Detail of "1076-97-7"

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CAS Number:
1076-97-7
Name:
Terephthalic acid, hexahydro-
Superlist Name:
1,4-Cyclohexanedicarboxylic acid
Molecular Structure:
Formula:
C₈H₁₂O₄
Molecular Weight:
172.18
Synonyms:
Acide cyclohexane-1,4-dicarboxylique;Cyclohexane-1,4-dicarboxylic acid;Hexahydroterephthalic acid;1,4-Dicarboxycyclohexane;CHDA;UNII-13LBH83IU4;
EINECS:
214-068-6
Density:
1.314 g/cm³
Melting Point:
165-168 °C
Boiling Point:
384.1 °C at 760 mmHg
Flash Point:
235 °C
Solubility:
soluble in water
Appearance:
white fine crystalline powder
Hazard Symbols:
Xn
Risk Codes:
22-36
Safety:
26-36 Details

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Catalyst for producing 1,4-cyclohexanedicarboxylic acid dimethyl ester by hydrogenation of dimethyl terephthalate and its preparation: Catalyst for producing 1,4-cyclohexanedicarboxylic acid dimethyl ester by hydrogenation of dimethyl terephthalate and its preparation. Lin, Peizi; Duan, Dayong; Ding, Yunjie; Wang, Kailin; Qin, Rijin; Zhang, Liqun (Research Institute of Tianjin Branch, China Petro-Chemical Co., Ltd.; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Peop. Rep. China). Faming Zhuanli Shenqing Gongkai Shuomingshu CN 1380282 A 20 Nov 2002, 7 pp. (Chinese). (People's Republic of China). CODEN: CNXXEV. CLASS: ICM: C07C069-75. ICS: C07C067-303. APPLICATION: CN 2001-110643 13 Apr 2001. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) The hydrogenation catalyst is composed of Pd as main component 0.01-10, first adjuvant (such as Ca, Ba, Mg, or other IIA metal) 0.1-1.0, second adjuvant (such as Rh, Ru, Ir, Pt, or other VIII metal) 0.01-1.0, and Al2O3 as carrier to 100%. The catalyst is prepd. by soaking Al2O2 in the sol. salt (such as nitrate or chloride) soln. of Pd and all adjuvants, drying, and hydrogenating at 100-500° for 0.5-14 h. 1,4-Cyclohexanedicarboxylic acid di-Me ester was prepd. by hydrogenation of di-Me terephthalate in the presence of the hydrogenation catalyst.

1,4-Cyclohexanedicarboxylic acid: 1,4-Cyclohexanedicarboxylic acid. (Toray Industries, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 58198439 A2 18 Nov 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C061-09; C07C051-36. ICA: B01J023-44; B01J023-46. APPLICATION: JP 82-78144 12 May 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) 1,4-Cyclohexanedicarboxylic acid (I) [1076-97-7] is prepd. by hydrogenating aq. solns. of terephthalic acid (II) [100-21-0] in the presence of Pd or Ru catalysts at 110-180°, and filtering at t° in such a way that t 343.5 log10C + 69.6 (c = percent of I in the aq. soln.) to remove catalysts. Thus, a mixt. of II 276, active carbon-supported Pd catalyst (10% Pd) 5.52, and water 924 kg was treated with H in an autoclave at 150° and 100 kg/cm2 gage for 6 h, filtered at 150° to remove catalyst, and cooled to ￡40° to give 260 kg I contg. 43 ppm ashes. A 50% solids aq. soln. of neutral I salt with undecamethylenediamine was heated at 320° to give white copolymer [72928-95-1] having elongation of injection-molded sheet 35%, compared with 12% for a similarly prepd. 86274-66-0 and 1076-97-7 are just another two chemicals used in this study. polymer (light yellow) from I prepd. by hydrogenating di-Na terephthalate in the presence of Ni catalyst. .