Réaction #8953

Équation de réaction

L-arginine methyl ester dihydrochloride

disodium phosphate 12 hydrate

polyoxyethylene lauryl ether

→

L-arginine

Solvants

water

sodium hydroxide

Conditions de réaction

Traitement

1. 1
   Autreto prepare a treating agent solution
2. 2
   workup.ADDITIONtreated
3. 3
   Lavagewashed with water
4. 4
   Autredried
5. 5
   Autreto uniformly absorb the total amount of the above treating agent solution
6. 6
   Autreair-dried for 3 hours at room temperature
7. 7
   workup.ADDITIONThe dried cloth was heat-treated for 40 minutes at 150° C. in a batch type hot air oven (“IPHH-2000”, an inert oven manufactured by Tabaiesbeck Co., Ltd.)
8. 8
   Lavagewashed with water
9. 9
   LavageIt was further washed with 5% aqueous sodium bicarbonate solution
10. 10
    Lavagerinsed three times with water
11. 11
    Lavagesubsequently was washed with 10% aqueous citric acid solution
12. 12
    Lavagerinsed three times with water
13. 13
    Lavagefinally washed with household
14. 14
    Lavagewashing detergent solution
15. 15
    Lavagerinsed with water
16. 16
    Autreair-dried

Mode opératoire

2.61 Grams (10 mmol) of L-arginine methyl ester dihydrochloride, 1.11 g (3.1 mmol) of disodium phosphate 12 hydrate and 0.1 g of polyoxyethylene lauryl ether (“Newcol 1100”, nonionic surfactant produced by Nippon Nyukazai Co., Ltd.) were dissolved in 5.0 ml of water to prepare a treating agent solution. A cotton cloth (150 mm×170 mm, 4.8 g) was in advance treated to be immersed in 25% aqueous sodium hydroxide solution for an hour at room temperature, washed with water and dried. This treated cotton cloth was allowed to uniformly absorb the total amount of the above treating agent solution and then air-dried for 3 hours at room temperature. The dried cloth was heat-treated for 40 minutes at 150° C. in a batch type hot air oven (“IPHH-2000”, an inert oven manufactured by Tabaiesbeck Co., Ltd.) and washed with water. It was further washed with 5% aqueous sodium bicarbonate solution and rinsed three times with water and subsequently was washed with 10% aqueous citric acid solution and rinsed three times with water, and finally washed with household washing detergent solution, rinsed with water and air-dried. The identification of L-arginine cellulose ester was conducted by the following method. A part of the cloth was cut and a solution of ninhydrin in butanol was sprayed on it. Thereafter, it was heated for 10 minutes in an oven of 110° C. to cause coloring thereby the presence of the amino acid was confirmed. Also, a part of the cloth was cut and subjected to an infrared spectroscopic analysis whereby there was confirmed a peak based on ester bond at 1720–1740 cm−1. As a result of determination for the amount of the bonded L-arginine, it was 0.08 mmol based on 1 g of the cloth. The degree of esterfication was 0.013.

Source