Carbon Dioxide → Maleic acid, calcium salt

HRID 1032857

반응식

HRID 1032857 반응식
C1(=O)OC(=O)C=C1.[C:8]([OH:17])(=[O:16])[CH:9]([CH:11]([C:13]([OH:15])=[O:14])O)O.C(=O)([O-])[O-].[Ca+2:22].C(C(C(C([O-])=O)O)O)([O-])=O.[Na+].[Na+].[OH-].[Ca+2].[OH-].C([O-])(=O)/C=C\C([O-])=O.[Na+].[Na+].C(=O)=O>O>[C:8]([O-:17])(=[O:16])/[CH:9]=[CH:11]\[C:13]([O-:15])=[O:14].[Ca+2:22]

참가 물질

9

반응물 7

HCID 280Carbon DioxideHCID 8752,3-Dihydroxybutanedioic AcidHCID 7923Maleic AnhydrideHCID 10112Calcium CarbonateHCID 13355Disodium 2,3-dihydroxybutanedioate3회HCID 6093208Calcium Hydroxide2회HCID 6364608Maleic acid, disodium salt

생성물 1

HCID 6916005Maleic acid, calcium salt

시약·촉매·용매 1

HCID 962Water용매3회

반응 조건

온도
85 °C

실험 절차

Maleic anhydride (109.21 g, 1.114 mole) was added to 200 ml of water in a three liter 4-neck flask that was equipped with a mechanical stirrer, thermometer, air sweep inlet and condenser with receiver. The mixture was heated to 85° C. and then 115.57 g, (0.77 mole) of tartaric acid was added along with 25 ml more water. Calcium carbonate (135.54 g, 1.355 mole) was slurried with 112 ml water and added slowly to the reactor. Alternating portions of disodium tartrate solution and calcium hydroxide were added to the reactor while maintaining the heat at 85° C. The total charge of calcium hydroxide was 51.87 g (0.700 mole). The disodium tartrate solution added contained disodium tartrate (277.42 g, 1.43 moles) and disodium maleate (141.81 g, 0.8863 mole). After the reaction to drive off the carbon dioxide and form calcium maleate was complete, the air sweep was begun while holding the reaction temperature at about ~91° C. A total of 730 ml water was collected in the receiver. Then sodium hydroxide, 93.91 g (1.1674 mole) was added and the reaction held at about ~91° C. for eighty minutes more. An additional 270 ml water was removed from the system over the course of the synthesis reaction. The reaction was then quenched and cooled with 230 ml of water (Sample A).

후처리

  1. customwas equipped with a mechanical stirrer
  2. additionadded slowly to the reactor
  3. temperaturewhile maintaining the
  4. temperatureheat at 85° C
  5. customAfter the reaction

출처 및 근거

ORD 기록
ord-beee8b42ad164d74a43fe6684a21ff88
출처 데이터셋
uspto-grants-1990_09
특허 번호
US04959496

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