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1. 发明专利

JP2002145824A METHOD FOR HYDROGENATING TEREPHTHALIC ACID 审中-公开
公开(公告)号：JP2002145824A
公开(公告)日：2002-05-22
申请号：JP2001257425
申请日：2001-08-28
申请人： MITSUBISHI CHEM CORP
发明人： KAYOU ATSUSHI , NANBA YOSHIAKI
IPC分类号： C07C51/36 , C07B61/00 , C07C29/149 , C07C29/86 , C07C31/27 , C07C61/09
摘要： PROBLEM TO BE SOLVED: To provide a method for hydrogenating terephthalic acid to produce 1, 4-cyclohexanedimethanol while recirculatingly using the solvent. SOLUTION: This method for hydrogenating terephthalic acid comprises the steps of reacting terephthalic acid with hydrogen in the presence of a solvent and a palladium catalyst to form 1, 4-cyclohexanedicarboxylic acid, further reacting hydrogen with the reaction product liquid to form 1, 4- cyclohexanedimethanol, separating/collecting the 1, 4-cyclohexanedimethanl from the resultant reaction product liquid, and recirculatingly using the solvent as the solvent for hydrogenating a new batch of terephthalic acid; wherein the concentration of the 1, 4-cyclohexanedimethanol in the 1, 4- cyclohexanedicarboxylic acid solution formed by terephthalic acid hydrogenation is regulated at

2. 发明专利

JP2002069016A METHOD FOR HYDROGENATING TEREPHTHALIC ACID 失效
公开(公告)号：JP2002069016A
公开(公告)日：2002-03-08
申请号：JP2000260479
申请日：2000-08-30
申请人： MITSUBISHI CHEM CORP
发明人： KAYOU ATSUSHI , NANBA YOSHIAKI
IPC分类号： C07C29/149 , C07B61/00 , C07C31/27
摘要： PROBLEM TO BE SOLVED: To use a solvent by circulating in producing 1,4-cyclohexane dimethanol from terephthalic acid. SOLUTION: This method for hydrogenating terephthalic acid for generating 1,4-cyclohexane dicarboxylic acid by reacting terephthalic acid with hydrogen in the presence of a palladium catalyst in an aqueous medium, further reacting hydrogen with the reaction product liquid in the presence of a tin-ruthenium catalyst to generate 1,4-cyclohexane dimethanol, using the aqueous medium as the aqueous medium for hydrogenating terephthalic acid by circulating it after extracting and separating the 1,4-cyclohexane dimethanol from the reaction product liquid, is provided by suppressing the tin concentration in the 1,4-cyclohexane dicarboxylic acid aqueous solution produced by the hydrogenation of terephthalic acid at

3. 发明专利

JP2002054980A SUSPENSION LEVEL CONTROL METHOD 失效
公开(公告)号：JP2002054980A
公开(公告)日：2002-02-20
申请号：JP2000239253
申请日：2000-08-08
申请人： MITSUBISHI CHEM CORP
发明人： TANAKA YUTAKA , KAWAKAMI TETSUGO , NANBA YOSHIAKI
IPC分类号： G01F23/288 , B01F3/12 , B01J8/00 , B01J8/10
摘要： PROBLEM TO BE SOLVED: To provide a suspension level control method capable of highly accurately maintaining the suspension level height in a suspension tank such as a suspension reaction tank in the specific height by simple operation. SOLUTION: In this suspension level 2a control method for adjusting the height of the suspension level 2a in the suspension tank 1 for continuously extracting these members as a suspension under agitation 1a by continuously supplying solid particulates, liquid and pressurized gas, a γ ray irradiation 4 in the vertical direction to the suspension level 2a from a gaseous phase part 3 above a suspension phase part 2 in the tank 1, passes through the suspension phase part 2 is detected (5) outside the tank, and is compared with a preset value of the previously taken-in height of the suspension level 2a from the detecting γ ray quantity, a change quantity is arithmetically operated and calculated in a block 6, and the height of the suspension level 2a is adjusted by operating valve opening of an extracting valve 7 on the basis of the calculated change quantity.

