Title:
ANTIFORMING AGENT FOR PHOSPHORIC ACID PREPARATION PROCESS
Document Type and Number:
Japanese Patent JP3696368
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable effective removal, control, etc., of foams generated in preparation of phosphoric acid by a method wherein an antifoaming agent used in the process is prepared from a compound expressed by the formula.
SOLUTION: As an antifoaming agent for phosphoric acid preparation process, a compound expressed by the formula R1-O-(R2-O)n-H (in the formula, R1 represents secondary alkyl group, R2 represents hydrocarbon group, and (n) is an integer of 1 or over.) is used. R2 is preferably a 2-4C alkylene group, farther preferably an ethylene group, and when R2 is groups more than two kinds, one kind thereof is preferably an ethylene group. The (R2-O)n part of the formula is obtained by additively polymerizing alkylene oxide or the like or ethylene oxide, propylene oxides, epichlorhydrin, etc. Further, in order to develope an excellent antifoaming effect, HLB of the antifoaming agent is preferably 10 or under. An additive amount of the antifoaming agent is preferably about 10 to 10,000 ppm to rock phosphate.
Inventors:
Takeaki Mizusashi
Kaoru Komiya
Kaoru Komiya
Application Number:
JP10955497A
Publication Date:
September 14, 2005
Filing Date:
April 25, 1997
Export Citation:
Assignee:
Asahi Denka Kogyo Co., Ltd.
International Classes:
B01D19/04; C08G65/32; C08G65/321; (IPC1-7): B01D19/04; C08G65/321
Domestic Patent References:
| JP60007909A |
Attorney, Agent or Firm:
Michiteru Soga
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa