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WO1980002422A1 - Procede d'obtention de solutions concentrees de formaldehyde - Google Patents

Procede d'obtention de solutions concentrees de formaldehyde Download PDF

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Publication number
WO1980002422A1
WO1980002422A1 PCT/SU1979/000069 SU7900069W WO8002422A1 WO 1980002422 A1 WO1980002422 A1 WO 1980002422A1 SU 7900069 W SU7900069 W SU 7900069W WO 8002422 A1 WO8002422 A1 WO 8002422A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
maldehyde
equal
fact
κοlοnny
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.)
Ceased
Application number
PCT/SU1979/000069
Other languages
English (en)
Russian (ru)
Inventor
Y Blashin
V Zakoshansky
L Vagina
G Timofeev
K Valuev
S Kazakova
A Devekki
G Idlis
O Soboleva
S Ogorodnikov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from SU792753851A external-priority patent/SU1425186A1/ru
Priority claimed from SU792753852A external-priority patent/SU1209679A1/ru
Application filed by Individual filed Critical Individual
Priority to DE19792953653 priority Critical patent/DE2953653A1/de
Publication of WO1980002422A1 publication Critical patent/WO1980002422A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation

Definitions

  • Formaldehyde in VVD 37-40 is widely used in industrial processes. At a number of processes, however, pressing large quantities of water in raw materials is undesirable. It is more effective for these processes to use a high-concentration liquid phosphorus maldehyde, which contains little or no water at all.
  • the concentration is reduced when a small amount of maldehyde is accumulated at a later stage in the burner, and the temperature is lower. After each increase in concentration, an aging of 0.5-30 minutes follows. , during this period, the temperature rises above the temperature of the “stability” temperature and is 5 ° C to prevent the onset of immunity. ⁇ em- ⁇ e ⁇ a ⁇ u ⁇ a Ha Yai ⁇ azhd ⁇ y s ⁇ u ⁇ eni ⁇ evyshae ⁇ ⁇ 00 ⁇ C.
  • the stability of the concentrated liquid product obtained in the kuboyan is important. It is well-known that aquatic products of maldehyde with a concentration of $ 70-80 and higher represent a general alloy, which is generally available at a cost of $ 10 or less. It is obvious that mixtures with a concentration of maldehyde more than 90-93 do not generally contain water in a chemically unrelated state. Hot melt alloys are highly unstable systems.
  • D ⁇ bavlenie ⁇ ganiches ⁇ g ⁇ ⁇ as ⁇ v ⁇ i ⁇ elya not ⁇ b ⁇ azu ⁇ - scheg ⁇ aze ⁇ nuyu mixture v ⁇ d ⁇ y and s ⁇ abizhzi ⁇ z ⁇ schey d ⁇ bav- ⁇ i ⁇ zv ⁇ lyae ⁇ snizi ⁇ ⁇ em ⁇ e ⁇ a ⁇ u ⁇ u in ⁇ e ⁇ i ⁇ i ⁇ ali ⁇ nn ⁇ y ⁇ - l ⁇ nne, thus ⁇ em uts ⁇ s ⁇ iv ⁇ e ⁇ n ⁇ l ⁇ giyu ⁇ lzgcheniya zhid ⁇ g ⁇ ⁇ ntsen ⁇ i ⁇ vann ⁇ g ⁇ ⁇ maldegida.
  • the method of concentrating on the production of maldehyde in conjunction with the present invention 10 is carried out as follows.
  • Distribution of pressure / temperature / at a higher level ensures the separation of diluted, non-concentrated products in the form of distillation and non-concentrate formaldehyde in a homogenous stable state.
  • the unit is at least 30-60 ° C, preferably 40-50 ° C.
  • the certification can also be used in the presence of
  • ⁇ ⁇ aches ⁇ ve ⁇ ganiches ⁇ g ⁇ ⁇ as ⁇ v ⁇ i ⁇ elya m ⁇ gu ⁇ is ⁇ l- z ⁇ va ⁇ sya vys ⁇ i ⁇ yaschie ⁇ b ⁇ chnye ⁇ du ⁇ y sin ⁇ eza iz ⁇ e- on, ⁇ lzgchaem ⁇ g ⁇ of iz ⁇ bu ⁇ ilena and ⁇ maldegida, na ⁇ ime ⁇ , 4,4-dshle ⁇ il- ⁇ , di ⁇ san-3, 4-me ⁇ il-4-vinyl- ⁇ , 3-di ⁇ san,
  • the residual pressure at the upper end is equal to 100 mm Hg, the pressure in the cube is 0.8 at.
  • the distillate, 187.8 kg / h, contains 11.9 kg kg of maldehyde / 6.3 $ / and 175.9 kg of water / 93.7 /. 131.8 kg / h of the concentrate withdrawn from the cube accounted for 91.7 kg of physical maldehyde / $ 69.6 /, 39.6 kg / g of food / 0.4 food $ 0.5 /.
