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Aromatics Production Technology (RHAROM)

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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.

Number of views:

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

Keywords:

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

Aromatics Production Technology (RHAROM)

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Application field

The raw material for this technology can start from benzene or toluene. When the starting material is benzene, benzene is firstly alkylated with methanol to produce toluene, and then toluene is form-selectively disproportionated to produce high-concentration crude p-xylene and benzene. Benzene is recycled. The crude p-xylene is refined by crystallization. High-purity para-xylene, mixed xylene and a small amount of C9 aromatics; when the starting material is toluene, toluene is directly disproportionated to produce crude para-xylene and benzene. The product scheme is high-purity para-xylene, benzene, mixed xylene and a small amount of C9 Aromatics.

The technology consists of two parts: benzene and methanol alkylation and toluene shape selective disproportionation. The configuration of the alkylation and disproportionation parts can be matched according to the scale, or different proportions can be adopted according to the plant conditions.

Process

The alkylation reaction is carried out in a multi-bed fixed-bed reactor. The vaporized benzene enters the reactor directly from the first bed, and the vaporized methanol enters each catalyst bed in stages. In the reactor, methanol and benzene undergo an alkylation reaction to produce toluene, xylene, C9 aromatics, etc. with high selectivity. The conversion rate of methanol in a single pass is 100%, and the selectivity of toluene to benzene is 91-95%. The selectivity of methanol is 85~90%. After the product is separated and refined, the purity of the toluene obtained is greater than 99.9%.

The disproportionation reaction is carried out in a fixed-bed reactor. The vaporized toluene enters the bed of the shape-selective disproportionation catalyst. The toluene disproportionates to form benzene and xylene. Due to the shape-selectivity of the catalyst, the xylene in the product can break through the equilibrium composition and obtain a high concentration of Para-xylene stream, the selectivity of para-xylene in the xylene stream reaches 90%. The generated disproportionation product is stably degassed, and after purification and separation, the purity of crude p-xylene is about 85%, and the purity of benzene reaches 99.9%.