CS238467B1 - A method of precipitating sulfate ions from wastewater by adding wastewater from the production of aluminumbenzene-containing ethylbenzene, at a dose corresponding to 0.045-0.36g Al 2+ + 2g per g with concomitant addition of dissolved salt in a dose of 0.2g to 1g. 66 g 2 + 2 - Ca per 1 g 30. The method is suitable for treatment of industrial waters, wastewater and mine water treatment, water finishing in water supply. - Google Patents
A method of precipitating sulfate ions from wastewater by adding wastewater from the production of aluminumbenzene-containing ethylbenzene, at a dose corresponding to 0.045-0.36g Al 2+ + 2g per g with concomitant addition of dissolved salt in a dose of 0.2g to 1g. 66 g 2 + 2 - Ca per 1 g 30. The method is suitable for treatment of industrial waters, wastewater and mine water treatment, water finishing in water supply. Download PDFInfo
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- CS238467B1 CS238467B1 CS646183A CS646183A CS238467B1 CS 238467 B1 CS238467 B1 CS 238467B1 CS 646183 A CS646183 A CS 646183A CS 646183 A CS646183 A CS 646183A CS 238467 B1 CS238467 B1 CS 238467B1
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Abstract
Předmětem vynálezu je příprava sodné soli (E)-3-(hydroxymethylen)-dihydro- -2(3H)-furanonu. Sodná sůl (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu se podle vynálezu připravuje tak, že se sodná sůl 3-(hydroxymethylen)dihydro-2(3H)-furanonu, rozpustí ve vodě nebo dimethylsulfoxidu nebo dimethylformamidu a rozpouštědlo se odstraní odpařením nebo zeotropní destilaci.The subject of the invention is the preparation of the sodium salt of (E)-3-(hydroxymethylene)-dihydro-2(3H)-furanone. The sodium salt of (E)-3-(hydroxymethylene)dihydro-2(3H)-furanone is prepared according to the invention by dissolving the sodium salt of 3-(hydroxymethylene)dihydro-2(3H)-furanone in water or dimethyl sulfoxide or dimethylformamide and removing the solvent by evaporation or zeotropic distillation.
Description
Předmět vynálezu se týkX^pr/pravy sodné soli (E)-3 -(hydroxymethylen)dihydro-2(3H)-furanonu.The present invention relates to the preparation of (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt.
Sodná sůl 3-(hydroxymethylen)dihydro-2(3H)-furanonu,připravená poprvé Korteni a Machleidtem (Ber.Deut.Chem.Ges.88, 1684 (1955)), je reaktivní nukleofilní činidlo, jehož četné reakce jsou popsány v literatuře. Vzhledem k nevyjasněné konfiguraci této soli vznikají při jejich reakcích obvykle směsi (E) a (Z)-isomerů,kde poměr isomerů ve směsi není dobře reprodukovatelný.3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium, first prepared by Korteni and Machleidt (Ber.Deut.Chem.Ges.88, 1684 (1955)), is a reactive nucleophilic reagent whose numerous reactions are described in the literature . Due to the unclear configuration of this salt, their reactions usually result in mixtures of (E) and (Z) -isomers where the ratio of isomers in the mixture is not well reproducible.
Nyní bylo zjištěno (Jonas J.: Coll.Czech. Chem. Coramun.- v tisku), že sodná sůl 3-{hydroxymethylen)dihydro-2(3H)-furanonu existuje v roztocích pouze ve formě (E)-isomeru a tuto formu lze z roztoků kvantitativně vyisolovat. Sodná sůl (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu byla charakterisovány C NMR spektry v pevné fázi a IR spektry v nujolu.It has now been found (Jonas J .: Coll.Czech. Chem. Coramun.- in press) that 3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium exists in solutions only in the form of the (E) -isomer and this the form can be quantitatively isolated from the solutions. The (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt was characterized by solid state C NMR and nujol IR spectra.
