Patents Assigned to China Petrochemical Development Corporation
-
Publication number: 20110144328Abstract: The present invention provides a method for preparing large particles of titanium-silicalite molecular sieves. The method of the present invention includes the steps of preparing a dispersion solution of a primary crystalline molecular sieve; forming an aggregated particle solution by adding a flocculating agent and a coagulating agent into the dispersion solution; mixing the aggregated particle solution with a synthesis gel to form a mixture; and heat-treating the mixture. The average diameter of the titanium-silicalite molecular sieves in the present invention is more than 5 ?m. In the preparation of cyclohexanone oxime using the molecular sieve of the present invention as the catalyst, the selectivity and conversion rate of cyclohexanone oxime are high, the usage of hydrogen peroxide is enhanced, and the catalyst is easy to be recovered.Type: ApplicationFiled: March 29, 2010Publication date: June 16, 2011Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Pin-To Yao, Cheng-Fa Hsieh, Shih-Yao Chao, Yang-Min Liang
-
Publication number: 20110105793Abstract: The present invention provides a method for separating an amide from an amino acid ionic liquid. The method includes the step of providing a polar solvent and an extracting agent to the amino acid ionic liquid, so as to separate the amide from the amino acid ionic liquid. In the method of the present invention, there is no need to add ammonium for neutralization, such that no byproduct, ammonium sulfate, is formed. In addition, after the amide is separated from the amino acid ionic liquid, the amino acid ionic liquid can be recycled.Type: ApplicationFiled: December 14, 2009Publication date: May 5, 2011Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Cheng-Fa Hsieh, Chien-Chuan Shih, Chi-Yuan Chen
-
Publication number: 20110077429Abstract: The present invention provides a catalyst composition for preparing an amide, including an amino acid ionic liquid having a cation of formula (I) and an anion selected from the group consisting of an inorganic acid group, an organic acid group and a combination thereof, wherein the numbers of the anion and the cation are such that the amino acid ionic liquid is electroneutral; and a Bronsted acid. The present invention also provides a method for preparing an amide in the presence of the catalyst composition, and the method has advantages such as decreasing viscosity of ionic liquid, and increasing conversion rate of ketoximes and selectivity of amides.Type: ApplicationFiled: November 30, 2009Publication date: March 31, 2011Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Tung-Han Tsai, Cheng-Fa Hsieh, Chi-Yuan Chen
-
Patent number: 7897818Abstract: A method of oxidizing hydrocarbons in liquid phase is provided. According to this method, a liquid-phase oxidation reaction of hydrocarbons is carried out by using an organic compound capable of chelating metals as auxiliary agent, represented by formula (II), in the presence of an oxygen-containing gas and a transition metal catalyst. Accordingly, the conversion degree of the hydrocarbon is increased, and the overall yields of products are improved while the selectivity of catalytic oxidation reaction is still high.Type: GrantFiled: July 7, 2009Date of Patent: March 1, 2011Assignee: China Petrochemical Development CorporationInventors: Jui-Tsung Hung, Chin-Yi Lee, Chia-Jung Tsai
-
Patent number: 7892512Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.Type: GrantFiled: April 5, 2007Date of Patent: February 22, 2011Assignee: China Petrochemical Development CorporationInventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
-
Patent number: 7888525Abstract: A method for preparing organic carbonates comprising subjecting an alcohol compound to oxidative carbonylation in the presence of carbon monoxide, oxygen and a liquid-phase catalytic system, to form a organic carbonates, wherein the liquid-phase catalytic system includes at least one catalyst, at least one additive and at least one ionic liquid composed of a cation, which has a nitrogen-containing heterocyclic structure, and an anion. Through using the additive and the ionic liquid, the activity and the performance of the catalyst are enhanced, and increased reaction rate and yield can be obtained.Type: GrantFiled: March 25, 2008Date of Patent: February 15, 2011Assignee: China Petrochemical Development CorporationInventors: Min-Sheng Chen, Chia-Jung Tsai, Chih-Wei Chang
-
Patent number: 7795473Abstract: A system and a method for preparing cycloalkanone are provided. The method includes the steps of: (a) oxidizing cycloalkane to form a mixture containing ketone, alcohol and unreacted cycloalkane; (b) adding to the mixture alkali metal hydroxide or alkali metal carbonate to form a first mixed solution; (c) separating the first mixed solution into a first organic phase solution and a first aqueous phase solution; and (d) extracting the first organic phase solution by water to obtain a second organic phase solution and a second aqueous phase solution; and (e) distilling the second organic phase to separate out cycloalkanone. The method performs phase separation after a mixing step, and then performs water extraction, thereby effectively lowering the contents of the metal salts in the organic phases. Compared with acid-water extraction, the method not only provides better cooling effects but also reduces equipment corrosion, and therefore has the advantage of decreasing the need for sewage treatments.Type: GrantFiled: April 16, 2009Date of Patent: September 14, 2010Assignee: China Petrochemical Development CorporationInventors: Yau-Ching Tsai, Chih-Chung Chou, Chin-Hisang Lin
