GB1364229A - Process for the preparation of m- and p-phenylenediamine from iso phthalic acid diamide - Google Patents
Process for the preparation of m- and p-phenylenediamine from iso phthalic acid diamideInfo
- Publication number
- GB1364229A GB1364229A GB1543773A GB1543773A GB1364229A GB 1364229 A GB1364229 A GB 1364229A GB 1543773 A GB1543773 A GB 1543773A GB 1543773 A GB1543773 A GB 1543773A GB 1364229 A GB1364229 A GB 1364229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diamide
- phenylenediamine
- preparation
- advantageously
- acid diamide
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyamides (AREA)
Abstract
1364229 Prep. of m and p-phenylenediamine AKZO NV 30 March 1973 [1 April 1972] 15437/73 Heading C2C m and p-Phenylenediamine is prepared by a process which comprises subjecting isophthalic acid diamide or terephthalic acid diamide to Hofmann degradation. The first stage of the degradation in the formation of N-haloamide is preferably carried out at 0 to 30‹ C. Suitable hypohalites for the process are the hypohalites and hypobromites of sodium, potassium, calcium and barium. Advantageously there are employed aqueous suspensions containing 3 to 10% by weight of the diamide for the preparation of m-phenylene diamine and aqueous suspensions containing 3 to 5% by weight of the diamide for the preparation of p-phenylenediamine. The ratios of equivalents of hypohalite to moles of diamide is advantageously between 2 : 1 and 2À7:1 and for the equivalents of hydroxide to moles of diamide is advantageously between 8 : 1 and 10 : 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722216115 DE2216115C3 (en) | 1972-04-01 | 1972-04-01 | Process for the preparation of m- and p-phenylenediamine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1364229A true GB1364229A (en) | 1974-08-21 |
Family
ID=5840930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1543773A Expired GB1364229A (en) | 1972-04-01 | 1973-03-30 | Process for the preparation of m- and p-phenylenediamine from iso phthalic acid diamide |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5761021B2 (en) |
| AT (1) | AT321268B (en) |
| BE (1) | BE797559A (en) |
| CA (1) | CA998067A (en) |
| CH (1) | CH582128A5 (en) |
| DD (1) | DD106637A5 (en) |
| DE (1) | DE2216115C3 (en) |
| ES (1) | ES413226A1 (en) |
| FR (1) | FR2178976B1 (en) |
| GB (1) | GB1364229A (en) |
| IT (1) | IT988136B (en) |
| NL (1) | NL7304529A (en) |
| SU (1) | SU504477A3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110437080A (en) * | 2019-08-13 | 2019-11-12 | 上海哈峰新材料科技有限公司 | The preparation method of m-phenylene diamine (MPD) |
| CN111440074A (en) * | 2020-03-24 | 2020-07-24 | 深圳有为技术控股集团有限公司 | Hofmann rearrangement method for preparing m-phenylenediamine |
| CN112174828A (en) * | 2020-10-29 | 2021-01-05 | 山东兴强化工产业技术研究院有限公司 | Method for preparing m-phenylenediamine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2449983C1 (en) * | 2010-12-23 | 2012-05-10 | Открытое акционерное общество "Каустик" (ОАО "Каустик") | METHOD OF PRODUCING n-PHENYLENEDIAMINE |
| TW202111096A (en) * | 2019-07-02 | 2021-03-16 | 日商Ｄｉｃ股份有限公司 | Liquid crystal composition and liquid crystal display element meeting the various properties required for an n-type liquid crystal composition having a negative delta epsilon |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL272148A (en) * | 1960-12-07 |
-
1972
- 1972-04-01 DE DE19722216115 patent/DE2216115C3/en not_active Expired
-
1973
- 1973-03-13 IT IT4877873A patent/IT988136B/en active
- 1973-03-28 CA CA167,344A patent/CA998067A/en not_active Expired
- 1973-03-29 DD DD16982473A patent/DD106637A5/xx unknown
- 1973-03-30 SU SU1899021A patent/SU504477A3/en active
- 1973-03-30 FR FR7311669A patent/FR2178976B1/fr not_active Expired
- 1973-03-30 BE BE129462A patent/BE797559A/en unknown
- 1973-03-30 AT AT282073A patent/AT321268B/en not_active IP Right Cessation
- 1973-03-30 CH CH459573A patent/CH582128A5/xx not_active IP Right Cessation
- 1973-03-30 GB GB1543773A patent/GB1364229A/en not_active Expired
- 1973-03-31 ES ES413226A patent/ES413226A1/en not_active Expired
- 1973-03-31 NL NL7304529A patent/NL7304529A/xx not_active Application Discontinuation
- 1973-04-02 JP JP3771873A patent/JPS5761021B2/ja not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110437080A (en) * | 2019-08-13 | 2019-11-12 | 上海哈峰新材料科技有限公司 | The preparation method of m-phenylene diamine (MPD) |
| CN111440074A (en) * | 2020-03-24 | 2020-07-24 | 深圳有为技术控股集团有限公司 | Hofmann rearrangement method for preparing m-phenylenediamine |
| CN112174828A (en) * | 2020-10-29 | 2021-01-05 | 山东兴强化工产业技术研究院有限公司 | Method for preparing m-phenylenediamine |
| CN112174828B (en) * | 2020-10-29 | 2022-01-07 | 山东兴强化工产业技术研究院有限公司 | Method for preparing m-phenylenediamine |
| WO2022088303A1 (en) * | 2020-10-29 | 2022-05-05 | 山东兴强化工产业技术研究院有限公司 | Method for preparing m-phenylenediamine |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7304529A (en) | 1973-10-03 |
| DE2216115B2 (en) | 1979-05-03 |
| CH582128A5 (en) | 1976-11-30 |
| DD106637A5 (en) | 1974-06-20 |
| ES413226A1 (en) | 1976-01-01 |
| AT321268B (en) | 1975-03-25 |
| JPS5761021B2 (en) | 1982-12-22 |
| DE2216115C3 (en) | 1980-01-17 |
| CA998067A (en) | 1976-10-05 |
| JPS4913125A (en) | 1974-02-05 |
| IT988136B (en) | 1975-04-10 |
| BE797559A (en) | 1973-07-16 |
| SU504477A3 (en) | 1976-02-25 |
| DE2216115A1 (en) | 1973-10-04 |
| FR2178976B1 (en) | 1976-05-21 |
| FR2178976A1 (en) | 1973-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |