Gas separation: apparatus – Solid sorbent apparatus – Plural solid sorbent beds
Patent
1973-11-21
1976-03-30
Brown, J. Travis
Gas separation: apparatus
Solid sorbent apparatus
Plural solid sorbent beds
96137, G03C 114
Patent
active
039472752
ABSTRACT:
A sensitized gelatino-silver halide emulsion comprising a supersensitizing combination of at least one sensitizing dye represented by general formula I: ##SPC1##
wherein R.sub.1, R.sub.2 and R.sub.3 are each a member selected from the group consisting of an alkyl having up to 6 carbon atoms and a substituted alkyl group having up to 6 carbon atoms, at least one of R.sub.1, R.sub.2 and R.sub.3 being a substituted alkyl group having a sulfo group therein; R.sub.4 is a hydrogen atom or forms an alkylene linkage together with R.sub.2 ; Z.sub.1 is an atomic group necessary for completing a benzimidazole nucleus; A.sub.1 and A.sub.2 are each a member selected from the group consisting of a hydrogen atom, a phenyl group, a halogen atom, a carboxyl group, an alkoxy carbonyl group, an alkyl group, an alkoxyl group, a hydroxyl group, a trifluoromethyl group, and a cyano group, A.sub.2 being capable of condensing with A.sub.1 or A.sub.3 to form a benzene nucleus; and A.sub.3 is a member selected from the group consisting of a hydrogen atom and an alkyl group; at least one substituent for A.sub.1, A.sub.2 or A.sub.3 entering the benzoxazole nucleus when R.sub.2 and R.sub.4 are bridged by an alkylene group and Z.sub.1 is substituted with identical halogen atoms; and at least one of sensitizing dyes represented by general formula II: ##SPC2##
in which R.sub.5, R.sub.6, R.sub.7 and R.sub.8 have the same meaning as those of R.sub.1, R.sub.2 and R.sub.3 above and additionally are a carbamoylalkyl group, at least one of R.sub.5, R.sub.6, R.sub.7 and R.sub.8 being a substituted alkyl group having a member selected from the group consisting of a sulfo group and a carboxyl group; Z.sub.2 and Z.sub.3 are atomic groups necessary for forming a benzimidazole nucleus; X.sup.- is an acid anion and n is an integer of from 1 to 2, n being 1 when an intramolecular salt is formed.
REFERENCES:
patent: 2973264 (1961-02-01), Nys et al.
patent: 3173791 (1965-03-01), Kalenda
patent: 3672898 (1972-06-01), Schwan et al.
patent: 3769025 (1973-10-01), Ohkubo et al.
patent: 3794498 (1974-02-01), Yao
Ogawa Akira
Sato Akira
Shiba Keisuke
Brown J. Travis
Fuji Photo Film Co. , Ltd.
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