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Plasticiser alcohol and production improvement

A feed and product technology, applied in the preparation of organic compounds, carbon monoxide reaction preparation, chemical instruments and methods, etc., can solve the problem of difficult analysis of methyl esters, etc., to reduce environmental burden, low volatility, and improve performance. Effect

Active Publication Date: 2014-12-24
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time it has been found that it is difficult to analyze such methyl esters in mixtures of C6-C15 alcohols

Method used

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  • Plasticiser alcohol and production improvement
  • Plasticiser alcohol and production improvement

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Experimental program
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Embodiment

[0109] C9 hydroformylation products are produced by hydroformylation of octene mixtures obtained from the oligomerization of n-butenes with H-ZSM-57 catalyst. The hydroformylation product contained, by weight and analyzed by GC, about 12.3% olefins plus paraffins, a total of 62.7% aldehydes, alcohols and formates, 17.9% acetals and 7.1% other heavies . The hydroformylation product is further characterized by a carbonyl number of 200 mg KOH / g, an acid value of 3.22 mg KOH / g, and a crude cold saponification value of 35.61 mg KOH / g. The net cold saponification value is therefore 32.39 mg KOH / g.

[0110] The C9 hydroformylation product was fed into the first hydrogenation reactor containing 250 ml of sulfurized Ni / Mo catalyst at a rate of 440 ml / h, together with 800 ml / h of water product recycle, at a pressure of 80 barg and Operating at a temperature of 180°C, with a hydrogen excess of 400% and 2.9 wt% water in the hydrogenation feed. The product of the first hydrogenation rea...

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Abstract

A process using controlled oxonation and hydrogenation conditions is disclosed for the production of alcohols containing low amounts of methyl esters. The process for the production ofa C6-C15 alcohol mixture comprising the steps of a. hydroformylating an olefin mixture comprising a branched C5-C14 olefin to form a hydroformylation product comprising aldehydes and formate esters, whereby the hydroformylation product has a net cold sap number in the range of 15 to 38 mg KOH / g, and b. converting the aldehydes and formate esters to alcohols in a hydrogenation step comprising at least one first hydrogenation reactor comprising a fixed bed of a heterogeneous sulphided bimetallic catalyst, optionally followed by at least one second hydrogenation reactor connected downstream of the first hydrogenation reactor, c.; wherein the feed to the hydrogenation step (b) is a liquid comprising at least a portion of the aldehydes and formate esters formed m step (a) and at least 2 % water by weight, based on the liquid hydrogenation feed, and wherein the temperature in the first hydrogenation reactor is at most 200 DEG C, preferably in the range of from 150 to 200 DEG C.

Description

technical field [0001] The present invention relates to improved processes for the preparation of C6-C15 alcohol mixtures or related improvements, and to esters prepared from such alcohol mixtures. The alcohol mixtures provide improved polycarboxylates, especially phthalates, which are suitable as plasticizers for polymers. Background technique [0002] C6 to C15 alcohols are produced in large quantities throughout the world by the process of hydroformylation of olefins to aldehydes and subsequent hydrogenation of the aldehydes to alcohols. The hydroformylation process is also referred to as the oxo or oxo reaction process, and the alcohol is also referred to as the oxo-alcohol. Olefins used as feedstock for hydroformylation are generally oligomers of olefins obtained from petroleum feedstocks. Various methods can be used to produce olefins for hydroformylation. For example, in the mass production of nonanol for the preparation of plasticizer esters, the octene used can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/141C07C29/17C07C45/50
Inventor E·T·范德里斯奇J-J·G·马尔斯A·范维利特C·R·贝克C·M·亚布罗戈
Owner EXXONMOBIL CHEM PAT INC