JPS6447746A - Production of 5-amino-2,4,-triiodoisophthalic acid - Google Patents

Production of 5-amino-2,4,-triiodoisophthalic acid

Info

Publication number
JPS6447746A
JPS6447746A JP20422687A JP20422687A JPS6447746A JP S6447746 A JPS6447746 A JP S6447746A JP 20422687 A JP20422687 A JP 20422687A JP 20422687 A JP20422687 A JP 20422687A JP S6447746 A JPS6447746 A JP S6447746A
Authority
JP
Japan
Prior art keywords
filtrate
aipa
amino
active carbon
raw material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP20422687A
Other languages
Japanese (ja)
Other versions
JPH0788337B2 (en
Inventor
Kazuo Oguri
Hiroharu Kageyama
Ryoichi Seki
Yoshinori Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP62204226A priority Critical patent/JPH0788337B2/en
Publication of JPS6447746A publication Critical patent/JPS6447746A/en
Publication of JPH0788337B2 publication Critical patent/JPH0788337B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE:To obtain 5-amino-2,4,6-triiodophthalic acid (AIPA) useful as an intermediate for Roentgen contrast medium having extremely low intravenous toxicity, by treating filtrate after crystal separation obtained by producing AIPA with an active carbon and then concentrating the filtrate in order to re-utilizing the filtrate. CONSTITUTION:When 5-amino-2,4,6-triiodoisophthalic acid (AIPA) is produced, a filtrate obtained by separating a product crystal is treated with an active carbon or ion exchange resin to decolorize and purify the filtrate. Then the filtrate is concentrated and excess water and hydrochloric acid is distilled out to give about 20wt.% aqueous hydrochloric acid solution containing AIPA and other unreacted material, which is then re-utilized as a raw material of AIPA for dissolving iodine monochloride or as a reaction solvent. By the above- mentioned method, unit consumption of the raw material is improved and waste treating process is simplified or obviated.
JP62204226A 1987-08-19 1987-08-19 Process for producing 5-amino-2,4,6-triiodoisophthalic acid Expired - Fee Related JPH0788337B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62204226A JPH0788337B2 (en) 1987-08-19 1987-08-19 Process for producing 5-amino-2,4,6-triiodoisophthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204226A JPH0788337B2 (en) 1987-08-19 1987-08-19 Process for producing 5-amino-2,4,6-triiodoisophthalic acid

Publications (2)

Publication Number Publication Date
JPS6447746A true JPS6447746A (en) 1989-02-22
JPH0788337B2 JPH0788337B2 (en) 1995-09-27

Family

ID=16486928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204226A Expired - Fee Related JPH0788337B2 (en) 1987-08-19 1987-08-19 Process for producing 5-amino-2,4,6-triiodoisophthalic acid

Country Status (1)

Country Link
JP (1) JPH0788337B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303772A (en) * 1991-03-30 1992-10-27 Shimadzu Corp Automatic analyzer for biochemistry

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB785670A (en) * 1955-03-21 1957-10-30 Schering Corp Improvements in or relating to chemical compounds for use as x-ray diagnostic agentsand to processes for their preparation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB785670A (en) * 1955-03-21 1957-10-30 Schering Corp Improvements in or relating to chemical compounds for use as x-ray diagnostic agentsand to processes for their preparation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303772A (en) * 1991-03-30 1992-10-27 Shimadzu Corp Automatic analyzer for biochemistry

Also Published As

Publication number Publication date
JPH0788337B2 (en) 1995-09-27

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees