TH29900A - Methodology for Melamine Preparation - Google Patents
Methodology for Melamine PreparationInfo
- Publication number
- TH29900A TH29900A TH041208A TH041208A TH29900A TH 29900 A TH29900 A TH 29900A TH 041208 A TH041208 A TH 041208A TH 041208 A TH041208 A TH 041208A TH 29900 A TH29900 A TH 29900A
- Authority
- TH
- Thailand
- Prior art keywords
- melamine
- copolyoxymethylene
- molten
- unstable
- urea
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/30—Chemical modification by after-treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/10—Polymerisation of cyclic oligomers of formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/28—Post-polymerisation treatments
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Polyamides (AREA)
Abstract
DC60 (02/03/41) การประดิษฐ์เกี่ยวข้องกับระเบียบวิธี สำหรับการเตรียมเมลามีนจากยูเรีย ซึ่งเมลามีนเเข็ง จะได้มาโดยการส่งผ่านกระเเสเมลามีนที่ออกจากเตาไปยังชุดหล่อเย็น ผลิตภัณฑ์ ซึ่งกระแสเมลามีน จะถูกทำให้เย็นลงไปยังอุณหภูมิต่ำกว่า 175 องศาเซลเซียส โดยเฉพาะเจาะจงมากขึ้น มันเกียวข้องกับระเบียบ วิธีสำหรับการเตรียมเมลามีนจากยูเรีย ทางกระบวนการความดันสูงที่ไม่มีตัวเร่งปฏิกิริยา โดยการ ส่งผ่านเมลามีนที่หลอมเหลว ซึ่งออกจากเตาไปยังชุดหล่อเย็นผลิตภัณฑ์ ซึ่งเมลามีนจะถูกทำให้คืน กลับ โดยการทำให้เมลามีนที่หลอมเหลวเย็นลง ซึ่งใช้ตัวกลางที่ทำให้เย็น เมลามีนที่หลอมเหลว ซึ่งถูกทำให้เย็นลงไปที่อุณหภูมิต่ำกว่า 175 องศาเซลเซียส การประดิษฐ์เป็นการผลิตออกซิเมททิลีนโพโพลิเมอร์ ขึ้นอย่างประหยัดโดยที่มีความทนทานต่อความร้อนได้ที่เติม ดังนั้น โคโพลิออกซีเมททิลีนที่คงสภาพจะได้มาจากโคโพลิออกซีเมททิลีนที่มีส่วนปลายที่ไม่เสถียรด้วยการใช้เป็นโคโพลิออกซิเลททิลีนที่มีส่วนปลายที่ไม่เสถียร DC60 (02/03/41) Invention involves methodology. For the preparation of melamine from urea Which melamine It is obtained by passing the melamine gas from the furnace to the product cooling unit, where the melamine flow Will be cooled to a more specific temperature below 175 ° C It is related to regulations. Method for preparing melamine from urea Through a catalytic-free high-pressure process by transmission of molten melamine Which goes from the oven to the product cooling unit Where melamine is recovered by cooling the molten melamine. Which uses a cooling medium Molten melamine Which was cooled to a temperature below 175 ° C. The invention was the production of oxymethylene polymers. Thus, stable copolyoxymethylene is obtained from unstable copolyoxymethylene with a tip. It is a copolyoxylate, ethylene with an unstable tip.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33373796A JP3210872B2 (en) | 1996-12-13 | 1996-12-13 | Method for producing stabilized oxymethylene copolymer |
Publications (1)
Publication Number | Publication Date |
---|---|
TH29900A true TH29900A (en) | 1998-09-04 |
Family
ID=18269398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TH041208A TH29900A (en) | 1996-12-13 | 1997-12-11 | Methodology for Melamine Preparation |
Country Status (8)
Country | Link |
---|---|
JP (1) | JP3210872B2 (en) |
KR (1) | KR100542901B1 (en) |
CN (1) | CN1105126C (en) |
AU (1) | AU738001B2 (en) |
MY (1) | MY116970A (en) |
SG (1) | SG67417A1 (en) |
TH (1) | TH29900A (en) |
TW (1) | TW438841B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008018966A1 (en) | 2008-04-16 | 2009-10-22 | Ticona Gmbh | Process for the preparation of oxymethylene polymers and apparatus suitable therefor |
CN104302683B (en) | 2012-05-14 | 2017-07-28 | 三菱瓦斯化学株式会社 | Aoxidize the manufacture method of methylene base co-polymer |