-2238 467-2238 467
Podle vynálezu byla nalezena příprava čisté sodné soli (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu vzorce I,According to the invention, the preparation of pure (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt of formula I has been found,
ON aON a
I která umožňuje použít k nukleofilním reakcím konfiguračně čistou sloučeninu I a dovoluje připravit čisté deriváty (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu, na př, sulfonáty neb?» karboxyláty. Sloučeninu vzorce I lze připravit rozpuštěním sodné soli 3-(hydroxymethylen)dihydro-2(3H)-furanonu na př. ve vodě nebo v dimethylsulfoxidu nebo v dimethyKormamidu a odstraněním rozpouštědla oddestilováním nebo azeotropním oddestilováním.I which allows the use of a configurationally pure compound I for nucleophilic reactions and allows the preparation of pure (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone derivatives, for example sulfonates or carboxylates. The compound of formula (I) may be prepared by dissolving 3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt, for example, in water or dimethylsulfoxide or dimethylformamide and removing the solvent by distillation or azeotropic distillation.
PříkladExample
Sodná sůl 3-(hydroxymethylen)dihydro-2 (3H)-furanonu byla rozpuštěna ve vodě nebo ▼ dimethylsulfoxidu nebo v dimethylformaraidu. Vzniklý roztok sodné soli (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu lze přímo použít k reakcím nebo sloučeninu vzorce I vyisolovat v pevném stavu odpařením rozpouštědla za atmosferického nebo sníženého tlaku nebo azeotropní destilací. Sodná sůl (E)-3-(hydroxymethylen)dihydro-2(3H)-furanonu vykazuje signály C při NUň v pevném stavu při 180.9, 175^7, 92,2, 25,1 a 64,8 ppm vzhledem k tetramethylsilanu jako vnitřnímu standardu.The sodium salt of 3- (hydroxymethylene) dihydro-2 (3H) -furanone was dissolved in water or dimethylsulfoxide or dimethylformaraid. The resulting (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt solution can be directly used for the reactions or the compound of formula I can be isolated in the solid state by evaporation of the solvent under atmospheric or reduced pressure or by azeotropic distillation. The (E) -3- (hydroxymethylene) dihydro-2 (3H) -furanone sodium salt shows solid state C signals at 180.9, 175-7, 92.2, 25.1 and 64.8 ppm relative to tetramethylsilane as internal standard.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS646183A CS238467B1 (en) | 1983-09-05 | 1983-09-05 | A method of precipitating sulfate ions from wastewater by adding wastewater from the production of aluminumbenzene-containing ethylbenzene, at a dose corresponding to 0.045-0.36g Al 2+ + 2g per g with concomitant addition of dissolved salt in a dose of 0.2g to 1g. 66 g 2 + 2 - Ca per 1 g 30. The method is suitable for treatment of industrial waters, wastewater and mine water treatment, water finishing in water supply. |
| CS842562A CS253313B1 (en) | 1983-09-05 | 1984-04-03 | Process for preparing (Z) -3- (hydroxymethylene) -dihydro-2 (3H) -furanone sodium salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS646183A CS238467B1 (en) | 1983-09-05 | 1983-09-05 | A method of precipitating sulfate ions from wastewater by adding wastewater from the production of aluminumbenzene-containing ethylbenzene, at a dose corresponding to 0.045-0.36g Al 2+ + 2g per g with concomitant addition of dissolved salt in a dose of 0.2g to 1g. 66 g 2 + 2 - Ca per 1 g 30. The method is suitable for treatment of industrial waters, wastewater and mine water treatment, water finishing in water supply. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS238467B1 true CS238467B1 (en) | 1985-11-13 |
Family
ID=5411701
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS646183A CS238467B1 (en) | 1983-09-05 | 1983-09-05 | A method of precipitating sulfate ions from wastewater by adding wastewater from the production of aluminumbenzene-containing ethylbenzene, at a dose corresponding to 0.045-0.36g Al 2+ + 2g per g with concomitant addition of dissolved salt in a dose of 0.2g to 1g. 66 g 2 + 2 - Ca per 1 g 30. The method is suitable for treatment of industrial waters, wastewater and mine water treatment, water finishing in water supply. |
| CS842562A CS253313B1 (en) | 1983-09-05 | 1984-04-03 | Process for preparing (Z) -3- (hydroxymethylene) -dihydro-2 (3H) -furanone sodium salt |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS842562A CS253313B1 (en) | 1983-09-05 | 1984-04-03 | Process for preparing (Z) -3- (hydroxymethylene) -dihydro-2 (3H) -furanone sodium salt |
Country Status (1)
| Country | Link |
|---|---|
| CS (2) | CS238467B1 (en) |
-
1983
- 1983-09-05 CS CS646183A patent/CS238467B1/en unknown
-
1984
- 1984-04-03 CS CS842562A patent/CS253313B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS253313B1 (en) | 1987-11-12 |
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