chemistry

Otto Roelen

Otto Roelen is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Otto Roelen rather than just read about it. In short: Otto Roelen (22 March 1897 – 30 January 1993) was a German chemist who pioneered using carbon monoxide to synthesize of organic compounds. Roelen was born in Mülheim, Germany and studied chemistry and graduated in 1922 from Technische Hochschule Stuttgart.

Key takeaways

Otto Roelen belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Otto Roelen to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Otto Roelen from memory before moving on to harder problems.

Reference excerpt

Otto Roelen (22 March 1897 – 30 January 1993) was a German chemist who pioneered using carbon monoxide to synthesize of organic compounds. Roelen was born in Mülheim, Germany and studied chemistry and graduated in 1922 from Technische Hochschule Stuttgart. He worked with Franz Fischer and Hans Tropsch at the Kaiser Wilhelm Institute for Coal Research from 1922. He developed the homogeneously catalysed hydroformylation process (also known as "oxo synthesis") for the industrial synthesis of aldehydes from alkenes and carbon monoxide. During the Second World War he was chief chemist for Ruhrchemie. After the war he described the construction, operation and yields of oxo synthesis plants in detail to British Department of Scientific and Industrial Research interrogators. Roelen was awarded the Adolf von Baeyer prize by the Gesellschaft Deutscher Chemiker in 1963. In his honor, DECHEMA named the Otto Roelen prize after him. He died in Bad Honnef, Germany, at the age of 95.

References Boy Cornils; Wolfgang A. Herrmann; Manfred Rasch (1994). "Otto Roelen, Pioneer in Industrial Homogeneous Catalysis". Angewandte Chemie International Edition in English. 33 (21): 2144–2163. doi:10.1002/anie.199421441.

External links Life and work (Technische Universität Braunschweig)

Worked examples

Example 1 — a first encounter with Otto Roelen

Start with the simplest possible case. Write down what Otto Roelen claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Otto Roelen before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Otto Roelen ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Otto Roelen

In research: Otto Roelen appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Otto Roelen in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Otto Roelen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1897 births, 1993 deaths, 20th-century German chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Otto Roelen outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Otto Roelen in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Otto Roelen means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Otto Roelen out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Otto Roelen in simple terms?

Why does Otto Roelen matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Otto Roelen?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Otto Roelen.