ES245221A1 - Método para obtener soluciones concentradas - Google Patents
Método para obtener soluciones concentradasInfo
- Publication number
- ES245221A1 ES245221A1 ES0245221A ES245221A ES245221A1 ES 245221 A1 ES245221 A1 ES 245221A1 ES 0245221 A ES0245221 A ES 0245221A ES 245221 A ES245221 A ES 245221A ES 245221 A1 ES245221 A1 ES 245221A1
- Authority
- ES
- Spain
- Prior art keywords
- formaldehyde
- urea
- solutions
- total
- absorption
- 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
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title abstract 33
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 10
- 239000004202 carbamide Substances 0.000 title abstract 10
- 238000000034 method Methods 0.000 title abstract 3
- 229920001807 Urea-formaldehyde Polymers 0.000 title 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 title 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 3
- 238000010521 absorption reaction Methods 0.000 abstract 3
- VGGLHLAESQEWCR-UHFFFAOYSA-N N-(hydroxymethyl)urea Chemical compound NC(=O)NCO VGGLHLAESQEWCR-UHFFFAOYSA-N 0.000 abstract 2
- 239000007859 condensation product Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000000178 monomer Substances 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 239000000047 product Substances 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
- C08G12/12—Ureas; Thioureas
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/025—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds of solutions of urea and formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/86—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1549957 | 1957-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES245221A1 true ES245221A1 (es) | 1959-05-01 |
Family
ID=11148056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0245221A Expired ES245221A1 (es) | 1957-10-30 | 1958-10-29 | Método para obtener soluciones concentradas |
Country Status (6)
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3151960A (en) * | 1962-06-08 | 1964-10-06 | Stamicarbon | Process for absorbing formaldehyde from a formaldehyde-containing gas |
| US3243939A (en) * | 1962-07-17 | 1966-04-05 | Stamicarbon | Process for absorbing formaldehyde from gases containing the same |
| NL298226A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1963-09-23 | |||
| US3862221A (en) * | 1967-08-02 | 1975-01-21 | Oreal | N,N{40 -di(hydroxymethylcarbamyl)cystamine |
| IT951964B (it) * | 1971-12-27 | 1973-07-10 | Sir Soc Italiana Resine Spa | Procedimento perfezionato per la preparazione di resine da urea e formaldeide |
| IT951962B (it) * | 1971-12-27 | 1973-07-10 | Sir Soc Italiana Resine Spa | Procedimento per la preparazione di resine da urea e formaldeide |
| US4065421A (en) * | 1976-03-17 | 1977-12-27 | Reichhold Chemicals, Inc. | Continuous process for the production of aqueous urea-formaldehyde solutions |
| AU666404B2 (en) * | 1992-08-07 | 1996-02-08 | Yara Sluiskil B.V. | Process for the production of urea granules |
| JP3667418B2 (ja) * | 1996-02-01 | 2005-07-06 | 東洋エンジニアリング株式会社 | 粒状尿素の製造方法 |
| GB2394956B (en) * | 2002-10-18 | 2004-10-27 | Basic Solutions Ltd | A urea based granule blend for ice-melting and reducing granule caking |
| NL1023303C2 (nl) * | 2003-04-29 | 2004-11-01 | Dsm Nv | Werkwijze voor de bereiding van een ureum- en formaldehydebevattende waterige oplossing. |
| NL1027314C2 (nl) * | 2004-10-22 | 2006-04-25 | Dsm Ip Assets Bv | Werkwijze voor de produktie van een melamine en aldehyde bevattende waterige stroom. |
| AT516530B1 (de) | 2014-11-20 | 2018-02-15 | Johnson Matthey Plc | Verfahren und Vorrichtung zur Herstellung einer wässrigen Lösung von Formaldehyd |
| CN113999358B (zh) * | 2021-11-23 | 2024-02-06 | 绵阳市建诚化工有限公司 | 一种甲醛生产刨花板用脲醛预缩液的制备方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1507624A (en) * | 1923-02-05 | 1924-09-09 | Pollak | Process for manufacturing condensation products |
| US1987601A (en) * | 1932-05-26 | 1935-01-15 | Du Pont | Purification of alcohols |
| US2321544A (en) * | 1940-05-22 | 1943-06-08 | Du Pont | Preparation of methylol urea |
| DE835300C (de) * | 1942-01-24 | 1952-03-31 | Glanzstoff Ag | Verfahren zur Herstellung stabiler, auch nach kurzem Aufkochen noch bestaendiger, mineralsaurer Loesungen aus Formaldehyd und Harnstoff |
| GB641703A (en) * | 1947-03-06 | 1950-08-16 | Du Pont | Manufacture of unpolymerized urea-formaldehyde reaction products |
| US2467212A (en) * | 1947-03-06 | 1949-04-12 | Du Pont | Liquid urea-formaldehyde compositions |
| US2946403A (en) * | 1958-08-13 | 1960-07-26 | Borden Co | Concentrated formaldehyde solution |
-
1958
- 1958-10-27 GB GB34274/58A patent/GB906120A/en not_active Expired
- 1958-10-27 CH CH6544958A patent/CH398530A/de unknown
- 1958-10-27 US US769920A patent/US3067177A/en not_active Expired - Lifetime
- 1958-10-28 DE DE1958M0039422 patent/DE1239290C2/de not_active Expired
- 1958-10-29 ES ES0245221A patent/ES245221A1/es not_active Expired
-
1967
- 1967-02-27 NL NL6703094A patent/NL6703094A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1239290C2 (de) | 1976-07-01 |
| CH398530A (de) | 1966-03-15 |
| GB906120A (en) | 1962-09-19 |
| US3067177A (en) | 1962-12-04 |
| DE1239290B (de) | 1967-04-27 |
| NL6703094A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1967-05-25 |
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