Fibrous material for emulsion breaker and method for manufacturing it
AssigneeTeijin Limited
InventorsHideaki Suzuki, Tomoyoshi Ono, Wataru Yamamoto, Naoki Yamamoto
Life of this patent
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Abstract
A fibrous material useful for treating a waste water having a suitable amount and ratio of hydrophobic group and hydrophilic group is produced by reacting a fibrous material with sulfuric acid and/or chlorosulfonic acid, and then with alkylamines having 2 to 20 carbon atoms and optionally finally with, for example, ammonia, amines and/or hydrazines.
Claims10
An emulsion-treating fibrous material prepared by a chemical modification of insoluble fibrous material obtained by crosslinking with a sulfonyl group the fibrous material of aromatic monovinyl polymer;
- said fibrous material containing
- (a) 40 to 95 of the hydrophobic group of the formula [I'] which is part of the formula [I] per 100 of the aromatic nuclear structural units in the fibrous material;
- Formula [I']:
- --so.sub.2 nh--r' [i']
- where R' represents a hydrocarbon group having 2 to 20 carbon atoms;
- ##STR4## where X represents a phenylene and R represents a hydrogen atom or methyl originating from aromatic monovinyl, and
- (b) 1 to 30 of the hydrophilic group of the formula [II'] which is part of the group of the formula [II] per 100 of the aromatic nuclear structural units in the fibrous material;
- Formula [II']:
- --so.sub.2 a [ii']
- where A represents an atom or group selected from --Cl, --OH, --NH.sub.2, --NHNH.sub.2, --NHCH.sub.2 CH.sub.2 OH, --N(CH.sub.2 CH.sub.2 OH).sub.2, --NHCH.sub.3 and --N(CH.sub.3).sub.2 ;
- ##STR5## where R, X and A are as defined above.
A process for preparing a fibrous material, which comprises:
- (a) conducting a reaction between sulfuric acid, chlorosulfonic acid, or mixtures thereof and a fibrous material made from an aromatic monovinyl polymer to crosslink by sulfonyl group (--SO.sub.2 --) within a range of rate of crosslinking of 0.5% to 40% and to introduce sulfo groups sulfochloride groups, or mixtures thereof into the fibrous material,
- (b) reacting the partially crosslinked and sulfonated fibrous material, chlorosulfonated fibrous material or mixtures of sulfonated and chlorosulfonated fibrous material with alkylamines having alkyl groups of 2 to 20 carbon atoms to convert 40 to 95 of sulfo group, sulfochloride group, or mixtures thereof based on 100 of the aromatic nuclear units into --SO.sub.2 NHR' where R' represents a hydrocarbon group having 2 to 20 carbon atoms.
Dependencies are inferred from the claim text.