WO1980002422A1 - Method of obtaining concentrated solutions of formaldehyde - Google Patents

Method of obtaining concentrated solutions of formaldehyde Download PDF

Info

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
Application number
PCT/SU1979/000069
Other languages
English (en)
French (fr)
Russian (ru)
Inventor
Y Blashin
V Zakoshansky
L Vagina
G Timofeev
K Valuev
S Kazakova
A Devekki
G Idlis
O Soboleva
S Ogorodnikov
Original Assignee
Y Blashin
V Zakoshansky
L Vagina
G Timofeev
K Valuev
S Kazakova
A Devekki
G Idlis
O Soboleva
S Ogorodnikov
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 Y Blashin, V Zakoshansky, L Vagina, G Timofeev, K Valuev, S Kazakova, A Devekki, G Idlis, O Soboleva, S Ogorodnikov filed Critical Y Blashin
Priority to DE19792953653 priority Critical patent/DE2953653A1/de
Publication of WO1980002422A1 publication Critical patent/WO1980002422A1/ru

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)
PCT/SU1979/000069 1979-05-04 1979-08-21 Method of obtaining concentrated solutions of formaldehyde WO1980002422A1 (en)

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
SU792753852A SU1209679A1 (ru) 1979-05-04 1979-05-04 Способ получени высококонцентрированных водных растворов формальдегида
SU2753851 1979-05-04

Publications (1)

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

Family

ID=26665773

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SU1979/000069 WO1980002422A1 (en) 1979-05-04 1979-08-21 Method of obtaining concentrated solutions of formaldehyde

Country Status (3)

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

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
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 (enrdf_load_stackoverflow) * 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 (enrdf_load_stackoverflow) * 1972-06-29 1974-03-04

Also Published As

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

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