CN1169396A - Active carbon made from pentacarpus fruit kernel - Google Patents

Abstract

The present invention relates to an unshaped granular active carton which is made up by using fruit kernel of subtropical choerospondias axillaris as raw material and adopting traditional technological process including such steps of carbonization, activation and screening, etc.. Said invented active carbon possesses the following good physical properties: specific surface area 1000-1800 sq M/g, total pore volume 0.9 cu cm/g, micropore volume 0.45 cu cm/g, mesopore volume 0.2 cu cm/g, true specific weight 2 G/cu cm and specific heat 0.24 calorie/gram C.

Description

Five-eyed fruit pit active carbon

The invention relates to the field of activated carbon, in particular to activated carbon prepared by taking a fruit kernel of fructus fici as a raw material.

The activated carbon has strong chemical stability, can regenerate a plurality of chemical agents, is widely used in the fields of petrochemical industry, medicine, food, national defense, environmental protection and the like, and has the annual output of five to sixty-ten thousand tons of activated carbon in all countries around the world according to statistics and is increased by 7 percent every year. The raw materials for preparing the activated carbon are various and comprise wood raw materials, mineral raw materials and the like, however, the history of the preparation and the application of the activated carbon proves that the activated carbon prepared from the wood raw materials has four unique advantages compared with the activated carbon prepared from other raw materials: large porosity, large specific surface area, high reactivity and less ash content. Therefore, the search for suitable new wood raw material activated carbon has been the direction of activated carbon research.

The inventor researches the production process and raw materials of the activated carbon for a long time, finds that the kernels of the fructus Choerospondiatis (also known as Choerospondias axillaris, and Choerospondias acalliris) are very suitable to be used as the raw materials of the activated carbon after repeated demonstration and experiments, particularly finds that the annual yield of the fructus Choerospondiatis in Hunan can reach 4-5 ten thousand ram the loose soil with a stone-roller after sowing after field investigation and research on the yield of the fructus Choerospondiatis in Hunan, and has great economic benefit and social benefit if developed. The fructus Choerospondiatis is in the genus Choerospondias of Anacardiaceae, and is subtropical, so that the fructus Choerospondiatis is not only available in Hunan, but also has abundant resources in provinces and parts of southwest in the central and south regions, and is a very worthy-to-be-developed project.

The technical scheme of the invention is that the raw material of the corn kernels is screened to remove ash, and then the corn kernels enter a carbonization furnace after sand and stone are removed. The volatile products (combustible gas and gaseous wood tar) generated by distilling the fruit cores in the carbonization furnace are combusted and heated to 400-500 ℃, and carbonized by low-temperature carbonization. And the carbonized material after carbonization is subjected to sand removal, crushing, screening and grading and then entersan activation furnace for activation. The carbonized material is activated by superheated steam at high temperature of 750 ℃ and 950 ℃ in the presence of trace oxygen. The activated active carbon is subjected to sand removal, crushing, screening, acid washing and drying to obtain an amorphous granular or powdery finished product.

Therefore, the pentacta nut active carbon provided by the invention not only has all advantages of wood raw material activity, but also develops a new raw material for manufacturing the active carbon. The raw material has never been utilized in the past, and the natural growth and disappearance of wild fruits have been the natural growth for a long time, so that the development of the raw material has great positive influence on the economic development of subtropical mountain areas.

The pentacta kernel activated carbon of the present invention is manufactured using a gas activation production process because the gas activation process activates the carbon at high temperatures using steam, carbon dioxide (typically using flue gas), or air (which may also be oxygen) as an activator. The fructus fici kernel active carbon is an amorphous granular carbon produced by a water vapor method, does not consume chemical agents, and does not need special materials for equipment. After dry distillation and carbonization, the basic reaction of the fructus Choerospondiatis with water vapor is as follows: water carbon △ heat of hydrogen to oxygen carbon

The above reaction formula is an endothermic reaction and is also the main reaction for producing water gas.

The production process of the five-eyed fruit pit activated carbon is as follows:of the five-eyed fruit pits of the present inventionThe yield can reach about 21 percent, and the technical parameters of the product are as follows: specific surface area of 1000-1800M²Per g total pore volume 0.9cm³A micropore volume of 0.45 cm/g³Mesopore volume of 0.2 cm/g³Specific gravity of 2g/cm³Specific heat of 0.24 cal/g C.

Claims (1)

1. The invention discloses a pentacta kernel activated carbon, which is characterized in that the pentacta kernel activated carbon is prepared by taking the pentacta kernel as a raw material, and the preparation process of the pentacta kernel activated carbon comprises the following steps:

removing sand from the kernels of the fructus Choerospondiatis, crushing, screening, carbonizing, activating, removing sand again after activating, crushing, screening, washing with hydrochloric acid, washing with water, and drying to obtain the active carbon of the kernels of the fructus Choerospondiatis.