Maleic Anhydride → Citric Acid

HRID 726160

반응식

HRID 726160 반응식
O.[C:2]([OH:14])(=[O:13])[CH2:3][C:4]([CH2:9][C:10]([OH:12])=[O:11])([C:6]([OH:8])=[O:7])[OH:5].[CH:15]([NH2:22])([NH2:21])[CH2:16][CH2:17][CH2:18][CH2:19][CH3:20].C1(=O)OC(=O)C=C1.[OH-].[NH4+]>O>[C:2]([OH:14])(=[O:13])[CH2:3][C:4]([CH2:9][C:10]([OH:12])=[O:11])([C:6]([OH:8])=[O:7])[OH:5].[CH:15]([NH2:22])([NH2:21])[CH2:16][CH2:17][CH2:18][CH2:19][CH3:20]

참가 물질

7

반응물 4

HCID 7923Maleic AnhydrideHCID 14923Ammonium HydroxideHCID 222302-Hydroxy-1,2,3-propanetricarboxylic acid hydrate (1:1)HCID 134940Hexanediamine

생성물 2

HCID 311Citric AcidHCID 134940Hexanediamine

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A solution of 2.1 g (0.01 moles) of citric acid monohydrate (Formula weight 210) and 0.32 g (0.0028 moles) hexanediamine was added to 19.6 g (0.2 mole) maleic anhydride which had been dissolved in 40 ml water at 80°-95° C., and finally 30 g of 30% aqueous solution of ammonium hydroxide (0.22 mol NH3) was added. This solution was evaporated to dryness over a period of 30 minutes. The solid was then heated at 195°-220° C. for 10 minutes, removed from the heat, allowed to cool and broken up with a spatula. The solid was then heated at 230°-245° C. for 10 minutes, removed from the heat, allowed to cool and broken up with a spatula. Finally, the solid was heated at 230°-245° C. for 10-15 minutes, removed from the heat and allowed to cool to room temperature. The resulting water insoluble polymer was slurried in 40.0 ml of water and a solution of 8.0 g of sodium hydroxide in 12 ml of water was added over 5 minutes. The solution was stirred for 10-20 minutes to give a clear red-brown solution, pH 10-11.0 of a copolymer of polyaspartic acid, citric acid and hexanediamine. The tests for CaSO4, Example 3, and CaCO3 (below) were run and the result are recorded in Table 2.

후처리

  1. customThis solution was evaporated to dryness over a period of 30 minutes
  2. temperatureThe solid was then heated at 195°-220° C. for 10 minutes
  3. customremoved from the heat
  4. temperatureto cool
  5. temperatureThe solid was then heated at 230°-245° C. for 10 minutes
  6. customremoved from the heat
  7. temperatureto cool
  8. temperatureFinally, the solid was heated at 230°-245° C. for 10-15 minutes
  9. customremoved from the
  10. temperatureheat
  11. additiona solution of 8.0 g of sodium hydroxide in 12 ml of water was added over 5 minutes

출처 및 근거

ORD 기록
ord-44366acb24a84b8fbae20054184e5caa
출처 데이터셋
uspto-grants-1998_01
특허 번호
US05708126

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