  • the target product with an increase in the concentration of maldehyde without the release of 99.4 is homogenous and stable at temperatures above 60 ° C.
  • the upper part of the crate is equipped with standard carts, the lower part / below the food cart is supplied ⁇ - 9 - by deaf coffers and bypass steamers with pressure regulators.
  • the residual pressure in the upper part of the valve is 20 mm Hg, the differential pressure in the upper part of the Hose is 3 mm hg.
  • the pressure in ku-5 is constant equal to 2 ata, the pressure drop in the lower part is at a constant pressure of 1.96 ata.
  • the consumer product is 88 kg / h, with a concentration of ⁇ -maldehyde of $ 95.
  • the cubicle is manufactured / in accordance with 30 in accordance with the pressure in the cube / equal to 27 ° C and ensures a homogeneous and stable.
  • a stable liquid system for the 95 $ -good production and the temperature of the manifestation of a second phase is equal to • a constant of 26 ° ⁇ and ⁇ 2 ⁇ ° ⁇ /. 35.
  • Distribution of the temperature / pressure, at a height of more than one, ensures the homogeneity and stability of the solution in any section thereof.
  • the constant pressure of the upper part is set equal to 60 mm r.st.st. , the pressure in the cube is equal to 2.5 ata.
  • the equipped nozzle of the Sulzera type has a pressure drop of 15 mm r.p. ⁇ of the lower part of the casing, equipped with deaf coffers with the adjustable pair of LIHIIAH, the pressure drop is 2.4 aa.
  • the consumer product 117.7 kg / hr, contains $ 95 for maldehyde and provides a homogeneous product that does not contain a stable phase, which is stable for the consumer. /
  • the temperature in the cube tank is ⁇ 27 ° ⁇ , and the temperature of the stable liquid system is the same for the 95 $ -gas unit ⁇ 26 ° ⁇ /.
  • the distribution of the temperature / pressure / at a height of the chamber ensures the homogeneity of the solutions in any of its cross-sections.
  • the constant pressure of 130 mm Hg is installed on the casing of the casing, 0.8 bar in the casing of the casing.
  • the differential pressure drop is equal to 100 mm Hg, in the lower 0.5 atm.
  • the appliance in the cube is equal to 96 ° C and ensures the stability and homogeneity of the target product when processed, which is processed.
  • the middle part of the recycling section is introducing 320 kg / hour of the 40-year-old compound for the production of maldehyde. ⁇ cubic tanks introduce 3.7 kg / hour of methylbutanediol.
  • Metered pressure in front of the fans installs ⁇ . - II - equal to 100 mm ⁇ .st. , the pressure in the cube is equal to I ata.
  • the distillate 195.7 kg / h, contains 13.1 kg kg of maldehyde / $ 6.7 / and 182.6 kg of water / $ 93.3 /.
  • Dairy products 128 kg / h, costs 89.8 $ for food / 114.9 kg /, 3 methylbutanedi / 3.7 kg / and 7.2 $ for water / 9.4 kg /.
  • the constant pressure is equal to 100 mm of constant pressure.
  • the pressure in the kuboyan is equal to I ata. 188.2 kg / hour of distillate, which is 12.5 kg of formaldehyde / 6.7 $ / and 175.7 kg of water / 93.3 $ /, is withdrawn from the circle; it contains 107.5 kg of food; / 87.4 $ /, 12.2 kg of glycerin / $ 0 / and 4.3 kg of water / $ 3.6 /.
  • the target product with an increase in the concentration of formaldehyde without taking into account the consumer of $ 96.1 is homogeneous and stable when the temperature is higher than 99 ° C, if used, it is used.
  • the residual pressure at the top of the pipe is equal to 100 mm Hg, in the pipe the pressure is equal to 0.8 at.
  • the target product with a concentration of maldehyde without the release of the consumer 96.1 $ is homogenous and stable at a temperature of not lower than 94 ° C, if received, Example 8.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

