| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Stabilization of vinyl compounds | US18032937 | 1937-12-17 | US2154389A | 1939-04-11 | STOESSER SYLVIA M |
| 162 | Preparation and recovery of aliphatic esters | US5432435 | 1935-12-13 | US2135450A | 1938-11-01 | LARSON ALFRED T |
| 163 | Method of distilling aliphatic esters | US55742431 | 1931-08-15 | US1859997A | 1932-05-24 | JACOB STEIN |
| 164 | Composition and method for reducing fouling in process equipment used for manufacturing aromatic materials | US22693 | 1998-02-12 | US6028211A | 2000-02-22 | Allen B. Mossman; David A. Young; Paul K. Behrens; Juergen K. Holzhauer |
| Methods for reducing the fouling of process equipment used in the manufacture of aromatic compounds such as dimethyl-2,6-naphthalenedicarboxylate are disclosed. The methods require treating manufacturing process streams with a metal complexing agent. Novel compositions useful in the manufacture of aromatic materials such as dimethyl-2,6-naphthalenedicarboxylate also are disclosed. | ||||||
| 165 | Liquid antioxidants as stabilizers | US847995 | 1997-04-21 | US6015899A | 2000-01-18 | Paul Dubs; Roger Martin; Samuel Evans |
| Products are described which can be obtained by reacting components a), b) and c), where component a) is a compound of the formula I or a mixture of compounds of the formula I, component b) is a compound of the formula II or a mixture of compounds of the formula II and component c) is a compound of the formula III or a mixture of compounds of the formula III, ##STR1## in which the general symbols are as defined in claim 1, the compound of the formula I being, for example, pentaerythritol, thiodiethylene glycol, 1,4-butanediol, 1,4-propanediol, diethylene glycol, triethylene glycol, diethanolamine or glycerol, the compound of the formula II being, for example, sunflower oil or coconut fat, and the compound of the formula III being, for example, methyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate. The abovementioned products can be used as liquid antioxidants in polymers and lubricants. | ||||||
| 166 | Inhibition of polymerization of vinylaromatic or vinylaliphatic | US946006 | 1997-10-07 | US5888356A | 1999-03-30 | Thomas Keil; Manfred Kaufhold; Bernd Helpap |
| The polymerization of a vinylaromatic or vinylaliphatic compound at elevated temperature in the absence of air is inhibited by processing the vinylaromatic or vinylaliphatic compound in the presence of 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl or 4-acetylamino-2,2,6,6-tetramethylpiperidine-N-oxylalone or in admixture with p-nitrosophenol or 2-methyl-4-nitrosophenol. | ||||||
| 167 | Polymerization inhibition of acrylates using blends of nitroxides | US876017 | 1997-06-13 | US5877344A | 1999-03-02 | Matthew E. Gande; Glen T. Cunkle; Leslie R. Gatechair; Stephen D. Pastor; Raymond Seltzer; Roland A.E. Winter |
| Ethylenically unsaturated carboxyl monomers, such as acrylic or methacrylic acid or their esters, are protected from premature polymerization during manufacture and storage in the presence or absence of water by the incorporation therein of an effective stabilizing amount of a blend two or more nitroxides. Some of these blends provide synergistic stabilization efficacy much superior to the stabilization results obtained by use of either nitroxide alone. | ||||||
| 168 | Preparation of (meth) acrylic esters | US747762 | 1996-11-13 | US5821383A | 1998-10-13 | Lukas Haussling; Ludwig Bernhard; Wolfgang Reich; Reinhold Schwalm; Erich Beck |
| A process for preparing (meth)acrylic esters by esterifying (meth)acrylic acid with monohydric or polyhydric alcohols comprises adding to the reaction mixture still comprising (meth)acrylic acid corresponding to an acid number of at least 5 mg of KOH per 1 g of reaction mixture at least one amino compound having at least one primary, secondary or tertiary amino group. | ||||||
| 169 | Liquid antioxidants as stabilizers | US466520 | 1995-06-06 | US5668206A | 1997-09-16 | Paul Dubs; Roger Martin; Samuel Evans |
| Products are described which can be obtained by reacting components a), b) and c), where component a) is a compound of the formula I or a mixture of compounds of the formula I, component b) is a compound of the formula II or a mixture of compounds of the formula II and component c) is a compound of the formula III or a mixture of compounds of the formula III, ##STR1## in which the general symbols are as defined in claim 1, the compound of the formula I being, for example, pentaerythritol, thiodiethylene glycol, 1,4-butanediol, 1,4-propanediol, diethylene glycol, triethylene glycol, diethanolamine or glycerol, the compound of the formula II being, for example, sunflower oil or coconut fat, and the compound of the formula III being, for example, methyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate. The abovementioned products can be used as liquid antioxidants in polymers and lubricants. | ||||||
| 170 | Liquid antioxidants as stabilizers | US41664 | 1993-04-01 | US5478875A | 1995-12-26 | Paul Dubs; Roger Martin; Samuel Evans |
| Products are described which can be obtained by reacting components a), b) and c), where component a) is a compound of the formula I or a mixture of compounds of the formula I, component b) is a compound of the formula II or a mixture of compounds of the formula II and component c) is a compound of the formula III or a mixture of compounds of the formula III, ##STR1## in which the general symbols are as defined in claim 1, the compound of the formula I being, for example, pentaerythritol, thiodiethylene glycol, 1,4-butanediol, 1,4-propanediol, diethylene glycol, triethylene glycol, diethanolamine or glycerol, the compound of the formula II being, for example, sunflower oil or coconut fat, and the compound of the formula III being, for example, methyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate. The abovementioned products can be used as liquid antioxidants in polymers and lubricants. | ||||||
