Aldehyde scavenger and method for removing aldehydes

Patent metadata

Field	Value
Publication number	US-11439721-B2
Application number	US-201716466232-A
Country	US
Kind code	B2
Filing date	Dec 27, 2017
Priority date	Dec 28, 2016
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

To provide an aldehyde scavenger and a method for removing aldehydes by using the same, for quickly and continuously capturing aldehydes. An aldehyde scavenger comprising at least one O-substituted hydroxylamine or at least one chemically acceptable salt thereof, is used against an aldehyde generation source.

First claim

The invention claimed is:

1. A method for removing aldehydes, comprising:
bringing an aldehyde scavenger into contact with an aldehyde generation source to remove the aldehydes,
wherein the aldehyde scavenger includes at least one O-substituted hydroxylamine, or at least one chemically acceptable salt of the O-substituted hydroxylamine, and the chemically acceptable salt is at least one of a hydrochloride, a hydrobromide, a perchlorate, a silicate, a tetrafluoroborate, a hexafluorophosphate, a sulfate, a nitrate, a phosphate, an acetate, a citrate, a fumarate, a maleate, a trifluoromethanesulfonate, a trifluoroacetate, a benzoate, and a p-toluenesulfonic acid salt,
wherein the O-substituted hydroxylamine has formula (1)
R 1 —ONH 2   (1)

where R 1 is a methyl group or an ethyl group which, at a chemically acceptable position, is substituted by at least a carboxy group and is optionally further substituted by a phenyl group.

2. The method of claim 1 , wherein R 1 is one of a carboxymethyl group, a 1-carboxyethyl group, a 2-carboxyethyl group, an α-carboxy benzyl group, an α-carboxy-phenethyl group, and a β-carboxy-phenethyl group.

3. The method of claim 1 , wherein R 1 is a carboxymethyl group.

4. The method of claim 1 , wherein the aldehyde scavenger is included in an aqueous solution and brought into contact with the aldehyde generation source.

5. The method of claim 2 , wherein the aldehyde scavenger is included in an aqueous solution and brought into contact with the aldehyde generation source.

6. The method of claim 3 , wherein the aldehyde scavenger is included in an aqueous solution and brought into contact with the aldehyde generation source.

7. The method of claim 4 , wherein a content of the aldehyde scavenger included in an aqueous solution is within a range of from 1 to 50 wt %.

8. The method of claim 5 , wherein a content of the aldehyde scavenger included in an aqueous solution is within a range of from 1 to 50 wt %.

9. The method of claim 6 , wherein a content of the aldehyde scavenger included in an aqueous solution is within a range of from 1 to 50 wt %.

10. The method of claim 1 , wherein the aldehyde scavenger is supported on a carrier which is insoluble in water.

11. The method of claim 2 , wherein the aldehyde scavenger is supported on a carrier which is insoluble in water.

12. The method of claim 3 , wherein the aldehyde scavenger is supported on a carrier which is insoluble in water.

13. The method of claim 1 , wherein the aldehyde scavenger is supported on a polymeric carrier or an inorganic carrier which are insoluble in water.

14. The method of claim 2 , wherein the aldehyde scavenger is supported on a polymeric carrier or an inorganic carrier which are insoluble in water.

15. The method of claim 3 , wherein the aldehyde scavenger is supported on a polymeric carrier or an inorganic carrier which are insoluble in water.

16. The method of claim 1 , wherein the aldehyde generation source comprises a plywood or an automobile ceiling material.

Assignees

• Tosoh Corp
• Sagami Chem Res Inst

Inventors

• Sudo Yukinori
• Masuda Takahiro
• Kobayashi Osamu
• OZAKI Takuri
• Hirai Kenji

Classifications

• B01D2252/2041

  Diamines · CPC title

• B01D2252/20431

  Tertiary amines · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title

• B01D2257/708

  Volatile organic compounds V.O.C.'s · CPC title

• B01D2253/25

  Coated, impregnated or composite adsorbents · CPC title