LT4250B - Method for purification of waste gas from phenol and formaldehyde - Google Patents
Method for purification of waste gas from phenol and formaldehyde Download PDFInfo
- Publication number
- LT4250B LT4250B LT96-024A LT96024A LT4250B LT 4250 B LT4250 B LT 4250B LT 96024 A LT96024 A LT 96024A LT 4250 B LT4250 B LT 4250B
- Authority
- LT
- Lithuania
- Prior art keywords
- formaldehyde
- phenol
- urea
- hydrogen peroxide
- mineral wool
- Prior art date
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 55
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 10
- 238000000746 purification Methods 0.000 title description 3
- 239000002912 waste gas Substances 0.000 title description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 14
- 239000011490 mineral wool Substances 0.000 claims abstract description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 150000002505 iron Chemical class 0.000 claims description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 abstract 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 abstract 1
- 229960002089 ferrous chloride Drugs 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910021577 Iron(II) chloride Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- CZZVSJPFJBUBDK-UHFFFAOYSA-N diazonio-(4-nitrophenyl)azanide Chemical compound [O-][N+](=O)C1=CC=C([N-][N+]#N)C=C1 CZZVSJPFJBUBDK-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- KHUXNRRPPZOJPT-UHFFFAOYSA-N phenoxy radical Chemical compound O=C1C=C[CH]C=C1 KHUXNRRPPZOJPT-UHFFFAOYSA-N 0.000 description 1
- JOVOSQBPPZZESK-UHFFFAOYSA-N phenylhydrazine hydrochloride Chemical compound Cl.NNC1=CC=CC=C1 JOVOSQBPPZZESK-UHFFFAOYSA-N 0.000 description 1
- 229940038531 phenylhydrazine hydrochloride Drugs 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
Išradimas priklauso statybinių medžiagų pramonei, naudojamas gaminant mineralinės vatos gaminius.The invention relates to the building materials industry used in the manufacture of mineral wool products.
Iš SU autorinio liudijimo Nr. 867 404 išradimo aprašymo žinomas išmetamijjų dujų valymo būdas nuo formaldehido sorbcijos metodu. Pro kolonėlę, pripildytą sausų medžiagų karbamido ir amofoso santykiu 1:1, iš pradžių praleidžiami vandens garai, o po to formaldehidas reaguoja su užpildytomis medžiagomis.Sio valymo būdo trūkumas tas, kad galima išvalyti dujas tik nuo formaldehido.From SU copyright no. 867 404 of the invention discloses a known method for purifying the exhaust gas from formaldehyde by sorption. A column filled with a 1: 1 ratio of urea to amophos in dry solids first passes water vapor and then reacts with formaldehyde with the fillers.
Japonijos patento Nr. 51-44898 aprašyme pateiktas išmetamųjų dujų valymo būdas nuo technologinių dujų fenolio ir formaldehido praplovimo metodu. Per indą, pripildytą vandenilio peroksido su dvivalentės geležies druska, kur Fe++ jonų koncentracija sudaro 1/7 peroksido koncentracijos, praleidžiamos fenolio ir formaldehido dujos. Šiame pripildytame skysčio inde ir vyksta reakcija.Šio valymo būdo trūkumas tas, kad susidaro didelis kiekis panaudotų vandeninių tirpalų.Japanese patent no. 51-44898 discloses a method for purifying waste gas from process gas by a phenol and formaldehyde purge method. Phenol and formaldehyde gas are passed through a vessel filled with hydrogen peroxide with a divalent iron salt where the Fe ++ ion concentration is 1/7 peroxide. The reaction is complete in this filled liquid container. The disadvantage of this method of purification is the large amount of aqueous solutions used.
Išradimo uždavinys - supaprastinti valymo procesą, išvengiant nutekamų vandenų susidarymo.The object of the invention is to simplify the purification process by avoiding the formation of wastewater.
vv
Sį uždavinį išsprendžia išmetamijjų dujų nuo fenolio ir formaldehido valymo būdas, praleidžiant jas pro mineralinės vatos plokštes, supurkštas 20-5Og 3%-niu vandenilio peroksidu su 3% FeCl2 4H2O priedu bei 20%-niu karbamido su amofosu (1:1) vandeniniu tirpalu.This problem is solved by a method of purifying the exhaust gases from phenol and formaldehyde by passing them through mineral wool slabs sprayed with 20-5Og of 3% hydrogen peroxide with 3% FeCl 2 4H 2 O and 20% urea with amophos (1: 1). ) in aqueous solution.
