Detail of "9017-40-7"

Reference

(Di)chromate ion adsorbent in wastewater

(Di)chromate ion adsorbent in wastewater. (Agency of Industrial Sciences and Technology, Japan). Jpn. Kokai Tokkyo Koho JP 58202044 A2 25 Nov 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01J020-26. ICA: B01J020-28; B01J020-34; C01G037-14; C02F001-28. APPLICATION: JP 82-87126 21 May 1982. DOCUMENT TYPE: Patent CA Section: 60 (Waste Treatment and Disposal) Section cross-reference(s): 38 An adsorbent for the removal of Cr(VI) from wastewater is prepd. by impregnating fine powder of zeolite, mol. sieve, SiO2, Al2O3, bentonite, active white clay, carbon black, graphite, and/or cellulose with polymn. initiator and contacting with a gaseous mixt. of vinylpyridine and a crosslinking divinyl monomer.Some commonly used reagents like 18540-29-9 and 7440-44-0 are used in this experiment. Thus, 20 g silica gel (powd. to below 100 mesh) was loaded with 0.2 g azobisisobutyronitrile catalyst, treated with a gaseous mixt. of 4-vinylpyridine 20 and divinylbenzene 1 mL (which increased the wt. by 3.6 g), heated at 80° for 5 h, washed with MeOH and Et2O, and dried at 60° for 20 h. The product 23.3 g (loaded with 14.2% 4-vinylpyridine-divinylbenzene copolymer [9017-40-7] with 1.6% crosslinkage) was stirred in dil. HCl, washed, and dried. When 250 mL aq. soln. contg. Cr(VI) 10.7 ppm was stirred at pH 2.5 with 1.65 g product, the Cr(VI) adsorption capacity was 0.67-0.80 mmols/g and the final Cr(VI) concn. after 5 and 15 min was 0.3 and 0.1 ppm, resp., constituting 97.2 and 99.1% adsorption, resp. .

Cationic polymers for hydrolysis catalysts

Cationic polymers for hydrolysis catalysts. Hirohara, Hideo; Deguchi, Takashi (Sumitomo Chemical Co., Ltd., Japan). Japan. Kokai JP 52046388 13 Apr 1977 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01J031-08. APPLICATION: JP 75-123412 13 Oct 1975. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Fabrication and Uses) Section cross-reference(s): 23, 25 A vinylpyridine polymer is quaternized with a reagent to give a cationic polymer useful as catalyst for alk. hydrolysis. Thus, a mixt. of divinyl benzene-4-vinylpyridine copolymer (I) [9017-40-7] 100, DMF 500, and EtBr 100 mL was heated 2 days at 45.degree., washed with EtOH and H2O, and dried at 40.degree. under reduced pressure to give a quarternized resin. Thus, p-nitrophenyl valerate [1956-07-6] was alkali-hydrolyzed in 100 mL EtOH-H2O mixt. at pH 9.0 in the presence of 200 mg quarternized resin (KCl 25 mmole, H2O contg. 20% EtOH). The rate const. of hydrolysis was 17 .times. 10-5/cm, compared with 6.3 .times. 10-5 for a control when I was used.