Chemical agent comprising fluorine-containing polyaluminum chloride

Patent metadata

Field	Value
Publication number	US-2021340018-A1
Application number	US-202117369339-A
Country	US
Kind code	A1
Filing date	Jul 7, 2021
Priority date	Jan 8, 2019
Publication date	Nov 4, 2021
Grant date	—

Abstract

A chemical agent including a fluorine-containing polyaluminum chloride, wherein the chemical agent has 4,500 to 100,000 ppm by mass of fluorine per part by mass of aluminum. Also disclosed is a method for producing a fluorine-containing polyaluminum chloride.

First claim

1 . A chemical agent comprising a fluorine-containing polyaluminum chloride, wherein
the chemical agent has 4,500 to 100,000 ppm by mass of fluorine per part by mass of aluminum.

2 . The chemical agent according to claim 1 , which is in powder form.

3 . The chemical agent according to claim 1 , further comprising a solvent.

4 . The chemical agent according to claim 3 , wherein the solvent comprises water.

5 . The chemical agent according to claim 3 , which is in a form of a liquid material.

6 . The chemical agent according to claim 1 , which is a coagulant.

7 . A method for producing a fluorine-containing polyaluminum chloride, comprising
(a) reacting 100 parts by mass of an aqueous solution comprising 10 to 36 parts by mass of hydrogen chloride and 300 to 5,000 ppm by mass of fluorine, and an aluminum source compound to obtain a reaction mixture comprising the fluorine-containing polyaluminum chloride.

8 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , wherein (a) comprises reacting the aqueous solution comprising hydrogen chloride and fluorine, and the aluminum source compound at a pressure of 0 to 1.45 MPaG and a temperature of 100 to 200° C. to obtain the reaction mixture comprising the fluorine-containing polyaluminum chloride.

9 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , wherein (a) comprises reacting the aqueous solution comprising hydrogen chloride and fluorine and the aluminum source compound at a temperature of 70 to 99° C. and then at a pressure of 0 to 1.45 MPaG and a temperature of 100 to 200° C. to obtain the reaction mixture comprising the fluorine-containing polyaluminum chloride.

10 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , wherein, in (a), 100 parts by mass of the aqueous solution is reacted with the aluminum source compound comprising 5 to 35 parts by mass of aluminum in terms of aluminum oxide.

11 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , wherein the aluminum source compound is aluminum hydroxide.

12 . The method for producing a fluorine-containing polyaluminum chloride according to claim 11 , wherein the aluminum hydroxide sifts through a 50-mesh sieve and does not sift through a 1,250-mesh sieve.

13 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , further comprising drying the reaction mixture obtained in (a).

14 . The method for producing a fluorine-containing polyaluminum chloride according to claim 7 , further comprising adjusting basicity of the fluorine-containing polyaluminum chloride.

Assignees

• Daikin Ind Ltd
• Daikin Fluorochemicals China Co Ltd

Inventors

• Hatayama Ryo
• Hu Zhiyi
• Pan Hong
• Zhang Linjun
• Zhao Shihui
• Huang Wei
• Cai Xiaobo

Classifications

• C01P2002/54

  one element only · CPC title

• C01F7/57

  Basic aluminium chlorides, e.g. polyaluminium chlorides · CPC title

• C01P2006/80

  Compositional purity · CPC title

• C02F1/5245

  using basic salts, e.g. of aluminium and iron · CPC title

• B03D3/02 Primary

  Coagulation · CPC title