Pasiekiami pranašumai pasireiškia tuo, kad mineralinės vatos plokštės tarnauja kaip indas palaikyti skysčiui, kuriame ant mineralinės vatos plaušo vyksta skysčio reakcija su fenoliu ir formaldehidu.Geležies silikatas, kurio yra plauše, tarnauja kaip katalizatorius. Skysčiu naudojamas vandenilio peroksidas su 3% FeQ2 4H2O priedu ir 20%-nis karbamido su amofosu vandeninis tirpalas.Advantages achieved are that mineral wool panels serve as a vessel for maintaining a fluid in which the mineral wool fiber undergoes a reaction of the liquid with phenol and formaldehyde. The iron silicate in the fiber serves as a catalyst. The liquid used is hydrogen peroxide with 3% FeQ 2 4H 2 O and 20% aqueous solution of urea with amofos.
Vandenilio peroksidas fenolį oksidina iki fenoksūinio radikalo, kuriems susijungus susidaro stabilus produktas. Formaldehidui reaguojant su karbamidu ir amofosu taip pat susidaro stabilus produktas - heksametilentetraminas.Hydrogen peroxide oxidizes phenol to a phenoxy radical which, when combined, produces a stable product. Formaldehyde also reacts with urea and amofos to form a stable product, hexamethylenetetramine.
Naudotų medžiagų charakteristika:Characteristics of materials used:
Fenolis GOST6417-72, formalinas GOST 1625-89, karbamidas GOST 2081-92, vandenilio peroksidas GOST 10929-76, amofosas GOST 3772-74.Phenol GOST6417-72, formalin GOST 1625-89, urea GOST 2081-92, hydrogen peroxide GOST 10929-76, amophos GOST 3772-74.
Formaldehido kiekį nustatinėjome fotokolorimetriniu metodu, naudodami fenilhidrazino hidrochloridą. Fenolio kiekį nustatinėjome taip pat fotokolorimetriniu metodu, naudodami diazoparanitroaniliną.Formaldehyde content was determined by photochromimetry using phenylhydrazine hydrochloride. Phenol content was also determined by photochromimetry using diazoparanitroaniline.
Pralaidumo koeficientą matavome spektrometru Gb-46.The transmittance was measured with a Gb-46 spectrometer.
Pavyzdys Nr.l. Tyrimams naudojamas eksikatorinis metodas. Jo esmė: fenolis ir formalinas supilamas po mineralinės vatos plokšte, supurkšta surišančia dujas medžiaga, eksikatoriuje, kuris sandariai uždaromas ir po tam tikro laiko per absorberius siurbiamas oras 30min. ll/min. greičiu. Žiūrima, kiek dujų praeina pro mineralinės vatos plokštes. Skaičiavimuose naudojamas prisotinimo koeficientas 3.4 m /m (santykis pavyzdžio ploto su eksikatoriaus tūriu).Example No. 1 For research, the desiccator method is used. Its essence: phenol and formalin are poured under a plate of mineral wool, sprayed with a binder gas, in a desiccator, which is sealed and after some time the air is absorbed through the absorbers for 30 minutes. II / min. speed. It is observed how much gas passes through mineral wool slabs. A saturation factor of 3.4 m / m (ratio of sample area to desiccator volume) is used in the calculations.
Kiti pavyzdžiai analogiški pirmam pavyzdžiui. Rezultatai 1 lentelėje.Other examples are analogous to the first example. Results in Table 1.
lentelėtable
Kaip matyti 1 lentelėje, įpurškimas 20 - 50 g 3% vandenilio peroksido suAs shown in Table 1, injection of 20-50 g of 3% hydrogen peroxide with
3%FeCl2 4H2O ir 20%-nio karbamido su amofosu vandeninio tirpalo žymiai sumažina fenolio kiekį ir visai suriša formaldehido dujas.An aqueous solution of 3% FeCl2 4H2O and 20% aqueous urea with amofos significantly reduces phenolic content and completely binds formaldehyde gas.
