公开(公告)号：US4284793A

公开(公告)日：1981-08-18

申请号：US133863

申请日：1980-03-25

申请人： Fumio Sagara ,  Hiroshi Kawabata ,  Kiyonori Shiiba

发明人： Fumio Sagara ,  Hiroshi Kawabata ,  Kiyonori Shiiba

IPC分类号： C07C67/48 ,  C07C69/34 ,  C07C69/76 ,  C07C67/08

CPC分类号： C07C67/60

摘要： A method for producing plasticizers which contain titanium in only a very small amount is provided. According to this method, the amount of waste water is very small. This method comprises reacting phthalic anhydride with an alcohol having 4-18 carbon atoms in the presence of, as a catalyst, a tetraalkyl titanate or a polymer thereof, and has a feature in the treatment of the resultant ester with a solid alkali and adsorbing agent(s) in the absence of water.

摘要翻译： 提供了一种生产仅含有极少量的钛的增塑剂的方法。 根据这种方法，废水量很小。 该方法包括在作为催化剂的钛酸四烷基酯或其聚合物的存在下使邻苯二甲酸酐与具有4-18个碳原子的醇反应，并且具有用固体碱和吸附剂处理所得酯的特征 在没有水的情况下。

公开(公告)号：US4268362A

公开(公告)日：1981-05-19

申请号：US754911

申请日：1976-12-28

申请人： Tetsuya Ogawa ,  Norio Yoshizaki ,  Tadakatsu Katsuragi ,  Makoto Nakamura ,  Kiyonori Shiiba

发明人： Tetsuya Ogawa ,  Norio Yoshizaki ,  Tadakatsu Katsuragi ,  Makoto Nakamura ,  Kiyonori Shiiba

IPC分类号： C07C51/00 ,  C07C51/44 ,  C07C53/08 ,  C07C67/00 ,  B01D3/00

CPC分类号： C07C51/44 ,  Y10S203/20

摘要： A method for purifying raw acetic acid containing formaldehyde is provided wherein raw acetic acid is heat-treated at a temperature of about its boiling point or higher, in advance of the conventional distillation for removing a lower boiling fraction, and the acetic acid thus heat-treated is distilled to remove the lower boiling fraction, whereby the content of formaldehyde can be reduced down to 30 ppm or lower.

摘要翻译： 提供了一种用于纯化含有甲醛的甲醛的方法，其中在常规蒸馏除去较低沸点馏分之前，在大约沸点或更高的温度下对生乙酸进行热处理， 蒸馏处理以除去低沸点馏分，由此甲醛的含量可以降低至30ppm或更低。

公开(公告)号：US5063945A

公开(公告)日：1991-11-12

申请号：US500574

申请日：1990-03-28

申请人： Taizo Sugihara ,  Hiromu Sonoda ,  Kiyonori Shiiba

发明人： Taizo Sugihara ,  Hiromu Sonoda ,  Kiyonori Shiiba

IPC分类号： A24D3/02 ,  A24D3/08 ,  D04H3/007 ,  D04H3/077

CPC分类号： A24D3/08 ,  Y10T428/2924 ,  Y10T428/2967 ,  Y10T428/2978

摘要： A tobacco filter stock capable of being molded into a filter only be entanglement of filaments with one another without any adhesion means, whereby the resulting filter has a suitable hardness and a superior whiteness. A tobacco filter and a production process thereof are provided, whereby the tobacco filter stock comprises a ton of crystalline polyolefin filaments, preferably crystalline polypropylene filaments, having a single filament denier of 1 to 6 d/f, a total denier of 30,000 to 60,000 D 40 to 60 crimps/25 mm filament, a crimp elastic modulus of 2.5 to 5.0, a frictional coefficient between filaments of 0.20 to 0.37 and a height ratio (height/width) of 0.01 to 0.1.