837-08-1Relevant articles and documents
Template-free synthesis of porous carbonaceous solid acids with controllable acid sites and their excellent activity for catalyzing the synthesis of biofuels and fine chemicals
Liu, Fujian,Li, Bojie,Liu, Chen,Kong, Weiping,Yi, Xianfeng,Zheng, Anmin,Qi, Chenze
, p. 2995 - 3007 (2016/05/24)
N rich porous carbon based solid acids (NPC-[CxN][X]) have been successfully synthesized by treatment of N rich porous carbon (NPC) with various quaternary ammoniation reagents such as iodomethane, 1,3-propane sultone, and 1,4-butanesultone, and ion exchange with various strong acids such as HSO3CF3, H2SO4, H3PW12O40, HBF4etc. The NPC support was synthesized by carbonization of KOH-activated polypyrrole without using additional templates. Various characterizations showed that NPC-[CxN][X] possesses abundant nanopores, large Brunauer-Emmett-Teller surface areas, good stability, and strong and controllable acid sites with Br?nsted characteristics. The immobilized acidic groups were homogeneously dispersed into NPC-[CxN][X]. Notably, NPC-[CxN][X] acted as efficient, reusable and generalized solid acids, which showed excellent activity in various acid-catalyzed reactions such as esterification and transesterification in the synthesis of biodiesel, dehydration of fructose into 5-hydroxymethylfurfural, depolymerization of crystalline cellulose into sugars, and condensation of phenol with acetone in the synthesis of bisphenol A, much higher than that of various solid acids such as Amberlyst 15, H-ZSM-5, H-USY, and sulfonic group functionalized ordered mesoporous silicas. The preparation of NPC-[CxN][X] leads to the development of porous carbon based solid acids with controllable structural characteristics and excellent catalytic activity.
METHOD FOR PRODUCING BISPHENOL COMPOUND
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Paragraph 0120; 0121; 0130; 0131; 0137, (2016/11/14)
Phenol compound and a carbonyl compound with strong cation exchange and 2-(2-mercaptoacetyl cop toe ethyl) pyridine in the presence of manufacturing method as bisphenol compounds, said phenol compound and a carbonyl compound causes the concentration of water in reaction material including 0.05 to 0.5 weight % provided that the manufacturing method characterized by bisphenol compounds.
Oligomeric hydroxy-aryloxy phosphazene based on cyclic chlorophosphazenes
Sirotin,Bilichenko,Brigadnov,Kireev,Suraeva,Borisov
, p. 1903 - 1912 (2014/05/06)
Reaction of hexachlorocyclotriphosphazene and a mixture of cyclic chlorophosphazene [NPCl2]n =3-8 with an excess of diphenylolpropane under different conditions affords corresponding oligomeric hydroxy-aryloxy phosphazenes, which were characterized by gas chromatography-mass spectrometry, laser mass spectrometry, 31P and 1H NMR spectroscopy. Side reactions was found with participation of decomposition products of diphenylolpropane. Pleiades Publishing, Ltd., 2013.
Self-assembly synthesis of a high-content sulfonic acid group functionalized ordered mesoporous polymer-based solid as a stable and highly active acid catalyst
Wang, Wei,Zhuang, Xin,Zhao, Qingfei,Wan, Ying
body text, p. 15874 - 15886 (2012/09/05)
A stable and highly active ordered mesoporous polymer-based acid catalyst has been prepared via a simple surfactant templating approach and oxidation treatment. The composition and nanostructure are characterized by XRD, NMR, XPS, TEM, nitrogen sorption, elemental and chemical analysis. The sulfonic acid groups have been anchored within the well-arranged channels of the polymer-based matrix. Even with a high -SO3H group loading (up to about 27.4 wt%) on the mesoporous polymer-based material, the ordered mesostructure and high surface area (～400 m2 g-1) can be retained and the functional moieties are highly chemically accessible. With the large number of acid sites (0.93-2.38 H+ mmol g-1 determined by acid-base titration) and the hydrophobic character, the mesoporous polymer-based solid exhibits unique catalytic performance in acid-catalyzed reactions such as condensation and acetalization, not only high activity (per site yield of bisphenol-A is over 45 in the condensation of phenol and acetone) but also excellent stability. Loss in acidic loading and activity is negligible even after the catalyst is reused 20 times in the acetalization of butanediol and aldehyde. The stability is most likely attributed to the hydrophobic nature of the mesoporous polymer-based solids, which favors the diffusion of water and thereby inhibits the poisoning of acidic sites caused by water generating in the reaction. Moreover, with large mesopores, the diffusion of reactants and products can be promoted and hence the catalytic activity can be further increased.