-
Patent number: 7785549Abstract: A recycling system for hydroxylamine formation and oximation is proposed. The recycling system includes a hydroxylamine formation zone, an oximation zone, a purification zone, and an adjusting zone having a nitrate absorption tower. An inorganic process solution, used by the recycling system, partially enters the nitrate absorption tower supplementing nitrate, followed by mixing with the residual inorganic process solution, thereby reducing the loss rate of hydroxylamine in the inorganic process solution due to degradation. In addition, the organic impurities with high boiling point in the inorganic process solution can be effectively removed in the purification zone. As a result, the reduced activity or selectivity of the catalyst for hydroxylamine formation, caused by the toxic effects of these organic impurities on the catalyst, can be avoided, and hence, a high concentration of hydroxylamine can be obtained.Type: GrantFiled: September 11, 2007Date of Patent: August 31, 2010Assignee: China Petrochemical Development CorporationInventors: Jih-Dar Hwang, Hsiu-Li Cheng, Shou-Li Luo
-
Publication number: 20100160669Abstract: The present invention relates to a process for producing organic carboxylic acid esters, in which an amino-ester exchange reaction of an organic carboxylic acid amide with an ester compound, or with an alcohol compound under a CO pressure, is carried out at a specific temperature in the presence of a catalyst and a promoter, so as to produce an organic carboxylic acid ester.Type: ApplicationFiled: February 17, 2009Publication date: June 24, 2010Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Yu Chiao Liu, Chin Yi Lee, Chia Jung Tsai
-
Patent number: 7700785Abstract: Provided is a process for preparation of dialkyl carbonates, comprising the step of performing oxidative carbonylation of an alcohol in liquid phase in the presence of CO and O2, to form dialkyl carbonate in a catalyst system comprising a metal halide as catalyst and at least one nitrogen-containing compound selected from the group consisting of imidazole derivatives (excluding unsubstituted imidazole), benzoimidazole derivatives, pyridazine derivatives, carbazole, acridine and non-cyclic amines as auxiliary catalyst. The process of the invention, by using above catalyst system, can increase the conversion ratio of alcohol and the selectivity of the oxidative carbonylation reaction, thus increasing the total yield of dialkyl carbonate. In addition, the process of the invention has the advantages of reducing the required amount of the catalyst and causing less corrosion to the reactor.Type: GrantFiled: January 15, 2008Date of Patent: April 20, 2010Assignee: China Petrochemical Development CorporationInventors: Chih-Wei Chang, Chia-Jung Tsai, Ying-Tien Chen
-
Patent number: 7700767Abstract: A system for purifying an aqueous solution of crude caprolactam is provided, which includes a filtration zone (A), an inspection unit (B), a purification zone (C), and a first temporary storage tank (D). The filtration zone (A) contains a filtration apparatus though which an aqueous solution of crude caprolactam is filtered to remove ionic impurities therein, so as to obtain caprolactam-containing filtrate; the inspection unit (B) is used for judging the filtrate from the filtration zone (A) meets the preset inspection standards; the purification zone (C) is used for concentrating and further purifying filtrate meeting the preset inspection standards, thereby forming a final caprolactam product; and the first temporary storage tank (D) is used for receiving the filtrate not meeting the preset inspection standards, which is then mixed with the aqueous solution of crude caprolactam and delivered back to the filtration zone (A).Type: GrantFiled: August 31, 2007Date of Patent: April 20, 2010Assignee: China Petrochemical Development CorporationInventors: Chien-Hsien Li, Shou-Li Luo
-
Publication number: 20100063274Abstract: The present invention provides a method for preparing amides, in which an amino acid ionic liquid is used as both a reaction medium and a catalyst to catalyze Beckman rearrangement of a ketoxime, so as to produce an amide. In the method, the rearrangement is conducted by catalyzing a ketoxime with an amino acid ionic liquid having the asymmetric property at a moderate reaction temperature during a short reaction time, so as to produce an amide without adding other catalysts such as concentrate sulfuric acid. The method has advantages such as avoiding corrosion in equipments with pipelines, the high conversion rate of ketoximes and the high selectivity of amides.Type: ApplicationFiled: July 13, 2009Publication date: March 11, 2010Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATION, Taipei(Taiwan)Inventors: Tung-Han Tsai, Pin-To Yao, Cheng-Fa Hsieh
-
Patent number: 7671236Abstract: Provided is a process of producing cyclohexanone oxime comprising the steps of: pre-mixing an inorganic process solution containing a high concentration of hydroxylamine phosphate with a first stream of cyclohexanone such that the concentration of hydroxylamine phosphate is reduced to 80% or less of its initial concentration; and subjecting hydroxylamine phosphate in the premixed inorganic process solution to an oximation reaction with a second stream of cyclohexanone. According to the process, oximation is performed after the inorganic process solution containing a high concentration of hydroxylamine phosphate has been pre-mixed with the first stream of cyclohexanone to reduce the concentration of hydroxylamine phosphate. As a result, not only that the efficiency of oximation and the yield of cyclohexanone oxime are increased, but also the organic content of the inorganic process solution discharged from the oximation tower is reduced.Type: GrantFiled: November 20, 2007Date of Patent: March 2, 2010Assignee: China Petrochemical Development CorporationInventors: Jih-Dar Hwang, Kai-Hung Haung, Hsiu-Li Cheng, Shou-Li Luo
