CN1136302C - 一种用于清洗苯胺与甲醛缩合反应沉淀物的方法 - Google Patents
一种用于清洗苯胺与甲醛缩合反应沉淀物的方法 Download PDFInfo
- Publication number
- CN1136302C CN1136302C CNB021099707A CN02109970A CN1136302C CN 1136302 C CN1136302 C CN 1136302C CN B021099707 A CNB021099707 A CN B021099707A CN 02109970 A CN02109970 A CN 02109970A CN 1136302 C CN1136302 C CN 1136302C
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- cleaning
- inert solvent
- heat exchanger
- outlet pressure
- pressure reduction
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CNB021099707A CN1136302C (zh) | 2002-01-09 | 2002-01-09 | 一种用于清洗苯胺与甲醛缩合反应沉淀物的方法 |
Applications Claiming Priority (1)
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CNB021099707A CN1136302C (zh) | 2002-01-09 | 2002-01-09 | 一种用于清洗苯胺与甲醛缩合反应沉淀物的方法 |
Publications (2)
Publication Number | Publication Date |
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CN1361239A CN1361239A (zh) | 2002-07-31 |
CN1136302C true CN1136302C (zh) | 2004-01-28 |
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Application Number | Title | Priority Date | Filing Date |
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CNB021099707A Expired - Lifetime CN1136302C (zh) | 2002-01-09 | 2002-01-09 | 一种用于清洗苯胺与甲醛缩合反应沉淀物的方法 |
Country Status (1)
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CN (1) | CN1136302C (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101555441B (zh) * | 2008-04-09 | 2012-03-21 | 中国神华能源股份有限公司 | 清洗剂和ggh换热组件的清洗工艺 |
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2002
- 2002-01-09 CN CNB021099707A patent/CN1136302C/zh not_active Expired - Lifetime
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Publication number | Publication date |
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CN1361239A (zh) | 2002-07-31 |
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Legal Events
Date | Code | Title | Description |
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C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Wanhua Polyurethane Co., Ltd. Assignor: Yantai Wanhua Polyurethane Co., Ltd. Contract fulfillment period: 2007.11.13 to 2013.12.30 Contract record no.: 2008990000227 Denomination of invention: Inert solvent for cleaning deposited reactant and its cleaning method Granted publication date: 20040128 License type: Exclusive license Record date: 20080804 |
|
LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.11.13 TO 2013.12.30 Name of requester: NINGBO WANHUA POLYURETHANE CO., LTD. Effective date: 20080804 |
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C56 | Change in the name or address of the patentee |
Owner name: WANHUA CHEMICAL GROUP CO., LTD. Free format text: FORMER NAME: YANTAI WANHUA POLYURETHANE CO., LTD. |
|
CP01 | Change in the name or title of a patent holder |
Address after: 264002 No. 2 happy South Road, Zhifu District, Shandong, Yantai Patentee after: Wanhua Chemical Group Co., Ltd. Address before: 264002 No. 2 happy South Road, Zhifu District, Shandong, Yantai Patentee before: Yantai Wanhua Polyurethane Co., Ltd. |
|
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20040128 |