Le procede consiste a appliquer le procede de rectification a pression reduite et a une pression differentielle minimum dans la section superieure de la colonne et a une plus grande pression dans l'alambic de la colonne. La pression differentielle dans la section superieure de la colonne est egale a 3-100 mm de mercure a une pression de 20-300 mm de mercure, tandis que la pression differentielle dans la section inferieure de la colonne est egale a 0,5-2,4 atm. a une pression de 0,8-2,5 atm. dans l'alambic de la colonne. Des solutions concentrees de formaldehyde obtenues avec cette methode peuvent etre utilisees comme materiaux bruts dans une synthese en phase liquide.
PCT/SU1979/000069 1979-05-04 1979-08-21 Procede d'obtention de solutions concentrees de formaldehyde Ceased WO1980002422A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792953653 DE2953653A1 (de) 1979-05-04 1979-08-21 Method of obtaining concentrated solutions of formaldehyde

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SU792753851A SU1425186A1 (ru) 1979-05-04 1979-05-04 Способ получени высококонцентрированных растворов формальдегида
SU2753851 1979-05-04
SU792753852A SU1209679A1 (ru) 1979-05-04 1979-05-04 Способ получени высококонцентрированных водных растворов формальдегида

Publications (1)

Publication Number Publication Date
WO1980002422A1 true WO1980002422A1 (fr) 1980-11-13

Family

ID=26665773

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SU1979/000069 Ceased WO1980002422A1 (fr) 1979-05-04 1979-08-21 Procede d'obtention de solutions concentrees de formaldehyde

Country Status (3)

Country Link
JP (1) JPS56500447A (fr)
GB (1) GB2066817A (fr)
WO (1) WO1980002422A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4454354A (en) * 1982-08-02 1984-06-12 Monsanto Company Manufacture of aqueous formaldehyde
DE19925870A1 (de) * 1999-06-07 2000-12-14 Basf Ag Verfahren zur Umsetzung einer ein Gemisch enthaltenden Lösung
USD1056217S1 (en) * 2022-12-12 2024-12-31 The Board Of Regents Of The University Of Texas System Body frame

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527655A (en) * 1948-06-03 1950-10-31 Du Pont Concentration of formaldehyde
US2527654A (en) * 1947-02-24 1950-10-31 Du Pont Formaldehyde concentration
DE1928633A1 (de) * 1969-06-06 1970-12-10 Basf Ag Verfahren zur Herstellung von wasserarmen Loesungen von Formaldehyd
JPS4924453A (fr) * 1972-06-29 1974-03-04

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527654A (en) * 1947-02-24 1950-10-31 Du Pont Formaldehyde concentration
US2527655A (en) * 1948-06-03 1950-10-31 Du Pont Concentration of formaldehyde
DE1928633A1 (de) * 1969-06-06 1970-12-10 Basf Ag Verfahren zur Herstellung von wasserarmen Loesungen von Formaldehyd
JPS4924453A (fr) * 1972-06-29 1974-03-04

Also Published As

Publication number Publication date
GB2066817A (en) 1981-07-15
JPS56500447A (fr) 1981-04-09

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