| 171 | Reducing decomposition of acetates | US096395 | 1993-07-26 | US5395961A | 1995-03-07 | J. Steven Qi; Garra C. Lester |
| Disclosed is a method of reducing the decomposition of liquid acetates and increasing their storage life. A soluble amine having a pH in water between 9 and 12 is added to the acetate. Also disclosed is a composition of about 1 to about 50 ppm of the amine in the acetate. | ||||||
| 172 | Process for recovering dimethyl terephthalate and ethylene glycol | US11411 | 1993-01-29 | US5304673A | 1994-04-19 | Paul M. Hermanson |
| A process for recovering dimethyl terephthalate and ethylene glycol from a stream including aqueous ethylene glycol is described. Adding a dispersing agent to the stream renders it filterable, and a subsequent cooling of the stream containing the dispersing agent causes dimethyl terephthalate to precipitate in a form which can be removed by conventional filtration. The precipitated dimethyl terephthalate is of a quality and purity suitable for use in the manufacture of polyethylene terephthalate. A commercially valuable ethylene glycol stream is also recovered by the process. | ||||||
| 173 | Process for stabilizing ethylenically unsaturated compounds and stabilized monomer compositions | US956437 | 1992-10-02 | US5290888A | 1994-03-01 | Leslie R. Gatechair; James L. Hyun; Peter J. Schirmann |
| A process for stabilizing an ethylenically unsaturated monomer or oligomer from premature polymerization is disclosed whereby a stabilizing amount of an N-hydroxy substituted hindered amine is added to said polymerizable monomer or oligomer. The ethylenically unsaturated monomer or oligomer encompass vinyl monomers or oligomers bearing at least one polymerizable moiety. The N-hydroxy substituted hindered amine inhibits premature polymerization in the liquid and/or vapor phase. | ||||||
| 174 | Stabilized naphthalenedicarboxylic acid diesters | US924305 | 1992-08-03 | US5194572A | 1993-03-16 | Allen B. Mossman |
| A method of preparing polyester materials comprising polymerizing a mixture comprising a diol and a stabilized diester of a naphthalenedicarboxylic acid. | ||||||
| 175 | Dispersant for vinyl acetate unit fouling | US191641 | 1988-05-09 | US4902824A | 1990-02-20 | Allen R. Syrinek |
| A dispersant for vinyl acetate process streams has been found, which dispersant acts as an antifoulant, preventing formation of fouling tars, polymers, debris, and the like, in the process streams involved in the manufacture of vinyl acetate monomer. The antifoulant/dispersant is primarily composed of hydrocarbonaceous sulfonic acids which may optionally be admixed organic polar solvents and tall oil fatty acids. | ||||||
| 176 | Stabilized ethylenically unsaturated organic compositions | US510870 | 1983-07-05 | US4542231A | 1985-09-17 | Edward F. Dougherty; Mark O. Scates |
| New and improved compositions are described of ethylenically unsaturated organic compounds capable of addition polymerization stabilized from unintentional or premature polymerization in the liquid phase by the addition of the combination cerium compounds which are soluble in the ethylenically unsaturated organic compounds and phenolic type inhibitors. | ||||||
| 177 | Stabilization with alkali metal acetate material of certain thermally unstable DMT | US663171 | 1976-03-02 | US4103090A | 1978-07-25 | Horace Edward Hood |
| Disclosed is the stabilization of thermally unstable, fresh dimethyl terephthalate of at least 99.8 weight % purity, free of alkali metal compound material, and produced by the cooxidation-esterification process. Stabilization is effected by incorporating therein a stabilizing quantity of alkali metal acetate material having no significant concentration of either phosphonic acid moiety or phosphite moiety. | ||||||
| 178 | Stabilized acrylic acid esters of polyhydric alcohols and a process for their preparation | US695533 | 1976-06-14 | US4053504A | 1977-10-11 | Hans Jurgen Rosenkranz; Hans Rudolph; Gerhard Apel |
| Stabilized acrylic acid esters of polyhydric alcohols which contain as stabilizers polymerisation inhibitors including small amounts of compounds of the styrene type show a non-reduced polymerisation reactivity. | ||||||
| 179 | N-(nitroalkyl)-N'-phenyl-p-phenylenediamines | US569119 | 1975-04-17 | US4017544A | 1977-04-12 | Darrell Dexter Mullins |
| A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a N-(nitroalkyl)phenylenediamine of the formula ##STR1## in which R is lower alkyl, R' is hydrogen, nitro or lower alkyl and X is hydrogen, lower alkyl or lower alkoxy. | ||||||
| 180 | Stabilization of unsaturated carboxylic acid esters with mixtures of polyalkylene-amines and arylenediamines | US646280 | 1976-01-02 | US4016198A | 1977-04-05 | Gene R. Wilder |
| A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a combination comprising polyalkyleneamine and arylenediamine of the formula ##STR1## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy or phenoxy, R is hydrogen or alkyl, and R.sub.1 is alkyl or phenyl or R and R.sub.1 together with the nitrogen atom is a heterocycle selected from the group consisting of pyrrolidinyl, 2,5-dimethyl pyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl. | ||||||
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