Low temperature sulfuric acid alkylation process? What do you mean?

Luoyang Zhida Petrochemical Engineering **** design.

The world's first industrial CDALKY low-temperature alkylation plant was successfully started up at one time.

On May 20, 2013, the CDALKY alkylation unit designed by Luoyang Zhida Petrochemical Engineering Co., Ltd. was successfully started in Shandong Shenchi Chemical Group, produced qualified products, and was successfully put into normal operation, which marked the completion and operation of the world's first industrial CDALKY low-temperature sulfuric acid alkylation unit, which was widely praised by the owners.

The design capacity of 200,000 tons of alkylated oil plant adopts the American lummus company CDALKY sulfuric acid alkylation process technology route, from the pilot step to the industrial scale, Luoyang Zhida Petrochemical Engineering has undertaken a full range of technical support from feasibility study, overall design, linkage commissioning, feeding commissioning, etc. The process uses a reactor with acid hydrocarbon pump circulating fixed bed packing, the reaction temperature is as low as 0 ° -3 °, the olefin conversion rate is 100%, the product research octane number is as high as above, the acid consumption is only 50 kg tons of oil, the alkylated oil yield is 80-85%, the purity of n-butane is 95%, and the sulfur content of the product is less than 10ppm in the case of the raw material C4 sulfur content of 600ppm, which meets the design standard.

The smooth operation of the device has brought significant economic and social benefits to Shandong Shenchi Chemical Group, and has also accumulated experience for the cooperation between Luoyang Zhida Petrochemical Engineering and internationally renowned enterprises.

The Cdalky low-temperature alkylation unit was successfully started up the first time.

What is the use of shell-and-tube sulfur hail acid alkylation celery grip counterreactor.

Sulfuric acid acts as a catalyst to achieve alkylation of olefins. There are two kinds of stepped type and shell-and-tube type, in order to keep the reaction at a lower temperature, the former uses partial evaporation and endothermic cooling of the reactant itself, and the latter adopts the method of throttling expansion and refrigeration of the effluent after the reaction.

Post-ether C4 is used in these processes to lengthen the hydrocarbon chain or increase the molecular weight. Oily chemical substances (or gasoline or sodium blenders) that become liquids under the normIf the oil refining process is an oil product that breaks the world's largest molecules into different small molecular chains, the above three processes can be said to be the process of turning small molecule C4 into macromolecular oil in the reverse direction.

80% is in Shandong, and 80% in Shandong is in Dongying.

A lot, too many to count, Shandong is the most.

Measure the concentration of lye, temperature, or change the lye, reduce the level of the lye, measure the concentration of the pickling tank, the level, the change of the feed volume, etc.

Sulfuric acid [4].

Sulfur acid production uses solid sulfur as raw material, and adopts rapid sulfur melting, liquid sulfur filtration, liquid sulfur combustion, waste heat** and "3+1" two-turn and two-suction production processes. In order to make the best use of the high-temperature heat energy generated by liquid sulfur incineration and the medium-temperature heat energy generated by sulfur dioxide conversion, a medium-pressure fire-tube waste heat boiler is set up after the sulfur incinerator is set up, a high-temperature superheater is set up behind the first stage of the catalyst layer in the conversion process, a heat exchanger is arranged in the second stage, a heat exchanger and a economizer are arranged in the third stage, and a low-temperature superheater and economizer are arranged in the fourth stage. The system generates medium-pressure superheated steam and is incorporated into the steam pipe network, which can be sent to the power generation device; Large-scale air fans are mostly driven by steam turbines.

3. Smelting flue gas to produce acid[5] Non-ferrous metal smelting flue gas contains a large amount of sulfur dioxide, and if sulfur dioxide is directly emptied, it is not only a waste of resources, but also a huge harm to the environment. As smelting flue gas acid production plays an increasingly important role in the production of chemical raw materials, the sulfuric acid industry adopts dilute pickling purification process to reduce sewage discharge, and a large number of valuable metals in sewage are enriched after circulating washing, which is of practical significance to the comprehensive process. In order to make better use of smelting flue gas to produce acid, in recent years, there have been many effective improvement smelting technologies and other measures at home and abroad, and some are still in the experimental stage.

The general process is as follows:

a) Flue gas purification process (taking the new 660kt A copper smelting flue gas acid production system of Guixi Smelter of Jiangtong Group as an example) [6] In order to adapt to the characteristics of large periodic fluctuations in the volume and concentration of smelting flue gas, complex and changeable composition of smoke and dust, effectively remove harmful impurities such as copper, arsenic and fluorine in the flue gas, ensure the purification index of flue gas, and strengthen the purification effect of flue gas. Adiabatic evaporative cooling process. The purification process is as follows: first-stage dynamic wave scrubber (single-stage one-time reverse injection), one-stage gas cooling tower (packing tower), one-stage and two-stage powerwave scrubber (single-stage one-time reverse injection), and one-stage and two-stage electric mist eliminator. The dilute acid produced by the purification process is removed by the Gore membrane filter, and the flue gas is purified, dry suction and converted.

4. After desorption, sulfur dioxide is sent to the waste acid treatment device. (b) Dry cleaning process The dry suction process adopts a low-level and high-efficiency arrangement and a post-cooling process of circulating acid pump. (c) Conversion process The conversion process of the device is designed with a high-concentration sulfur dioxide conversion technology similar to that of the second series of sulfuric acid, and the sulfur dioxide content of the inlet converter is controlled to 12% by adding human air to the drying tower.

The conversion adopts 11-VLLL and "3+1" conversion heat exchange process, and the utilization of waste heat at low temperature is considered.

After the iron sulfide is crushed, it enters the boiling furnace for roasting, and the sulfur dioxide gas produced is cooled, dusted, dried (purified), enters the converter, and is generated by the catalyst to generate sulfur trioxide), and then added water after being absorbed by concentrated sulfuric acid.

1. Alkylation is the process by which alkyl groups are transferred from one molecule to another. It is a reaction in which an alkyl group (methyl, ethyl, etc.) is introduced into the molecule of a compound.

Alkylating agents commonly used in industry include olefins, halides, alkyl sulfates, etc. The alkylation product of lead is alkyl lead, of which tetraethyl lead is often used as a gasoline additive, as a riot agent, and alkylation is related to gasoline.

2. Alkylated oil is to react isobutylene in LPG (liquefied petroleum gas) with 1-butene, 2-butene and isobutylene to form isooctane, compared with traditional cracking oil, it has a high octane number (Ron is, Mon is good sensitivity, low vapor pressure, wide boiling point range, and does not contain aromatic hydrocarbons; Saturated hydrocarbons of sulfur and olefins, are ideal for high-octane clean gasoline composition.

To put it simply, compared with ordinary gasoline, alkylated oil has a low sulfur content, a high octane number, and a high calorific value of combustion. (It's an ideal alternative to clean gasoline.)

It is a blending component of gasoline, and in the eighties, the refinery lacked a high-octane component in the early stage, so the unit was imported from the United Oil Company of America, and this component was used to blend and export gasoline. At present, there is no shortage of high-octane components in major refineries, so the so-called alkylated oil is meaningless. What is currently lacking in the country is gasoline desulfurization, which is used to produce high-standard clean gasoline.