CN103063665B (en) * | 2012-12-26 | 2015-04-29 | 中国海洋石油总公司 | Determination method for content of boron trifluoride in formaldehyde copolymerization catalyst |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51125A (en) * | 1974-06-19 | 1976-01-05 | Meisei Kogyo Kk | Kenchikuyohekitaino kyojiunpantachiokoshiki |
JPS517547A (en) * | 1974-07-09 | 1976-01-21 | Mitsubishi Electric Corp | KOSHUHAKANETSUSOCHI |
JPS57537A (en) * | 1980-06-02 | 1982-01-05 | Toshiba Corp | Balance working method for rotatable body |
JPS59249A (en) * | 1982-06-25 | 1984-01-05 | Nec Corp | Fault detecting system of looped communication network |
US4692290A (en) * | 1985-11-12 | 1987-09-08 | Celanese Corporation | Process for devolatilizing molten oxymethylene polymer |
JPH0772220B2 (en) * | 1986-11-17 | 1995-08-02 | 三菱瓦斯化学株式会社 | Method for stabilizing oxymethylene copolymer |
JP3230554B2 (en) * | 1994-02-23 | 2001-11-19 | 旭化成株式会社 | Production method of polyoxymethylene with excellent color tone and thermal stability |
JPH1031028A (en) * | 1996-07-15 | 1998-02-03 | Mitsubishi Electric Corp | Airtight assembly of electronic part, and its manufacture |
-
1996
- 1996-12-13 JP JP33373796A patent/JP3210872B2/en not_active Expired - Lifetime
-
1997
- 1997-09-08 SG SG1997003336A patent/SG67417A1/en unknown
- 1997-09-10 AU AU37450/97A patent/AU738001B2/en not_active Ceased
- 1997-09-11 MY MYPI97004205A patent/MY116970A/en unknown
- 1997-10-02 TW TW086114359A patent/TW438841B/en not_active IP Right Cessation
- 1997-12-11 TH TH041208A patent/TH29900A/en unknown
- 1997-12-12 KR KR1019970068174A patent/KR100542901B1/en not_active IP Right Cessation
- 1997-12-12 CN CN97125490A patent/CN1105126C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1105126C (en) | 2003-04-09 |
KR100542901B1 (en) | 2006-08-30 |
SG67417A1 (en) | 1999-09-21 |
CN1191226A (en) | 1998-08-26 |
AU3745097A (en) | 1998-06-18 |
JP3210872B2 (en) | 2001-09-25 |
AU738001B2 (en) | 2001-09-06 |
JPH10168144A (en) | 1998-06-23 |
MY116970A (en) | 2004-04-30 |
KR19980064083A (en) | 1998-10-07 |
TW438841B (en) | 2001-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RO116276B1 (en) | Process for purifying melamine | |
EA199900405A1 (en) | HYDROCARBON GAS PROCESSING | |
BR0113958A (en) | Process and apparatus for the production and cooling of titanium dioxide | |
BR9915040A (en) | Method to produce pure melamine | |
TH29900A (en) | Methodology for Melamine Preparation | |
BR9510606A (en) | Melamine purification process | |
EP0984946B1 (en) | Method for preparing melamine | |
DK1360164T3 (en) | Preparation of potassium formate | |
BR0113799A (en) | Process for producing high purity melamine from urea | |
KR850005425A (en) | Anhydrous high pressure melamine synthesis method | |
KR100621290B1 (en) | Method for preparing melamine | |
AR030115A1 (en) | PROCEDURE FOR THE PREPARATION OF MELAMINE | |
AU728823B2 (en) | Method for preparing melamine | |
US3308123A (en) | Method of separating melamine from waste gas | |
BR9107127A (en) | PROCESS FOR THE PREPARATION OF MELAMINE FROM UREA | |
EP0983250B1 (en) | Method for preparing melamine | |
TW372966B (en) | Method for preparation of melamine | |
ATE307861T1 (en) | METHOD AND INSTALLATION FOR THE THERMAL CRACKING OF HYDROCARBONS, IN PARTICULAR FOR THE PRODUCTION OF OLEFINS | |
NO20021600L (en) | Process for producing melamine | |
PL349442A1 (en) | Method for purifying melamine | |
TH52995A (en) | Process for preparing melamine from urea | |
TH52996A (en) | Process for preparing melamine from urea | |
TH25484B (en) | Process for preparing melamine from urea | |
PL49970B1 (en) | ||
NO20023621D0 (en) | Process for the preparation of melamine from urea |