PROCESS FOR PRODUCING BISPHENOL-A
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Page/Page column 4, (2010/02/17)
A process for preparing 2,2-bis(4-hydroxyphenyl)propane (p,p-bisphenol-A) from 2,4,4-trimethyl-2-(4-hydroxyphenyl)chroman (chroman 1.5) is disclosed. Phenol and chroman 1.5 are contacted over an acidic ion exchange resin at a given temperature for a given period of time. The process results in improved quality of p,p-bisphenol-A, better performance of catalyst, improved raw material usage, and reduced waste.
PROCESS FOR THE MANUFACTURE OF POLYPHENOLS
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Page/Page column 7, (2009/06/27)
An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.
PROCESS FOR PRODUCING BISPHENOL A
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Page/Page column 7, (2008/12/04)
Upon isomerizing bis(hydroxyphenyl) propanes other than bisphenol A (2,2-bis(4-hydroxyphenyl) propane) into bisphenol A by contacting a liquid containing bis(hydroxyphenyl) propanes to a strongly acidic cation-exchange resin, the water concentration of the liquid containing bis(hydroxyphenyl) propanes is regulated at 0.2 to 0.9% by mass. Thereby, the operating life of the isomerization catalyst used in the method for producing bisphenol A including an isomerization step can be extended, and bisphenol A can be produced efficiently. In addition, the amount of the catalyst disposed can be reduced.
PROCESS FOR PRODUCING BISPHENOL A
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Page/Page column 8-11, (2008/12/08)
The invention relates to producing bisplienol A from phenol and acetone by way of catalytic condensation in the presence of promoted, sulfonated ion- exchange resins, with using fractional crystallization to isolate the p,p'-BPA isomer. The condensation reaction of acetone and phenol is carried out in a multi? stage reaction system with the interstage control of reaction temperature and acetone concentration as well as with the control of water concentration before the last stage of the reaction system. A part of post-crystallization liquors from solvent crystallizations is recycled to the last reactor. Water and acetone are evaporated from the post-reaction mixture which, subsequently, is mixed with the effluent solution from fractional crystallization dissolved in the isomerizate obtained in the process of isomerization of a part of the stream of concentrated liquors after solvent crystallization, the resulting stream is subjected to solvent crystallization, the isolated bisphenol A/phenol adduct is subjected to thermal decomposition, and the resulting raw bisphenol A is subjected to fractional crystallization.
PROCESS FOR PRODUCING BISPHENOL A
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Page/Page column 8-10, (2009/01/20)
The present invention provides a process for producing bisphenol A using a horizontal belt filter equipped with a filter cloth having a long operating life and a capability of exerting stable filtration performance. The horizontal belt filter is used for solid/liquid separation of slurry prepared by reacting phenol and acetone in the presence of an acid catalyst and then crystallizing an adduct of bisphenol A and phenol from the resulting phenol solution of bisphenol A. The filter cloth is woven out of yarns having uniform diameters and has an air permeability of 50 to 100 ml/cm2 sec.
Method for Stabilizing a Cation Exchange Resin Prior to Use as an Acid Catalyst and Use of Said Stabilized Cation Exchange Resin in a Chemical Process
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Page/Page column 7-8, (2009/01/24)
A method for preventing the degradation of a catalyst during storage of the catalyst and prior to using the catalyst in a chemical process comprising treating the catalyst with an antioxidant and storing the treated catalyst until further use. The stabilized treated catalyst may be used in a process for producing organic chemicals such as in a process for producing bisphenol A.