-
Patent number: 7671233Abstract: A process for preparing a carboxylic acid by the carbonylation of an alcohol in a reaction medium is provided. The reaction medium includes a catalyst promoter having a metal species selected form the group consisting of group IIIA-IVA metals, group IB-VIIIB metals and lanthanides, together with a hydrohalic acid to prevent catalyst precipitation and to maintain high reaction rates in case of low water content.Type: GrantFiled: September 20, 2007Date of Patent: March 2, 2010Assignee: China Petrochemical Development CorporationInventors: Chi-He Chen, Chin-Yi Lee, Chia-Jung Tsai
-
Publication number: 20100036172Abstract: A method of oxidizing hydrocarbons in liquid phase is provided. According to this method, a liquid-phase oxidation reaction of hydrocarbons is carried out by using an organic compound capable of chelating metals as auxiliary agent, represented by formula (II), in the presence of an oxygen-containing gas and a transition metal catalyst. Accordingly, the conversion degree of the hydrocarbon is increased, and the overall yields of products are improved while the selectivity of catalytic oxidation reaction is still high.Type: ApplicationFiled: July 7, 2009Publication date: February 11, 2010Applicant: China Petrochemical Development CorporationInventors: Jui-Tsung HUNG, Chin-Yi LEE, Chia-Jung TSAI
-
Publication number: 20100029974Abstract: A catalytic system for an oxidative carbonylation reaction is provided, which includes a metal organohalogen catalyst, at least one organic nitrogen-containing heterocyclic adjuvant, and an inorganic co-catalyst, wherein the inorganic co-catalyst is selected from carboxylates, nitrates, halides, oxides, and complexes of lead, lanthanum, titanium, tungsten, and dysprosium. The process for producing a dialkyl carbonate by performing a liquid-phase oxidative carbonylation reaction of an alcohol in the presence of the catalytic system is significantly improved, and the conversion and selectivity of the catalytic reaction are increased.Type: ApplicationFiled: December 4, 2008Publication date: February 4, 2010Applicant: China Petrochemical Development CorporationInventors: Chih-Wei Chang, Chia-Jung Tsai, Ying-Tien Chen
-
Publication number: 20090324480Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.Type: ApplicationFiled: July 8, 2009Publication date: December 31, 2009Applicant: China Petrochemical Development CorporationInventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
-
Publication number: 20090312542Abstract: A system and a method for recovering caprolactam from a rearrangement mixture are provided. The system includes a neutralization unit; a buffering unit for receiving a crude lactam solution containing impurities content below a standard value and being fed from the neutralization unit; a temporary storage unit for receiving a crude lactam solution containing impurities above the standard value and being fed from the neutralization unit; a temporary extraction unit for performing batch extraction to separate out a first lactam solution; an extraction unit for performing continuous extraction to separate out a second lactam solution; and a recovery unit for allowing caprolactam to be recovered.Type: ApplicationFiled: May 29, 2009Publication date: December 17, 2009Applicant: China Petrochemical Development CorporationInventor: Chien-Hsien LI
-
Patent number: 7622420Abstract: This invention provides a catalyst composition for preparing hydroxylamine, which comprises palladium, a platinum compound, a germanium compound and a carrier, wherein a halogen concentration of the composition is no more than 10 ppm. The catalyst composition is prevented from poisoning by halogens, and therefore the catalyst composition has high selectivity and catalytic activity. Further, the weight ratio of palladium and platinum in the catalyst composition ranges from 100:1 to 1000:1, such that the catalyst composition can be used to solve the commonly observed problem, i.e., decreased selectivity due to the excessive amount of platinum.Type: GrantFiled: May 27, 2009Date of Patent: November 24, 2009Assignee: China Petrochemical Development CorporationInventors: Pin-To Yao, Chun-Kao Wang, Cheng-Fa Hsieh
-
Publication number: 20090264682Abstract: A system and a method for preparing cycloalkanone are provided. The method includes the steps of: (a) oxidizing cycloalkane to form a mixture containing ketone, alcohol and unreacted cycloalkane; (b) adding to the mixture alkali metal hydroxide or alkali metal carbonate to form a first mixed solution; (c) separating the first mixed solution into a first organic phase solution and a first aqueous phase solution; and (d) extracting the first organic phase solution by water to obtain a second organic phase solution and a second aqueous phase solution; and (e) distilling the second organic phase to separate out cycloalkanone. The method performs phase separation after a mixing step, and then performs water extraction, thereby effectively lowering the contents of the metal salts in the organic phases. Compared with acid-water extraction, the method not only provides better cooling effects but also reduces equipment corrosion, and therefore has the advantage of decreasing the need for sewage treatments.Type: ApplicationFiled: April 16, 2009Publication date: October 22, 2009Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Yau-Ching Tsai, Chih-Chung Chou, Chin-Hisang Lin