochladil na teplotu 35 °C. Vylúčený síran vápenatý sa odfiltroval a hydrolyzát sa úplné vysušil pri teplote 130 °C.The reaction vessel was charged with chromium pellets, which were hydrolyzed with a solution containing 1500 wt. water and 12 wt. % of concentrated sulfuric acid, based on the total weight of the bedding having a content of 88% by weight. solids. The mixture was heated to boiling water and hydrolyzed for 20 minutes. Next, the resulting solution was neutralized with calcium hydroxide, which was added successively in equivalent portions in a total amount of 20% by weight. After precipitation and settling of the chromium hydroxide, the hydrolyzate solution was cooled to 35 ° C filtered and the pH adjusted to 5.5 with 6 wt. potassium hydrogen sulphate. The solution was boiled for 15 minutes and then cooled to 35 ° C. The precipitated calcium sulfate was filtered off and the hydrolyzate was completely dried at 130 ° C.
Příklad 4Example 4
Postup podl'a příkladu 1, s tým rozdielom, že ako neutralizačná látka sa použil uhličitan sodný v množstve 9 % hmot. vztahované na celkovú hmotnost' pevného chromitého odpadu. Získal sa hydrolyzát v množstve 60 % hmot. o obsahu sušiny 50 % hmot.The process of Example 1, except that 9% by weight of sodium carbonate was used as neutralizing agent. based on the total weight of solid chromium waste. The hydrolyzate was obtained in an amount of 60% by weight. With a dry matter content of 50% by weight.
Příklad 5Example 5
Postup podta příkladu 1, s tým rozdielom, že ako neutralizačná látka sa použil oxid horečnatý v množstve 6 % hmot., vztahované na celkovú hmotnost pevného chromitého odpadu. Získal sa hydrolyzát v množstve 80 % hmot., ktorý sa úplné vysušil pri teplote 140 °C.The process of Example 1, except that 6% by weight of magnesium oxide, based on the total weight of solid chromium waste, was used as neutralizing agent. The hydrolyzate was obtained in an amount of 80% by weight, which was completely dried at 140 ° C.
Příklad 6Example 6
Postup podta příkladu 1, s tým rozdielom, že na neutralizáciu sa použilo 5 % hmot. hydroxidu vápenatého a 3 % hmot. uhličitanu sodného, vztahované na celkovú hmotnost pevného chromitého odpadu. Získal sa hydrolyzát v množstve 90 % hmot., ktorý sa úplné vysušil pri teplote 120 °C.The process of Example 1, except that 5 wt. % calcium hydroxide and 3 wt. sodium carbonate, based on the total weight of solid chromium waste. The hydrolyzate was obtained in an amount of 90% by weight, which was completely dried at 120 ° C.
Příklad 7Example 7
Postup ako v příklade 1, s tým rozdielom, že na úpravu pH roztoku hydrolyzátu sa namiesto hydrogénsíranu sodného použila koncentrovaná kyselina sírová v množstve 0,1 % hmot., vztahované na celkovú hmotnost pevného chromitého odpadu. Získal sa hydrolyzát v množstve 50 % hmot., ktorý sa zahustil odpařením vody až do obsahu sušiny 40 % hmot.Procedure as in Example 1, except that 0.1% by weight of concentrated sulfuric acid, based on the total weight of solid chromium waste, was used instead of sodium hydrogen sulphate to adjust the pH of the hydrolyzate solution. The hydrolyzate was obtained in an amount of 50% by weight, which was concentrated by evaporation of water up to a dry matter content of 40% by weight.
Příklad 8Example 8
Postup podta příkladu 1, s tým rozdielom, že na úpravu pH roztoku hydrolyzátu sa namiesto hydrogénsíranu sodného použije hydrogénsiričitan sodný v množstve 1 % hmot., vztahované na celkovú hmotnost pevného chromitého odpadu. Získal sa hydrolyzát v množstve 50 % hmot., ktorý sa zahustil odpařením vody až do obsahu sušiny 40 % hmot.The process of Example 1, except that sodium bisulfite in an amount of 1% by weight, based on the total weight of solid chromium waste, is used instead of sodium bisulfate to adjust the pH of the hydrolyzate solution. The hydrolyzate was obtained in an amount of 50% by weight, which was concentrated by evaporation of water up to a dry matter content of 40% by weight.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS854459A CS247036B1 (en) | 1985-06-19 | 1985-06-19 | Preparation method of hydrolysate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS854459A CS247036B1 (en) | 1985-06-19 | 1985-06-19 | Preparation method of hydrolysate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS247036B1 true CS247036B1 (en) | 1986-11-13 |
Family
ID=5387390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS854459A CS247036B1 (en) | 1985-06-19 | 1985-06-19 | Preparation method of hydrolysate |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS247036B1 (en) |
-
1985
- 1985-06-19 CS CS854459A patent/CS247036B1/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2005784A6 (en) | Process for the preparation of aqueous solutions of 2-hydroxy-4-methylthio-butyric acid. | |
| CN106432020A (en) | Separation and purification method of D,L-methionine | |
| CN103540635A (en) | Preparation process of fish scale collagen protein | |
| CN113855588A (en) | Method for preparing keratin solution by wool hydrolysis | |
| CN108658821A (en) | D, clean preparation method of L-Methionine and products thereof | |
| CN109678768B (en) | A kind of method utilizing methionine crystallization mother liquor to produce methionine metal chelate | |
| CN111635331B (en) | Method for preparing glycine chelate and trace element fertilizer/high-efficiency slow-release fertilizer by using glycine mother liquor | |
| CN109678769B (en) | Method for producing methionine metal chelate by comprehensively utilizing methionine crystallization mother liquor | |
| JP2018021003A (en) | Method for producing taurine | |
| US1974554A (en) | Process for the production of amino acids from substances containing keratin | |
| CS247036B1 (en) | Preparation method of hydrolysate | |
| CN109485589B (en) | Method for preparing zinc methionine chelate from methionine mother liquor containing potassium carbonate or potassium bicarbonate | |
| CN111171334A (en) | Method for preparing sodium humate from high-calcium magnesium ore source | |
| CN111747842A (en) | Novel method for resource utilization of sodium citrate mother liquor | |
| US4789686A (en) | Process for the preparation of an aqueous solution of the sodium salt of methionine | |
| CN113105352A (en) | Method for preparing food-grade and feed-grade zinc glycinate and implementation device thereof | |
| CN113087635A (en) | Comprehensive utilization method of glycine crystallization mother liquor by hydantoin method and implementation device thereof | |
| CN110040698B (en) | Method for treating titanium dioxide waste acid by using magnesium sulfate | |
| CN116924844B (en) | Method for preparing amino acid chelated calcium by using ammonia-alkali method alkali distillation ammonia wastewater | |
| CN105949097B (en) | A method of reducing impurity in the exhaust of methionine ion-exchange and methionine crystalline mother solution | |
| CN115196596B (en) | Recycling process of copper water in synthesis of methylsulfonylmethane | |
| CN109160894A (en) | Environment-friendly and clean production process of DL-2-amino-4-methylselenobutyric acid | |
| CN109053502A (en) | A method of taurine is extracted using marine product leftover bits and pieces | |
| WO2018227839A1 (en) | Environment-friendly production method for methionine | |
| KR960015880B1 (en) | Removing method of egg shell membrane |