Invention Grant
- Patent Title: Process for preparing cyclohexanepolycarboxylic acid derivatives having a low proportion of by-products
- Patent Title (中): 具有低比例副产物的环己烷多羧酸衍生物的方法
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Application No.: US14045178Application Date: 2013-10-03
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Publication No.: US09090553B2Publication Date: 2015-07-28
- Inventor: Martin Bock , Boris Breitscheidel
- Applicant: BASF SE
- Applicant Address: DE
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE
- Agency: Drinker Biddle & Reath LLP
- Main IPC: C07C61/09
- IPC: C07C61/09 ; C07C69/75 ; C07C51/36 ; C07C67/303

Abstract:
The present invention relates to a process for preparing at least one cyclohexanepolycarboxylic acid or a derivative thereof by bringing at least one corresponding benzenepolycarboxylic acid or a derivative thereof into contact with a hydrogen-comprising gas in the presence of at least one coated catalyst comprising an active metal selected from the group consisting of ruthenium, rhodium, palladium, platinum and mixes thereof, applied to a support material comprising silicon dioxide, where the pore volume of the support material is from 0.6 to 1.0 ml/g, determined by Hg porosimetry, the BET surface area is from 280 to 500 m2/g, at least 90% of the pores present have a diameter of from 6 to 12 nm, and from 40 to 70% by weight of the active metal, based on the total amount of the active metal, are present in the catalyst coating up to a penetration depth of 200 μm, wherein the contacting is carried out at a superficial velocity of not more than 50 m/h.
Public/Granted literature
- US20140100387A1 PROCESS FOR PREPARING CYCLOHEXANEPOLYCARBOXYLIC ACID DERIVATIVES HAVING A LOW PROPORTION OF BY-PRODUCTS Public/Granted day:2014-04-10
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