Tačiau fenolio ir formaldehido surišimas priklauso nuo absorbuojančių medžiagų kiekio ( žiūr. 1 lentelę ). Įpurškus lOg lieka nesurišto formaldehido, o įpurškus ne mažiau 20g absorbuojančių medžiagų, formaldehidas visai surišamas. Kaip matyti 1 lentelėje, kuo daugiau įpurškiama absorbuojančių medžiagų, tuo greitesnis surišimas. Maksimaliu kiekiu laikom 50g, nes padidinti absorbuojančių medžiagų kiekį neekonomiška.However, the binding of phenol and formaldehyde depends on the amount of absorbent material (see Table 1). Injection of 10g leaves unbound formaldehyde, and injection of at least 20g of absorbent material binds the formaldehyde completely. As shown in Table 1, the more absorbent materials are injected, the faster the binding. The maximum amount is 50g because it is uneconomic to increase the amount of absorbents.
Pramoniniam išbandymui buvo padarytas maketas, kuris sudarytas iš metalinio karkaso su įstatyta į jį mineralinės vatos plokšte, supurkšta 3% FeQ2-4H2O priedu ir 20%-niu karbamido su amofosu vandeniniu tirpalu. Išpurškimui sunaudota 0.51/m .Pavyzdžiuose mineralinės vatos plokščių prisotinimo gylis po apipurškimo siekė 20mm. Dujos, turinčios formaldehido ir fenolio (1.5 ir 1.6 mg/m3 atatinkamai), buvo praleistos per filtrą 300 mg/val greičiu. Praėjusiose dujose fenolio ir formaldehido nerasta.For industrial testing, a model was made of a metal frame with a mineral wool slab embedded in it, sprayed with 3% FeQ2-4H2O additive and 20% aqueous urea with amofos. 0.51 / m was used for spraying. In the examples, the depth of saturation of mineral wool boards after spraying was 20mm. Gases containing formaldehyde and phenol (1.5 and 1.6 mg / m 3 , respectively) were passed through the filter at a rate of 300 mg / h. No phenol and formaldehyde were found in the passing gas.
Naudojant šį valymo būdą, išvengiama nutekamųjų vandenų susidarymo, kas supaprastina jo panaudojimą. Mineralinės vatos plokštes galima naudoti daug kartų užpurškiant vis naujas surišančių medžiagų porcijas. Tokiu būdu atpinga pats valymo būdas.This method of treatment prevents the formation of wastewater, which simplifies its use. Mineral wool boards can be used multiple times by spraying new portions of binders. In this way, the very way of cleaning is lost.
IŠRADIMO APIBRĖŽTISDEFINITION OF INVENTION
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LT96-024A LT4250B (en) | 1996-03-05 | 1996-03-05 | Method for purification of waste gas from phenol and formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LT96-024A LT4250B (en) | 1996-03-05 | 1996-03-05 | Method for purification of waste gas from phenol and formaldehyde |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LT96024A LT96024A (en) | 1997-09-25 |
| LT4250B true LT4250B (en) | 1997-11-25 |
Family
ID=19721717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LT96-024A LT4250B (en) | 1996-03-05 | 1996-03-05 | Method for purification of waste gas from phenol and formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| LT (1) | LT4250B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144898A (en) | 1974-10-15 | 1976-04-16 | Hochiki Co | JIDOKEI HOSOCHI |
| SU867404A1 (en) | 1977-08-31 | 1981-09-30 | Предприятие П/Я А-1676 | Method of cleaning waste gases from formaldehyde |
-
1996
- 1996-03-05 LT LT96-024A patent/LT4250B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144898A (en) | 1974-10-15 | 1976-04-16 | Hochiki Co | JIDOKEI HOSOCHI |
| SU867404A1 (en) | 1977-08-31 | 1981-09-30 | Предприятие П/Я А-1676 | Method of cleaning waste gases from formaldehyde |
Also Published As
| Publication number | Publication date |
|---|---|
| LT96024A (en) | 1997-09-25 |
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| MM9A | Lapsed patents |
Effective date: 19990305 |