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Ethylbenzene/styrene production technology

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Butadiene Production Technology (RHBD)

Ruihua's technology for butadiene production by oxygen-enriched dehydrogenation of butenes uses different feeding methods and different feed compositions to solve the blockage of the second-stage reactor of the traditional oxidative dehydrogenation process and extend the catalyst operation cycle. Due to the change of the feed composition, the energy consumption of the entire device is greatly reduced.

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1000

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Ethylbenzene/styrene production technology

Changzhou Ruihua Chemical has accumulated more than ten years of experience in ethylbenzene/styrene industrial engineering design, and successfully developed a complete set of ethylbenzene/styrene process technology at the beginning of the company's establishment. After nearly 10 years of technological improvement, the technology package has reached the leading level in all evaluation indicators in the latest equipment currently in operation.

Number of views:

1000

Keywords:

Propylene oxide/styrene co-production technology (RHPOSM)

Propylene oxide is the third largest propylene derivative after polypropylene and acrylonitrile. It is mainly used in the production of polyether and propylene glycol. Its derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine and cosmetics. . Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products.

Number of views:

1000

Keywords:

Expansion Technology for Dry Gas Production of Ethylbenzene

Up to now, some domestic devices in China have applied the technology of producing ethylbenzene/styrene from dry gas, mainly those with an annual output of 60,000 to 80,000 tons of styrene, which are distributed in PetroChina, Sinopec, ChemChina and various private enterprises. The dry gas method was used as a raw material to produce ethylbenzene, which solved the problem of dry gas resource utilization at that time. However, in the actual production for many years, the load of most of the dry gas to ethylbenzene/styrene equipment cannot reach the design value, let alone increase the production capacity to increase the efficiency when the price of styrene rises.

Number of views:

1000

Keywords:

Aromatics Production Technology (RHAROM)

Ruihua aromatics production technology can be used to produce benzene, toluene and xylene products. This technology is highly adaptable to the market, and the product scheme can be adjusted according to demand, and it is very competitive in small and medium-sized industrial applications.

Number of views:

1000

Keywords:

Para-xylene crystallization technology

The process of separating p-xylene by crystallization is an older process still in use. Before the emergence of adsorption separation technology, the separation of p-xylene by crystallization was the only technology for refining p-xylene. Due to the development of adsorption technology, the existing crystallization technology for the separation of mixed xylenes for equilibrium components no longer has advantages, but the separation of mixed xylenes for high-concentration p-xylene is still attractive.

Number of views:

1000

Keywords:

Maleic Anhydride Production Technology (RHMA)

Maleic anhydride is one of the three major acid anhydride raw materials in the world (acetic anhydride, maleic anhydride, phthalic anhydride), and its downstream products have a wide range of development and application prospects, which can be used in synthetic resins, coatings, pesticides, lubricant additives, medicine, and paper Treatment agents, food additives, stabilizers, etc.

Number of views:

1000

Keywords:

Low-carbon olefin production technology (RHMTP)

Ruihua C4 cracking unit is transformed into methanol to propylene production technology, which can be used to produce propylene, ethylene, liquefied petroleum gas and aromatic gasoline. This technology is highly adaptable to the market, and the product scheme can be adjusted according to demand, and it is very competitive in small and medium-sized industrial applications.

Number of views:

1000

Keywords:

Succinic anhydride production technology

Succinic anhydride is a widely used organic chemical raw material. It can be used to produce vitamins, antibiotics; plant growth inhibitors, chemical intermediates and additives. It can also produce cross-linking agents, light stabilizers, and ultraviolet absorbers for polymer compounds; prepare alkyd resins, anthraquinone dyes, reinforcing fibers, and so on.

Number of views:

1000

Keywords:

Energy-saving butadiene production technology

Butadiene ranks second only to ethylene and propylene in petrochemical olefin raw materials. Butadiene is the main raw material for the production of synthetic rubber (styrene butadiene rubber, butadiene rubber, nitrile rubber, and neoprene). With the development of styrene plastics, copolymerization of styrene and butadiene is used to produce various resins with a wide range of uses (such as ABS resin, SBS resin, BS resin, MBS resin), making butadiene increasingly important in resin production status. In addition, butadiene is still used to produce 1,4-butanediol (engineering plastics), dinitrile (nylon 66 monomer), sulfolane, tetrahydrofuran, etc., so it is also an important basic chemical raw material.

