摘要:
Processes for producing polyester amides, by reacting a polyisobutylene with a first reagent selected from the group consisting of at least monounsaturated acids having from 3 to 21 carbon atoms and derivatives thereof; and a second reagent selected from the group consisting of monoethanolamine and alkylamines of the general formula R—NH2, wherein R represents an alkyl group having from 1 to 4 carbon atoms; are described. The polyester amides thus produced and their uses in stabilizing asphaltenes in crude oil and crude oil derivatives are also described.
摘要:
The invention concerns the use of mixed hydroxydes of bivalent and trivalent metals with a three-dimensional spaced-lattice structure of the garnet type to control the thixotropic thickening of aqueous preparations, using swellable clays and/or other swellable layer-silicate compounds of natural and/or synthetic origin as visosity-increasing agents. The preferred garnet-type mixed hydroxydes are catoites of the basic structure Ca.sub.3 Al.sub.2 (OH).sub.12 a minor proportion of whose OH units can be exchanged for acid groups, in particular silicate groups.
摘要:
Methods and compositions for dissolving adherent petroleum residues which occur in the production and processing of petroleum in which esters of the following formula are employed: R1—COO—(CnH2nO)x—R2 (I) which R1 is an alkyl group containing 6 to 22 carbon atoms or a (CH2)m—COOR4 group, R2 and R4 independently of one another represent an alkyl group containing 1 to 8 carbon atoms, n is the number 2 or 3 and m is a number of 1 to 6 and x is 0 or a number of 1 to 12.
摘要:
A process for breaking an emulsion into a water phase and an oil phase involving: (a) providing an emulsion containing an oil phase and a water phase; (b) providing an alkoxylated C10-24 carboxylic acid ester derived by the addition of ethylene oxide and/or propylene oxide onto a ring opened epoxidized C10-24 carboxylic acid triglyceride which is ring opened with a C6-18 carboxylic acid; and (c) contacting the emulsion with a demulsifying effective amount of the alkoxylated C10-24 carboxylic acid ester. Said process has application on crude oil emulsions.
摘要:
A process useful for protecting metal surfaces against corrosion in is presented involving: (a) forming a corrosion inhibitor having a compound corresponding to formula (I): where R1, R2 and R3 independently of one another represent an alkyl or hydroxyalkyl group containing 1 to 4 carbon atoms, an aryl or alkylaryl group or a group corresponding to formula (II): A− is an anion, n is the number 2 or 3, p is a number of 1 to 3 and R5 is an alkyl or alkenyl group containing 7 to 23 carbon atoms and 0, 1, 2 or 3 double bonds, and R4 is a group corresponding to formula (II) or (III): where R1, R2 and R3 are as defined above and Z is a group —(CH2)m— or a group corresponding to formula (IV): m is an integer of 1 to 6, X is a group NH or an oxygen atom and D is a dimer fatty acid residue containing on average 36 to 54 carbon atoms; (b) combining the corrosion inhibitor with liquid aqueous, liquid non-aqueous or gaseous media; and (c) contacting the corrosion inhibitor with metal. The corrosion inhibitor used in the is biodegradable and shows low aquatic toxicity.
摘要:
Processes for the production of polymers by emulsion polymerization of olefinically unsaturated monomers, in which olefinically unsaturated esters corresponding to formula (I): HOOC—CH═CH—COO—(BO)z(PO)y(EO)xR1 (I) in which R1 is an alkyl group or alkenylphenol group containing 8 to 24 carbon atoms, BO is a butylene oxide unit, PO is a propylene oxide unit and EO is an ethylene oxide unit and the indices x, y and z independently of one another stand for 0 or for numbers of 1 to 50, with the proviso that at least one of the indices x, y and z is not 0, the carboxyl group of the compounds (I) being completely or partly present in neutralized form and the C═C double bond being cis- or trans-configured; are used as copolymerizable emulsifiers.
摘要翻译:通过烯属不饱和单体的乳液聚合生产聚合物的方法,其中对应于式(I)的烯属不饱和酯:HOOC-CH = CH-COO-(BO)z(PO)y(EO)xR1(I) 其中R1是含有8-24个碳原子的烷基或链烯基酚基,BO是环氧丁烷单元,PO是环氧丙烷单元,EO是环氧乙烷单元,并且指数x,y和z彼此独立地代表 0或1至50的数字,条件是指数x,y和z中的至少一个不为0,化合物(I)的羧基完全或部分以中和形式存在,C = C 双键是顺式或反式配置的; 用作可共聚的乳化剂。
摘要:
The invention relates to sodium silicates with a modulus (molar ratio of SiO.sub.2 to Na.sub.2 O) of 1.3 to 4 in the form of a fine-particle solid in shard-like form or compounds containing these silicates with the ability to reduce incrustation when used as a builder component in detergents. These useful materials are distinguished in particular by the fact that they are in the form of an X-ray amorphous overdried material (primary drying product) with water contents below 15% by weight and apparent densities of the non-compacted solid granules of 500 g/l or lower which has been produced by drying of a water-containing sodium silicate preparation using a hot gas phase as the drying medium and/or by heating of a spray-dried sodium silicate with water contents of at least 15% by weight at temperatures of 120.degree.to 450.degree. C., if necessary accompanied or followed by the application of forces to produce the shard-like structure. The invention also relates to multicomponent mixtures from the field of solid detergents or multicomponent compounds suitable for this field of application which are characterized by the presence of the sodium silicates defined above.
摘要:
Processes for the production of polymers by emulsion polymerization of olefinically unsaturated monomers, in which olefinically unsaturated esters corresponding to formula (I): HOOC—CH═CH—COO—(BO)z(PO)y(EO)xR1 (I) in which R1 is an alkyl group or alkenylphenol group containing 8 to 24 carbon atoms, BO is a butylene oxide unit, PO is a propylene oxide unit and EO is an ethylene oxide unit and the indices x, y and z independently of one another stand for 0 or for numbers of 1 to 50, with the proviso that at least one of the indices x, y and z is not 0, the carboxyl group of the compounds (I) being completely or partly present in neutralized form and the C═C double bond being cis- or trans-configured; are used as copolymerizable emulsifiers.
摘要:
A transfer switch for load-tap changers of the Jansen-type is provided with a non-linear surge voltage protective resistor forming a shunt across two taps of a tapped transformer winding and arranged in such a way that a breakdown of the resistor does not result in a short-circuit across the section of the tapped winding situated between the two taps.
摘要:
The invention is directed to an emulsifier for emulsion polymerization. The emulsifier is obtained by alkoxylating a mixture of (a) 20% to 80% by weight of a fatty alcohol containing 8 to 22 carbon atoms and (b) 20% to 80% by weight of a ring opening product of a 1,2-epoxyalkane containing 8 to 18 carbon atoms with ethylene glycol, with from 5 to 100 mol ethylene oxide per equivalent of free OH groups in the sums of (a) and (b) and sulfation of the intermediate product obtained to form the emulsifier. The emulsifier provides a polymer similar with low coagulum and high stability.