Modern Production Methods Based on 1,3-Butadiene and 1-Butene

Abstract

Development of new technical processes based on urtsaturated hydrocarbons Chemische Werke Huels A.G. has developed, in the past few years, several new technical processes, based on unsaturated hydrocarbons obtained from C4 cuts, to the point where they can be used in production. Inasmuch as large supplies of C4 cuts are expected to be readily available in the near future, we shall have access to relatively inexpensive raw materials for our processes (Figure 1). Polyamide 12From butadiene, the starting material, we proceed by means of trimerization, using a Ziegler-Natta catalyst, to cyclododecatriene, which is subsequently hydrogenated into cyclododecane. Cyclodecanone is then formed through air oxidation in the presence of boric acid, and its oxime is rearranged into lauryl lactam. The polyamide 12 obtained from lauryl lactam possesses a carbon chain which is six carbon atoms longer than nylon 6. This is the reason why polyamide 12 has a much lower water absorption capacity and, besides other areas of application, is consequently used with preference for precision parts in valves. Its use for powder coating by the fluidization dip and electrostatic technique should also be mentioned.

Bifunctional Catalytic System Effective for Oxidative Dehydrogenation of 1-Butene and n-Butane Using Pd-Based Intermetallic Compounds

“…Initially, surface PdIn is oxidized into Pd and In 2 O 3 (1). Pd and In 2 O 3 are placed adjacent to each other during this process.…”

“…■ INTRODUCTION 1,3-Butadiene is an important feedstock of butadiene polymer, the demand for which is expanding. 1 In general, it is produced by dehydrogenation of 1-butene. 2 The dehydrogenation process is divided into two categories: (1) nonoxidative and (2) oxidative dehydrogenation, 3 (2)…”

“…1 In general, it is produced by dehydrogenation of 1-butene. 2 The dehydrogenation process is divided into two categories: (1) nonoxidative and (2) oxidative dehydrogenation, 3 (2)…”

Nanodiamond‐Core‐Reinforced, Graphene‐Shell‐Immobilized Platinum Nanoparticles as a Highly Active Catalyst for the Low‐Temperature Dehydrogenation of n‐Butane

“…The increasing demand for olefins as a chemical feedstock in the chemical and petrochemical industries has highlighted the fact that olefin production is an indispensable process. In particular, the olefins of C 4 alkanes are important feedstocks for commercial plastics, synthetic rubbers, and automotive fuel components . Industrial production of these olefins typically involves either the direct dehydrogenation (DDH) or oxidative dehydrogenation (ODH) of paraffin.…”

“…In particular,t he olefins of C 4 alkanesa re important feedstocks for commercial plastics, synthetic rubbers, and automotive fuel components. [1][2][3][4] Industrial production of these olefins typically involves either the direct dehydrogenation (DDH) or oxidative dehydrogenation (ODH) of paraffin. ODH is an exothermic process and employso xidants such as gaseous oxygen and carbon dioxide;h owever,o veroxidation of the hydrocarbonsi s the main limiting factor of this process.…”