Number of views:

1000

Keywords:

Core equipment

Ethylbenzene/styrene key equipment manufacturing

Number of views:

1000

Keywords:

Manufacturing of key equipment for aromatics production technology

Number of views:

1000

Keywords:

Manufacturing of key equipment for maleic anhydride production technology

Number of views:

1000

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Manufacturing of key equipment for propylene oxide/styrene co-production technology

Number of views:

1000

Keywords:

Design and development of SMPO wastewater three-effect evaporator

The wastewater produced in the SMPO production process is extremely difficult to treat due to its high temperature, high alkalinity, and high chemical oxygen consumption characteristics, which makes it difficult for the bacteria to survive biochemical treatment.

Number of views:

1000

Keywords:

Manufacturing Technology of Double Tube Sheet Heat Exchanger

Double tube plate is a relatively common structure in heat exchangers in recent years. In order to avoid mixing of the two media in the tube side and the shell side to cause the material to be scrapped or cause a major accident, the double tube plate structure is generally adopted. During the hydraulic test of the equipment, the inner tube sheet leaked, which was difficult to rework, which would cause the equipment to be reworked. Therefore, the difficulty in manufacturing the heat exchanger with this structure was mainly the expansion of the inner tube sheet. If there is no experience in expansion of the same material and specification, expansion simulation test should be done to determine the expansion parameters.

Number of views:

1000

Keywords:

Key equipment for p-xylene crystallization process

Number of views:

1000

Keywords:

Multiple device internals

Since its establishment 7 years ago, our company has provided various types of chemical equipment with multi-patented internals and pipeline mixers, nozzles, distributors, mixers, etc. to ensure the mixing effect of reactant streams and ensure the reaction effect. The company’s research and design in this area has significant advantages. The company has completed the research and design of coal gasifier nozzles, and the research and design of FCC heavy oil catalytic cracking nozzles. The successful research and trial production of these core equipment will bring the company to super Billion in sales. People in the industry are welcome to follow the process requirements, and we will customize them according to the requirements. We will provide a series of services from design to manufacturing, inspection, installation, etc., to relieve users from worries.

Number of views:

1000

Keywords:

Catalyst

Hβ molecular sieve protective catalyst

As a kind of solid acid catalyst with three-dimensional twelve-element ring channel structure, Hβ molecular sieve has good acidity and thermal stability, and is widely used in alkylation reaction. In addition, the catalyst can effectively remove the basic nitrogen in the raw material.

Number of views:

1000

Keywords:

Ethanol dehydration/tert-butanol dehydration catalyst

Changzhou Ruihua’s dehydration catalyst (RAO) has the characteristics of high specific surface area, surface acidity, high catalytic selectivity, excellent thermal stability, high mechanical strength, and good particle size, and can be used as a general dehydration catalyst.

Number of views:

1000

Keywords:

Acetophenone/Dimethyl Adipate Hydrogenation Catalyst

Changzhou Ruihua's hydrogenation catalyst (KAH) has the characteristics of high conversion rate, good selectivity, high mechanical strength, and long life. It can be used as a general hydrogenation catalyst.

Number of views:

1000

Keywords:

Number of views:

1000

Ethylbenzene/styrene production technology

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Process development direction-energy saving and consumption reduction

● Ethylene part-the improvement of ethylene transportation, loading and unloading, storage, material supply and cold energy recovery and utilization systems.

● Ethylbenzene part-optimization of raw material ratio in the alkylation reaction, steam utilization between reactor sections, improvement of the design and parameters of each separation tower.

● Styrene part-the pressure drop of the feed and reaction system is reduced, the arrangement and setting parameters of each heat exchanger are improved, the steam recovery application, the update design of each separation tower, and the tail gas recovery improvement.

Key patented technology

The ethylbenzene dehydrogenation reactor adopts the way that materials flow radially in the axis of the reactor. The uniform distribution of the fluid adopts a hyperbolic cone, which eliminates the pressure drop across the perforated plate, rationally utilizes the radial flow technology, optimizes the design of the collection and split flow channels, so that the pressure drop of the reactor meets the requirements of the negative pressure reaction.

This design has the following advantages:

● Minimize the pressure drop of the catalyst bed.

● The reaction materials are mixed fully in the reactor, and the process meets the requirements of reaction kinetics.

● There is no coking phenomenon during operation to ensure normal, stable and long-term operation of production.

● The styrene yield is high, the selectivity is good, and the production index is leading.

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