4. 发明专利

JPH1045634A PRODUCTION OF LOW POLYMERIC ALPHA-OLEFIN 失效
公开(公告)号：JPH1045634A
公开(公告)日：1998-02-17
申请号：JP20853796
申请日：1996-08-07
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： B01J31/12 , C07C2/26 , C07C11/00 , C07C11/107 , C10G50/00
摘要： PROBLEM TO BE SOLVED: To enable to continuously obtain the subject compound in high yield and selectivity without generating a polymer as a by-product by feeding each component of a chromium-based compound catalyst in a specific rate to a reaction zone at the beginning of a reaction to initiate the reaction of an α- olefin. SOLUTION: In continuously reacting (B) α-olefin to polymerize into a low polymer using (A) a chromium-based catalyst consisting of a chromium compound (A1 ), a nitrogen-containing compound (A2 ) which is an amine, an amide or an imide and an alkylaluminum compound (A3 ), each component of the component A and the component B are fed to a reaction zone so that each of molar ratios A2 /A1 and A3 /A1 is made higher than the molar ratio in a stationary state to initiate the low polymerization reaction of the component B. It is preferable to feed each component of the component A and the component B to the reaction zone while keeping A1 and A3 apart not to come into contact with each other, thus, the objective compound can be obtained in high purity.

5. 发明专利

JPH09268136A PRODUCTION OF LOWER POLYMER OF ALFA-OLEFIN 失效
公开(公告)号：JPH09268136A
公开(公告)日：1997-10-14
申请号：JP1223597
申请日：1997-01-27
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： B01J31/12 , C07B61/00 , C07C2/30 , C07C2/32 , C07C11/02 , C07C11/107
摘要： PROBLEM TO BE SOLVED: To produce lower polymers of an α-olefin such as 1-hexene in high yield and selectivity while suppressing the byproduction of polymers by continuously polymerizing the α-olefin into a lower polymer using a specific catalyst. SOLUTION: In the production of lower polymers of an α-olefin, a product prepared at least from (a) a chromium compound, (b) a nitrogen-containing compound selected from an amine, an amide and an imide and (c) an alkylaluminum compound is used as a chromium-based catalyst, and the reaction is continuously carried out while keeping the molar ratio of lower polymers of the α-olefin/the α-olefin in the reaction liquid at 0.05-1.00. The chromium- based catalyst is optionally compounded further with (d) a halogen-containing compound. The ratios of the composition of the catalysts are preferably (a):(b):(c)=1:0.1-10:1-100 and (a):(b):(c):(d)=1:0.1-10:1-100:0.1-20. The lower polymerization reaction is preferably carried out with a stirrer-type flow reactor. The concentration of the α-olefin in the reaction liquid is preferably >=0.5mol/l.

6. 发明专利

JPH08301923A PRODUCTION OF LOW ALPHA-OLEFIN POLYMER 失效
公开(公告)号：JPH08301923A
公开(公告)日：1996-11-19
申请号：JP11074495
申请日：1995-05-09
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , AOSHIMA NORIYUKI , OKANO TAKESHI , NANBA YOSHIAKI
IPC分类号： C08F4/69 , C08F4/60 , C08F6/06 , C08F6/08 , C08F110/00 , C08F110/02
摘要： PURPOSE: To remove the chromium component of a chromium-base catalyst from a liquid reaction product formed in the reaction for forming a low α-olefin polymer in the presence of the catalyst. CONSTITUTION: A reaction for forming a low α-olefin polymer is performed in a solvent in the presence of a catalyst comprising either a combination essentially consisting of a chromium compound (a), a nitrogenous compound (b) selected from the group consisting of amines, amides and imides and an alkylaluminum compound (c) or a combination containing these components and a halogen compound (d). The obtained liquid reaction product containing the catalyst components is treated with a reducing agent to precipitate the chromium component from the liquid. In this way, the chromium component of the catalyst can be removed at good efficiency by a simple operation.

7. 发明专利

JPH08151409A PRODUCTION OF LOW ALPHA-OLEFIN POLYMER 失效
公开(公告)号：JPH08151409A
公开(公告)日：1996-06-11
申请号：JP29507394
申请日：1994-11-29
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： C08F4/69 , C08F4/60 , C08F10/00
摘要： PURPOSE: To provide a process for producing a low α-olefin polymer, whereby a low-polymer of an α-olefin such as 1-hexene can be produced industrially advantageously in high yields and high selectivity without using any troublesome operation, and the long-term deterioration of the catalyst can be improved. CONSTITUTION: The polymerization of an α-olefin to form its low polymer is conducted by using a chrominum catalyst comprising a combination essentially consisting of a chromium compound, an amine or a metal amide, an alkylaluminum compound and a cyclic halohydrocarbon and bringing the α-olefin and the chromium catalyst into contact with each other in a solvent in a manner that the chromium compound is prevented from previously contacting the alkylaluminum compound.

