318292-43-2Relevant articles and documents
HYDROGENATION OF AROMATIC COMPOUNDS
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Paragraph 0094-0111, (2021/02/05)
Process for hydrogenating aromatic compounds over a solid catalyst in the presence of a hydrogen-containing gas comprising a first reactor operated in loop mode, a second reactor operated in straight pass, at least part of the output of the first reactor
Preparation method of environment-friendly plasticizer cyclohexane 1 and 2 -isononyl phthalate
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Paragraph 0047-0055, (2021/11/19)
To the preparation method of the environment-friendly plasticizer cyclohexane 1 and 2 -isononyl phthalate, the phthalic acid diisononyl ester and hydrogen are used as raw materials, and hydrogenation reaction is carried out under the action of a metal sup
PLASTICIZER COMPOSITION AND RESIN COMPOSITION INCLUDING THE SAME
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Paragraph 0119-0120, (2021/07/31)
Provided is a plasticizer composition including: a cyclohexane-1,2-diester-based substance of the following Chemical Formula 1; and a citrate-based substance of the following Chemical Formula 2: wherein in Chemical Formula 1 and Chemical Formula 2: R1 and R2 each independently are a C8 to C10 alkyl group; and R3 to R5 each independently are a C5 to C10 alkyl group.
PLASTICIZER COMPOSITION AND RESIN COMPOSITION COMPRISING THE SAME
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Page/Page column 20, (2020/06/09)
Provided is a plasticizer composition including: a cyclohexane-1,2-diester-based substance and an epoxidized alkyl ester composition, and the plasticizer composition is environmentally friendly and has high stability and excellent basic properties.
Preparation method of cyclohexane-1, 2-dicarboxylate environment-friendly plasticizer
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Paragraph 0025-0028, (2020/02/14)
The invention relates to a preparation method of a cyclohexane-1, 2-dicarboxylate environment-friendly plasticizer, and belongs to the technical field of fine chemical engineering. A reaction system is composed of hexahydrophthalic anhydride, alcohol and a catalyst, wherein the molar ratio of the hexahydrophthalic anhydride to the alcohol is 1:(2-2.8), the mass of the added catalyst is 0.1-1% of the mass of the hexahydrophthalic anhydride and the alcohol. The method includes heating and stirring under normal pressure; and then carrying out dealcoholization, decoloration, fine alkali washing, water washing, filter pressing and steam stripping to obtain the cyclohexane-1, 2-dicarboxylate environment-friendly plasticizer. By adopting the ionic liquid catalyst, the method has the advantages oflow catalytic temperature, few byproducts, easiness in separation of the catalyst and the product, controllable catalytic system, high thermal stability, reusability, low energy consumption, simple production process, environmental friendliness and the like. Ion exchange resin is used for decoloration, and compared with conventional activated carbon decoloration, the ion exchange resin has the advantages of being high in decoloration speed, high in yield, convenient to use, clean, environmentally friendly and the like.
Hydrogenation catalyst, its method of preparation and use
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Page/Page column 16, (2018/12/11)
A method of producing a hydrogenation catalyst, for example, a phthalate hydrogenation catalyst, comprising contacting a silica support having a medium pore size of at least about 10 nm with an acid to produce a treated silica support, and depositing a no
Preparation method for diisononyl cyclohexane-1,2-dicarboxylate
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Paragraph 0020; 0021; 0022; 0023; 0024; 0025, (2017/08/28)
The invention provides a preparation method for diisononyl cyclohexane-1,2-dicarboxylate. The preparation method comprises the following steps: 1) adding hexahydrophthalic anhydride, isononanol and acetic anhydride into a reaction vessel at the same time, carrying out heating to 180 to 300 DEG C and then carrying out stirring and dehydration for 2 to 5 h, wherein a mol ratio of hexahydrophthalic anhydride to isononanol is 1: (2-5), and the addition amount of acetic anhydride is 1 to 10% of the mass of hexahydrophthalic anhydride; 2) removing excess alcohol through flash evaporation by using a falling-film evaporator at a negative pressure of -0.02 MPa to 0.096 MPa, wherein retention time is 0.001 to 0.05 h; 3) introducing water vapor and nitrogen into a stripping tank for bubbling and removing low-molecular-weight impurities in a material 2 through evaporation; and 4) adding active carbon accounting for 1 to 10% of the mass of a material 3 into a decoloring kettle and carrying out decoloring and filtering so as to obtain the final product diisononyl cyclohexane-1,2-dicarboxylate, wherein yield reaches 98.5% and purity reaches 99.8%. According to the invention, a single-step high-temperature esterification process is employed, so reaction time is greatly shortened; excess alcohol is removed through pressure-reduced flash evaporation, so energy consumption is lowered, and the phenomenon of emulsification is avoided; and neutralization and washing are not needed, so alkaline waste water is not produced, and the preparation method is suitable for large-scale industrial production.
A manufacturing method for cyclohexane polyacid ester
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Paragraph 0030; 0033, (2017/06/02)
The present invention provides a manufacturing method for cyclohexane polyacid ester, comprising an esterification step and a hydrogenation step. The esterification step is to esterify benzene polycarboxylic acid or anhydride thereof with alcohol to form a crude product of benzene polycarboxylic acid ester, in which the crude product of benzene polycarboxylic acid ester contains excess alcohol. The hydrogenation step is to hydrogenate the crude product of benzene polycarboxylic acids ester under no purification condition with excess alcohol in a catalyst-containing continuous fixed-bed reactor to form the cyclohexane polyacid ester. The manufacturing method for cyclohexane polybasic ester provided by the present invention can reduce purification processes which are complicate and energy-intensive. Furthermore, the hydrogenation is performed under a lower hydrogen pressure such that the process cost is effectively reduced and the hydrogenation rate of the benzene ring is higher than 99.9%.
Method for preparing aliphatic (cycloaliphatic) ester compound
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, (2017/01/02)
The invention relates to a mild-condition method for preparing an aliphatic (cycloaliphatic) ester compound, particularly preparation of an alkyl cyclohexanecarboxylate compound. The ester compound can serve as an environment-friendly plasticizer in plastics, so that the occurrence of side reactions such as polymerization, etherification and the like of aliphatic alcohol compounds in the existing esterification processes under high-temperature conditions is avoided. The method comprises the specific reaction steps: (a) preparing aliphatic chloro-formate in a reaction rectification tower in the absence of a catalyst/solvent; and (b) catalyzing an aliphatic (cycloaliphatic) Grignard reagent to react with the aliphatic chloro-formate by a metal manganese compound, so as to produce the ester compound.
PROCESS FOR HYDROGENATION OF POLYCARBOXYLIC ACIDS OR DERIVATIVES THEROF
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Paragraph 0061; 0062; 0063, (2013/06/27)
The disclosure provides a process for hydrogenation of polycarboxylic acids or derivatives thereof, including: hydrogenation of polycarboxylic acids or derivatives thereof in the presence of a catalyst, wherein the catalyst includes an active metal and a