8. 发明专利

JPH08134131A PRODUCTION OF ALPHA-OLEFIN LOW POLYMER 失效
公开(公告)号：JPH08134131A
公开(公告)日：1996-05-28
申请号：JP17344995
申请日：1995-07-10
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： B01J31/12 , C07B61/00 , C07C2/30 , C07C11/02 , C08F4/60 , C08F4/69 , C08F10/00 , C10G50/00
摘要： PURPOSE: To industrially and advantageously obtain the subject low polymer in high yield and selectivity using a long-lived catalyst by bringing an α-olefin into contact with a Cr-based catalyst comprising plural kinds of compounds containing a specific compound containing a halogen. CONSTITUTION: (A) An α-olefin is fed to a reactional system and (B) a catalyst system comprising a combination of respective catalytic amounts of (BI) a Cr compound, (BII) a compound containing nitrogen which is an amine, an amide or an imide, (BIII) an alkylaluminum compound and a compound containing a halogen which is straight-chain hydrocarbons substituted with >=3 halogens such as a compound of the formula [X to X are each H or the halogen and three or more of the X to X are the halogens; (1) is 0-8] is used as a chromium-based catalyst. The components (BI) to (BIV) of the component (B) are fed to the reactional system so as not to bring the component (BI) into contact with the component (BIII) before making both the components (A) and (B) coexist and initiating the low polymerizing reaction in a reactional solvent and the component (A) is brought into contact therewith to afford the objective low polymer.

9. 发明专利

JPH09194400A PRODUCTION OF ALPHA-OLEFIN LOW POLYMER 失效
公开(公告)号：JPH09194400A
公开(公告)日：1997-07-29
申请号：JP683196
申请日：1996-01-18
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： B01J31/34 , C07B61/00 , C07C2/22 , C07C2/26 , C07C2/30 , C07C2/32 , C07C11/02 , C07C11/107
摘要： PROBLEM TO BE SOLVED: To obtain a low polymer of an α-olefin such as 1-hexene in high catalytic activity, in high yield, in high selectivity and simply by producing a low polymer of an α-olefin such as ethylene by using specific chromium-based catalyst. SOLUTION: A low polymer of (B) an α-olefin is produced by using a chromium-based catalyst comprising (A) a chromium compound (A1 ), a nitrogen- containing compound (A2 ) such as an amine, an amide or an imide, an alkyl aluminum compound (A3 ) and a halogen-containing compound (A4 ) in the molar ratio of the components A1 :A2 :A3 :A4 of 1:(0.1-10):(1-100):(0.1-20) and prepared by a process for bringing the component A1 into contact with the component A3 in a 10-50mol% solution of an α-olefin. The component A4 preferably contains an element of the group IIIA, IIIB, IVA, IVB, VA or VB of the periodic table. The component A1 is brought into contact with the component A3 in an atmosphere under 10-50kg/cm ethylene partial pressure.

10. 发明专利

JPH09143213A PRODUCTION OF ALPHA-OLEFIN OLIGOMER 失效
公开(公告)号：JPH09143213A
公开(公告)日：1997-06-03
申请号：JP30740295
申请日：1995-11-27
申请人： MITSUBISHI CHEM CORP
发明人： ARAKI YOSHITAKE , NAKAMURA HIROFUMI , IWADE SHINJI , NANBA YOSHIAKI , OKANO TAKESHI
IPC分类号： C08F4/22 , C07B61/00 , C07C2/32 , C07C11/107 , C08F4/06 , C08F4/60 , C08F4/69 , C08F10/00
摘要： PROBLEM TO BE SOLVED: To produce the subject oligomer in high yield and selectivity at a low catalyst cost in an easily distillable and purifiable state by using a specific chromium-based catalyst containing a specific halogen-containing compound in a specific contacting manner. SOLUTION: Oligomerization of an α-olefin is carried out by using a chromium-based catalyst system consisting of a combination of at least (A) a chromium compound, (B) one or more kinds of nitrogen-containing compounds selected from amines, amides and imides, (C) an alkylaluminum compound and (D) a halogen-containing compound, supplying the components A to D to the reaction system in such a manner as to present the components A to D and the α-olefin in the reaction solvent at the same time and preventing the contact of the component A with the component C before starting the oligomerizaton reaction and bringing the α-olefin into contact with the supplied components A to D. The component D is e.g. a compound of the formula [R1 and R2 are each a (substituted)1-30C alkyl having at least two halogen atoms in total as substituents on R1 and R2 ; Y is O or S].

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